diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
index 8de2ed5..b65cccd 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
@@ -15,12 +15,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -38,7 +38,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -46,7 +46,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
   auth_request_sent == 1
@@ -104,19 +104,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804036470f1
 DVLR GSUP rx 17: 10010809710000004026f00804036470f1
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:46071
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -130,7 +130,7 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 - sending LU Accept for IMSI-901700000004620:MSISDN-46071
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + attached: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating in cascade, depth 2 (cause = OSMO_FSM_TERM_PARENT, caused by: upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU))
@@ -142,11 +142,11 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 4
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 4 (conn,vlr_gsupc_read_cb,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 - BSSAP Clear --GERAN-A--> MS
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated, including all deferred deallocations
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 2 (conn,attached)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
@@ -161,7 +161,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-46071: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -177,8 +177,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -190,7 +190,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-46071: tuple use_count=1 key_seq=1 auth_types=0x1 and...
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use - compl_l3 == 0 (0x0: )
@@ -268,8 +268,8 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
@@ -282,17 +282,17 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ)
 DRLL IMSI-901700000004620:MSISDN-46071: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + test_ciph: now used by 2 (attached,test_ciph)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + SMS-receiver: now used by 3 (attached,test_ciph,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000004620:MSISDN-46071 callref 40000001) New transaction
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + SMS: now used by 4 (attached,test_ciph,SMS-receiver,SMS)
 DLSMS SMC(0) instance created for network
 DLSMS SMR(0) instance created for network.
 DLSMS SMR(0) message SM-RL-DATA_REQ received in state IDLE
@@ -304,15 +304,15 @@
 DMM Subscriber IMSI-901700000004620:MSISDN-46071 not paged yet, start paging.
   GERAN-A sends out paging request to IMSI 901700000004620, TMSI 0xffffffff, LAC 23
   strcmp(paging_expecting_imsi, imsi) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + Paging: now used by 5 (attached,test_ciph,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - test_ciph: now used by 4 (attached,SMS-receiver,SMS,Paging)
   paging_sent == 1
   paging_stopped == 0
 - the subscriber and its pending request should remain
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + test_ciph: now used by 5 (attached,SMS-receiver,SMS,Paging,test_ciph)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - test_ciph: now used by 4 (attached,SMS-receiver,SMS,Paging)
 - MS replies with Paging Response, and VLR sends Auth Request with third key
   MSC <--GERAN-A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
@@ -325,8 +325,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 5
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 6
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -338,7 +338,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-46071: tuple use_count=1 key_seq=2 auth_types=0x1 and...
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use - compl_l3 == 0 (0x0: )
@@ -417,15 +417,15 @@
 DMSC msc_tx 91 bytes to IMSI-901700000004620:MSISDN-46071 via GERAN-A
 - DTAP --GERAN-A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + test_ciph: now used by 5 (attached,SMS-receiver,SMS,conn,test_ciph)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - test_ciph: now used by 4 (attached,SMS-receiver,SMS,conn)
 - conn is still open to wait for SMS ack dance
   llist_count(&net->ran_conns) == 1
 - MS replies with CP-ACK for received SMS
@@ -458,21 +458,21 @@
 DLSMS SMR(0) RX SMS RP-ACK
 DLSMS SMR(0) new RP state WAIT_FOR_RP_ACK -> IDLE
 DLSMS RX SMS RP-ACK (MO)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - SMS-receiver: now used by 3 (attached,SMS,conn)
 DLSMS SMR(0) TX: MNSMS-REL-REQ
 DLSMS SMC(0) message MNSMS-REL-REQ received in state MM_ESTABLISHED
 DLSMS SMC(0) new CP state MM_ESTABLISHED -> IDLE
 DLSMS Got MMSMS_REL_REQ, destroying transaction.
 DLSMS SMR(0) clearing SMR instance
 DLSMS SMC(0) clearing instance
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
@@ -486,7 +486,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP)
 DRLL IMSI-901700000004620:MSISDN-46071: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -497,12 +497,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-46071
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-46071
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -537,12 +537,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -560,7 +560,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -568,7 +568,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   auth_request_sent == 1
   lu_result_sent == 0
@@ -627,19 +627,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804036470f1
 DVLR GSUP rx 17: 10010809710000004026f00804036470f1
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:46071
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -653,12 +653,12 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: lu_compl_vlr_new_tmsi()
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100, with TMSI 0x03020100
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->ran_conns) == 1
@@ -674,12 +674,12 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100: Message not permitted for initial conn: SMS:0x01
 - even though the TMSI is not acked, we can already find the subscr with it
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 + test_ciph_tmsi: now used by 2 (conn,test_ciph_tmsi)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0x03020100
   vsub->tmsi == 0xffffffff
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 - test_ciph_tmsi: now used by 1 (conn)
 - MS sends TMSI Realloc Complete
   MSC <--GERAN-A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100: MSC conn use + dtap == 1 (0x2: dtap)
@@ -687,9 +687,9 @@
 DMM TMSI Reallocation Completed. Subscriber: IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=1)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + attached: now used by 2 (conn,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -701,8 +701,8 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (conn,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (conn,attached)
 - BSSAP Clear --GERAN-A--> MS
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
@@ -717,16 +717,16 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 - Subscriber has the new TMSI
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + test_ciph_tmsi: now used by 2 (attached,test_ciph_tmsi)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0xffffffff
   vsub->tmsi == 0x03020100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - test_ciph_tmsi: now used by 1 (attached)
 ---
 - after a while, a new conn sends a CM Service Request using above TMSI. VLR responds with Auth Req, 2nd auth vector
   MSC <--GERAN-A-- MS: GSM48_MT_MM_CM_SERV_REQ
@@ -740,8 +740,8 @@
 DVLR Process_Access_Request_VLR(TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: is child of RAN_conn(TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -753,7 +753,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: tuple use_count=1 key_seq=1 auth_types=0x1 and...
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use - compl_l3 == 0 (0x0: )
@@ -831,8 +831,8 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
@@ -845,17 +845,17 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ)
 DRLL IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + test_ciph_tmsi: now used by 2 (attached,test_ciph_tmsi)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + SMS-receiver: now used by 3 (attached,test_ciph_tmsi,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 callref 40000002) New transaction
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + SMS: now used by 4 (attached,test_ciph_tmsi,SMS-receiver,SMS)
 DLSMS SMC(0) instance created for network
 DLSMS SMR(0) instance created for network.
 DLSMS SMR(0) message SM-RL-DATA_REQ received in state IDLE
@@ -867,15 +867,15 @@
 DMM Subscriber IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 not paged yet, start paging.
   GERAN-A sends out paging request to IMSI 901700000004620, TMSI 0x03020100, LAC 23
   paging_expecting_tmsi == 0x03020100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + Paging: now used by 5 (attached,test_ciph_tmsi,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - test_ciph_tmsi: now used by 4 (attached,SMS-receiver,SMS,Paging)
   paging_sent == 1
   paging_stopped == 0
 - the subscriber and its pending request should remain
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + test_ciph_tmsi: now used by 5 (attached,SMS-receiver,SMS,Paging,test_ciph_tmsi)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - test_ciph_tmsi: now used by 4 (attached,SMS-receiver,SMS,Paging)
 - MS replies with Paging Response using TMSI, and VLR sends Auth Request with third key
   MSC <--GERAN-A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
@@ -888,8 +888,8 @@
 DVLR Process_Access_Request_VLR(TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: is child of RAN_conn(TMSI-0x03020100:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 5
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 6
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -901,7 +901,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: tuple use_count=1 key_seq=2 auth_types=0x1 and...
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use - compl_l3 == 0 (0x0: )
@@ -980,15 +980,15 @@
 DMSC msc_tx 91 bytes to IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 via GERAN-A
 - DTAP --GERAN-A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + test_ciph_tmsi: now used by 5 (attached,SMS-receiver,SMS,conn,test_ciph_tmsi)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - test_ciph_tmsi: now used by 4 (attached,SMS-receiver,SMS,conn)
 - conn is still open to wait for SMS ack dance
   llist_count(&net->ran_conns) == 1
 - MS replies with CP-ACK for received SMS
@@ -1021,21 +1021,21 @@
 DLSMS SMR(0) RX SMS RP-ACK
 DLSMS SMR(0) new RP state WAIT_FOR_RP_ACK -> IDLE
 DLSMS RX SMS RP-ACK (MO)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - SMS-receiver: now used by 3 (attached,SMS,conn)
 DLSMS SMR(0) TX: MNSMS-REL-REQ
 DLSMS SMC(0) message MNSMS-REL-REQ received in state MM_ESTABLISHED
 DLSMS SMC(0) new CP state MM_ESTABLISHED -> IDLE
 DLSMS Got MMSMS_REL_REQ, destroying transaction.
 DLSMS SMR(0) clearing SMR instance
 DLSMS SMC(0) clearing instance
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
@@ -1049,7 +1049,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP)
 DRLL IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -1060,12 +1060,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=50462976
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -1100,12 +1100,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1123,7 +1123,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1131,7 +1131,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   auth_request_sent == 1
   lu_result_sent == 0
@@ -1189,19 +1189,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804036470f1
 DVLR GSUP rx 17: 10010809710000004026f00804036470f1
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:46071
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT, and we send an ID Request for the IMEI to the MS
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -1219,13 +1219,13 @@
 - DTAP --GERAN-A--> MS: GSM48_MT_MM_ID_REQ: 051802
 - DTAP matches expected message
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 - We will only do business when the IMEI is known
   llist_count(&net->ran_conns) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + test_ciph_imei: now used by 2 (conn,test_ciph_imei)
   vsub->imei[0] == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - test_ciph_imei: now used by 1 (conn)
 ran_conn_is_accepted() == false
   requests shall be thwarted
 DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
@@ -1261,11 +1261,11 @@
 - HLR accepts the IMEI
 <-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
 DVLR GSUP rx 14: 32010809710000004026f0510100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_IMEI}: Received Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 - sending LU Accept for IMSI-901700000004620:MSISDN-46071
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + attached: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_IMEI}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1277,10 +1277,10 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 4
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 4 (conn,vlr_gsupc_read_cb,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 - BSSAP Clear --GERAN-A--> MS
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 2 (conn,attached)
 <-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
@@ -1295,13 +1295,13 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-46071: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 - Subscriber has the IMEI
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + test_ciph_imei: now used by 2 (attached,test_ciph_imei)
   strcmp(vsub->imei, "423423423423420") == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - test_ciph_imei: now used by 1 (attached)
 ---
 - subscriber detaches
   MSC <--GERAN-A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
@@ -1310,12 +1310,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-46071
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-46071
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -1350,12 +1350,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1373,7 +1373,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1381,7 +1381,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   auth_request_sent == 1
   lu_result_sent == 0
@@ -1424,9 +1424,9 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000004620: Message not permitted for initial conn: SMS:0x01
   lu_result_sent == 0
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + test_ciph_imeisv: now used by 2 (conn,test_ciph_imeisv)
   vsub->imeisv[0] == 0
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - test_ciph_imeisv: now used by 1 (conn)
 - MS sends Ciphering Mode Complete with IMEISV, VLR accepts and sends GSUP LU Req to HLR
   MSC <--GERAN-A-- MS: GSM48_MT_RR_CIPH_M_COMPL
 DRR IMSI-901700000004620: CIPHERING MODE COMPLETE
@@ -1444,9 +1444,9 @@
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
   lu_result_sent == 0
 - Subscriber has the IMEISV
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + test_ciph_imeisv: now used by 2 (conn,test_ciph_imeisv)
   strcmp(vsub->imeisv, "4234234234234275") == 0
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - test_ciph_imeisv: now used by 1 (conn)
 ran_conn_is_accepted() == false
   requests shall be thwarted
 DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
@@ -1460,19 +1460,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804036470f1
 DVLR GSUP rx 17: 10010809710000004026f00804036470f1
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:46071
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -1486,7 +1486,7 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 - sending LU Accept for IMSI-901700000004620:MSISDN-46071
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + attached: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating in cascade, depth 2 (cause = OSMO_FSM_TERM_PARENT, caused by: upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU))
@@ -1498,11 +1498,11 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 4
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 4 (conn,vlr_gsupc_read_cb,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 - BSSAP Clear --GERAN-A--> MS
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated, including all deferred deallocations
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 2 (conn,attached)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
@@ -1517,7 +1517,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-46071: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -1528,12 +1528,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-46071
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-46071
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -1568,12 +1568,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1591,7 +1591,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1599,7 +1599,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   auth_request_sent == 1
   lu_result_sent == 0
@@ -1657,19 +1657,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804036470f1
 DVLR GSUP rx 17: 10010809710000004026f00804036470f1
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:46071
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT, and we send an ID Request for the IMEI to the MS
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -1687,13 +1687,13 @@
 - DTAP --GERAN-A--> MS: GSM48_MT_MM_ID_REQ: 051802
 - DTAP matches expected message
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 - We will only do business when the IMEI is known
   llist_count(&net->ran_conns) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + test_ciph_tmsi_imei: now used by 2 (conn,test_ciph_tmsi_imei)
   vsub->imei[0] == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 - test_ciph_tmsi_imei: now used by 1 (conn)
 ran_conn_is_accepted() == false
   requests shall be thwarted
 DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
@@ -1729,15 +1729,15 @@
 - HLR accepts the IMEI
 <-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: 32010809710000004026f0510100
 DVLR GSUP rx 14: 32010809710000004026f0510100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_HLR_IMEI_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: Received Event LU_COMPL_VLR_E_IMEI_CHECK_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100, with TMSI 0x03020100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_CHECK_IMEI_RESULT: vlr_gsupc_read_cb() returns 0
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
   llist_count(&net->ran_conns) == 1
@@ -1753,12 +1753,12 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100: Message not permitted for initial conn: SMS:0x01
 - even though the TMSI is not acked, we can already find the subscr with it
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 + test_ciph_tmsi_imei: now used by 2 (conn,test_ciph_tmsi_imei)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0x03020100
   vsub->tmsi == 0xffffffff
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100 - test_ciph_tmsi_imei: now used by 1 (conn)
 - MS sends TMSI Realloc Complete
   MSC <--GERAN-A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100: MSC conn use + dtap == 1 (0x2: dtap)
@@ -1766,9 +1766,9 @@
 DMM TMSI Reallocation Completed. Subscriber: IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSInew-0x03020100:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071, used=1)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100) VLR: update for IMSI=901700000004620 (MSISDN=46071)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + attached: now used by 2 (conn,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-46071:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1780,8 +1780,8 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (conn,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (conn,attached)
 - BSSAP Clear --GERAN-A--> MS
 DREF IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
@@ -1796,14 +1796,14 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 - Subscriber has the IMEI and TMSI
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + test_ciph_tmsi_imei: now used by 2 (attached,test_ciph_tmsi_imei)
   strcmp(vsub->imei, "423423423423420") == 0
   vsub->tmsi == 0x03020100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - test_ciph_tmsi_imei: now used by 1 (attached)
 ---
 - subscriber detaches, using TMSI
   MSC <--GERAN-A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
@@ -1812,12 +1812,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=50462976
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-46071:TMSI-0x03020100
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -1852,12 +1852,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000010650:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=R99 net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000010650 id=901700000010650
 DVLR New subscr, IMSI: 901700000010650
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1875,7 +1875,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends *UMTS AKA* Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f0036220104ac8d1cd1a51937597ca1016fe69a0fa2104dacc4b2622087a75f0ac9b84440023103747da4e31545baa2db59e500bdae04724108544d35b945ccba01a7f1293575291c325102d837d2b0d6f00004b282d5acf23428d270837527064741f8ddb03622010b2661531b97b12c5a2edc21a0ed16fc521042fb4cfad2208da149b11d473f40023103fe013b1a428ea737c37f8f0288c8edf2410f275438c02b97e4d6f639dddda3d10b9251078cdd96c60840000322f421b3bb778b12708ed3ebf9cb6ea48ed0362201054d8f19778056666b41c8c25e52eb60c21040ff61e0f220826ec67fad307300023102868b0922c652616f1c975e3eaf7943a24106a84a20b1bc13ec9840466406d2dd91e251053f3e5632b3d00008865dd54d49663f2270886e848a9e7ad8cd5036220101f05607ff9c8984f46ad97f8c9a94982210491a36e3d22085d84421884fdcc0023102171fef54b81e30c83a598a5e44f634c2410f02d088697509827565b46938fece21125101b43bbf9815e00001cb9b2a9f6b8a77c2708373e67d62e719c510362201080d89a58a2a41050918caf68a4e93c642104a319f5f12208883df2b8672930002310fa5d70f929ff298efb160413698dc1072410ae9a3d8ce70ce13bac297bdb91cd6c6825105c0dc2eeaefa0000396882a1fe2cf80b270865ab1cad216bfe87
 DVLR GSUP rx 511: 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
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000010650) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1884,7 +1884,7 @@
 - ...rand=4ac8d1cd1a51937597ca1016fe69a0fa
 - ...autn=2d837d2b0d6f00004b282d5acf23428d
 - ...expecting res=37527064741f8ddb
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   auth_request_sent == 1
   lu_result_sent == 0
@@ -1930,19 +1930,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000000156f00804032443f2
 DVLR GSUP rx 17: 10010809710000000156f00804032443f2
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000010650 has MSISDN:42342
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000000156f0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000000156f0
 DVLR GSUP rx 11: 06010809710000000156f0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -1956,7 +1956,7 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 - sending LU Accept for IMSI-901700000010650:MSISDN-42342
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + attached: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating in cascade, depth 2 (cause = OSMO_FSM_TERM_PARENT, caused by: upd_hlr_vlr_fsm(IMSI-901700000010650:GERAN-A-0:LU))
@@ -1968,11 +1968,11 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 4
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 4 (conn,vlr_gsupc_read_cb,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 - BSSAP Clear --GERAN-A--> MS
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated, including all deferred deallocations
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - vlr_gsupc_read_cb: now used by 2 (conn,attached)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
@@ -1987,7 +1987,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU)
 DRLL IMSI-901700000010650:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -2003,8 +2003,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000010650:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: rev=R99 net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -2017,7 +2017,7 @@
 - ...rand=b2661531b97b12c5a2edc21a0ed16fc5
 - ...autn=78cdd96c60840000322f421b3bb778b1
 - ...expecting res=ed3ebf9cb6ea48ed
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use - compl_l3 == 0 (0x0: )
@@ -2084,8 +2084,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
@@ -2098,17 +2098,17 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ)
 DRLL IMSI-901700000010650:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + test_gsm_ciph_in_umts_env: now used by 2 (attached,test_gsm_ciph_in_umts_env)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + SMS-receiver: now used by 3 (attached,test_gsm_ciph_in_umts_env,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000010650:MSISDN-42342 callref 40000003) New transaction
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + SMS: now used by 4 (attached,test_gsm_ciph_in_umts_env,SMS-receiver,SMS)
 DLSMS SMC(0) instance created for network
 DLSMS SMR(0) instance created for network.
 DLSMS SMR(0) message SM-RL-DATA_REQ received in state IDLE
@@ -2120,15 +2120,15 @@
 DMM Subscriber IMSI-901700000010650:MSISDN-42342 not paged yet, start paging.
   GERAN-A sends out paging request to IMSI 901700000010650, TMSI 0xffffffff, LAC 23
   strcmp(paging_expecting_imsi, imsi) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + Paging: now used by 5 (attached,test_gsm_ciph_in_umts_env,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - test_gsm_ciph_in_umts_env: now used by 4 (attached,SMS-receiver,SMS,Paging)
   paging_sent == 1
   paging_stopped == 0
 - the subscriber and its pending request should remain
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + test_gsm_ciph_in_umts_env: now used by 5 (attached,SMS-receiver,SMS,Paging,test_gsm_ciph_in_umts_env)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - test_gsm_ciph_in_umts_env: now used by 4 (attached,SMS-receiver,SMS,Paging)
 - MS replies with Paging Response, and VLR sends *UMTS AKA* Auth Request with third key
   MSC <--GERAN-A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
@@ -2141,8 +2141,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000010650:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: rev=R99 net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 5
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 6
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -2155,7 +2155,7 @@
 - ...rand=54d8f19778056666b41c8c25e52eb60c
 - ...autn=53f3e5632b3d00008865dd54d49663f2
 - ...expecting res=86e848a9e7ad8cd5
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use - compl_l3 == 0 (0x0: )
@@ -2223,15 +2223,15 @@
 DMSC msc_tx 91 bytes to IMSI-901700000010650:MSISDN-42342 via GERAN-A
 - DTAP --GERAN-A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + test_gsm_ciph_in_umts_env: now used by 5 (attached,SMS-receiver,SMS,conn,test_gsm_ciph_in_umts_env)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - test_gsm_ciph_in_umts_env: now used by 4 (attached,SMS-receiver,SMS,conn)
 - conn is still open to wait for SMS ack dance
   llist_count(&net->ran_conns) == 1
 - MS replies with CP-ACK for received SMS
@@ -2264,21 +2264,21 @@
 DLSMS SMR(0) RX SMS RP-ACK
 DLSMS SMR(0) new RP state WAIT_FOR_RP_ACK -> IDLE
 DLSMS RX SMS RP-ACK (MO)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - SMS-receiver: now used by 3 (attached,SMS,conn)
 DLSMS SMR(0) TX: MNSMS-REL-REQ
 DLSMS SMC(0) message MNSMS-REL-REQ received in state MM_ESTABLISHED
 DLSMS SMC(0) new CP state MM_ESTABLISHED -> IDLE
 DLSMS Got MMSMS_REL_REQ, destroying transaction.
 DLSMS SMR(0) clearing SMR instance
 DLSMS SMC(0) clearing instance
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
@@ -2292,7 +2292,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP)
 DRLL IMSI-901700000010650:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -2303,12 +2303,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000010650:MSISDN-42342
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 2
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650:MSISDN-42342
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -2343,12 +2343,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -2366,7 +2366,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -2374,7 +2374,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
   auth_request_sent == 1
@@ -2434,19 +2434,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804032443f2
 DVLR GSUP rx 17: 10010809710000004026f00804032443f2
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:42342
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-42342) VLR: update for IMSI=901700000004620 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-42342) VLR: update for IMSI=901700000004620 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -2460,7 +2460,7 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 - sending LU Accept for IMSI-901700000004620:MSISDN-42342
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + attached: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating in cascade, depth 2 (cause = OSMO_FSM_TERM_PARENT, caused by: upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU))
@@ -2472,11 +2472,11 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 4
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 4 (conn,vlr_gsupc_read_cb,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 - BSSAP Clear --GERAN-A--> MS
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated, including all deferred deallocations
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_gsupc_read_cb: now used by 2 (conn,attached)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
@@ -2491,7 +2491,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -2507,8 +2507,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -2520,7 +2520,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-42342: tuple use_count=1 key_seq=1 auth_types=0x1 and...
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - compl_l3 == 0 (0x0: )
@@ -2598,8 +2598,8 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
@@ -2612,17 +2612,17 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ)
 DRLL IMSI-901700000004620:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_a5_3_supported: now used by 2 (attached,test_a5_3_supported)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + SMS-receiver: now used by 3 (attached,test_a5_3_supported,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000004620:MSISDN-42342 callref 40000004) New transaction
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + SMS: now used by 4 (attached,test_a5_3_supported,SMS-receiver,SMS)
 DLSMS SMC(0) instance created for network
 DLSMS SMR(0) instance created for network.
 DLSMS SMR(0) message SM-RL-DATA_REQ received in state IDLE
@@ -2634,15 +2634,15 @@
 DMM Subscriber IMSI-901700000004620:MSISDN-42342 not paged yet, start paging.
   GERAN-A sends out paging request to IMSI 901700000004620, TMSI 0xffffffff, LAC 23
   strcmp(paging_expecting_imsi, imsi) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + Paging: now used by 5 (attached,test_a5_3_supported,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_a5_3_supported: now used by 4 (attached,SMS-receiver,SMS,Paging)
   paging_sent == 1
   paging_stopped == 0
 - the subscriber and its pending request should remain
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_a5_3_supported: now used by 5 (attached,SMS-receiver,SMS,Paging,test_a5_3_supported)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_a5_3_supported: now used by 4 (attached,SMS-receiver,SMS,Paging)
 - MS replies with Paging Response, and VLR sends Auth Request with third key
   MSC <--GERAN-A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
@@ -2655,8 +2655,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 6
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -2668,7 +2668,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-42342: tuple use_count=1 key_seq=2 auth_types=0x1 and...
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - compl_l3 == 0 (0x0: )
@@ -2747,15 +2747,15 @@
 DMSC msc_tx 91 bytes to IMSI-901700000004620:MSISDN-42342 via GERAN-A
 - DTAP --GERAN-A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_a5_3_supported: now used by 5 (attached,SMS-receiver,SMS,conn,test_a5_3_supported)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_a5_3_supported: now used by 4 (attached,SMS-receiver,SMS,conn)
 - conn is still open to wait for SMS ack dance
   llist_count(&net->ran_conns) == 1
 - MS replies with CP-ACK for received SMS
@@ -2788,21 +2788,21 @@
 DLSMS SMR(0) RX SMS RP-ACK
 DLSMS SMR(0) new RP state WAIT_FOR_RP_ACK -> IDLE
 DLSMS RX SMS RP-ACK (MO)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - SMS-receiver: now used by 3 (attached,SMS,conn)
 DLSMS SMR(0) TX: MNSMS-REL-REQ
 DLSMS SMC(0) message MNSMS-REL-REQ received in state MM_ESTABLISHED
 DLSMS SMC(0) new CP state MM_ESTABLISHED -> IDLE
 DLSMS Got MMSMS_REL_REQ, destroying transaction.
 DLSMS SMR(0) clearing SMR instance
 DLSMS SMC(0) clearing instance
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
@@ -2816,7 +2816,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP)
 DRLL IMSI-901700000004620:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -2827,12 +2827,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-42342
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-42342
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING
@@ -2867,12 +2867,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:LU)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: rev=GSM net=GERAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: Received Event VLR_ULA_E_UPDATE_LA
-DREF VLR subscr unknown usage increases to: 1
+DREF VLR subscr unknown + _lu_fsm_associate_vsub: now used by 1 (_lu_fsm_associate_vsub)
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR New subscr, IMSI: 901700000004620
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + conn: now used by 2 (_lu_fsm_associate_vsub,conn)
 DMM RAN_conn(IMSI-901700000004620:GERAN-A-0:LU){RAN_CONN_S_NEW}: Updated ID
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - _lu_fsm_associate_vsub: now used by 1 (conn)
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000004620:GERAN-A-0:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -2890,7 +2890,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
 DVLR GSUP rx 191: 0a010809710000004026f003222010585df1ae287f6e273dce07090d61320b21042d8b2c3e220861855fb81fc2a8000322201012aca96fb4ffdea5c985cbafa9b6e18b210420bde240220807fa7502e07e1c0003222010e7c03ba7cf0e2fde82b2dc4d63077d422104a29514ae2208e2b234f80788640003222010fa8f20b781b5881329d4fea26b1a3c5121045afc8d7222082392f14f709ae000032220100fd4cc8dbe8715d1f439e304edfd68dc2104bc8d1c5b2208da7cdd6bfe2d7000
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000004620) Received 5 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000004620:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -2898,7 +2898,7 @@
 - sending GSM Auth Request for IMSI-901700000004620: tuple use_count=1 key_seq=0 auth_types=0x1 and...
 - ...rand=585df1ae287f6e273dce07090d61320b
 - ...expecting sres=2d8b2c3e
-DREF VLR subscr IMSI-901700000004620 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
   auth_request_sent == 1
@@ -2958,19 +2958,19 @@
 - HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: 10010809710000004026f00804032443f2
 DVLR GSUP rx 17: 10010809710000004026f00804032443f2
-DREF VLR subscr IMSI-901700000004620 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR IMSI:901700000004620 has MSISDN:42342
-DVLR SUBSCR(IMSI-901700000004620:MSISDN-42342) VLR: update for IMSI=901700000004620 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000004620:MSISDN-42342) VLR: update for IMSI=901700000004620 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR GSUP tx: 12010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_INSERT_DATA_RESULT: 12010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_gsupc_read_cb: now used by 1 (conn)
 <-- GSUP rx OSMO_GSUP_MSGT_INSERT_DATA_REQUEST: vlr_gsupc_read_cb() returns 0
   lu_result_sent == 0
 - HLR also sends GSUP _UPDATE_LOCATION_RESULT
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: 06010809710000004026f0
 DVLR GSUP rx 11: 06010809710000004026f0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_gsupc_read_cb: now used by 2 (conn,vlr_gsupc_read_cb)
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -2984,7 +2984,7 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_INIT}: state_chg to LU_COMPL_VLR_S_WAIT_SUB_PRES
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 - sending LU Accept for IMSI-901700000004620:MSISDN-42342
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + attached: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating in cascade, depth 2 (cause = OSMO_FSM_TERM_PARENT, caused by: upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU))
@@ -2996,11 +2996,11 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 4
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 4 (conn,vlr_gsupc_read_cb,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 3 (conn,vlr_gsupc_read_cb,attached)
 - BSSAP Clear --GERAN-A--> MS
 DVLR upd_hlr_vlr_fsm(IMSI-901700000004620:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated, including all deferred deallocations
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_gsupc_read_cb: now used by 2 (conn,attached)
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
@@ -3015,7 +3015,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU)
 DRLL IMSI-901700000004620:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -3031,8 +3031,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -3044,7 +3044,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-42342: tuple use_count=1 key_seq=1 auth_types=0x1 and...
 - ...rand=12aca96fb4ffdea5c985cbafa9b6e18b
 - ...expecting sres=20bde240
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - compl_l3 == 0 (0x0: )
@@ -3122,8 +3122,8 @@
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
@@ -3136,17 +3136,17 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ)
 DRLL IMSI-901700000004620:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_cm_service_needs_classmark_update: now used by 2 (attached,test_cm_service_needs_classmark_update)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + SMS-receiver: now used by 3 (attached,test_cm_service_needs_classmark_update,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000004620:MSISDN-42342 callref 40000005) New transaction
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + SMS: now used by 4 (attached,test_cm_service_needs_classmark_update,SMS-receiver,SMS)
 DLSMS SMC(0) instance created for network
 DLSMS SMR(0) instance created for network.
 DLSMS SMR(0) message SM-RL-DATA_REQ received in state IDLE
@@ -3158,15 +3158,15 @@
 DMM Subscriber IMSI-901700000004620:MSISDN-42342 not paged yet, start paging.
   GERAN-A sends out paging request to IMSI 901700000004620, TMSI 0xffffffff, LAC 23
   strcmp(paging_expecting_imsi, imsi) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + Paging: now used by 5 (attached,test_cm_service_needs_classmark_update,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_cm_service_needs_classmark_update: now used by 4 (attached,SMS-receiver,SMS,Paging)
   paging_sent == 1
   paging_stopped == 0
 - the subscriber and its pending request should remain
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_cm_service_needs_classmark_update: now used by 5 (attached,SMS-receiver,SMS,Paging,test_cm_service_needs_classmark_update)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_cm_service_needs_classmark_update: now used by 4 (attached,SMS-receiver,SMS,Paging)
 - MS replies with Paging Response, and VLR sends Auth Request with third key
   MSC <--GERAN-A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
@@ -3179,8 +3179,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000004620:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: rev=GSM net=GERAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 6
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -3192,7 +3192,7 @@
 - sending GSM Auth Request for IMSI-901700000004620:MSISDN-42342: tuple use_count=1 key_seq=2 auth_types=0x1 and...
 - ...rand=e7c03ba7cf0e2fde82b2dc4d63077d42
 - ...expecting sres=a29514ae
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - compl_l3 == 0 (0x0: )
@@ -3201,8 +3201,8 @@
   auth_request_sent == 1
 ---
 - Fake a situation where Classmark 2 is unknown during proc_arq_fsm
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 6
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_cm_service_needs_classmark_update: now used by 6 (attached,SMS-receiver,SMS,Paging,conn,test_cm_service_needs_classmark_update)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_cm_service_needs_classmark_update: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 - MS sends Authen Response, VLR accepts and requests Ciphering
 - MS sends Authen Response, VLR accepts and requests Ciphering. Normally, we'd know Classmark 3, but this test removed it. Hence a Classmark Request is generated.
   MSC <--GERAN-A-- MS: GSM48_MT_MM_AUTH_RESP
@@ -3267,15 +3267,15 @@
 DMSC msc_tx 91 bytes to IMSI-901700000004620:MSISDN-42342 via GERAN-A
 - DTAP --GERAN-A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 5
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + test_cm_service_needs_classmark_update: now used by 5 (attached,SMS-receiver,SMS,conn,test_cm_service_needs_classmark_update)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 4
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - test_cm_service_needs_classmark_update: now used by 4 (attached,SMS-receiver,SMS,conn)
 - conn is still open to wait for SMS ack dance
   llist_count(&net->ran_conns) == 1
 - MS replies with CP-ACK for received SMS
@@ -3308,21 +3308,21 @@
 DLSMS SMR(0) RX SMS RP-ACK
 DLSMS SMR(0) new RP state WAIT_FOR_RP_ACK -> IDLE
 DLSMS RX SMS RP-ACK (MO)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 3
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - SMS-receiver: now used by 3 (attached,SMS,conn)
 DLSMS SMR(0) TX: MNSMS-REL-REQ
 DLSMS SMC(0) message MNSMS-REL-REQ received in state MM_ESTABLISHED
 DLSMS SMC(0) new CP state MM_ESTABLISHED -> IDLE
 DLSMS Got MMSMS_REL_REQ, destroying transaction.
 DLSMS SMR(0) clearing SMR instance
 DLSMS SMC(0) clearing instance
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000004620:MSISDN-42342: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
@@ -3336,7 +3336,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP)
 DRLL IMSI-901700000004620:MSISDN-42342: Freeing RAN connection
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000004620:MSISDN-42342:GERAN-A-0:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
 ---
@@ -3347,12 +3347,12 @@
 DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 2
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + gsm48_rx_mm_imsi_detach_ind: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
 DMM IMSI DETACH for IMSI-901700000004620:MSISDN-42342
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage increases to: 3
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 2
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 1
-DREF VLR subscr IMSI-901700000004620:MSISDN-42342 usage decreases to: 0
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,gsm48_rx_mm_imsi_detach_ind,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000004620:MSISDN-42342 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000004620:MSISDN-42342
 DMM RAN_conn{RAN_CONN_S_NEW}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn{RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_RELEASING