diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.err b/tests/msc_vlr/msc_vlr_test_umts_authen.err
index 3f0e916..b0ed61f 100644
--- a/tests/msc_vlr/msc_vlr_test_umts_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.err
@@ -15,12 +15,12 @@
 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 (no 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
@@ -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: 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
 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
@@ -47,7 +47,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -83,19 +83,19 @@
 - 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
@@ -109,12 +109,12 @@
 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
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: lu_compl_vlr_new_tmsi()
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 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_WAIT_TMSI_CNF
 - sending LU Accept for IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100, with TMSI 0x03020100
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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
   lu_result_sent == 1
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -130,12 +130,12 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 + _test_umts_authen: now used by 2 (conn,_test_umts_authen)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0x03020100
   vsub->tmsi == 0xffffffff
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 - _test_umts_authen: now used by 1 (conn)
 - MS sends TMSI Realloc Complete
   MSC <--GERAN-A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100: MSC conn use + dtap == 1 (0x2: dtap)
@@ -143,9 +143,9 @@
 DMM TMSI Reallocation Completed. Subscriber: IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=1)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + attached: now used by 2 (conn,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -157,8 +157,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (conn,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (conn,attached)
 - BSSAP Clear --GERAN-A--> MS
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
@@ -172,7 +172,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - LU was successful, and the conn has already been closed
   llist_count(&net->ran_conns) == 0
@@ -189,8 +189,8 @@
 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 (no 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:TMSI-0x03020100 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: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:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -203,7 +203,7 @@
 - ...rand=c187a53a5e6b9d573cac7c74451fd46d
 - ...autn=1843a645b98d00005b2d666af46c45d9
 - ...expecting res=7db47cf7f81e4dc7
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: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:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - compl_l3 == 0 (0x0: )
@@ -257,8 +257,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - BSSAP Clear --GERAN-A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
@@ -270,18 +270,18 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - all requests serviced, conn has been released
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + _test_umts_authen: now used by 2 (attached,_test_umts_authen)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + SMS-receiver: now used by 3 (attached,_test_umts_authen,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 callref 40000001) New transaction
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + SMS: now used by 4 (attached,_test_umts_authen,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
@@ -293,15 +293,15 @@
 DMM Subscriber IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 not paged yet, start paging.
   GERAN-A sends out paging request to IMSI 901700000010650, TMSI 0x03020100, LAC 23
   strcmp(paging_expecting_imsi, imsi) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + Paging: now used by 5 (attached,_test_umts_authen,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - _test_umts_authen: 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:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + _test_umts_authen: now used by 5 (attached,SMS-receiver,SMS,Paging,_test_umts_authen)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - _test_umts_authen: 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
@@ -314,8 +314,8 @@
 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 (no 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:TMSI-0x03020100 usage increases to: 5
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 6
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -328,7 +328,7 @@
 - ...rand=efa9c29a9742148d5c9070348716e1bb
 - ...autn=f9375e6d41e1000096e7fe4ff1c27e39
 - ...expecting res=706f996719ba609c
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - compl_l3 == 0 (0x0: )
@@ -381,7 +381,7 @@
 DMSC msc_tx 91 bytes to IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 via GERAN-A
 - DTAP --GERAN-A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
 DVLR VLR_Authenticate(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){VLR_SUB_AS_AUTHENTICATED}: Deallocated
@@ -389,9 +389,9 @@
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + _test_umts_authen: now used by 5 (attached,SMS-receiver,SMS,conn,_test_umts_authen)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - _test_umts_authen: 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
@@ -424,21 +424,21 @@
 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:TMSI-0x03020100 usage decreases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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
@@ -451,7 +451,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - SMS is done, conn is gone
   llist_count(&net->ran_conns) == 0
@@ -463,12 +463,12 @@
 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:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + 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:TMSI-0x03020100
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650:MSISDN-42342: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
@@ -503,12 +503,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: rev=R99 net=UTRAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42: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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -526,7 +526,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e4103622010c187a53a5e6b9d573cac7c74451fd46d210485aa31302208d3d50a000bf04f6e23101159ec926a50e98c034a6b7d7c9f418d2410df3a03d9ca5335641efc8e36d76cd20b25101843a645b98d00005b2d666af46c45d927087db47cf7f81e4dc703622010efa9c29a9742148d5c9070348716e1bb210469d5f9fb22083df176f0c29f1a3d2310eb50e770ddcc3060101d2f43b6c2b884241076542abce5ff9345b0e8947f4c6e019c2510f9375e6d41e1000096e7fe4ff1c27e392708706f996719ba609c03622010f023d5a3b24726e0631b64b3840f82532104d570c03f2208ec011be8919883d62310c4e58af4ba43f3bcd904e16984f086d724100593f65e752e5cb7f473862bda05aa0a2510541ff1f077270000c5ea00d658bc7e9a27083fd26072eaa2a04d036220102f8f90c780d6a9c0c53da7ac57b6707e2104b072446f220823f39f9f425ad6e6231065af0527fda95b0dc5ae4aa515cdf32f2410537c3b35a3b13b08d08eeb28098f45cc25104bf4e564f75300009bc796706bc6574427080edb0eadbea94ac2
 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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -535,7 +535,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -583,19 +583,19 @@
 - 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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -609,12 +609,12 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: lu_compl_vlr_new_tmsi()
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100, with TMSI 0x03020100
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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
   lu_result_sent == 1
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -630,12 +630,12 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 + _test_umts_authen: now used by 2 (conn,_test_umts_authen)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0x03020100
   vsub->tmsi == 0xffffffff
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 - _test_umts_authen: now used by 1 (conn)
 - MS sends TMSI Realloc Complete
   MSC <--UTRAN-Iu-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100: MSC conn use + dtap == 1 (0x2: dtap)
@@ -643,9 +643,9 @@
 DMM TMSI Reallocation Completed. Subscriber: IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=1)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + attached: now used by 2 (conn,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -657,8 +657,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (conn,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (conn,attached)
 - Iu Release --UTRAN-Iu--> MS
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
@@ -672,7 +672,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - LU was successful, and the conn has already been closed
   llist_count(&net->ran_conns) == 0
@@ -689,8 +689,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_INIT}: rev=R99 net=UTRAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + proc_arq_vlr_fn_init: now used by 2 (attached,proc_arq_vlr_fn_init)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + conn: now used by 3 (attached,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -703,7 +703,7 @@
 - ...rand=c187a53a5e6b9d573cac7c74451fd46d
 - ...autn=1843a645b98d00005b2d666af46c45d9
 - ...expecting res=7db47cf7f81e4dc7
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - proc_arq_vlr_fn_init: now used by 2 (attached,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - compl_l3 == 0 (0x0: )
@@ -770,8 +770,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - Iu Release --UTRAN-Iu--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
@@ -783,18 +783,18 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:CM_SERVICE_REQ){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - all requests serviced, conn has been released
   llist_count(&net->ran_conns) == 0
 ---
 - an SMS is sent, MS is paged
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + _test_umts_authen: now used by 2 (attached,_test_umts_authen)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + SMS-receiver: now used by 3 (attached,_test_umts_authen,SMS-receiver)
 DLSMS Going to send a MT SMS
 DCC (ti 00 sub IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 callref 40000002) New transaction
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + SMS: now used by 4 (attached,_test_umts_authen,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
@@ -806,15 +806,15 @@
 DMM Subscriber IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 not paged yet, start paging.
   UTRAN-Iu sends out paging request to IMSI 901700000010650, TMSI 0x03020100, LAC 23
   strcmp(paging_expecting_imsi, imsi) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + Paging: now used by 5 (attached,_test_umts_authen,SMS-receiver,SMS,Paging)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - _test_umts_authen: 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:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + _test_umts_authen: now used by 5 (attached,SMS-receiver,SMS,Paging,_test_umts_authen)
   llist_count(&vsub->cs.requests) == 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - _test_umts_authen: now used by 4 (attached,SMS-receiver,SMS,Paging)
 - MS replies with Paging Response, and VLR sends Auth Request with third key
   MSC <--UTRAN-Iu-- MS: GSM48_MT_RR_PAG_RESP
   new conn
@@ -827,8 +827,8 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_INIT}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_INIT}: rev=R99 net=UTRAN Auth+Ciph
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_INIT}: Received Event PR_ARQ_E_START
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 5
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 6
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100 + conn: now used by 6 (attached,SMS-receiver,SMS,Paging,proc_arq_vlr_fn_init,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_NEW}: Updated ID
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_INIT}: proc_arq_vlr_fn_post_imsi()
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_INIT}: state_chg to PR_ARQ_S_WAIT_AUTH
@@ -841,7 +841,7 @@
 - ...rand=efa9c29a9742148d5c9070348716e1bb
 - ...autn=f9375e6d41e1000096e7fe4ff1c27e39
 - ...expecting res=706f996719ba609c
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - proc_arq_vlr_fn_init: now used by 5 (attached,SMS-receiver,SMS,Paging,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_NEW}: Received Event RAN_CONN_E_COMPLETE_LAYER_3
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_NEW}: state_chg to RAN_CONN_S_AUTH_CIPH
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - compl_l3 == 0 (0x0: )
@@ -910,14 +910,14 @@
 DMSC msc_tx 91 bytes to IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 via UTRAN-Iu
 - DTAP --UTRAN-Iu--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - Paging: now used by 4 (attached,SMS-receiver,SMS,conn)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_ACCEPTED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_ACCEPTED}: ran_conn_fsm_has_active_transactions: connection still has active transaction: SMS
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 5
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + _test_umts_authen: now used by 5 (attached,SMS-receiver,SMS,conn,_test_umts_authen)
   llist_count(&vsub->cs.requests) == 0
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 4
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - _test_umts_authen: 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
@@ -950,21 +950,21 @@
 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:TMSI-0x03020100 usage decreases to: 3
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - SMS: now used by 2 (attached,conn)
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - trans_sms == 1 (0x2: dtap)
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - dtap == 0 (0x0: )
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_COMMUNICATING}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 1 (0x100: release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (attached,conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,conn)
 - Iu Release --UTRAN-Iu--> MS
   dtap_tx_confirmed == 1
   iu_release_sent == 1
@@ -977,7 +977,7 @@
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_DONE}: Removing from parent RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP)
 DVLR Process_Access_Request_VLR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){PR_ARQ_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:PAGING_RESP){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - SMS is done, conn is gone
   llist_count(&net->ran_conns) == 0
@@ -989,12 +989,12 @@
 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:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + 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:TMSI-0x03020100
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (attached,gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - attached: now used by 1 (gsm48_rx_mm_imsi_detach_ind)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - gsm48_rx_mm_imsi_detach_ind: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650:MSISDN-42342: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
@@ -1029,12 +1029,12 @@
 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 (no 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
@@ -1052,7 +1052,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e41
 DVLR GSUP rx 111: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e41
-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 1 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
@@ -1061,7 +1061,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1083,7 +1083,7 @@
 - HLR replies with new tuples
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f0036220100f1feb1623e1bf626334e37ec448ac182104efde99da220814778c855c52373023108a90c769b7272f3bb7a1c1fbb1ea9349241043ffc1cf8c89a7fd6ab94bd8d6162cbf251002a83f62e9470000660d51afc75f169d27081df5f0b4f22b696e03622010ac21d34937b4e1142a2c757af294931921047818bfdc2208d175571f41f314a42310ff8edbceb6dd24799c77c3b9a6790c102410157c39022ca9d885a7f0766a7dfee44825108a43b91898e500002cf354c6f5d1f8c32708f748a7078f5018db
 DVLR GSUP rx 211: 0a010809710000000156f0036220100f1feb1623e1bf626334e37ec448ac182104efde99da220814778c855c52373023108a90c769b7272f3bb7a1c1fbb1ea9349241043ffc1cf8c89a7fd6ab94bd8d6162cbf251002a83f62e9470000660d51afc75f169d27081df5f0b4f22b696e03622010ac21d34937b4e1142a2c757af294931921047818bfdc2208d175571f41f314a42310ff8edbceb6dd24799c77c3b9a6790c102410157c39022ca9d885a7f0766a7dfee44825108a43b91898e500002cf354c6f5d1f8c32708f748a7078f5018db
-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_SAI_RESYNC}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000010650) Received 2 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC}: state_chg to VLR_SUB_AS_WAIT_RESP_RESYNC
@@ -1092,7 +1092,7 @@
 - ...rand=0f1feb1623e1bf626334e37ec448ac18
 - ...autn=02a83f62e9470000660d51afc75f169d
 - ...expecting res=1df5f0b4f22b696e
-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
@@ -1128,19 +1128,19 @@
 - 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
@@ -1154,12 +1154,12 @@
 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
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: lu_compl_vlr_new_tmsi()
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 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_WAIT_TMSI_CNF
 - sending LU Accept for IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100, with TMSI 0x03020100
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:GERAN-A-0:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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
   lu_result_sent == 1
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -1175,12 +1175,12 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 + _test_umts_authen_resync: now used by 2 (conn,_test_umts_authen_resync)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0x03020100
   vsub->tmsi == 0xffffffff
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 - _test_umts_authen_resync: now used by 1 (conn)
 - MS sends TMSI Realloc Complete
   MSC <--GERAN-A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100: MSC conn use + dtap == 1 (0x2: dtap)
@@ -1188,9 +1188,9 @@
 DMM TMSI Reallocation Completed. Subscriber: IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=1)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + attached: now used by 2 (conn,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:GERAN-A-0:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1202,8 +1202,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (conn,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (conn,attached)
 - BSSAP Clear --GERAN-A--> MS
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
@@ -1217,7 +1217,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - LU was successful, and the conn has already been closed
   llist_count(&net->ran_conns) == 0
@@ -1241,12 +1241,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: rev=R99 net=UTRAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42: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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1264,7 +1264,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e41
 DVLR GSUP rx 111: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e41
-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:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000010650) Received 1 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1273,7 +1273,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1295,7 +1295,7 @@
 - HLR replies with new tuples
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f0036220100f1feb1623e1bf626334e37ec448ac182104efde99da220814778c855c52373023108a90c769b7272f3bb7a1c1fbb1ea9349241043ffc1cf8c89a7fd6ab94bd8d6162cbf251002a83f62e9470000660d51afc75f169d27081df5f0b4f22b696e03622010ac21d34937b4e1142a2c757af294931921047818bfdc2208d175571f41f314a42310ff8edbceb6dd24799c77c3b9a6790c102410157c39022ca9d885a7f0766a7dfee44825108a43b91898e500002cf354c6f5d1f8c32708f748a7078f5018db
 DVLR GSUP rx 211: 0a010809710000000156f0036220100f1feb1623e1bf626334e37ec448ac182104efde99da220814778c855c52373023108a90c769b7272f3bb7a1c1fbb1ea9349241043ffc1cf8c89a7fd6ab94bd8d6162cbf251002a83f62e9470000660d51afc75f169d27081df5f0b4f22b696e03622010ac21d34937b4e1142a2c757af294931921047818bfdc2208d175571f41f314a42310ff8edbceb6dd24799c77c3b9a6790c102410157c39022ca9d885a7f0766a7dfee44825108a43b91898e500002cf354c6f5d1f8c32708f748a7078f5018db
-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:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC}: Received Event VLR_AUTH_E_HLR_SAI_ACK
 DVLR SUBSCR(IMSI-901700000010650) Received 2 auth tuples
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC}: state_chg to VLR_SUB_AS_WAIT_RESP_RESYNC
@@ -1304,7 +1304,7 @@
 - ...rand=0f1feb1623e1bf626334e37ec448ac18
 - ...autn=02a83f62e9470000660d51afc75f169d
 - ...expecting res=1df5f0b4f22b696e
-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
@@ -1352,19 +1352,19 @@
 - 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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_WAIT_HLR_UPD}: Received Event VLR_ULA_E_HLR_LU_RES
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: Received Event UPD_HLR_VLR_E_UPD_LOC_ACK
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){UPD_HLR_VLR_S_WAIT_FOR_DATA}: state_chg to UPD_HLR_VLR_S_DONE
@@ -1378,12 +1378,12 @@
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: lu_compl_vlr_new_tmsi()
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=2)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100, with TMSI 0x03020100
 DVLR upd_hlr_vlr_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){UPD_HLR_VLR_S_DONE}: Deallocated
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342: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
   lu_result_sent == 1
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -1399,12 +1399,12 @@
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DRLL subscr IMSI-901700000010650:MSISDN-42342: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-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 + _test_umts_authen_resync: now used by 2 (conn,_test_umts_authen_resync)
   vsub != NULL == 1
   strcmp(vsub->imsi, imsi) == 0
   vsub->tmsi_new == 0x03020100
   vsub->tmsi == 0xffffffff
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100 - _test_umts_authen_resync: now used by 1 (conn)
 - MS sends TMSI Realloc Complete
   MSC <--UTRAN-Iu-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100: MSC conn use + dtap == 1 (0x2: dtap)
@@ -1412,9 +1412,9 @@
 DMM TMSI Reallocation Completed. Subscriber: IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSInew-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
-DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342, used=1)
+DVLR SUBSCR(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100) VLR: update for IMSI=901700000010650 (MSISDN=42342)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Updated ID
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + attached: now used by 2 (conn,attached)
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: state_chg to LU_COMPL_VLR_S_DONE
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_LU_COMPL_SUCCESS
 DVLR lu_compl_vlr_fsm(IMSI-901700000010650:MSISDN-42342:UTRAN-Iu-42:LU){LU_COMPL_VLR_S_DONE}: Terminating (cause = OSMO_FSM_TERM_PARENT)
@@ -1426,8 +1426,8 @@
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_ACCEPTED}: Received Event RAN_CONN_E_UNUSED
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_ACCEPTED}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage increases to: 3
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 2
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 + vlr_subscr_cancel_attach_fsm: now used by 3 (conn,attached,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - vlr_subscr_cancel_attach_fsm: now used by 2 (conn,attached)
 - Iu Release --UTRAN-Iu--> MS
 DREF IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
@@ -1441,7 +1441,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU)
 DRLL IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100 - conn: now used by 1 (attached)
 DMM RAN_conn(IMSI-901700000010650:MSISDN-42342:TMSI-0x03020100:UTRAN-Iu-42:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
 - LU was successful, and the conn has already been closed
   llist_count(&net->ran_conns) == 0
@@ -1465,12 +1465,12 @@
 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 (no 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
@@ -1488,7 +1488,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 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
 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
@@ -1497,7 +1497,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1521,8 +1521,8 @@
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 + vlr_subscr_cancel_attach_fsm: now used by 2 (conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650 - vlr_subscr_cancel_attach_fsm: now used by 1 (conn)
 - BSSAP Clear --GERAN-A--> MS
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_AUTH_FAILED}: Deallocated
 DREF IMSI-901700000010650: MSC conn use - dtap == 1 (0x100: release)
@@ -1538,7 +1538,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:GERAN-A-0:LU)
 DRLL IMSI-901700000010650: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650 - conn: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
@@ -1561,12 +1561,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: rev=R99 net=UTRAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42: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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1584,7 +1584,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e4103622010c187a53a5e6b9d573cac7c74451fd46d210485aa31302208d3d50a000bf04f6e23101159ec926a50e98c034a6b7d7c9f418d2410df3a03d9ca5335641efc8e36d76cd20b25101843a645b98d00005b2d666af46c45d927087db47cf7f81e4dc703622010efa9c29a9742148d5c9070348716e1bb210469d5f9fb22083df176f0c29f1a3d2310eb50e770ddcc3060101d2f43b6c2b884241076542abce5ff9345b0e8947f4c6e019c2510f9375e6d41e1000096e7fe4ff1c27e392708706f996719ba609c03622010f023d5a3b24726e0631b64b3840f82532104d570c03f2208ec011be8919883d62310c4e58af4ba43f3bcd904e16984f086d724100593f65e752e5cb7f473862bda05aa0a2510541ff1f077270000c5ea00d658bc7e9a27083fd26072eaa2a04d036220102f8f90c780d6a9c0c53da7ac57b6707e2104b072446f220823f39f9f425ad6e6231065af0527fda95b0dc5ae4aa515cdf32f2410537c3b35a3b13b08d08eeb28098f45cc25104bf4e564f75300009bc796706bc6574427080edb0eadbea94ac2
 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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1593,7 +1593,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1617,8 +1617,8 @@
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 + vlr_subscr_cancel_attach_fsm: now used by 2 (conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650 - vlr_subscr_cancel_attach_fsm: now used by 1 (conn)
 - Iu Release --UTRAN-Iu--> MS
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_AUTH_FAILED}: Deallocated
 DREF IMSI-901700000010650: MSC conn use - dtap == 1 (0x100: release)
@@ -1634,7 +1634,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DRLL IMSI-901700000010650: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650 - conn: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
@@ -1657,12 +1657,12 @@
 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 (no 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
@@ -1680,7 +1680,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 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
 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
@@ -1689,7 +1689,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1713,8 +1713,8 @@
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 + vlr_subscr_cancel_attach_fsm: now used by 2 (conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650 - vlr_subscr_cancel_attach_fsm: now used by 1 (conn)
 - BSSAP Clear --GERAN-A--> MS
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_AUTH_FAILED}: Deallocated
 DREF IMSI-901700000010650: MSC conn use - dtap == 1 (0x100: release)
@@ -1730,7 +1730,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:GERAN-A-0:LU)
 DRLL IMSI-901700000010650: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650 - conn: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
@@ -1753,12 +1753,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: rev=R99 net=UTRAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42: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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1776,7 +1776,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 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
 DVLR GSUP rx 511: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e4103622010c187a53a5e6b9d573cac7c74451fd46d210485aa31302208d3d50a000bf04f6e23101159ec926a50e98c034a6b7d7c9f418d2410df3a03d9ca5335641efc8e36d76cd20b25101843a645b98d00005b2d666af46c45d927087db47cf7f81e4dc703622010efa9c29a9742148d5c9070348716e1bb210469d5f9fb22083df176f0c29f1a3d2310eb50e770ddcc3060101d2f43b6c2b884241076542abce5ff9345b0e8947f4c6e019c2510f9375e6d41e1000096e7fe4ff1c27e392708706f996719ba609c03622010f023d5a3b24726e0631b64b3840f82532104d570c03f2208ec011be8919883d62310c4e58af4ba43f3bcd904e16984f086d724100593f65e752e5cb7f473862bda05aa0a2510541ff1f077270000c5ea00d658bc7e9a27083fd26072eaa2a04d036220102f8f90c780d6a9c0c53da7ac57b6707e2104b072446f220823f39f9f425ad6e6231065af0527fda95b0dc5ae4aa515cdf32f2410537c3b35a3b13b08d08eeb28098f45cc25104bf4e564f75300009bc796706bc6574427080edb0eadbea94ac2
-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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1785,7 +1785,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1809,8 +1809,8 @@
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 + vlr_subscr_cancel_attach_fsm: now used by 2 (conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650 - vlr_subscr_cancel_attach_fsm: now used by 1 (conn)
 - Iu Release --UTRAN-Iu--> MS
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_AUTH_FAILED}: Deallocated
 DREF IMSI-901700000010650: MSC conn use - dtap == 1 (0x100: release)
@@ -1826,7 +1826,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DRLL IMSI-901700000010650: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650 - conn: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
@@ -1849,12 +1849,12 @@
 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 (no 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
@@ -1872,7 +1872,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 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
 DVLR GSUP rx 511: 0a010809710000000156f00362201039fa2f4e3d523d8619a73b4f65c3e14d21049b36efdf2208059a4f668f6fbe39231027497388b6cb044648f396aa155b95ef2410f64735036e5871319c679f4742a75ea125108704f5ba55f30000d2ee44b22c8ea9192708e229c19e791f2e4103622010c187a53a5e6b9d573cac7c74451fd46d210485aa31302208d3d50a000bf04f6e23101159ec926a50e98c034a6b7d7c9f418d2410df3a03d9ca5335641efc8e36d76cd20b25101843a645b98d00005b2d666af46c45d927087db47cf7f81e4dc703622010efa9c29a9742148d5c9070348716e1bb210469d5f9fb22083df176f0c29f1a3d2310eb50e770ddcc3060101d2f43b6c2b884241076542abce5ff9345b0e8947f4c6e019c2510f9375e6d41e1000096e7fe4ff1c27e392708706f996719ba609c03622010f023d5a3b24726e0631b64b3840f82532104d570c03f2208ec011be8919883d62310c4e58af4ba43f3bcd904e16984f086d724100593f65e752e5cb7f473862bda05aa0a2510541ff1f077270000c5ea00d658bc7e9a27083fd26072eaa2a04d036220102f8f90c780d6a9c0c53da7ac57b6707e2104b072446f220823f39f9f425ad6e6231065af0527fda95b0dc5ae4aa515cdf32f2410537c3b35a3b13b08d08eeb28098f45cc25104bf4e564f75300009bc796706bc6574427080edb0eadbea94ac2
-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
@@ -1881,7 +1881,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -1905,8 +1905,8 @@
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 + vlr_subscr_cancel_attach_fsm: now used by 2 (conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650 - vlr_subscr_cancel_attach_fsm: now used by 1 (conn)
 - BSSAP Clear --GERAN-A--> MS
 DVLR VLR_Authenticate(IMSI-901700000010650:GERAN-A-0:LU){VLR_SUB_AS_AUTH_FAILED}: Deallocated
 DREF IMSI-901700000010650: MSC conn use - dtap == 1 (0x100: release)
@@ -1922,7 +1922,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:GERAN-A-0:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:GERAN-A-0:LU)
 DRLL IMSI-901700000010650: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650 - conn: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650
 DMM RAN_conn(IMSI-901700000010650:GERAN-A-0:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0
@@ -1945,12 +1945,12 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: is child of RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: rev=R99 net=UTRAN Auth+Ciph
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42: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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: vlr_loc_upd_node1()
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_AUTH
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH}: Allocated
@@ -1968,7 +1968,7 @@
 - from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS
 <-- GSUP rx OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT: 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
 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:UTRAN-Iu-42: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:UTRAN-Iu-42:LU){VLR_SUB_AS_NEEDS_AUTH_WAIT_AI}: state_chg to VLR_SUB_AS_WAIT_RESP
@@ -1977,7 +1977,7 @@
 - ...rand=39fa2f4e3d523d8619a73b4f65c3e14d
 - ...autn=8704f5ba55f30000d2ee44b22c8ea919
 - ...expecting res=e229c19e791f2e41
-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
@@ -2001,8 +2001,8 @@
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: Received Event RAN_CONN_E_CN_CLOSE
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_AUTH_CIPH}: state_chg to RAN_CONN_S_RELEASING
 DREF IMSI-901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
-DREF VLR subscr IMSI-901700000010650 usage increases to: 2
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 1
+DREF VLR subscr IMSI-901700000010650 + vlr_subscr_cancel_attach_fsm: now used by 2 (conn,vlr_subscr_cancel_attach_fsm)
+DREF VLR subscr IMSI-901700000010650 - vlr_subscr_cancel_attach_fsm: now used by 1 (conn)
 - Iu Release --UTRAN-Iu--> MS
 DVLR VLR_Authenticate(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_SUB_AS_AUTH_FAILED}: Deallocated
 DREF IMSI-901700000010650: MSC conn use - dtap == 1 (0x100: release)
@@ -2018,7 +2018,7 @@
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: fsm_lu_cleanup called with cause OSMO_FSM_TERM_PARENT
 DVLR vlr_lu_fsm(IMSI-901700000010650:UTRAN-Iu-42:LU){VLR_ULA_S_DONE}: Deferring: will deallocate with RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU)
 DRLL IMSI-901700000010650: Freeing RAN connection
-DREF VLR subscr IMSI-901700000010650 usage decreases to: 0
+DREF VLR subscr IMSI-901700000010650 - conn: now used by 0 (-)
 DREF freeing VLR subscr IMSI-901700000010650
 DMM RAN_conn(IMSI-901700000010650:UTRAN-Iu-42:LU){RAN_CONN_S_RELEASED}: Deallocated, including all deferred deallocations
   llist_count(&net->ran_conns) == 0