Execution Chart

Sorry, for this execution, no execution chart could be reported.

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r044-tall-174854029200862.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2025-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-5832
Executing tool itstools
Input is DatabaseWithMutex-PT-40, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r044-tall-174854029200862
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 60M
-rw-r--r-- 1 mcc users 1.7M May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 6.9M May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 478K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 2.2M May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 29 14:32 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.7K May 29 14:32 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 689K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 2.0M May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 776K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 2.8M May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.8M May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 7.2M May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.0M May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 14M May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 166K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 366K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 29 14:32 equiv_col
-rw-r--r-- 1 mcc users 3 May 29 14:32 instance
-rw-r--r-- 1 mcc users 6 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 17M May 29 14:32 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-00
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-01
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-02
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-03
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-04
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-05
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-06
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-07
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-08
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-09
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-10
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-11
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-12
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-13
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-14
FORMULA_NAME DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-15

=== Now, execution of the tool begins

BK_START 1748680406327

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=DatabaseWithMutex-PT-40
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
ReachabilityCardinality PT
Running Version 202505121319
[2025-05-31 08:33:27] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2025-05-31 08:33:27] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2025-05-31 08:33:28] [INFO ] Load time of PNML (sax parser for PT used): 1009 ms
[2025-05-31 08:33:28] [INFO ] Transformed 12920 places.
[2025-05-31 08:33:28] [INFO ] Transformed 12800 transitions.
[2025-05-31 08:33:28] [INFO ] Found NUPN structural information;
[2025-05-31 08:33:28] [INFO ] Parsed PT model containing 12920 places and 12800 transitions and 156800 arcs in 1331 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 159 ms.
Working with output stream class java.io.PrintStream
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-08 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2025-05-31 08:33:33] [INFO ] Flatten gal took : 2753 ms
[2025-05-31 08:33:35] [INFO ] Flatten gal took : 2085 ms
[2025-05-31 08:33:36] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality4120497768258806836.gal : 400 ms
[2025-05-31 08:33:36] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality2272748380831340424.prop : 164 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality4120497768258806836.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality2272748380831340424.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...328
RANDOM walk for 40000 steps (8 resets) in 44317 ms. (0 steps per ms) remains 5/14 properties
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-14 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-13 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-02 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-00 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (8 resets) in 1357 ms. (29 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 6119 ms. (6 steps per ms) remains 5/5 properties
Loading property file /tmp/ReachabilityCardinality2272748380831340424.prop.
BEST_FIRST walk for 38984 steps (8 resets) in 20530 ms. (1 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 19382 ms. (2 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 183 ms. (217 steps per ms) remains 5/5 properties
// Phase 1: matrix 12800 rows 12920 cols
[2025-05-31 08:33:54] [INFO ] Computed 1720 invariants in 786 ms
Excessive predecessor constraint size, skipping predecessor.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/12920 variables, 12920/12920 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/12920 variables, 84/13004 constraints. Problems are: Problem set: 0 solved, 5 unsolved
SMT process timed out in 6103ms, After SMT, problems are : Problem set: 0 solved, 5 unsolved
Fused 5 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 12920 out of 12920 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 12920/12920 places, 12800/12800 transitions.
Applied a total of 0 rules in 744 ms. Remains 12920 /12920 variables (removed 0) and now considering 12800/12800 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 756 ms. Remains : 12920/12920 places, 12800/12800 transitions.
RANDOM walk for 40000 steps (8 resets) in 35640 ms. (1 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 1246 ms. (32 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 5874 ms. (6 steps per ms) remains 5/5 properties
BEST_FIRST walk for 29873 steps (4 resets) in 21038 ms. (1 steps per ms) remains 5/5 properties
BEST_FIRST walk for 31475 steps (5 resets) in 21138 ms. (1 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 207 ms. (192 steps per ms) remains 5/5 properties
Interrupted probabilistic random walk after 269140 steps, run timeout after 66022 ms. (steps per millisecond=4 ) properties seen :0 out of 5
Probabilistic random walk after 269140 steps, saw 268173 distinct states, run finished after 66032 ms. (steps per millisecond=4 ) properties seen :0
[2025-05-31 08:35:28] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/12920 variables, 12920/12920 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/12920 variables, 84/13004 constraints. Problems are: Problem set: 0 solved, 5 unsolved
Problem DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-06 is UNSAT
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-06 TRUE TECHNIQUES SMT_REFINEMENT
Solver is answering 'unknown', stopping.
Problem DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-01 is UNSAT
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-01 FALSE TECHNIQUES SMT_REFINEMENT
After SMT solving in domain Real declared 12920/25720 variables, and 14640 constraints, problems are : Problem set: 1 solved, 4 unsolved in 36470 ms.
Refiners :[Domain max(s): 12920/12920 constraints, Positive P Invariants (semi-flows): 84/84 constraints, Generalized P Invariants (flows): 1636/1636 constraints, State Equation: 0/12920 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 1 solved, 4 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/12920 variables, 12920/12920 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/12920 variables, 84/13004 constraints. Problems are: Problem set: 2 solved, 3 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 12920/25720 variables, and 14640 constraints, problems are : Problem set: 2 solved, 3 unsolved in 45046 ms.
Refiners :[Domain max(s): 12920/12920 constraints, Positive P Invariants (semi-flows): 84/84 constraints, Generalized P Invariants (flows): 1636/1636 constraints, State Equation: 0/12920 constraints, PredecessorRefiner: 0/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 81772ms problems are : Problem set: 2 solved, 3 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 12920 out of 12920 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 12920/12920 places, 12800/12800 transitions.
Applied a total of 0 rules in 391 ms. Remains 12920 /12920 variables (removed 0) and now considering 12800/12800 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 391 ms. Remains : 12920/12920 places, 12800/12800 transitions.
RANDOM walk for 40000 steps (8 resets) in 21884 ms. (1 steps per ms) remains 3/3 properties
BEST_FIRST walk for 40004 steps (8 resets) in 5979 ms. (6 steps per ms) remains 3/3 properties
BEST_FIRST walk for 38384 steps (8 resets) in 19967 ms. (1 steps per ms) remains 3/3 properties
BEST_FIRST walk for 40004 steps (8 resets) in 100 ms. (396 steps per ms) remains 3/3 properties
Interrupted probabilistic random walk after 261581 steps, run timeout after 36053 ms. (steps per millisecond=7 ) properties seen :0 out of 3
Probabilistic random walk after 261581 steps, saw 260643 distinct states, run finished after 36059 ms. (steps per millisecond=7 ) properties seen :0
[2025-05-31 08:37:39] [INFO ] Invariant cache hit.
Starting Z3 with timeout 75.0 s and query timeout 7500.0 ms
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/12920 variables, 12920/12920 constraints. Problems are: Problem set: 0 solved, 3 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/12920 variables, 84/13004 constraints. Problems are: Problem set: 0 solved, 3 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/12920 variables, 1636/14640 constraints. Problems are: Problem set: 0 solved, 3 unsolved
Problem DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-04 is UNSAT
FORMULA DatabaseWithMutex-PT-40-ReachabilityCardinality-2025-04 FALSE TECHNIQUES SMT_REFINEMENT
At refinement iteration 3 (INCLUDED_ONLY) 0/12920 variables, 0/14640 constraints. Problems are: Problem set: 1 solved, 2 unsolved
At refinement iteration 4 (OVERLAPS) 12800/25720 variables, 12920/27560 constraints. Problems are: Problem set: 1 solved, 2 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 25720/25720 variables, and 27560 constraints, problems are : Problem set: 1 solved, 2 unsolved in 75175 ms.
Refiners :[Domain max(s): 12920/12920 constraints, Positive P Invariants (semi-flows): 84/84 constraints, Generalized P Invariants (flows): 1636/1636 constraints, State Equation: 12920/12920 constraints, PredecessorRefiner: 3/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 1 solved, 2 unsolved
Starting Z3 with timeout 75.0 s and query timeout 7500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/11320 variables, 11320/11320 constraints. Problems are: Problem set: 1 solved, 2 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/11320 variables, 5/11325 constraints. Problems are: Problem set: 1 solved, 2 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-31 08:39:02] [INFO ] Deduced a trap composed of 81 places in 5143 ms of which 451 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-31 08:39:03] [INFO ] Deduced a trap composed of 81 places in 915 ms of which 40 ms to minimize.
At refinement iteration 2 (INCLUDED_ONLY) 0/11320 variables, 2/11327 constraints. Problems are: Problem set: 1 solved, 2 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-31 08:39:05] [INFO ] Deduced a trap composed of 81 places in 578 ms of which 4 ms to minimize.
At refinement iteration 3 (INCLUDED_ONLY) 0/11320 variables, 1/11328 constraints. Problems are: Problem set: 1 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/11320 variables, 0/11328 constraints. Problems are: Problem set: 1 solved, 2 unsolved
At refinement iteration 5 (OVERLAPS) 1600/12920 variables, 79/11407 constraints. Problems are: Problem set: 1 solved, 2 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/12920 variables, 1600/13007 constraints. Problems are: Problem set: 1 solved, 2 unsolved
SDD proceeding with computation,14 properties remain. new max is 4
SDD size :1 after 22
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 12920/25720 variables, and 14643 constraints, problems are : Problem set: 1 solved, 2 unsolved in 75040 ms.
Refiners :[Domain max(s): 12920/12920 constraints, Positive P Invariants (semi-flows): 84/84 constraints, Generalized P Invariants (flows): 1636/1636 constraints, State Equation: 0/12920 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 150402ms problems are : Problem set: 1 solved, 2 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 11320 out of 12920 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 12920/12920 places, 12800/12800 transitions.
Applied a total of 0 rules in 608 ms. Remains 12920 /12920 variables (removed 0) and now considering 12800/12800 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 608 ms. Remains : 12920/12920 places, 12800/12800 transitions.
RANDOM walk for 40000 steps (8 resets) in 18297 ms. (2 steps per ms) remains 2/2 properties
BEST_FIRST walk for 37964 steps (8 resets) in 20242 ms. (1 steps per ms) remains 2/2 properties
BEST_FIRST walk for 40004 steps (8 resets) in 117 ms. (339 steps per ms) remains 2/2 properties
Interrupted probabilistic random walk after 234133 steps, run timeout after 27041 ms. (steps per millisecond=8 ) properties seen :0 out of 2
Probabilistic random walk after 234133 steps, saw 233288 distinct states, run finished after 27041 ms. (steps per millisecond=8 ) properties seen :0
[2025-05-31 08:40:46] [INFO ] Invariant cache hit.
Starting Z3 with timeout 90.0 s and query timeout 9000.0 ms
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/11320 variables, 11320/11320 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/11320 variables, 5/11325 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/11320 variables, 0/11325 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 3 (OVERLAPS) 1600/12920 variables, 79/11404 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/12920 variables, 1600/13004 constraints. Problems are: Problem set: 0 solved, 2 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 12920/25720 variables, and 14640 constraints, problems are : Problem set: 0 solved, 2 unsolved in 90049 ms.
Refiners :[Domain max(s): 12920/12920 constraints, Positive P Invariants (semi-flows): 84/84 constraints, Generalized P Invariants (flows): 1636/1636 constraints, State Equation: 0/12920 constraints, PredecessorRefiner: 2/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 2 unsolved
Starting Z3 with timeout 90.0 s and query timeout 9000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/11320 variables, 11320/11320 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/11320 variables, 5/11325 constraints. Problems are: Problem set: 0 solved, 2 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-31 08:42:24] [INFO ] Deduced a trap composed of 81 places in 4638 ms of which 440 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-31 08:42:25] [INFO ] Deduced a trap composed of 81 places in 840 ms of which 41 ms to minimize.
At refinement iteration 2 (INCLUDED_ONLY) 0/11320 variables, 2/11327 constraints. Problems are: Problem set: 0 solved, 2 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-31 08:42:27] [INFO ] Deduced a trap composed of 81 places in 534 ms of which 4 ms to minimize.
At refinement iteration 3 (INCLUDED_ONLY) 0/11320 variables, 1/11328 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/11320 variables, 0/11328 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 5 (OVERLAPS) 1600/12920 variables, 79/11407 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/12920 variables, 1600/13007 constraints. Problems are: Problem set: 0 solved, 2 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 12920/25720 variables, and 14643 constraints, problems are : Problem set: 0 solved, 2 unsolved in 90042 ms.
Refiners :[Domain max(s): 12920/12920 constraints, Positive P Invariants (semi-flows): 84/84 constraints, Generalized P Invariants (flows): 1636/1636 constraints, State Equation: 0/12920 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 180247ms problems are : Problem set: 0 solved, 2 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 11320 out of 12920 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 12920/12920 places, 12800/12800 transitions.
Applied a total of 0 rules in 467 ms. Remains 12920 /12920 variables (removed 0) and now considering 12800/12800 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 468 ms. Remains : 12920/12920 places, 12800/12800 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 12920/12920 places, 12800/12800 transitions.
Applied a total of 0 rules in 558 ms. Remains 12920 /12920 variables (removed 0) and now considering 12800/12800 (removed 0) transitions.
[2025-05-31 08:43:48] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-05-31 08:43:53] [INFO ] Implicit Places using invariants in 5176 ms returned []
Implicit Place search using SMT only with invariants took 5189 ms to find 0 implicit places.
Running 11200 sub problems to find dead transitions.
[2025-05-31 08:43:53] [INFO ] Invariant cache hit.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
SDD proceeding with computation,14 properties remain. new max is 8
SDD size :22 after 25
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
SDD proceeding with computation,14 properties remain. new max is 16
SDD size :25 after 37
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
SDD proceeding with computation,14 properties remain. new max is 32
SDD size :37 after 55
Excessive predecessor constraint size, skipping predecessor.
Excessive predecessor constraint size, skipping predecessor.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
SDD proceeding with computation,14 properties remain. new max is 64
SDD size :55 after 2102
At refinement iteration 0 (INCLUDED_ONLY) 0/12880 variables, 12880/12880 constraints. Problems are: Problem set: 0 solved, 11200 unsolved
SMT process timed out in 59447ms, After SMT, problems are : Problem set: 0 solved, 11200 unsolved
Search for dead transitions found 0 dead transitions in 59531ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65355 ms. Remains : 12920/12920 places, 12800/12800 transitions.
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
[2025-05-31 08:44:55] [INFO ] Flatten gal took : 1812 ms
[2025-05-31 08:44:55] [INFO ] Applying decomposition
[2025-05-31 08:44:56] [INFO ] Flatten gal took : 1294 ms
[2025-05-31 08:45:30] [WARNING] Could not apply decomposition. Using flat GAL structure.
java.util.concurrent.TimeoutException: Subprocess running '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph7851834459817781652.txt' '-o' '/tmp/graph7851834459817781652.bin' '-w' '/tmp/graph7851834459817781652.weights' killed by timeout after 10 SECONDS
at fr.lip6.move.gal.process.Runner.waitForOrTimeout(Runner.java:76)
at fr.lip6.move.gal.process.Runner.runTool(Runner.java:47)
at fr.lip6.move.gal.process.Runner.runTool(Runner.java:27)
at fr.lip6.move.gal.louvain.GraphBuilder.convertGraphToBin(GraphBuilder.java:258)
at fr.lip6.move.gal.louvain.GraphBuilder.computeLouvain(GraphBuilder.java:189)
at fr.lip6.move.gal.louvain.GraphBuilder.computeLouvain(GraphBuilder.java:157)
at fr.lip6.move.gal.application.mcc.MccTranslator.applyOrder(MccTranslator.java:114)
at fr.lip6.move.gal.application.mcc.MccTranslator.flattenSpec(MccTranslator.java:230)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.verifyWithSDD(GlobalPropertySolver.java:719)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.lambda$2(ReachabilitySolver.java:71)
at java.base/java.lang.Thread.run(Thread.java:1583)
[2025-05-31 08:45:31] [INFO ] Flatten gal took : 1408 ms
[2025-05-31 08:45:31] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality15688936494325554412.gal : 169 ms
[2025-05-31 08:45:31] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality11637554554948482520.prop : 12 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality15688936494325554412.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality11637554554948482520.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...330
Loading property file /tmp/ReachabilityCardinality11637554554948482520.prop.
SDD proceeding with computation,2 properties remain. new max is 4
SDD size :1 after 22
SDD proceeding with computation,2 properties remain. new max is 8
SDD size :22 after 25
SDD proceeding with computation,2 properties remain. new max is 16
SDD size :25 after 37
SDD proceeding with computation,2 properties remain. new max is 32
SDD size :37 after 55
SDD proceeding with computation,2 properties remain. new max is 64
SDD size :55 after 2102
SDD proceeding with computation,2 properties remain. new max is 128
SDD size :2102 after 16927
ITS-tools command line returned an error code 137
[2025-05-31 09:02:48] [INFO ] Flatten gal took : 3427 ms
Using solver Z3 to compute partial order matrices.
Built C files in :
/tmp/ltsmin8944775811936704626
[2025-05-31 09:02:49] [INFO ] Too many transitions (12800) to apply POR reductions. Disabling POR matrices.
[2025-05-31 09:02:50] [INFO ] Built C files in 387ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin8944775811936704626
Running compilation step : cd /tmp/ltsmin8944775811936704626;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202505121319/bin/limit_time.pl' '360' 'gcc' '-c' '-I/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202505121319/bin/include/' '-I.' '-std=c99' '-fPIC' '-O0' 'model.c'
[2025-05-31 09:02:50] [INFO ] Applying decomposition
[2025-05-31 09:02:52] [INFO ] Flatten gal took : 2018 ms
[2025-05-31 09:03:33] [WARNING] Could not apply decomposition. Using flat GAL structure.
java.util.concurrent.TimeoutException: Subprocess running '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph9306153549376660937.txt' '-o' '/tmp/graph9306153549376660937.bin' '-w' '/tmp/graph9306153549376660937.weights' killed by timeout after 10 SECONDS
at fr.lip6.move.gal.process.Runner.waitForOrTimeout(Runner.java:76)
at fr.lip6.move.gal.process.Runner.runTool(Runner.java:47)
at fr.lip6.move.gal.process.Runner.runTool(Runner.java:27)
at fr.lip6.move.gal.louvain.GraphBuilder.convertGraphToBin(GraphBuilder.java:258)
at fr.lip6.move.gal.louvain.GraphBuilder.computeLouvain(GraphBuilder.java:189)
at fr.lip6.move.gal.louvain.GraphBuilder.computeLouvain(GraphBuilder.java:157)
at fr.lip6.move.gal.application.mcc.MccTranslator.applyOrder(MccTranslator.java:114)
at fr.lip6.move.gal.application.mcc.MccTranslator.flattenSpec(MccTranslator.java:230)
at fr.lip6.move.gal.application.runner.its.MultiOrderRunner.runMultiITS(MultiOrderRunner.java:106)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:1251)
at fr.lip6.move.gal.application.Application.start(Application.java:193)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:44)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:670)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:607)
at org.eclipse.equinox.launcher.Main.run(Main.java:1492)
at org.eclipse.equinox.launcher.Main.main(Main.java:1465)
[2025-05-31 09:03:34] [INFO ] Flatten gal took : 1317 ms
[2025-05-31 09:03:34] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality9971965054404650229.gal : 158 ms
[2025-05-31 09:03:34] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality10593366604383867658.prop : 12 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality9971965054404650229.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality10593366604383867658.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality10593366604383867658.prop.
Compilation finished in 148906 ms.
Running link step : cd /tmp/ltsmin8944775811936704626;'gcc' '-shared' '-o' 'gal.so' 'model.o'
Link finished in 157 ms.
Running LTSmin : cd /tmp/ltsmin8944775811936704626;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202505121319/bin/pins2lts-mc-linux64' './gal.so' '--threads=8' '-p' '--pins-guards' '--when' '-i' 'DatabaseWithMutexPT40ReachabilityCardinality202505==true'
SDD proceeding with computation,2 properties remain. new max is 4
SDD size :1 after 22
SDD proceeding with computation,2 properties remain. new max is 8
SDD size :22 after 25
SDD proceeding with computation,2 properties remain. new max is 16
SDD size :25 after 37
SDD proceeding with computation,2 properties remain. new max is 32
SDD size :37 after 55
SDD proceeding with computation,2 properties remain. new max is 64
SDD size :55 after 2102
SDD proceeding with computation,2 properties remain. new max is 128
SDD size :2102 after 16927
WARNING : LTSmin timed out (>900 s) on command cd /tmp/ltsmin8944775811936704626;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202505121319/bin/pins2lts-mc-linux64' './gal.so' '--threads=8' '-p' '--pins-guards' '--when' '-i' 'DatabaseWithMutexPT40ReachabilityCardinality202505==true'
Running LTSmin : cd /tmp/ltsmin8944775811936704626;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202505121319/bin/pins2lts-mc-linux64' './gal.so' '--threads=8' '-p' '--pins-guards' '--when' '-i' 'DatabaseWithMutexPT40ReachabilityCardinality202510==true'
Detected timeout of ITS tools.
[2025-05-31 09:33:23] [INFO ] Applying decomposition

BK_TIME_CONFINEMENT_REACHED

--------------------
content from stderr:

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600

Sequence of Actions to be Executed by the VM

This is useful if one wants to reexecute the tool in the VM from the submitted image disk.

set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="DatabaseWithMutex-PT-40"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# this is specific to your benchmark or test

export BIN_DIR="$HOME/BenchKit/bin"

# remove the execution directoty if it exists (to avoid increse of .vmdk images)
if [ -d execution ] ; then
rm -rf execution
fi

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5832"
echo " Executing tool itstools"
echo " Input is DatabaseWithMutex-PT-40, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r044-tall-174854029200862"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DatabaseWithMutex-PT-40.tgz
mv DatabaseWithMutex-PT-40 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh

echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "StateSpace" ] ; then
echo "The expected result is a vector of booleans"
echo BOOL_VECTOR
else
echo "no data necessary for post analysis"
fi
echo
if [ -f "ReachabilityCardinality.xml" ] ; then # for cunf (txt files deleted;-)
echo echo "here is the order used to build the result vector(from xml file)"
for x in $(grep '' ReachabilityCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
fi
echo
echo "=== Now, execution of the tool begins"
echo
echo -n "BK_START "
date -u +%s%3N
echo
timeout -s 9 $BK_TIME_CONFINEMENT bash -c "/home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n \"BK_STOP \" ; date -u +%s%3N"
if [ $? -eq 137 ] ; then
echo
echo "BK_TIME_CONFINEMENT_REACHED"
fi
echo
echo "--------------------"
echo "content from stderr:"
echo
cat STDERR ;