Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r044-tall-174854028200335.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 CloudReconfiguration-PT-317, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r044-tall-174854028200335
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.2M
-rw-r--r-- 1 mcc users 8.1K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 87K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.3K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 43K 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 6.8K May 29 14:32 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.3K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 31K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 16K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 173K May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.5K May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 58K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 29 14:32 equiv_col
-rw-r--r-- 1 mcc users 4 May 29 14:32 instance
-rw-r--r-- 1 mcc users 6 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 661K 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 CloudReconfiguration-PT-317-ReachabilityFireability-2025-00
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-01
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-02
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-03
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-04
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-05
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-06
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-07
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-08
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-09
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-10
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-11
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-12
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-13
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-14
FORMULA_NAME CloudReconfiguration-PT-317-ReachabilityFireability-2025-15

=== Now, execution of the tool begins

BK_START 1748598618130

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=CloudReconfiguration-PT-317
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
ReachabilityFireability PT
Running Version 202505121319
[2025-05-30 09:50:19] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2025-05-30 09:50:19] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2025-05-30 09:50:19] [INFO ] Load time of PNML (sax parser for PT used): 142 ms
[2025-05-30 09:50:19] [INFO ] Transformed 2587 places.
[2025-05-30 09:50:19] [INFO ] Transformed 3099 transitions.
[2025-05-30 09:50:19] [INFO ] Found NUPN structural information;
[2025-05-30 09:50:19] [INFO ] Parsed PT model containing 2587 places and 3099 transitions and 6479 arcs in 243 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 12 ms.
Working with output stream class java.io.PrintStream
RANDOM walk for 40000 steps (443 resets) in 1892 ms. (21 steps per ms) remains 13/16 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-06 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (160 resets) in 644 ms. (62 steps per ms) remains 12/13 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-00 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
[2025-05-30 09:50:20] [INFO ] Flatten gal took : 442 ms
BEST_FIRST walk for 40002 steps (163 resets) in 378 ms. (105 steps per ms) remains 11/12 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-14 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40004 steps (158 resets) in 263 ms. (151 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (166 resets) in 208 ms. (191 steps per ms) remains 10/11 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-04 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40002 steps (156 resets) in 255 ms. (156 steps per ms) remains 9/10 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-07 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
[2025-05-30 09:50:20] [INFO ] Flatten gal took : 247 ms
BEST_FIRST walk for 40003 steps (155 resets) in 148 ms. (268 steps per ms) remains 9/9 properties
BEST_FIRST walk for 40004 steps (159 resets) in 223 ms. (178 steps per ms) remains 9/9 properties
[2025-05-30 09:50:21] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality555883430010766678.gal : 110 ms
BEST_FIRST walk for 40002 steps (154 resets) in 197 ms. (202 steps per ms) remains 9/9 properties
[2025-05-30 09:50:21] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality5439509928725164961.prop : 2 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/ReachabilityCardinality555883430010766678.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality5439509928725164961.prop' '--nowitness' '--gen-order' 'FOLLOW'
BEST_FIRST walk for 40004 steps (59 resets) in 108 ms. (367 steps per ms) remains 9/9 properties

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 ...327
BEST_FIRST walk for 40002 steps (146 resets) in 237 ms. (168 steps per ms) remains 9/9 properties
BEST_FIRST walk for 40002 steps (144 resets) in 202 ms. (197 steps per ms) remains 9/9 properties
// Phase 1: matrix 3099 rows 2587 cols
[2025-05-30 09:50:21] [INFO ] Computed 4 invariants in 43 ms
Loading property file /tmp/ReachabilityCardinality5439509928725164961.prop.
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) 0/99 variables, 99/99 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/99 variables, 0/99 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 2 (OVERLAPS) 2477/2576 variables, 4/103 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/2576 variables, 2477/2580 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/2576 variables, 0/2580 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 5 (OVERLAPS) 3089/5665 variables, 2576/5156 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/5665 variables, 0/5156 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 7 (OVERLAPS) 2/5667 variables, 1/5157 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/5667 variables, 1/5158 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/5667 variables, 0/5158 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 10 (OVERLAPS) 2/5669 variables, 1/5159 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/5669 variables, 1/5160 constraints. Problems are: Problem set: 0 solved, 9 unsolved
SDD proceeding with computation,9 properties remain. new max is 4
SDD size :1 after 2
SDD proceeding with computation,9 properties remain. new max is 8
SDD size :2 after 3
SDD proceeding with computation,9 properties remain. new max is 16
SDD size :3 after 4
SDD proceeding with computation,9 properties remain. new max is 32
SDD size :4 after 5
SDD proceeding with computation,9 properties remain. new max is 64
SDD size :5 after 6
SDD proceeding with computation,9 properties remain. new max is 128
SDD size :6 after 7
SDD proceeding with computation,9 properties remain. new max is 256
SDD size :7 after 9
SDD proceeding with computation,9 properties remain. new max is 512
SDD size :9 after 11
SDD proceeding with computation,9 properties remain. new max is 1024
SDD size :11 after 19
SDD proceeding with computation,9 properties remain. new max is 2048
SDD size :19 after 320
At refinement iteration 12 (INCLUDED_ONLY) 0/5669 variables, 0/5160 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 13 (OVERLAPS) 2/5671 variables, 1/5161 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/5671 variables, 1/5162 constraints. Problems are: Problem set: 0 solved, 9 unsolved
SDD proceeding with computation,9 properties remain. new max is 4096
SDD size :320 after 2136
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5671/5686 variables, and 5162 constraints, problems are : Problem set: 0 solved, 9 unsolved in 5054 ms.
Refiners :[Domain max(s): 2579/2587 constraints, Generalized P Invariants (flows): 4/4 constraints, State Equation: 2579/2587 constraints, PredecessorRefiner: 9/6 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 9 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/99 variables, 99/99 constraints. Problems are: Problem set: 0 solved, 9 unsolved
SDD proceeding with computation,9 properties remain. new max is 8192
SDD size :2136 after 5386
At refinement iteration 1 (INCLUDED_ONLY) 0/99 variables, 0/99 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 2 (OVERLAPS) 2477/2576 variables, 4/103 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/2576 variables, 2477/2580 constraints. Problems are: Problem set: 0 solved, 9 unsolved
SDD proceeding with computation,9 properties remain. new max is 16384
SDD size :5386 after 206266
At refinement iteration 4 (INCLUDED_ONLY) 0/2576 variables, 0/2580 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 5 (OVERLAPS) 3089/5665 variables, 2576/5156 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/5665 variables, 6/5162 constraints. Problems are: Problem set: 0 solved, 9 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/5665 variables, 0/5162 constraints. Problems are: Problem set: 0 solved, 9 unsolved
SMT process timed out in 10248ms, After SMT, problems are : Problem set: 0 solved, 9 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 99 out of 2587 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 2587/2587 places, 3099/3099 transitions.
Graph (trivial) has 2652 edges and 2587 vertex of which 547 / 2587 are part of one of the 50 SCC in 9 ms
Free SCC test removed 497 places
Drop transitions (Empty/Sink Transition effects.) removed 597 transitions
Reduce isomorphic transitions removed 597 transitions.
Graph (complete) has 2788 edges and 2090 vertex of which 2076 are kept as prefixes of interest. Removing 14 places using SCC suffix rule.5 ms
Discarding 14 places :
Also discarding 9 output transitions
Drop transitions (Output transitions of discarded places.) removed 9 transitions
Drop transitions (Empty/Sink Transition effects.) removed 5 transitions
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 7 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 1179 transitions
Trivial Post-agglo rules discarded 1179 transitions
Performed 1179 trivial Post agglomeration. Transition count delta: 1179
Iterating post reduction 0 with 1186 rules applied. Total rules applied 1188 place count 2076 transition count 1307
Reduce places removed 1179 places and 0 transitions.
Ensure Unique test removed 62 transitions
Reduce isomorphic transitions removed 62 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 37 transitions
Trivial Post-agglo rules discarded 37 transitions
Performed 37 trivial Post agglomeration. Transition count delta: 37
Iterating post reduction 1 with 1278 rules applied. Total rules applied 2466 place count 897 transition count 1208
Reduce places removed 37 places and 0 transitions.
Ensure Unique test removed 7 transitions
Reduce isomorphic transitions removed 7 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 4 transitions
Trivial Post-agglo rules discarded 4 transitions
Performed 4 trivial Post agglomeration. Transition count delta: 4
Iterating post reduction 2 with 48 rules applied. Total rules applied 2514 place count 860 transition count 1197
Reduce places removed 4 places and 0 transitions.
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 4 transitions
Trivial Post-agglo rules discarded 4 transitions
Performed 4 trivial Post agglomeration. Transition count delta: 4
Iterating post reduction 3 with 12 rules applied. Total rules applied 2526 place count 856 transition count 1189
Reduce places removed 4 places and 0 transitions.
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 4 transitions
Trivial Post-agglo rules discarded 4 transitions
Performed 4 trivial Post agglomeration. Transition count delta: 4
Iterating post reduction 4 with 10 rules applied. Total rules applied 2536 place count 852 transition count 1183
Reduce places removed 4 places and 0 transitions.
Performed 103 Post agglomeration using F-continuation condition.Transition count delta: 103
Iterating post reduction 5 with 107 rules applied. Total rules applied 2643 place count 848 transition count 1080
Reduce places removed 103 places and 0 transitions.
Ensure Unique test removed 21 transitions
Reduce isomorphic transitions removed 21 transitions.
Performed 6 Post agglomeration using F-continuation condition.Transition count delta: 6
Iterating post reduction 6 with 130 rules applied. Total rules applied 2773 place count 745 transition count 1053
Reduce places removed 6 places and 0 transitions.
Iterating post reduction 7 with 6 rules applied. Total rules applied 2779 place count 739 transition count 1053
Performed 34 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 8 with 34 Pre rules applied. Total rules applied 2779 place count 739 transition count 1019
Deduced a syphon composed of 34 places in 1 ms
Reduce places removed 34 places and 0 transitions.
Iterating global reduction 8 with 68 rules applied. Total rules applied 2847 place count 705 transition count 1019
Discarding 110 places :
Symmetric choice reduction at 8 with 110 rule applications. Total rules 2957 place count 595 transition count 909
Iterating global reduction 8 with 110 rules applied. Total rules applied 3067 place count 595 transition count 909
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 8 with 1 rules applied. Total rules applied 3068 place count 595 transition count 908
Performed 6 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 9 with 6 Pre rules applied. Total rules applied 3068 place count 595 transition count 902
Deduced a syphon composed of 6 places in 2 ms
Reduce places removed 6 places and 0 transitions.
Iterating global reduction 9 with 12 rules applied. Total rules applied 3080 place count 589 transition count 902
Discarding 54 places :
Symmetric choice reduction at 9 with 54 rule applications. Total rules 3134 place count 535 transition count 848
Iterating global reduction 9 with 54 rules applied. Total rules applied 3188 place count 535 transition count 848
Ensure Unique test removed 13 transitions
Reduce isomorphic transitions removed 13 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 11 transitions
Trivial Post-agglo rules discarded 11 transitions
Performed 11 trivial Post agglomeration. Transition count delta: 11
Iterating post reduction 9 with 24 rules applied. Total rules applied 3212 place count 535 transition count 824
Reduce places removed 11 places and 0 transitions.
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 3 transitions
Trivial Post-agglo rules discarded 3 transitions
Performed 3 trivial Post agglomeration. Transition count delta: 3
Iterating post reduction 10 with 17 rules applied. Total rules applied 3229 place count 524 transition count 818
Reduce places removed 3 places and 0 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Iterating post reduction 11 with 5 rules applied. Total rules applied 3234 place count 521 transition count 816
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 12 with 2 rules applied. Total rules applied 3236 place count 519 transition count 816
Discarding 10 places :
Symmetric choice reduction at 13 with 10 rule applications. Total rules 3246 place count 509 transition count 800
Iterating global reduction 13 with 10 rules applied. Total rules applied 3256 place count 509 transition count 800
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Iterating post reduction 13 with 3 rules applied. Total rules applied 3259 place count 509 transition count 797
Discarding 4 places :
Symmetric choice reduction at 14 with 4 rule applications. Total rules 3263 place count 505 transition count 789
Iterating global reduction 14 with 4 rules applied. Total rules applied 3267 place count 505 transition count 789
Discarding 1 places :
Symmetric choice reduction at 14 with 1 rule applications. Total rules 3268 place count 504 transition count 787
Iterating global reduction 14 with 1 rules applied. Total rules applied 3269 place count 504 transition count 787
Performed 173 Post agglomeration using F-continuation condition with reduction of 52 identical transitions.
Deduced a syphon composed of 173 places in 0 ms
Reduce places removed 173 places and 0 transitions.
Iterating global reduction 14 with 346 rules applied. Total rules applied 3615 place count 331 transition count 562
Ensure Unique test removed 15 transitions
Reduce isomorphic transitions removed 15 transitions.
Iterating post reduction 14 with 15 rules applied. Total rules applied 3630 place count 331 transition count 547
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 0 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 15 with 6 rules applied. Total rules applied 3636 place count 328 transition count 544
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 15 with 4 rules applied. Total rules applied 3640 place count 328 transition count 540
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 1 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 16 with 2 rules applied. Total rules applied 3642 place count 327 transition count 539
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 16 with 2 rules applied. Total rules applied 3644 place count 327 transition count 537
Performed 48 Post agglomeration using F-continuation condition with reduction of 22 identical transitions.
Deduced a syphon composed of 48 places in 1 ms
Reduce places removed 48 places and 0 transitions.
Iterating global reduction 17 with 96 rules applied. Total rules applied 3740 place count 279 transition count 594
Ensure Unique test removed 32 transitions
Reduce isomorphic transitions removed 32 transitions.
Iterating post reduction 17 with 32 rules applied. Total rules applied 3772 place count 279 transition count 562
Discarding 10 places :
Symmetric choice reduction at 18 with 10 rule applications. Total rules 3782 place count 269 transition count 541
Iterating global reduction 18 with 10 rules applied. Total rules applied 3792 place count 269 transition count 541
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 18 with 2 rules applied. Total rules applied 3794 place count 269 transition count 539
Discarding 1 places :
Symmetric choice reduction at 19 with 1 rule applications. Total rules 3795 place count 268 transition count 537
Iterating global reduction 19 with 1 rules applied. Total rules applied 3796 place count 268 transition count 537
Drop transitions (Redundant composition of simpler transitions.) removed 26 transitions
Redundant transition composition rules discarded 26 transitions
Iterating global reduction 19 with 26 rules applied. Total rules applied 3822 place count 268 transition count 511
Discarding 1 places :
Symmetric choice reduction at 19 with 1 rule applications. Total rules 3823 place count 267 transition count 510
Iterating global reduction 19 with 1 rules applied. Total rules applied 3824 place count 267 transition count 510
Free-agglomeration rule applied 16 times.
Iterating global reduction 19 with 16 rules applied. Total rules applied 3840 place count 267 transition count 494
Reduce places removed 16 places and 0 transitions.
Iterating post reduction 19 with 16 rules applied. Total rules applied 3856 place count 251 transition count 494
Drop transitions (Redundant composition of simpler transitions.) removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 20 with 2 rules applied. Total rules applied 3858 place count 251 transition count 492
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 20 with 1 rules applied. Total rules applied 3859 place count 251 transition count 491
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 20 with 1 rules applied. Total rules applied 3860 place count 250 transition count 491
Partial Free-agglomeration rule applied 18 times.
Drop transitions (Partial Free agglomeration) removed 18 transitions
Iterating global reduction 21 with 18 rules applied. Total rules applied 3878 place count 250 transition count 491
Drop transitions (Redundant composition of simpler transitions.) removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 21 with 2 rules applied. Total rules applied 3880 place count 250 transition count 489
Partial Post-agglomeration rule applied 4 times.
Drop transitions (Partial Post agglomeration) removed 4 transitions
Iterating global reduction 21 with 4 rules applied. Total rules applied 3884 place count 250 transition count 489
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 21 with 1 rules applied. Total rules applied 3885 place count 249 transition count 488
Applied a total of 3885 rules in 473 ms. Remains 249 /2587 variables (removed 2338) and now considering 488/3099 (removed 2611) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 481 ms. Remains : 249/2587 places, 488/3099 transitions.
RANDOM walk for 40000 steps (3934 resets) in 519 ms. (76 steps per ms) remains 6/9 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-10 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-02 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (852 resets) in 75 ms. (526 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40002 steps (837 resets) in 66 ms. (597 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40002 steps (942 resets) in 122 ms. (325 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40004 steps (516 resets) in 90 ms. (439 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40004 steps (867 resets) in 76 ms. (519 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40003 steps (874 resets) in 95 ms. (416 steps per ms) remains 6/6 properties
[2025-05-30 09:50:32] [INFO ] Flow matrix only has 479 transitions (discarded 9 similar events)
// Phase 1: matrix 479 rows 249 cols
[2025-05-30 09:50:32] [INFO ] Computed 3 invariants in 2 ms
[2025-05-30 09:50:32] [INFO ] State equation strengthened by 7 read => feed constraints.
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) 0/55 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 1 (OVERLAPS) 152/207 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/207 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 3 (OVERLAPS) 444/651 variables, 207/210 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/651 variables, 3/213 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/651 variables, 0/213 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 6 (OVERLAPS) 62/713 variables, 31/244 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/713 variables, 4/248 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/713 variables, 0/248 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 9 (OVERLAPS) 13/726 variables, 9/257 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/726 variables, 0/257 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 11 (OVERLAPS) 2/728 variables, 2/259 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/728 variables, 0/259 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 13 (OVERLAPS) 0/728 variables, 0/259 constraints. Problems are: Problem set: 0 solved, 6 unsolved
No progress, stopping.
After SMT solving in domain Real declared 728/728 variables, and 259 constraints, problems are : Problem set: 0 solved, 6 unsolved in 613 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 249/249 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 6/4 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 6 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/55 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 1 (OVERLAPS) 152/207 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/207 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 3 (OVERLAPS) 444/651 variables, 207/210 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/651 variables, 3/213 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/651 variables, 3/216 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/651 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 7 (OVERLAPS) 62/713 variables, 31/247 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/713 variables, 4/251 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/713 variables, 1/252 constraints. Problems are: Problem set: 0 solved, 6 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-30 09:50:33] [INFO ] Deduced a trap composed of 53 places in 71 ms of which 5 ms to minimize.
Problem CloudReconfiguration-PT-317-ReachabilityFireability-2025-12 is UNSAT
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-12 FALSE TECHNIQUES SMT_REFINEMENT
Problem CloudReconfiguration-PT-317-ReachabilityFireability-2025-15 is UNSAT
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-15 FALSE TECHNIQUES SMT_REFINEMENT
At refinement iteration 10 (INCLUDED_ONLY) 0/713 variables, 1/253 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/713 variables, 0/253 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 12 (OVERLAPS) 13/726 variables, 9/262 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/726 variables, 0/262 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 14 (OVERLAPS) 2/728 variables, 2/264 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/728 variables, 0/264 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 16 (OVERLAPS) 0/728 variables, 0/264 constraints. Problems are: Problem set: 2 solved, 4 unsolved
No progress, stopping.
After SMT solving in domain Int declared 728/728 variables, and 264 constraints, problems are : Problem set: 2 solved, 4 unsolved in 1225 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 249/249 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 6/4 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 1866ms problems are : Problem set: 2 solved, 4 unsolved
Fused 4 Parikh solutions to 3 different solutions.
Parikh walk visited 0 properties in 213 ms.
Support contains 22 out of 249 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 249/249 places, 488/488 transitions.
Graph (trivial) has 241 edges and 249 vertex of which 65 / 249 are part of one of the 27 SCC in 0 ms
Free SCC test removed 38 places
Drop transitions (Empty/Sink Transition effects.) removed 71 transitions
Reduce isomorphic transitions removed 71 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 33 transitions
Trivial Post-agglo rules discarded 33 transitions
Performed 33 trivial Post agglomeration. Transition count delta: 33
Iterating post reduction 0 with 33 rules applied. Total rules applied 34 place count 211 transition count 384
Reduce places removed 33 places and 0 transitions.
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 36 rules applied. Total rules applied 70 place count 178 transition count 381
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 71 place count 177 transition count 381
Performed 8 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 8 Pre rules applied. Total rules applied 71 place count 177 transition count 373
Deduced a syphon composed of 8 places in 0 ms
Reduce places removed 8 places and 0 transitions.
Iterating global reduction 3 with 16 rules applied. Total rules applied 87 place count 169 transition count 373
Discarding 11 places :
Symmetric choice reduction at 3 with 11 rule applications. Total rules 98 place count 158 transition count 361
Iterating global reduction 3 with 11 rules applied. Total rules applied 109 place count 158 transition count 361
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 3 with 4 rules applied. Total rules applied 113 place count 158 transition count 357
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 1 Pre rules applied. Total rules applied 113 place count 158 transition count 356
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 115 place count 157 transition count 356
Performed 27 Post agglomeration using F-continuation condition with reduction of 6 identical transitions.
Deduced a syphon composed of 27 places in 0 ms
Reduce places removed 27 places and 0 transitions.
Iterating global reduction 4 with 54 rules applied. Total rules applied 169 place count 130 transition count 323
Ensure Unique test removed 18 transitions
Reduce isomorphic transitions removed 18 transitions.
Iterating post reduction 4 with 18 rules applied. Total rules applied 187 place count 130 transition count 305
Discarding 3 places :
Symmetric choice reduction at 5 with 3 rule applications. Total rules 190 place count 127 transition count 300
Iterating global reduction 5 with 3 rules applied. Total rules applied 193 place count 127 transition count 300
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 5 with 1 rules applied. Total rules applied 194 place count 127 transition count 299
Performed 12 Post agglomeration using F-continuation condition.Transition count delta: -33
Deduced a syphon composed of 12 places in 0 ms
Reduce places removed 12 places and 0 transitions.
Iterating global reduction 6 with 24 rules applied. Total rules applied 218 place count 115 transition count 332
Ensure Unique test removed 37 transitions
Reduce isomorphic transitions removed 37 transitions.
Iterating post reduction 6 with 37 rules applied. Total rules applied 255 place count 115 transition count 295
Discarding 10 places :
Symmetric choice reduction at 7 with 10 rule applications. Total rules 265 place count 105 transition count 267
Iterating global reduction 7 with 10 rules applied. Total rules applied 275 place count 105 transition count 267
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 7 with 1 rules applied. Total rules applied 276 place count 105 transition count 266
Discarding 4 places :
Symmetric choice reduction at 8 with 4 rule applications. Total rules 280 place count 101 transition count 262
Iterating global reduction 8 with 4 rules applied. Total rules applied 284 place count 101 transition count 262
Ensure Unique test removed 12 transitions
Reduce isomorphic transitions removed 12 transitions.
Iterating post reduction 8 with 12 rules applied. Total rules applied 296 place count 101 transition count 250
Drop transitions (Redundant composition of simpler transitions.) removed 12 transitions
Redundant transition composition rules discarded 12 transitions
Iterating global reduction 9 with 12 rules applied. Total rules applied 308 place count 101 transition count 238
Drop transitions (Trivial Post-Agglo cleanup.) removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 9 with 1 rules applied. Total rules applied 309 place count 101 transition count 237
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 10 with 1 rules applied. Total rules applied 310 place count 100 transition count 237
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 11 with 2 rules applied. Total rules applied 312 place count 99 transition count 236
Free-agglomeration rule applied 5 times.
Iterating global reduction 11 with 5 rules applied. Total rules applied 317 place count 99 transition count 231
Reduce places removed 5 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 11 with 6 rules applied. Total rules applied 323 place count 94 transition count 230
Drop transitions (Redundant composition of simpler transitions.) removed 3 transitions
Redundant transition composition rules discarded 3 transitions
Iterating global reduction 12 with 3 rules applied. Total rules applied 326 place count 94 transition count 227
Partial Free-agglomeration rule applied 8 times.
Drop transitions (Partial Free agglomeration) removed 8 transitions
Iterating global reduction 12 with 8 rules applied. Total rules applied 334 place count 94 transition count 227
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 12 with 2 rules applied. Total rules applied 336 place count 94 transition count 225
Drop transitions (Redundant composition of simpler transitions.) removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 13 with 2 rules applied. Total rules applied 338 place count 94 transition count 223
Partial Post-agglomeration rule applied 1 times.
Drop transitions (Partial Post agglomeration) removed 1 transitions
Iterating global reduction 13 with 1 rules applied. Total rules applied 339 place count 94 transition count 223
Discarding 1 places :
Symmetric choice reduction at 13 with 1 rule applications. Total rules 340 place count 93 transition count 222
Iterating global reduction 13 with 1 rules applied. Total rules applied 341 place count 93 transition count 222
Applied a total of 341 rules in 66 ms. Remains 93 /249 variables (removed 156) and now considering 222/488 (removed 266) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 66 ms. Remains : 93/249 places, 222/488 transitions.
RANDOM walk for 40000 steps (4814 resets) in 467 ms. (85 steps per ms) remains 0/4 properties
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-13 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-317-ReachabilityFireability-2025-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
All properties solved without resorting to model-checking.
Total runtime 15315 ms.

BK_STOP 1748598634701

--------------------
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
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -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//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -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="CloudReconfiguration-PT-317"
export BK_EXAMINATION="ReachabilityFireability"
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 CloudReconfiguration-PT-317, examination is ReachabilityFireability"
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-174854028200335"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CloudReconfiguration-PT-317.tgz
mv CloudReconfiguration-PT-317 execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;