Execution Chart

We display below the execution chart for this examination (boot time has been removed).

Trace from the execution

Formatting '/data/fkordon/mcc2023-input.r169-tall-167838856000491.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.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 2-5348
Executing tool ltsminxred
Input is FlexibleBarrier-PT-10a, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r169-tall-167838856000491
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 516K
-rw-r--r-- 1 mcc users 6.6K Feb 25 12:50 CTLCardinality.txt
-rw-r--r-- 1 mcc users 70K Feb 25 12:50 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.2K Feb 25 12:41 CTLFireability.txt
-rw-r--r-- 1 mcc users 47K Feb 25 12:41 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.6K Feb 25 16:07 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Feb 25 16:07 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 16:07 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 16:07 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.0K Feb 25 12:55 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 80K Feb 25 12:55 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 10K Feb 25 12:53 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 89K Feb 25 12:53 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Feb 25 16:07 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 16:07 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 94K Mar 5 18:22 model.pnml

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

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

The expected result is a vector of booleans
BOOL_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-00
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-01
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-02
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-03
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-04
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-05
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-06
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-07
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-08
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-09
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-10
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-11
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-12
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-13
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-14
FORMULA_NAME FlexibleBarrier-PT-10a-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1678554716951

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=LTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=FlexibleBarrier-PT-10a
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-11 17:11:58] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -timeout, 360, -rebuildPNML]
[2023-03-11 17:11:58] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-11 17:11:58] [INFO ] Load time of PNML (sax parser for PT used): 59 ms
[2023-03-11 17:11:58] [INFO ] Transformed 123 places.
[2023-03-11 17:11:58] [INFO ] Transformed 334 transitions.
[2023-03-11 17:11:58] [INFO ] Found NUPN structural information;
[2023-03-11 17:11:58] [INFO ] Parsed PT model containing 123 places and 334 transitions and 1467 arcs in 127 ms.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 9 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 2 formulas.
Ensure Unique test removed 82 transitions
Reduce redundant transitions removed 82 transitions.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-00 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Initial state reduction rules removed 1 formulas.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-03 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 20 out of 123 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 123/123 places, 252/252 transitions.
Drop transitions removed 10 transitions
Redundant transition composition rules discarded 10 transitions
Iterating global reduction 0 with 10 rules applied. Total rules applied 10 place count 123 transition count 242
Applied a total of 10 rules in 27 ms. Remains 123 /123 variables (removed 0) and now considering 242/252 (removed 10) transitions.
// Phase 1: matrix 242 rows 123 cols
[2023-03-11 17:11:59] [INFO ] Computed 12 place invariants in 13 ms
[2023-03-11 17:11:59] [INFO ] Implicit Places using invariants in 222 ms returned [121]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 504 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 122/123 places, 242/252 transitions.
Applied a total of 0 rules in 4 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 536 ms. Remains : 122/123 places, 242/252 transitions.
Support contains 20 out of 122 places after structural reductions.
[2023-03-11 17:11:59] [INFO ] Flatten gal took : 36 ms
[2023-03-11 17:11:59] [INFO ] Flatten gal took : 17 ms
[2023-03-11 17:11:59] [INFO ] Input system was already deterministic with 242 transitions.
Finished random walk after 997 steps, including 0 resets, run visited all 15 properties in 62 ms. (steps per millisecond=16 )
Computed a total of 2 stabilizing places and 1 stable transitions
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(F(p0)))'
Support contains 2 out of 122 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Applied a total of 0 rules in 4 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
// Phase 1: matrix 242 rows 122 cols
[2023-03-11 17:11:59] [INFO ] Computed 11 place invariants in 4 ms
[2023-03-11 17:11:59] [INFO ] Implicit Places using invariants in 81 ms returned []
[2023-03-11 17:11:59] [INFO ] Invariant cache hit.
[2023-03-11 17:11:59] [INFO ] State equation strengthened by 50 read => feed constraints.
[2023-03-11 17:12:00] [INFO ] Implicit Places using invariants and state equation in 134 ms returned []
Implicit Place search using SMT with State Equation took 217 ms to find 0 implicit places.
[2023-03-11 17:12:00] [INFO ] Invariant cache hit.
[2023-03-11 17:12:00] [INFO ] Dead Transitions using invariants and state equation in 129 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 352 ms. Remains : 122/122 places, 242/242 transitions.
Stuttering acceptance computed with spot in 198 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-02 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(OR (EQ s121 0) (EQ s74 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null][false, false]]
Product exploration explored 100000 steps with 353 reset in 345 ms.
Stack based approach found an accepted trace after 4 steps with 0 reset with depth 5 and stack size 5 in 1 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-02 FALSE TECHNIQUES STACK_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-02 finished in 944 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(p1))))'
Support contains 4 out of 122 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Graph (trivial) has 104 edges and 122 vertex of which 30 / 122 are part of one of the 10 SCC in 5 ms
Free SCC test removed 20 places
Ensure Unique test removed 56 transitions
Reduce isomorphic transitions removed 56 transitions.
Reduce places removed 1 places and 1 transitions.
Reduce places removed 1 places and 0 transitions.
Graph (trivial) has 130 edges and 100 vertex of which 82 / 100 are part of one of the 12 SCC in 0 ms
Free SCC test removed 70 places
Drop transitions removed 2 transitions
Trivial Post-agglo rules discarded 2 transitions
Performed 2 trivial Post agglomeration. Transition count delta: 2
Iterating post reduction 0 with 4 rules applied. Total rules applied 5 place count 30 transition count 183
Reduce places removed 9 places and 0 transitions.
Ensure Unique test removed 146 transitions
Reduce isomorphic transitions removed 146 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 156 rules applied. Total rules applied 161 place count 21 transition count 36
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 162 place count 20 transition count 36
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 1 Pre rules applied. Total rules applied 162 place count 20 transition count 35
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 164 place count 19 transition count 35
Discarding 2 places :
Symmetric choice reduction at 3 with 2 rule applications. Total rules 166 place count 17 transition count 31
Iterating global reduction 3 with 2 rules applied. Total rules applied 168 place count 17 transition count 31
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions removed 2 transitions
Trivial Post-agglo rules discarded 2 transitions
Performed 2 trivial Post agglomeration. Transition count delta: 2
Iterating post reduction 3 with 4 rules applied. Total rules applied 172 place count 17 transition count 27
Reduce places removed 2 places and 0 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Iterating post reduction 4 with 4 rules applied. Total rules applied 176 place count 15 transition count 25
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 5 with 2 rules applied. Total rules applied 178 place count 13 transition count 25
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 6 with 2 rules applied. Total rules applied 180 place count 12 transition count 24
Drop transitions removed 9 transitions
Redundant transition composition rules discarded 9 transitions
Iterating global reduction 6 with 9 rules applied. Total rules applied 189 place count 12 transition count 15
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Iterating post reduction 6 with 3 rules applied. Total rules applied 192 place count 12 transition count 12
Reduce places removed 3 places and 0 transitions.
Iterating post reduction 7 with 3 rules applied. Total rules applied 195 place count 9 transition count 12
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 8 with 1 Pre rules applied. Total rules applied 195 place count 9 transition count 11
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 8 with 2 rules applied. Total rules applied 197 place count 8 transition count 11
Applied a total of 197 rules in 25 ms. Remains 8 /122 variables (removed 114) and now considering 11/242 (removed 231) transitions.
// Phase 1: matrix 11 rows 8 cols
[2023-03-11 17:12:00] [INFO ] Computed 3 place invariants in 1 ms
[2023-03-11 17:12:00] [INFO ] Implicit Places using invariants in 30 ms returned []
[2023-03-11 17:12:00] [INFO ] Invariant cache hit.
[2023-03-11 17:12:00] [INFO ] Implicit Places using invariants and state equation in 29 ms returned []
Implicit Place search using SMT with State Equation took 61 ms to find 0 implicit places.
[2023-03-11 17:12:00] [INFO ] Redundant transitions in 1 ms returned []
[2023-03-11 17:12:00] [INFO ] Invariant cache hit.
[2023-03-11 17:12:00] [INFO ] Dead Transitions using invariants and state equation in 30 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 8/122 places, 11/242 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 124 ms. Remains : 8/122 places, 11/242 transitions.
Stuttering acceptance computed with spot in 141 ms :[(OR (NOT p0) (NOT p1)), (NOT p0), (NOT p1)]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-05 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p1), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p0:(AND (EQ s4 0) (EQ s6 1)), p1:(OR (EQ s2 0) (EQ s0 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null, null][true, true, true]]
Stuttering criterion allowed to conclude after 0 steps with 0 reset in 1 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-05 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-05 finished in 290 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((X(p0)&&(X(F(p2))||p1))))'
Support contains 5 out of 122 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Applied a total of 0 rules in 7 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
// Phase 1: matrix 242 rows 122 cols
[2023-03-11 17:12:01] [INFO ] Computed 11 place invariants in 1 ms
[2023-03-11 17:12:01] [INFO ] Implicit Places using invariants in 84 ms returned [121]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 86 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 121/122 places, 242/242 transitions.
Applied a total of 0 rules in 4 ms. Remains 121 /121 variables (removed 0) and now considering 242/242 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 97 ms. Remains : 121/122 places, 242/242 transitions.
Stuttering acceptance computed with spot in 143 ms :[(OR (NOT p0) (AND (NOT p1) (NOT p2))), (NOT p0), (NOT p2), true]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-07 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=true, acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={} source=1 dest: 3}], [{ cond=(NOT p2), acceptance={0} source=2 dest: 2}], [{ cond=true, acceptance={0} source=3 dest: 3}]], initial=0, aps=[p1:(OR (EQ s43 1) (EQ s110 0) (EQ s89 1)), p0:(AND (EQ s17 0) (EQ s92 1)), p2:(OR (EQ s110 0) (EQ s89 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-07 finished in 260 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(X(p0))))'
Support contains 2 out of 122 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Applied a total of 0 rules in 4 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
[2023-03-11 17:12:01] [INFO ] Invariant cache hit.
[2023-03-11 17:12:01] [INFO ] Implicit Places using invariants in 84 ms returned [121]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 96 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 121/122 places, 242/242 transitions.
Applied a total of 0 rules in 4 ms. Remains 121 /121 variables (removed 0) and now considering 242/242 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 104 ms. Remains : 121/122 places, 242/242 transitions.
Stuttering acceptance computed with spot in 172 ms :[(NOT p0), (NOT p0), (NOT p0), (NOT p0), true]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-08 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={} source=0 dest: 4}], [{ cond=true, acceptance={} source=1 dest: 0}], [{ cond=true, acceptance={} source=2 dest: 1}], [{ cond=true, acceptance={} source=3 dest: 2}], [{ cond=true, acceptance={0} source=4 dest: 4}]], initial=3, aps=[p0:(AND (EQ s34 0) (EQ s98 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null][false, false, false, false, false]]
Entered a terminal (fully accepting) state of product in 3 steps with 0 reset in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-08 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-08 finished in 293 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X((p0&&G(p1))))'
Support contains 3 out of 122 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Applied a total of 0 rules in 4 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
[2023-03-11 17:12:01] [INFO ] Invariant cache hit.
[2023-03-11 17:12:01] [INFO ] Implicit Places using invariants in 77 ms returned [121]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 78 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 121/122 places, 242/242 transitions.
Applied a total of 0 rules in 8 ms. Remains 121 /121 variables (removed 0) and now considering 242/242 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 90 ms. Remains : 121/122 places, 242/242 transitions.
Stuttering acceptance computed with spot in 146 ms :[true, (OR (NOT p0) (NOT p1)), (NOT p1), (OR (NOT p0) (NOT p1))]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-09 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 3}], [{ cond=(NOT p1), acceptance={} source=2 dest: 0}, { cond=p1, acceptance={} source=2 dest: 2}], [{ cond=(OR (NOT p0) (NOT p1)), acceptance={} source=3 dest: 0}, { cond=(AND p0 p1), acceptance={} source=3 dest: 2}]], initial=1, aps=[p1:(AND (EQ s42 0) (EQ s102 1)), p0:(EQ s20 1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-09 finished in 251 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(p0)))'
Support contains 2 out of 122 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Graph (trivial) has 106 edges and 122 vertex of which 30 / 122 are part of one of the 10 SCC in 0 ms
Free SCC test removed 20 places
Ensure Unique test removed 56 transitions
Reduce isomorphic transitions removed 56 transitions.
Reduce places removed 1 places and 1 transitions.
Reduce places removed 1 places and 0 transitions.
Graph (trivial) has 134 edges and 100 vertex of which 90 / 100 are part of one of the 12 SCC in 1 ms
Free SCC test removed 78 places
Drop transitions removed 2 transitions
Trivial Post-agglo rules discarded 2 transitions
Performed 2 trivial Post agglomeration. Transition count delta: 2
Iterating post reduction 0 with 4 rules applied. Total rules applied 5 place count 22 transition count 183
Reduce places removed 10 places and 0 transitions.
Ensure Unique test removed 161 transitions
Reduce isomorphic transitions removed 161 transitions.
Iterating post reduction 1 with 171 rules applied. Total rules applied 176 place count 12 transition count 22
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 178 place count 10 transition count 18
Iterating global reduction 2 with 2 rules applied. Total rules applied 180 place count 10 transition count 18
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions removed 2 transitions
Trivial Post-agglo rules discarded 2 transitions
Performed 2 trivial Post agglomeration. Transition count delta: 2
Iterating post reduction 2 with 4 rules applied. Total rules applied 184 place count 10 transition count 14
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 3 with 2 rules applied. Total rules applied 186 place count 8 transition count 14
Drop transitions removed 5 transitions
Redundant transition composition rules discarded 5 transitions
Iterating global reduction 4 with 5 rules applied. Total rules applied 191 place count 8 transition count 9
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Iterating post reduction 4 with 2 rules applied. Total rules applied 193 place count 8 transition count 7
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 5 with 2 rules applied. Total rules applied 195 place count 6 transition count 7
Performed 2 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 6 with 2 Pre rules applied. Total rules applied 195 place count 6 transition count 5
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 6 with 4 rules applied. Total rules applied 199 place count 4 transition count 5
Applied a total of 199 rules in 11 ms. Remains 4 /122 variables (removed 118) and now considering 5/242 (removed 237) transitions.
// Phase 1: matrix 5 rows 4 cols
[2023-03-11 17:12:01] [INFO ] Computed 2 place invariants in 0 ms
[2023-03-11 17:12:01] [INFO ] Implicit Places using invariants in 18 ms returned []
[2023-03-11 17:12:01] [INFO ] Invariant cache hit.
[2023-03-11 17:12:01] [INFO ] Implicit Places using invariants and state equation in 22 ms returned []
Implicit Place search using SMT with State Equation took 54 ms to find 0 implicit places.
[2023-03-11 17:12:01] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-11 17:12:01] [INFO ] Invariant cache hit.
[2023-03-11 17:12:01] [INFO ] Dead Transitions using invariants and state equation in 19 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 4/122 places, 5/242 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 95 ms. Remains : 4/122 places, 5/242 transitions.
Stuttering acceptance computed with spot in 91 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-10 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(OR (EQ s2 0) (EQ s0 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null][true, true]]
Stuttering criterion allowed to conclude after 1 steps with 0 reset in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-10 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-10 finished in 204 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F((G(p0)||G(!p0))))'
Support contains 1 out of 122 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Graph (trivial) has 108 edges and 122 vertex of which 30 / 122 are part of one of the 10 SCC in 0 ms
Free SCC test removed 20 places
Ensure Unique test removed 56 transitions
Reduce isomorphic transitions removed 56 transitions.
Reduce places removed 1 places and 1 transitions.
Reduce places removed 1 places and 0 transitions.
Graph (trivial) has 137 edges and 100 vertex of which 96 / 100 are part of one of the 10 SCC in 0 ms
Free SCC test removed 86 places
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 3 rules applied. Total rules applied 4 place count 14 transition count 184
Reduce places removed 10 places and 0 transitions.
Ensure Unique test removed 177 transitions
Reduce isomorphic transitions removed 177 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 188 rules applied. Total rules applied 192 place count 4 transition count 6
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 193 place count 3 transition count 6
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 3 with 2 rules applied. Total rules applied 195 place count 3 transition count 4
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 3 with 1 rules applied. Total rules applied 196 place count 3 transition count 3
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 4 with 1 rules applied. Total rules applied 197 place count 2 transition count 3
Applied a total of 197 rules in 19 ms. Remains 2 /122 variables (removed 120) and now considering 3/242 (removed 239) transitions.
// Phase 1: matrix 3 rows 2 cols
[2023-03-11 17:12:02] [INFO ] Computed 1 place invariants in 0 ms
[2023-03-11 17:12:02] [INFO ] Implicit Places using invariants in 17 ms returned []
[2023-03-11 17:12:02] [INFO ] Invariant cache hit.
[2023-03-11 17:12:02] [INFO ] Implicit Places using invariants and state equation in 22 ms returned []
Implicit Place search using SMT with State Equation took 41 ms to find 0 implicit places.
[2023-03-11 17:12:02] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-11 17:12:02] [INFO ] Invariant cache hit.
[2023-03-11 17:12:02] [INFO ] Dead Transitions using invariants and state equation in 21 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 2/122 places, 3/242 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 87 ms. Remains : 2/122 places, 3/242 transitions.
Stuttering acceptance computed with spot in 33 ms :[false]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-11 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={0} source=0 dest: 0}, { cond=p0, acceptance={1} source=0 dest: 0}]], initial=0, aps=[p0:(EQ s0 1)], nbAcceptance=2, properties=[trans-labels, explicit-labels, trans-acc, colored, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null][true]]
Product exploration explored 100000 steps with 0 reset in 104 ms.
Stack based approach found an accepted trace after 5 steps with 0 reset with depth 6 and stack size 2 in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-11 FALSE TECHNIQUES STACK_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-11 finished in 236 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(p0)))'
Support contains 1 out of 122 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Graph (trivial) has 108 edges and 122 vertex of which 30 / 122 are part of one of the 10 SCC in 0 ms
Free SCC test removed 20 places
Ensure Unique test removed 56 transitions
Reduce isomorphic transitions removed 56 transitions.
Reduce places removed 1 places and 1 transitions.
Reduce places removed 1 places and 0 transitions.
Graph (trivial) has 137 edges and 100 vertex of which 96 / 100 are part of one of the 10 SCC in 0 ms
Free SCC test removed 86 places
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 0 with 3 rules applied. Total rules applied 4 place count 14 transition count 184
Reduce places removed 10 places and 0 transitions.
Ensure Unique test removed 177 transitions
Reduce isomorphic transitions removed 177 transitions.
Iterating post reduction 1 with 187 rules applied. Total rules applied 191 place count 4 transition count 7
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 1 Pre rules applied. Total rules applied 191 place count 4 transition count 6
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 2 with 2 rules applied. Total rules applied 193 place count 3 transition count 6
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 2 with 2 rules applied. Total rules applied 195 place count 3 transition count 4
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 1 Pre rules applied. Total rules applied 195 place count 3 transition count 3
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 2 with 2 rules applied. Total rules applied 197 place count 2 transition count 3
Applied a total of 197 rules in 5 ms. Remains 2 /122 variables (removed 120) and now considering 3/242 (removed 239) transitions.
// Phase 1: matrix 3 rows 2 cols
[2023-03-11 17:12:02] [INFO ] Computed 1 place invariants in 0 ms
[2023-03-11 17:12:02] [INFO ] Implicit Places using invariants in 16 ms returned []
[2023-03-11 17:12:02] [INFO ] Invariant cache hit.
[2023-03-11 17:12:02] [INFO ] Implicit Places using invariants and state equation in 33 ms returned []
Implicit Place search using SMT with State Equation took 53 ms to find 0 implicit places.
[2023-03-11 17:12:02] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-11 17:12:02] [INFO ] Invariant cache hit.
[2023-03-11 17:12:02] [INFO ] Dead Transitions using invariants and state equation in 21 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 2/122 places, 3/242 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 95 ms. Remains : 2/122 places, 3/242 transitions.
Stuttering acceptance computed with spot in 42 ms :[(NOT p0)]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-13 automaton TGBA Formula[mat=[[{ cond=p0, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={0} source=0 dest: 0}]], initial=0, aps=[p0:(EQ s0 1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null][true]]
Stuttering criterion allowed to conclude after 0 steps with 0 reset in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-13 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-13 finished in 154 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(F((G(F(!p0))||(p0&&F(!p0))))))'
Support contains 2 out of 122 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Applied a total of 0 rules in 3 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
// Phase 1: matrix 242 rows 122 cols
[2023-03-11 17:12:02] [INFO ] Computed 11 place invariants in 1 ms
[2023-03-11 17:12:02] [INFO ] Implicit Places using invariants in 140 ms returned [121]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 141 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 121/122 places, 242/242 transitions.
Applied a total of 0 rules in 3 ms. Remains 121 /121 variables (removed 0) and now considering 242/242 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 148 ms. Remains : 121/122 places, 242/242 transitions.
Stuttering acceptance computed with spot in 212 ms :[p0, p0, p0]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-14 automaton TGBA Formula[mat=[[{ cond=p0, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=p0, acceptance={} source=2 dest: 0}, { cond=(NOT p0), acceptance={} source=2 dest: 2}]], initial=1, aps=[p0:(OR (EQ s68 0) (EQ s119 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 836 reset in 317 ms.
Stack based approach found an accepted trace after 16 steps with 0 reset with depth 17 and stack size 17 in 0 ms.
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-14 FALSE TECHNIQUES STACK_TEST
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-14 finished in 692 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(p0))'
Support contains 1 out of 122 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 122/122 places, 242/242 transitions.
Applied a total of 0 rules in 3 ms. Remains 122 /122 variables (removed 0) and now considering 242/242 (removed 0) transitions.
[2023-03-11 17:12:03] [INFO ] Invariant cache hit.
[2023-03-11 17:12:03] [INFO ] Implicit Places using invariants in 68 ms returned [121]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 81 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 121/122 places, 242/242 transitions.
Applied a total of 0 rules in 1 ms. Remains 121 /121 variables (removed 0) and now considering 242/242 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 85 ms. Remains : 121/122 places, 242/242 transitions.
Stuttering acceptance computed with spot in 135 ms :[(NOT p0), (NOT p0), true]
Running random walk in product with property : FlexibleBarrier-PT-10a-LTLCardinality-15 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={} source=0 dest: 2}], [{ cond=true, acceptance={} source=1 dest: 0}], [{ cond=true, acceptance={0} source=2 dest: 2}]], initial=1, aps=[p0:(OR (EQ s13 0) (NEQ s13 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 50000 reset in 301 ms.
Product exploration explored 100000 steps with 50000 reset in 301 ms.
Computed a total of 1 stabilizing places and 1 stable transitions
Computed a total of 1 stabilizing places and 1 stable transitions
Knowledge obtained : [p0, (X p0), true]
False Knowledge obtained : []
Property proved to be true thanks to knowledge :(X p0)
Knowledge based reduction with 3 factoid took 86 ms. Reduced automaton from 3 states, 3 edges and 1 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA FlexibleBarrier-PT-10a-LTLCardinality-15 TRUE TECHNIQUES KNOWLEDGE
Treatment of property FlexibleBarrier-PT-10a-LTLCardinality-15 finished in 933 ms.
All properties solved by simple procedures.
Total runtime 5570 ms.
ITS solved all properties within timeout

BK_STOP 1678554724982

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

+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination LTLCardinality -timeout 360 -rebuildPNML

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="FlexibleBarrier-PT-10a"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="ltsminxred"
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 2-5348"
echo " Executing tool ltsminxred"
echo " Input is FlexibleBarrier-PT-10a, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r169-tall-167838856000491"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/FlexibleBarrier-PT-10a.tgz
mv FlexibleBarrier-PT-10a execution
cd execution
if [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "UpperBounds" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] || [ "LTLCardinality" = "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 [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '' LTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLCardinality"
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 ;