Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2024-input.r197-tall-171640624900117.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-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 2-5568
Executing tool gold2023
Input is FunctionPointer-PT-a016, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r197-tall-171640624900117
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 544K
-rw-r--r-- 1 mcc users 6.5K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 71K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.3K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 77K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.5K May 19 07:09 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K May 19 15:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K May 19 07:18 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 19 18:23 LTLFireability.xml
-rw-r--r-- 1 mcc users 13K Apr 11 16:08 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 146K Apr 11 16:08 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.4K Apr 11 16:07 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 86K Apr 11 16:07 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 19 07:11 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K May 19 15:26 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:42 equiv_col
-rw-r--r-- 1 mcc users 5 May 18 16:42 instance
-rw-r--r-- 1 mcc users 6 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 34K May 18 16:42 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 FunctionPointer-PT-a016-LTLCardinality-00
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-01
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-02
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-03
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-04
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-05
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-06
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-07
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-08
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-09
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-10
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-11
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-12
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-13
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-14
FORMULA_NAME FunctionPointer-PT-a016-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1716507073941

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=gold2023
BK_EXAMINATION=LTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=FunctionPointer-PT-a016
Not applying reductions.
Model is PT
LTLCardinality PT
Running Version 202304061127
[2024-05-23 23:31:15] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2024-05-23 23:31:15] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-23 23:31:15] [INFO ] Load time of PNML (sax parser for PT used): 35 ms
[2024-05-23 23:31:15] [INFO ] Transformed 40 places.
[2024-05-23 23:31:15] [INFO ] Transformed 70 transitions.
[2024-05-23 23:31:15] [INFO ] Parsed PT model containing 40 places and 70 transitions and 284 arcs in 94 ms.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 7 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 6 formulas.
Deduced a syphon composed of 6 places in 1 ms
Reduce places removed 6 places and 4 transitions.
FORMULA FunctionPointer-PT-a016-LTLCardinality-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a016-LTLCardinality-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a016-LTLCardinality-06 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a016-LTLCardinality-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a016-LTLCardinality-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a016-LTLCardinality-14 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 26 out of 34 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 34/34 places, 66/66 transitions.
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 33 transition count 66
Applied a total of 1 rules in 12 ms. Remains 33 /34 variables (removed 1) and now considering 66/66 (removed 0) transitions.
[2024-05-23 23:31:15] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
// Phase 1: matrix 46 rows 33 cols
[2024-05-23 23:31:15] [INFO ] Computed 4 invariants in 7 ms
[2024-05-23 23:31:15] [INFO ] Implicit Places using invariants in 120 ms returned []
[2024-05-23 23:31:15] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
[2024-05-23 23:31:15] [INFO ] Invariant cache hit.
[2024-05-23 23:31:15] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:15] [INFO ] Implicit Places using invariants and state equation in 68 ms returned []
Implicit Place search using SMT with State Equation took 217 ms to find 0 implicit places.
[2024-05-23 23:31:15] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
[2024-05-23 23:31:15] [INFO ] Invariant cache hit.
[2024-05-23 23:31:15] [INFO ] Dead Transitions using invariants and state equation in 52 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 33/34 places, 66/66 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 283 ms. Remains : 33/34 places, 66/66 transitions.
Support contains 26 out of 33 places after structural reductions.
[2024-05-23 23:31:16] [INFO ] Flatten gal took : 21 ms
[2024-05-23 23:31:16] [INFO ] Flatten gal took : 9 ms
[2024-05-23 23:31:16] [INFO ] Input system was already deterministic with 66 transitions.
Incomplete random walk after 10000 steps, including 27 resets, run finished after 152 ms. (steps per millisecond=65 ) properties (out of 25) seen :23
Incomplete Best-First random walk after 10001 steps, including 46 resets, run finished after 30 ms. (steps per millisecond=333 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 4 resets, run finished after 24 ms. (steps per millisecond=416 ) properties (out of 2) seen :0
Running SMT prover for 2 properties.
[2024-05-23 23:31:16] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
[2024-05-23 23:31:16] [INFO ] Invariant cache hit.
[2024-05-23 23:31:16] [INFO ] [Real]Absence check using 3 positive place invariants in 3 ms returned sat
[2024-05-23 23:31:16] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2024-05-23 23:31:16] [INFO ] After 39ms SMT Verify possible using all constraints in real domain returned unsat :2 sat :0
Fused 2 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
Successfully simplified 2 atomic propositions for a total of 10 simplifications.
FORMULA FunctionPointer-PT-a016-LTLCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a016-LTLCardinality-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Computed a total of 3 stabilizing places and 8 stable transitions
Graph (complete) has 150 edges and 33 vertex of which 31 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.2 ms
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((G(F(p0))||G(p1)))'
Support contains 2 out of 33 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Graph (complete) has 150 edges and 33 vertex of which 31 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.1 ms
Discarding 2 places :
Also discarding 0 output transitions
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 0 with 2 rules applied. Total rules applied 3 place count 31 transition count 64
Applied a total of 3 rules in 12 ms. Remains 31 /33 variables (removed 2) and now considering 64/66 (removed 2) transitions.
[2024-05-23 23:31:16] [INFO ] Flow matrix only has 45 transitions (discarded 19 similar events)
// Phase 1: matrix 45 rows 31 cols
[2024-05-23 23:31:16] [INFO ] Computed 2 invariants in 2 ms
[2024-05-23 23:31:16] [INFO ] Implicit Places using invariants in 50 ms returned []
[2024-05-23 23:31:16] [INFO ] Flow matrix only has 45 transitions (discarded 19 similar events)
[2024-05-23 23:31:16] [INFO ] Invariant cache hit.
[2024-05-23 23:31:16] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:16] [INFO ] Implicit Places using invariants and state equation in 56 ms returned []
Implicit Place search using SMT with State Equation took 110 ms to find 0 implicit places.
[2024-05-23 23:31:16] [INFO ] Redundant transitions in 1 ms returned []
[2024-05-23 23:31:16] [INFO ] Flow matrix only has 45 transitions (discarded 19 similar events)
[2024-05-23 23:31:16] [INFO ] Invariant cache hit.
[2024-05-23 23:31:16] [INFO ] Dead Transitions using invariants and state equation in 55 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 31/33 places, 64/66 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 188 ms. Remains : 31/33 places, 64/66 transitions.
ANTLR Tool version 4.9.3 used for code generation does not match the current runtime version 4.7.2ANTLR Runtime version 4.9.3 used for parser compilation does not match the current runtime version 4.7.2ANTLR Tool version 4.9.3 used for code generation does not match the current runtime version 4.7.2ANTLR Runtime version 4.9.3 used for parser compilation does not match the current runtime version 4.7.2Stuttering acceptance computed with spot in 218 ms :[(AND (NOT p1) (NOT p0)), (NOT p0), (NOT p0)]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-00 automaton TGBA Formula[mat=[[{ cond=p1, acceptance={} source=0 dest: 0}, { cond=(AND (NOT p0) (NOT p1)), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p0), acceptance={} source=2 dest: 1}, { cond=true, acceptance={} source=2 dest: 2}]], initial=0, aps=[p1:(LEQ 2 s16), p0:(LEQ 1 s7)], 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 512 steps with 4 reset in 12 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-00 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-00 finished in 466 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F((p0&&F((p1 U (G(p1)||(G(p3)&&p2)))))))'
Support contains 4 out of 33 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Graph (complete) has 150 edges and 33 vertex of which 31 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.1 ms
Discarding 2 places :
Also discarding 0 output transitions
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 2 place count 30 transition count 64
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 30 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 5 place count 30 transition count 62
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 1 with 2 rules applied. Total rules applied 7 place count 30 transition count 60
Applied a total of 7 rules in 13 ms. Remains 30 /33 variables (removed 3) and now considering 60/66 (removed 6) transitions.
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
// Phase 1: matrix 43 rows 30 cols
[2024-05-23 23:31:17] [INFO ] Computed 2 invariants in 6 ms
[2024-05-23 23:31:17] [INFO ] Implicit Places using invariants in 50 ms returned []
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
[2024-05-23 23:31:17] [INFO ] Invariant cache hit.
[2024-05-23 23:31:17] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:17] [INFO ] Implicit Places using invariants and state equation in 61 ms returned []
Implicit Place search using SMT with State Equation took 112 ms to find 0 implicit places.
[2024-05-23 23:31:17] [INFO ] Redundant transitions in 0 ms returned []
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
[2024-05-23 23:31:17] [INFO ] Invariant cache hit.
[2024-05-23 23:31:17] [INFO ] Dead Transitions using invariants and state equation in 40 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 30/33 places, 60/66 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 173 ms. Remains : 30/33 places, 60/66 transitions.
Stuttering acceptance computed with spot in 270 ms :[(OR (NOT p0) (AND (NOT p1) (NOT p2)) (AND (NOT p1) (NOT p3))), (OR (AND (NOT p1) (NOT p2)) (AND (NOT p1) (NOT p3))), (AND (NOT p1) (NOT p3))]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-01 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={0, 1} source=0 dest: 0}, { cond=(OR (AND p0 (NOT p2)) (AND p0 (NOT p3))), acceptance={} source=0 dest: 1}, { cond=(AND p0 p2 p3), acceptance={} source=0 dest: 2}], [{ cond=(OR (AND (NOT p2) p1) (AND (NOT p3) p1)), acceptance={0} source=1 dest: 1}, { cond=(OR (AND (NOT p2) (NOT p1)) (AND (NOT p3) (NOT p1))), acceptance={0, 1} source=1 dest: 1}, { cond=(AND p2 p3 p1), acceptance={} source=1 dest: 2}, { cond=(AND p2 p3 (NOT p1)), acceptance={1} source=1 dest: 2}], [{ cond=(AND (NOT p3) p1), acceptance={0} source=2 dest: 1}, { cond=(AND (NOT p3) (NOT p1)), acceptance={0, 1} source=2 dest: 1}, { cond=(AND p3 p1), acceptance={} source=2 dest: 2}, { cond=(AND p3 (NOT p1)), acceptance={1} source=2 dest: 2}]], initial=0, aps=[p0:(OR (LEQ 3 s8) (LEQ s10 s6) (LEQ s5 s6)), p2:(AND (GT 3 s8) (GT 1 s8)), p3:(GT s10 s6), p1:(GT 1 s8)], nbAcceptance=2, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null, null, null][true, true, true]]
Stuttering criterion allowed to conclude after 30 steps with 0 reset in 1 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-01 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-01 finished in 462 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((G(F((p0||G(p1))))||(F((p0||G(p1)))&&F((G(F(!p0))||(p2&&F(!p0)))))))'
Support contains 3 out of 33 places. Attempting structural reductions.
Property had overlarge support with respect to TGBA, discarding it for now.
Starting structural reductions in SI_LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Graph (complete) has 150 edges and 33 vertex of which 31 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.1 ms
Discarding 2 places :
Also discarding 0 output transitions
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 2 place count 30 transition count 64
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 30 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 5 place count 30 transition count 62
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 1 with 2 rules applied. Total rules applied 7 place count 30 transition count 60
Applied a total of 7 rules in 12 ms. Remains 30 /33 variables (removed 3) and now considering 60/66 (removed 6) transitions.
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
[2024-05-23 23:31:17] [INFO ] Invariant cache hit.
[2024-05-23 23:31:17] [INFO ] Implicit Places using invariants in 36 ms returned []
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
[2024-05-23 23:31:17] [INFO ] Invariant cache hit.
[2024-05-23 23:31:17] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:17] [INFO ] Implicit Places using invariants and state equation in 42 ms returned []
Implicit Place search using SMT with State Equation took 80 ms to find 0 implicit places.
[2024-05-23 23:31:17] [INFO ] Redundant transitions in 0 ms returned []
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
[2024-05-23 23:31:17] [INFO ] Invariant cache hit.
[2024-05-23 23:31:17] [INFO ] Dead Transitions using invariants and state equation in 40 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 30/33 places, 60/66 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 138 ms. Remains : 30/33 places, 60/66 transitions.
Stuttering acceptance computed with spot in 78 ms :[(AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1))]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-02 automaton TGBA Formula[mat=[[{ cond=(AND (NOT p0) p1), acceptance={} source=0 dest: 0}, { cond=(AND (NOT p0) (NOT p1)), acceptance={} source=0 dest: 1}], [{ cond=(AND (NOT p0) p1), acceptance={} source=1 dest: 1}, { cond=(AND (NOT p0) (NOT p1)), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(GT 3 s12), p1:(GT s11 s24)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null, null][true, true]]
Initial state of product has no viable successors after 0 steps with 0 reset in 0 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-02 TRUE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-02 finished in 235 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(F(((p0||X(F(p1))) U (G((p0||X(F(p1))))||(p2&&(p0||X(F(p1))))))))))'
Support contains 6 out of 33 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 2 place count 31 transition count 66
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 3 place count 30 transition count 64
Iterating global reduction 1 with 1 rules applied. Total rules applied 4 place count 30 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 1 with 2 rules applied. Total rules applied 6 place count 30 transition count 62
Applied a total of 6 rules in 9 ms. Remains 30 /33 variables (removed 3) and now considering 62/66 (removed 4) transitions.
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
// Phase 1: matrix 44 rows 30 cols
[2024-05-23 23:31:17] [INFO ] Computed 2 invariants in 1 ms
[2024-05-23 23:31:17] [INFO ] Implicit Places using invariants in 45 ms returned []
[2024-05-23 23:31:17] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:17] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants and state equation in 37 ms returned []
Implicit Place search using SMT with State Equation took 85 ms to find 0 implicit places.
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] Dead Transitions using invariants and state equation in 41 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 30/33 places, 62/66 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 137 ms. Remains : 30/33 places, 62/66 transitions.
Stuttering acceptance computed with spot in 195 ms :[(AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1))]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-03 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p2), acceptance={} source=2 dest: 2}, { cond=(NOT p0), acceptance={} source=2 dest: 3}], [{ cond=(AND (NOT p2) p0 (NOT p1)), acceptance={} source=3 dest: 3}, { cond=(AND (NOT p0) (NOT p1)), acceptance={0} source=3 dest: 3}]], initial=0, aps=[p2:(GT s3 s16), p0:(GT s22 s29), p1:(GT s9 s0)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive], stateDesc=[null, null, null, null][false, false, false, false]]
Stuttering criterion allowed to conclude after 507 steps with 51 reset in 4 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-03 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-03 finished in 360 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F(p0)&&X(G(p1))))'
Support contains 4 out of 33 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 2 place count 31 transition count 66
Applied a total of 2 rules in 2 ms. Remains 31 /33 variables (removed 2) and now considering 66/66 (removed 0) transitions.
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
// Phase 1: matrix 46 rows 31 cols
[2024-05-23 23:31:18] [INFO ] Computed 2 invariants in 3 ms
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants in 35 ms returned []
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants and state equation in 41 ms returned []
Implicit Place search using SMT with State Equation took 77 ms to find 0 implicit places.
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] Dead Transitions using invariants and state equation in 42 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 31/33 places, 66/66 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 122 ms. Remains : 31/33 places, 66/66 transitions.
Stuttering acceptance computed with spot in 143 ms :[(NOT p1), true, (OR (NOT p1) (NOT p0)), (OR (NOT p1) (NOT p0))]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-07 automaton TGBA Formula[mat=[[{ cond=p1, acceptance={} source=0 dest: 0}, { cond=(NOT p1), acceptance={} source=0 dest: 1}], [{ cond=true, acceptance={0} source=1 dest: 1}], [{ cond=p0, acceptance={} source=2 dest: 0}, { cond=(NOT p0), acceptance={} source=2 dest: 3}], [{ cond=(AND p0 p1), acceptance={0} source=3 dest: 0}, { cond=(NOT p1), acceptance={0} source=3 dest: 1}, { cond=(AND (NOT p0) p1), acceptance={0} source=3 dest: 3}]], initial=2, aps=[p1:(GT 3 s15), p0:(AND (GT 1 s10) (GT s6 s13))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, 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 2880 steps with 29 reset in 15 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-07 finished in 298 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F(p0)&&(F(G(p1)) U G(p2))))'
Support contains 5 out of 33 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Graph (complete) has 150 edges and 33 vertex of which 31 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.0 ms
Discarding 2 places :
Also discarding 0 output transitions
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 2 place count 30 transition count 64
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 30 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 5 place count 30 transition count 62
Applied a total of 5 rules in 8 ms. Remains 30 /33 variables (removed 3) and now considering 62/66 (removed 4) transitions.
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
// Phase 1: matrix 44 rows 30 cols
[2024-05-23 23:31:18] [INFO ] Computed 2 invariants in 0 ms
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants in 31 ms returned []
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants and state equation in 37 ms returned []
Implicit Place search using SMT with State Equation took 70 ms to find 0 implicit places.
[2024-05-23 23:31:18] [INFO ] Redundant transitions in 1 ms returned []
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] Dead Transitions using invariants and state equation in 41 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 30/33 places, 62/66 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 140 ms. Remains : 30/33 places, 62/66 transitions.
Stuttering acceptance computed with spot in 151 ms :[(OR (NOT p2) (NOT p0)), (NOT p0), (NOT p1), (NOT p2)]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-08 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=(NOT p2), acceptance={} source=0 dest: 2}, { cond=true, acceptance={} source=0 dest: 3}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=p1, acceptance={} source=2 dest: 2}, { cond=(NOT p1), acceptance={0} source=2 dest: 2}], [{ cond=(NOT p2), acceptance={} source=3 dest: 2}, { cond=p2, acceptance={} source=3 dest: 3}, { cond=(NOT p2), acceptance={0} source=3 dest: 3}]], initial=0, aps=[p0:(LEQ s14 s29), p2:(GT 2 s20), p1:(GT s25 s2)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null, null][true, true, true, true]]
Stuttering criterion allowed to conclude after 2881 steps with 43 reset in 12 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-08 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-08 finished in 319 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(X(X(X(G((p0&&F(p1)))))))))'
Support contains 4 out of 33 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 32 transition count 66
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 2 place count 31 transition count 64
Iterating global reduction 1 with 1 rules applied. Total rules applied 3 place count 31 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 1 with 2 rules applied. Total rules applied 5 place count 31 transition count 62
Applied a total of 5 rules in 4 ms. Remains 31 /33 variables (removed 2) and now considering 62/66 (removed 4) transitions.
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
// Phase 1: matrix 44 rows 31 cols
[2024-05-23 23:31:18] [INFO ] Computed 3 invariants in 1 ms
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants in 27 ms returned []
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:18] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:18] [INFO ] Implicit Places using invariants and state equation in 37 ms returned []
Implicit Place search using SMT with State Equation took 73 ms to find 0 implicit places.
[2024-05-23 23:31:18] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:18] [INFO ] Invariant cache hit.
[2024-05-23 23:31:19] [INFO ] Dead Transitions using invariants and state equation in 35 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 31/33 places, 62/66 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 112 ms. Remains : 31/33 places, 62/66 transitions.
Stuttering acceptance computed with spot in 314 ms :[(OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), true, (NOT p1)]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-10 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=true, acceptance={} source=2 dest: 3}], [{ cond=true, acceptance={} source=3 dest: 4}], [{ cond=true, acceptance={} source=4 dest: 5}], [{ cond=p0, acceptance={} source=5 dest: 5}, { cond=(NOT p0), acceptance={} source=5 dest: 6}, { cond=(AND p0 (NOT p1)), acceptance={} source=5 dest: 7}], [{ cond=true, acceptance={0} source=6 dest: 6}], [{ cond=(NOT p1), acceptance={0} source=7 dest: 7}]], initial=0, aps=[p0:(LEQ s6 s0), p1:(LEQ s17 s5)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null, null, null, null][false, false, false, false, false, false, false, false]]
Entered a terminal (fully accepting) state of product in 83 steps with 2 reset in 1 ms.
FORMULA FunctionPointer-PT-a016-LTLCardinality-10 FALSE TECHNIQUES STUTTER_TEST
Treatment of property FunctionPointer-PT-a016-LTLCardinality-10 finished in 441 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202304061127/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(F((p0||X(p1)))))'
Support contains 3 out of 33 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 33/33 places, 66/66 transitions.
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 2 place count 31 transition count 66
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 3 place count 30 transition count 64
Iterating global reduction 1 with 1 rules applied. Total rules applied 4 place count 30 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 1 with 2 rules applied. Total rules applied 6 place count 30 transition count 62
Applied a total of 6 rules in 5 ms. Remains 30 /33 variables (removed 3) and now considering 62/66 (removed 4) transitions.
[2024-05-23 23:31:19] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
// Phase 1: matrix 44 rows 30 cols
[2024-05-23 23:31:19] [INFO ] Computed 2 invariants in 0 ms
[2024-05-23 23:31:19] [INFO ] Implicit Places using invariants in 33 ms returned []
[2024-05-23 23:31:19] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:19] [INFO ] Invariant cache hit.
[2024-05-23 23:31:19] [INFO ] State equation strengthened by 8 read => feed constraints.
[2024-05-23 23:31:19] [INFO ] Implicit Places using invariants and state equation in 38 ms returned []
Implicit Place search using SMT with State Equation took 84 ms to find 0 implicit places.
[2024-05-23 23:31:19] [INFO ] Flow matrix only has 44 transitions (discarded 18 similar events)
[2024-05-23 23:31:19] [INFO ] Invariant cache hit.
[2024-05-23 23:31:19] [INFO ] Dead Transitions using invariants and state equation in 35 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 30/33 places, 62/66 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 124 ms. Remains : 30/33 places, 62/66 transitions.
Stuttering acceptance computed with spot in 118 ms :[(AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1))]
Running random walk in product with property : FunctionPointer-PT-a016-LTLCardinality-12 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={} source=1 dest: 2}], [{ cond=(AND (NOT p0) (NOT p1)), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p0:(LEQ 1 s28), p1:(LEQ s4 s19)], 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 33333 reset in 168 ms.
Product exploration explored 100000 steps with 33333 reset in 162 ms.
Computed a total of 3 stabilizing places and 8 stable transitions
Computed a total of 3 stabilizing places and 8 stable transitions
Knowledge obtained : [(AND (NOT p0) p1), (X (NOT p0)), (X (X (NOT (AND (NOT p0) (NOT p1)))))]
False Knowledge obtained : []
Property proved to be true thanks to knowledge (Minato strategy)
Knowledge based reduction with 3 factoid took 13 ms. Reduced automaton from 3 states, 3 edges and 2 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA FunctionPointer-PT-a016-LTLCardinality-12 TRUE TECHNIQUES KNOWLEDGE
Treatment of property FunctionPointer-PT-a016-LTLCardinality-12 finished in 605 ms.
All properties solved by simple procedures.
Total runtime 4605 ms.

BK_STOP 1716507080968

--------------------
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
+ [[ LTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution LTLCardinality -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
+ 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:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202304061127.jar
+ VERSION=202304061127
+ echo 'Running Version 202304061127'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination LTLCardinality -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="FunctionPointer-PT-a016"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="gold2023"
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 2-5568"
echo " Executing tool gold2023"
echo " Input is FunctionPointer-PT-a016, 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 r197-tall-171640624900117"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/FunctionPointer-PT-a016.tgz
mv FunctionPointer-PT-a016 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 ;