Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2022-input.r028-tall-165251936000072.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2022-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 2-4028
Executing tool gold2021
Input is BridgeAndVehicles-PT-V20P10N20, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r028-tall-165251936000072
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 3.4M
-rw-r--r-- 1 mcc users 16K Apr 29 21:26 CTLCardinality.txt
-rw-r--r-- 1 mcc users 111K Apr 29 21:26 CTLCardinality.xml
-rw-r--r-- 1 mcc users 87K Apr 29 21:25 CTLFireability.txt
-rw-r--r-- 1 mcc users 359K Apr 29 21:25 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K May 10 09:33 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 6.5K May 9 07:07 LTLCardinality.txt
-rw-r--r-- 1 mcc users 32K May 9 07:07 LTLCardinality.xml
-rw-r--r-- 1 mcc users 97K May 9 07:07 LTLFireability.txt
-rw-r--r-- 1 mcc users 294K May 9 07:07 LTLFireability.xml
-rw-r--r-- 1 mcc users 22K Apr 29 21:38 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 153K Apr 29 21:38 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 271K Apr 29 21:37 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 1.1M Apr 29 21:37 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.9K May 9 07:07 UpperBounds.txt
-rw-r--r-- 1 mcc users 6.2K May 9 07:07 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 10 09:33 equiv_col
-rw-r--r-- 1 mcc users 10 May 10 09:33 instance
-rw-r--r-- 1 mcc users 6 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 782K May 10 09:33 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 BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-00
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-01
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-02
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-03
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-04
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-05
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-06
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-07
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-08
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-09
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-10
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-11
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-12
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-13
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-14
FORMULA_NAME BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1655076696081

Running Version 0
[2022-06-12 23:31:37] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2022-06-12 23:31:37] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-06-12 23:31:38] [INFO ] Load time of PNML (sax parser for PT used): 123 ms
[2022-06-12 23:31:38] [INFO ] Transformed 78 places.
[2022-06-12 23:31:38] [INFO ] Transformed 968 transitions.
[2022-06-12 23:31:38] [INFO ] Parsed PT model containing 78 places and 968 transitions in 224 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 90 ms.
Working with output stream class java.io.PrintStream
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 57 resets, run finished after 274 ms. (steps per millisecond=36 ) properties (out of 14) seen :3
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-07 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-00 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 18 resets, run finished after 370 ms. (steps per millisecond=27 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 28 resets, run finished after 844 ms. (steps per millisecond=11 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 24 resets, run finished after 787 ms. (steps per millisecond=12 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 21 resets, run finished after 66 ms. (steps per millisecond=151 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 19 resets, run finished after 60 ms. (steps per millisecond=166 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 19 resets, run finished after 58 ms. (steps per millisecond=172 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 21 resets, run finished after 66 ms. (steps per millisecond=151 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 22 resets, run finished after 75 ms. (steps per millisecond=133 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10000 steps, including 20 resets, run finished after 63 ms. (steps per millisecond=158 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 21 resets, run finished after 66 ms. (steps per millisecond=151 ) properties (out of 11) seen :0
Incomplete Best-First random walk after 10001 steps, including 22 resets, run finished after 91 ms. (steps per millisecond=109 ) properties (out of 11) seen :0
Running SMT prover for 11 properties.
[2022-06-12 23:31:41] [INFO ] Flow matrix only has 170 transitions (discarded 798 similar events)
// Phase 1: matrix 170 rows 78 cols
[2022-06-12 23:31:41] [INFO ] Computed 7 place invariants in 11 ms
[2022-06-12 23:31:41] [INFO ] [Real]Absence check using 7 positive place invariants in 10 ms returned sat
[2022-06-12 23:31:41] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:41] [INFO ] [Real]Absence check using state equation in 77 ms returned sat
[2022-06-12 23:31:41] [INFO ] State equation strengthened by 42 read => feed constraints.
[2022-06-12 23:31:41] [INFO ] [Real]Added 42 Read/Feed constraints in 70 ms returned sat
[2022-06-12 23:31:41] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:41] [INFO ] [Nat]Absence check using 7 positive place invariants in 5 ms returned sat
[2022-06-12 23:31:41] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:41] [INFO ] [Nat]Absence check using state equation in 52 ms returned sat
[2022-06-12 23:31:41] [INFO ] [Nat]Added 42 Read/Feed constraints in 17 ms returned sat
[2022-06-12 23:31:42] [INFO ] Deduced a trap composed of 5 places in 128 ms of which 3 ms to minimize.
[2022-06-12 23:31:42] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 173 ms
[2022-06-12 23:31:42] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 69 ms.
[2022-06-12 23:31:42] [INFO ] Added : 57 causal constraints over 13 iterations in 300 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 5 ms.
[2022-06-12 23:31:42] [INFO ] [Real]Absence check using 7 positive place invariants in 11 ms returned unsat
[2022-06-12 23:31:42] [INFO ] [Real]Absence check using 7 positive place invariants in 7 ms returned unsat
[2022-06-12 23:31:42] [INFO ] [Real]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:42] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:42] [INFO ] [Real]Absence check using state equation in 37 ms returned sat
[2022-06-12 23:31:42] [INFO ] [Real]Added 42 Read/Feed constraints in 11 ms returned sat
[2022-06-12 23:31:42] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:42] [INFO ] [Nat]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:42] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:42] [INFO ] [Nat]Absence check using state equation in 34 ms returned sat
[2022-06-12 23:31:42] [INFO ] [Nat]Added 42 Read/Feed constraints in 49 ms returned sat
[2022-06-12 23:31:42] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 47 ms.
[2022-06-12 23:31:42] [INFO ] Added : 54 causal constraints over 12 iterations in 238 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 4 ms.
[2022-06-12 23:31:42] [INFO ] [Real]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:42] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:43] [INFO ] [Real]Absence check using state equation in 41 ms returned sat
[2022-06-12 23:31:43] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:43] [INFO ] [Nat]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:43] [INFO ] [Nat]Absence check using state equation in 45 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Nat]Added 42 Read/Feed constraints in 10 ms returned sat
[2022-06-12 23:31:43] [INFO ] Deduced a trap composed of 5 places in 68 ms of which 2 ms to minimize.
[2022-06-12 23:31:43] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 84 ms
[2022-06-12 23:31:43] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 37 ms.
[2022-06-12 23:31:43] [INFO ] Added : 55 causal constraints over 12 iterations in 200 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 4 ms.
[2022-06-12 23:31:43] [INFO ] [Real]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:43] [INFO ] [Real]Absence check using state equation in 34 ms returned sat
[2022-06-12 23:31:43] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:43] [INFO ] [Nat]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:43] [INFO ] [Nat]Absence check using state equation in 36 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Nat]Added 42 Read/Feed constraints in 11 ms returned sat
[2022-06-12 23:31:43] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 37 ms.
[2022-06-12 23:31:43] [INFO ] Added : 56 causal constraints over 16 iterations in 281 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 5 ms.
[2022-06-12 23:31:43] [INFO ] [Real]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:43] [INFO ] [Real]Absence check using state equation in 31 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Real]Added 42 Read/Feed constraints in 13 ms returned sat
[2022-06-12 23:31:43] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:43] [INFO ] [Nat]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:43] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:44] [INFO ] [Nat]Absence check using state equation in 27 ms returned sat
[2022-06-12 23:31:44] [INFO ] [Nat]Added 42 Read/Feed constraints in 25 ms returned sat
[2022-06-12 23:31:44] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 60 ms.
[2022-06-12 23:31:44] [INFO ] Added : 57 causal constraints over 12 iterations in 260 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 24 ms.
[2022-06-12 23:31:44] [INFO ] [Real]Absence check using 7 positive place invariants in 57 ms returned unsat
[2022-06-12 23:31:44] [INFO ] [Real]Absence check using 7 positive place invariants in 1 ms returned sat
[2022-06-12 23:31:44] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:44] [INFO ] [Real]Absence check using state equation in 95 ms returned sat
[2022-06-12 23:31:44] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:44] [INFO ] [Nat]Absence check using 7 positive place invariants in 52 ms returned sat
[2022-06-12 23:31:44] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:44] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2022-06-12 23:31:44] [INFO ] [Nat]Added 42 Read/Feed constraints in 20 ms returned sat
[2022-06-12 23:31:44] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 57 ms.
[2022-06-12 23:31:45] [INFO ] Added : 51 causal constraints over 13 iterations in 329 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 3 ms.
[2022-06-12 23:31:45] [INFO ] [Real]Absence check using 7 positive place invariants in 2 ms returned sat
[2022-06-12 23:31:45] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:45] [INFO ] [Real]Absence check using state equation in 171 ms returned sat
[2022-06-12 23:31:45] [INFO ] [Real]Added 42 Read/Feed constraints in 9 ms returned sat
[2022-06-12 23:31:45] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:31:45] [INFO ] [Nat]Absence check using 7 positive place invariants in 3 ms returned sat
[2022-06-12 23:31:45] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:31:45] [INFO ] [Nat]Absence check using state equation in 49 ms returned sat
[2022-06-12 23:31:45] [INFO ] [Nat]Added 42 Read/Feed constraints in 23 ms returned sat
[2022-06-12 23:31:45] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 107 transitions) in 25 ms.
[2022-06-12 23:31:45] [INFO ] Added : 57 causal constraints over 12 iterations in 235 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 5 ms.
[2022-06-12 23:31:45] [INFO ] [Real]Absence check using 7 positive place invariants in 2 ms returned unsat
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-15 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-12 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-06 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-05 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 11 Parikh solutions to 7 different solutions.
Incomplete Parikh walk after 132200 steps, including 1469 resets, run finished after 771 ms. (steps per millisecond=171 ) properties (out of 7) seen :1 could not realise parikh vector
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-01 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 185500 steps, including 1678 resets, run finished after 926 ms. (steps per millisecond=200 ) properties (out of 6) seen :0 could not realise parikh vector
Incomplete Parikh walk after 240400 steps, including 2079 resets, run finished after 1272 ms. (steps per millisecond=188 ) properties (out of 6) seen :0 could not realise parikh vector
Incomplete Parikh walk after 241300 steps, including 2166 resets, run finished after 1229 ms. (steps per millisecond=196 ) properties (out of 6) seen :1 could not realise parikh vector
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-10 TRUE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 243300 steps, including 2098 resets, run finished after 1282 ms. (steps per millisecond=189 ) properties (out of 5) seen :0 could not realise parikh vector
Incomplete Parikh walk after 159700 steps, including 1678 resets, run finished after 763 ms. (steps per millisecond=209 ) properties (out of 5) seen :1 could not realise parikh vector
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-13 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 242700 steps, including 2089 resets, run finished after 1162 ms. (steps per millisecond=208 ) properties (out of 4) seen :0 could not realise parikh vector
Support contains 37 out of 78 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 78/78 places, 968/968 transitions.
Graph (complete) has 642 edges and 78 vertex of which 76 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.13 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 75 transition count 967
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 75 transition count 967
Applied a total of 3 rules in 168 ms. Remains 75 /78 variables (removed 3) and now considering 967/968 (removed 1) transitions.
[2022-06-12 23:31:53] [INFO ] Flow matrix only has 169 transitions (discarded 798 similar events)
// Phase 1: matrix 169 rows 75 cols
[2022-06-12 23:31:53] [INFO ] Computed 5 place invariants in 7 ms
[2022-06-12 23:31:53] [INFO ] Dead Transitions using invariants and state equation in 463 ms returned []
Finished structural reductions, in 1 iterations. Remains : 75/78 places, 967/968 transitions.
[2022-06-12 23:31:54] [INFO ] Flatten gal took : 204 ms
[2022-06-12 23:31:54] [INFO ] Flatten gal took : 128 ms
[2022-06-12 23:31:54] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality8038243885177259894.gal : 55 ms
[2022-06-12 23:31:54] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality11722284856834055584.prop : 10 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality8038243885177259894.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality11722284856834055584.prop, --nowitness, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality8038243885177259894.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality11722284856834055584.prop --nowitness --gen-order FOLLOW
Loading property file /tmp/ReachabilityCardinality11722284856834055584.prop.
SDD proceeding with computation,4 properties remain. new max is 4
SDD size :1 after 2
SDD proceeding with computation,4 properties remain. new max is 8
SDD size :2 after 6
SDD proceeding with computation,4 properties remain. new max is 16
SDD size :6 after 32
SDD proceeding with computation,4 properties remain. new max is 32
SDD size :32 after 100
SDD proceeding with computation,4 properties remain. new max is 64
SDD size :100 after 312
SDD proceeding with computation,4 properties remain. new max is 128
SDD size :312 after 900
SDD proceeding with computation,4 properties remain. new max is 256
SDD size :6208 after 6209
SDD proceeding with computation,4 properties remain. new max is 512
SDD size :6209 after 6286
SDD proceeding with computation,4 properties remain. new max is 1024
SDD size :6286 after 6393
SDD proceeding with computation,4 properties remain. new max is 2048
SDD size :6393 after 9166
Detected timeout of ITS tools.
[2022-06-12 23:32:09] [INFO ] Flatten gal took : 86 ms
[2022-06-12 23:32:09] [INFO ] Applying decomposition
[2022-06-12 23:32:09] [INFO ] Flatten gal took : 94 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/convert-linux64, -i, /tmp/graph14657370019058378083.txt, -o, /tmp/graph14657370019058378083.bin, -w, /tmp/graph14657370019058378083.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/louvain-linux64, /tmp/graph14657370019058378083.bin, -l, -1, -v, -w, /tmp/graph14657370019058378083.weights, -q, 0, -e, 0.001], workingDir=null]
[2022-06-12 23:32:10] [INFO ] Decomposing Gal with order
[2022-06-12 23:32:10] [INFO ] Rewriting arrays to variables to allow decomposition.
[2022-06-12 23:32:11] [INFO ] Removed a total of 1871 redundant transitions.
[2022-06-12 23:32:11] [INFO ] Flatten gal took : 720 ms
[2022-06-12 23:32:11] [INFO ] Fuse similar labels procedure discarded/fused a total of 273 labels/synchronizations in 30 ms.
[2022-06-12 23:32:11] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality14501571889875663901.gal : 22 ms
[2022-06-12 23:32:11] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality9564195470263030614.prop : 13 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality14501571889875663901.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality9564195470263030614.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality14501571889875663901.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality9564195470263030614.prop --nowitness
Loading property file /tmp/ReachabilityCardinality9564195470263030614.prop.
SDD proceeding with computation,4 properties remain. new max is 4
SDD size :5078 after 5097
SDD proceeding with computation,4 properties remain. new max is 8
SDD size :10224 after 11920
SDD proceeding with computation,4 properties remain. new max is 16
SDD size :35438 after 35439
SDD proceeding with computation,4 properties remain. new max is 32
SDD size :59791 after 69869
SDD proceeding with computation,4 properties remain. new max is 64
SDD size :150923 after 173781
Detected timeout of ITS tools.
Built C files in :
/tmp/ltsmin18102013004054897870
[2022-06-12 23:32:26] [INFO ] Built C files in 31ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin18102013004054897870
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin18102013004054897870]
WARNING : LTS min runner thread failed on error :java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin18102013004054897870] killed by timeout after 1 SECONDS
java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin18102013004054897870] killed by timeout after 1 SECONDS
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:79)
at java.base/java.lang.Thread.run(Thread.java:834)
Incomplete random walk after 1000000 steps, including 5754 resets, run finished after 4614 ms. (steps per millisecond=216 ) properties (out of 4) seen :0
Incomplete Best-First random walk after 1000000 steps, including 2116 resets, run finished after 1724 ms. (steps per millisecond=580 ) properties (out of 4) seen :0
Incomplete Best-First random walk after 1000001 steps, including 1996 resets, run finished after 2842 ms. (steps per millisecond=351 ) properties (out of 4) seen :0
Incomplete Best-First random walk after 1000001 steps, including 2169 resets, run finished after 1563 ms. (steps per millisecond=639 ) properties (out of 4) seen :0
Incomplete Best-First random walk after 1000000 steps, including 2171 resets, run finished after 1560 ms. (steps per millisecond=641 ) properties (out of 4) seen :0
Interrupted probabilistic random walk after 7084502 steps, run timeout after 30001 ms. (steps per millisecond=236 ) properties seen :{0=1, 1=1}
Probabilistic random walk after 7084502 steps, saw 1630208 distinct states, run finished after 30005 ms. (steps per millisecond=236 ) properties seen :{0=1, 1=1}
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-09 FALSE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-08 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
Running SMT prover for 2 properties.
[2022-06-12 23:33:10] [INFO ] Flow matrix only has 169 transitions (discarded 798 similar events)
// Phase 1: matrix 169 rows 75 cols
[2022-06-12 23:33:10] [INFO ] Computed 5 place invariants in 3 ms
[2022-06-12 23:33:10] [INFO ] [Real]Absence check using 5 positive place invariants in 1 ms returned sat
[2022-06-12 23:33:10] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:33:10] [INFO ] [Real]Absence check using state equation in 79 ms returned sat
[2022-06-12 23:33:10] [INFO ] State equation strengthened by 42 read => feed constraints.
[2022-06-12 23:33:10] [INFO ] [Real]Added 42 Read/Feed constraints in 26 ms returned sat
[2022-06-12 23:33:10] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:33:10] [INFO ] [Nat]Absence check using 5 positive place invariants in 14 ms returned sat
[2022-06-12 23:33:10] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:33:10] [INFO ] [Nat]Absence check using state equation in 74 ms returned sat
[2022-06-12 23:33:10] [INFO ] [Nat]Added 42 Read/Feed constraints in 22 ms returned sat
[2022-06-12 23:33:10] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 106 transitions) in 28 ms.
[2022-06-12 23:33:10] [INFO ] Added : 57 causal constraints over 26 iterations in 488 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 31 ms.
[2022-06-12 23:33:11] [INFO ] [Real]Absence check using 5 positive place invariants in 25 ms returned sat
[2022-06-12 23:33:11] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2022-06-12 23:33:11] [INFO ] [Real]Absence check using state equation in 27 ms returned sat
[2022-06-12 23:33:11] [INFO ] [Real]Added 42 Read/Feed constraints in 14 ms returned sat
[2022-06-12 23:33:11] [INFO ] Solution in real domain found non-integer solution.
[2022-06-12 23:33:11] [INFO ] [Nat]Absence check using 5 positive place invariants in 2 ms returned sat
[2022-06-12 23:33:11] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 23:33:11] [INFO ] [Nat]Absence check using state equation in 59 ms returned sat
[2022-06-12 23:33:11] [INFO ] [Nat]Added 42 Read/Feed constraints in 27 ms returned sat
[2022-06-12 23:33:11] [INFO ] Computed and/alt/rep : 60/118/60 causal constraints (skipped 106 transitions) in 33 ms.
[2022-06-12 23:33:11] [INFO ] Added : 57 causal constraints over 12 iterations in 249 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 6 ms.
Incomplete Parikh walk after 243800 steps, including 2070 resets, run finished after 1192 ms. (steps per millisecond=204 ) properties (out of 2) seen :0 could not realise parikh vector
Incomplete Parikh walk after 134000 steps, including 1390 resets, run finished after 562 ms. (steps per millisecond=238 ) properties (out of 2) seen :0 could not realise parikh vector
Support contains 5 out of 75 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 75/75 places, 967/967 transitions.
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 2 places and 0 transitions.
Iterating global reduction 0 with 3 rules applied. Total rules applied 3 place count 73 transition count 966
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Deduced a syphon composed of 2 places in 1 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 0 with 4 rules applied. Total rules applied 7 place count 71 transition count 964
Applied a total of 7 rules in 173 ms. Remains 71 /75 variables (removed 4) and now considering 964/967 (removed 3) transitions.
Finished structural reductions, in 1 iterations. Remains : 71/75 places, 964/967 transitions.
[2022-06-12 23:33:13] [INFO ] Flatten gal took : 55 ms
[2022-06-12 23:33:13] [INFO ] Flatten gal took : 53 ms
[2022-06-12 23:33:13] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality7441819445134069587.gal : 17 ms
[2022-06-12 23:33:13] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality16227445903931957983.prop : 1 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality7441819445134069587.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality16227445903931957983.prop, --nowitness, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality7441819445134069587.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality16227445903931957983.prop --nowitness --gen-order FOLLOW
Loading property file /tmp/ReachabilityCardinality16227445903931957983.prop.
SDD proceeding with computation,2 properties remain. new max is 4
SDD size :1 after 2
SDD proceeding with computation,2 properties remain. new max is 8
SDD size :2 after 6
SDD proceeding with computation,2 properties remain. new max is 16
SDD size :6 after 12
SDD proceeding with computation,2 properties remain. new max is 32
SDD size :12 after 20
SDD proceeding with computation,2 properties remain. new max is 64
SDD size :20 after 30
SDD proceeding with computation,2 properties remain. new max is 128
SDD size :30 after 56
SDD proceeding with computation,2 properties remain. new max is 256
SDD size :56 after 110
SDD proceeding with computation,2 properties remain. new max is 512
SDD size :110 after 340
SDD proceeding with computation,2 properties remain. new max is 1024
SDD size :926 after 966
SDD proceeding with computation,2 properties remain. new max is 2048
SDD size :966 after 3458
SDD proceeding with computation,2 properties remain. new max is 4096
SDD size :10235 after 10397
SDD proceeding with computation,2 properties remain. new max is 8192
SDD size :10397 after 10643
SDD proceeding with computation,2 properties remain. new max is 16384
SDD size :24723 after 25150
Detected timeout of ITS tools.
[2022-06-12 23:33:28] [INFO ] Flatten gal took : 37 ms
[2022-06-12 23:33:28] [INFO ] Applying decomposition
[2022-06-12 23:33:28] [INFO ] Flatten gal took : 34 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/convert-linux64, -i, /tmp/graph16100447526257122554.txt, -o, /tmp/graph16100447526257122554.bin, -w, /tmp/graph16100447526257122554.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/louvain-linux64, /tmp/graph16100447526257122554.bin, -l, -1, -v, -w, /tmp/graph16100447526257122554.weights, -q, 0, -e, 0.001], workingDir=null]
[2022-06-12 23:33:28] [INFO ] Decomposing Gal with order
[2022-06-12 23:33:28] [INFO ] Rewriting arrays to variables to allow decomposition.
[2022-06-12 23:33:29] [INFO ] Removed a total of 1755 redundant transitions.
[2022-06-12 23:33:29] [INFO ] Flatten gal took : 185 ms
[2022-06-12 23:33:29] [INFO ] Fuse similar labels procedure discarded/fused a total of 118 labels/synchronizations in 9 ms.
[2022-06-12 23:33:29] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality15874870440369513913.gal : 1 ms
[2022-06-12 23:33:29] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality8041738000162932317.prop : 0 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality15874870440369513913.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality8041738000162932317.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality15874870440369513913.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality8041738000162932317.prop --nowitness
Loading property file /tmp/ReachabilityCardinality8041738000162932317.prop.
SDD proceeding with computation,2 properties remain. new max is 4
SDD size :1 after 12
SDD proceeding with computation,2 properties remain. new max is 8
SDD size :12 after 17
SDD proceeding with computation,2 properties remain. new max is 16
SDD size :17 after 26
SDD proceeding with computation,2 properties remain. new max is 32
SDD size :26 after 91
SDD proceeding with computation,2 properties remain. new max is 64
SDD size :91 after 361
SDD proceeding with computation,2 properties remain. new max is 128
SDD size :902 after 1022
SDD proceeding with computation,2 properties remain. new max is 256
SDD size :2582 after 2742
SDD proceeding with computation,2 properties remain. new max is 512
SDD size :5040 after 6558
SDD proceeding with computation,2 properties remain. new max is 1024
SDD size :15040 after 17865
SDD proceeding with computation,2 properties remain. new max is 2048
SDD size :38462 after 47942
SDD proceeding with computation,2 properties remain. new max is 4096
SDD size :198685 after 210581
Detected timeout of ITS tools.
Built C files in :
/tmp/ltsmin5132224120245032419
[2022-06-12 23:33:44] [INFO ] Built C files in 30ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin5132224120245032419
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin5132224120245032419]
WARNING : LTS min runner thread failed on error :java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin5132224120245032419] killed by timeout after 1 SECONDS
java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin5132224120245032419] killed by timeout after 1 SECONDS
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:79)
at java.base/java.lang.Thread.run(Thread.java:834)
Finished random walk after 247547 steps, including 1988 resets, run visited all 2 properties in 1059 ms. (steps per millisecond=233 )
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-PT-V20P10N20-ReachabilityFireability-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
All properties solved without resorting to model-checking.

BK_STOP 1655076827308

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination ReachabilityFireability -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="BridgeAndVehicles-PT-V20P10N20"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="gold2021"
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 2-4028"
echo " Executing tool gold2021"
echo " Input is BridgeAndVehicles-PT-V20P10N20, 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 r028-tall-165251936000072"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-PT-V20P10N20.tgz
mv BridgeAndVehicles-PT-V20P10N20 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.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -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 ;