Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2026-input.r114-smll-177955740700566.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2026-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 2-5973
Executing tool itstools
Input is ErlangenMainframeV0-PT-1400, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r114-smll-177955740700566
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 77M
-rw-r--r-- 1 mcc users 6.1K Mar 7 05:06 CTLCardinality.txt
-rw-r--r-- 1 mcc users 59K Mar 7 05:06 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.7K Mar 7 05:06 CTLFireability.txt
-rw-r--r-- 1 mcc users 49K Mar 7 05:06 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.9K Mar 15 09:59 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Mar 15 09:59 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Mar 15 09:59 LTLFireability.txt
-rw-r--r-- 1 mcc users 21K Mar 15 09:59 LTLFireability.xml
-rw-r--r-- 1 mcc users 17K Mar 7 05:07 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 189K Mar 7 05:07 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.6K Mar 7 05:06 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 48K Mar 7 05:06 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Mar 15 09:59 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Mar 15 09:59 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 77M Mar 3 18:30 model.pnml

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

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

The expected result is a vector of booleans
BOOL_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-00
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-01
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-02
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-03
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-04
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-05
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-06
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-07
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-08
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-09
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-10
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-11
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-12
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-13
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-14
FORMULA_NAME ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-15

=== Now, execution of the tool begins

BK_START 1779972440784

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=ErlangenMainframeV0-PT-1400
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
ReachabilityCardinality PT
Running Version 202604301425
[2026-05-28 12:47:22] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2026-05-28 12:47:22] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-28 12:47:27] [INFO ] Load time of PNML (sax parser for PT used): 4123 ms
[2026-05-28 12:47:27] [INFO ] Transformed 299 places.
[2026-05-28 12:47:27] [INFO ] Transformed 49450 transitions.
[2026-05-28 12:47:27] [INFO ] Found NUPN structural information;
[2026-05-28 12:47:27] [INFO ] Parsed PT model containing 299 places and 49450 transitions and 1540891 arcs in 4869 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 53 ms.
Working with output stream class java.io.PrintStream
Deduced a syphon composed of 4 places in 265 ms
Reduce places removed 4 places and 4 transitions.
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 40000 steps (8 resets) in 44740 ms. (0 steps per ms) remains 6/12 properties
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-09 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-07 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-03 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (8 resets) in 11384 ms. (3 steps per ms) remains 5/6 properties
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-00 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
[2026-05-28 12:47:46] [INFO ] Flatten gal took : 14897 ms
BEST_FIRST walk for 34418 steps (8 resets) in 20020 ms. (1 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 12357 ms. (3 steps per ms) remains 4/5 properties
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-06 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40003 steps (8 resets) in 14222 ms. (2 steps per ms) remains 4/4 properties
[2026-05-28 12:47:58] [INFO ] Flatten gal took : 11903 ms
BEST_FIRST walk for 40004 steps (8 resets) in 3569 ms. (11 steps per ms) remains 2/4 properties
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-14 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-10 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-17345886812346035540.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-2453158376336287742.kers'
[2026-05-28 12:47:58] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-17345886812346035540.kers, --Pflows, --basisKERS=/tmp/petrispot-output-2453158376336287742.kers]
Culled 0 columns in 288 ms.
// Phase 1: matrix 49446 rows 295 cols 1540883 entries
[2026-05-28 12:47:59] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality9900869113184888686.gal : 1604 ms
[2026-05-28 12:47:59] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality15776998490929971391.prop : 2 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality9900869113184888686.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality15776998490929971391.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Finished phase 1 with 259 SingleSign rule and 2 generalized
[2026-05-28 12:48:00] [INFO ] Computed 34 invariants in 1372 ms
Computed 34 P flows in 1374 ms.
Exported basis to /tmp/petrispot-output-2453158376336287742.kers
Total runtime 1555 ms.
Excessive predecessor constraint size, skipping predecessor.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/10 variables, 10/10 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/10 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 2 (OVERLAPS) 135/145 variables, 9/19 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/145 variables, 135/154 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/145 variables, 0/154 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 5 (OVERLAPS) 123/268 variables, 11/165 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/268 variables, 123/288 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/268 variables, 0/288 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 8 (OVERLAPS) 27/295 variables, 14/302 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/295 variables, 27/329 constraints. Problems are: Problem set: 0 solved, 2 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/295 variables, 0/329 constraints. Problems are: Problem set: 0 solved, 2 unsolved
SMT process timed out in 7843ms, After SMT, problems are : Problem set: 0 solved, 2 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 10 out of 295 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 295/295 places, 49446/49446 transitions.
Graph (trivial) has 211 edges and 295 vertex of which 4 / 295 are part of one of the 2 SCC in 27 ms
Free SCC test removed 2 places
Drop transitions (Empty/Sink Transition effects.) removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Graph (complete) has 2173 edges and 293 vertex of which 291 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.534 ms
Discarding 2 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 84 transitions
Trivial Post-agglo rules discarded 84 transitions
Performed 84 trivial Post agglomeration. Transition count delta: 84
Iterating post reduction 0 with 86 rules applied. Total rules applied 88 place count 291 transition count 49356
Reduce places removed 84 places and 0 transitions.
Performed 4 Post agglomeration using F-continuation condition.Transition count delta: 4
Iterating post reduction 1 with 88 rules applied. Total rules applied 176 place count 207 transition count 49352
Reduce places removed 4 places and 0 transitions.
Iterating post reduction 2 with 4 rules applied. Total rules applied 180 place count 203 transition count 49352
Performed 7 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 7 Pre rules applied. Total rules applied 180 place count 203 transition count 49345
Deduced a syphon composed of 7 places in 122 ms
Reduce places removed 7 places and 0 transitions.
Iterating global reduction 3 with 14 rules applied. Total rules applied 194 place count 196 transition count 49345
Discarding 40 places :
Symmetric choice reduction at 3 with 40 rule applications. Total rules 234 place count 156 transition count 49305
Iterating global reduction 3 with 40 rules applied. Total rules applied 274 place count 156 transition count 49305
Performed 4 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 4 Pre rules applied. Total rules applied 274 place count 156 transition count 49301
Deduced a syphon composed of 4 places in 122 ms
Reduce places removed 4 places and 0 transitions.
Iterating global reduction 3 with 8 rules applied. Total rules applied 282 place count 152 transition count 49301
Discarding 11 places :
Symmetric choice reduction at 3 with 11 rule applications. Total rules 293 place count 141 transition count 32925
Ensure Unique test removed 11 places
Iterating global reduction 3 with 22 rules applied. Total rules applied 315 place count 130 transition count 32925
Discarding 11 places :
Symmetric choice reduction at 3 with 11 rule applications. Total rules 326 place count 119 transition count 173
Iterating global reduction 3 with 11 rules applied. Total rules applied 337 place count 119 transition count 173
Performed 52 Post agglomeration using F-continuation condition.Transition count delta: 52
Deduced a syphon composed of 52 places in 0 ms
Reduce places removed 52 places and 0 transitions.
Iterating global reduction 3 with 104 rules applied. Total rules applied 441 place count 67 transition count 121
Drop transitions (Empty/Sink Transition effects.) removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Graph (complete) has 398 edges and 67 vertex of which 66 are kept as prefixes of interest. Removing 1 places using SCC suffix rule.0 ms
Discarding 1 places :
Also discarding 0 output transitions
Iterating post reduction 3 with 3 rules applied. Total rules applied 444 place count 66 transition count 119
Discarding 3 places :
Symmetric choice reduction at 4 with 3 rule applications. Total rules 447 place count 63 transition count 91
Iterating global reduction 4 with 3 rules applied. Total rules applied 450 place count 63 transition count 91
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 4 with 2 rules applied. Total rules applied 452 place count 63 transition count 89
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: -4
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 5 with 2 rules applied. Total rules applied 454 place count 62 transition count 93
Drop transitions (Redundant composition of simpler transitions.) removed 11 transitions
Redundant transition composition rules discarded 11 transitions
Iterating global reduction 5 with 11 rules applied. Total rules applied 465 place count 62 transition count 82
Free-agglomeration rule applied 16 times.
Iterating global reduction 5 with 16 rules applied. Total rules applied 481 place count 62 transition count 66
Reduce places removed 16 places and 0 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 13 transitions
Reduce isomorphic transitions removed 13 transitions.
Iterating post reduction 5 with 29 rules applied. Total rules applied 510 place count 46 transition count 53
Ensure Unique test removed 8 places
Iterating post reduction 6 with 8 rules applied. Total rules applied 518 place count 38 transition count 53
Drop transitions (Redundant composition of simpler transitions.) removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 7 with 1 rules applied. Total rules applied 519 place count 38 transition count 52
Applied a total of 519 rules in 24175 ms. Remains 38 /295 variables (removed 257) and now considering 52/49446 (removed 49394) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 24192 ms. Remains : 38/295 places, 52/49446 transitions.
RANDOM walk for 782 steps (0 resets) in 13 ms. (55 steps per ms) remains 0/2 properties
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-05 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ErlangenMainframeV0-PT-1400-ReachabilityCardinality-2024-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
All properties solved without resorting to model-checking.
Total runtime 68197 ms.

BK_STOP 1779972511200

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202604301425.jar
+ VERSION=202604301425
+ echo 'Running Version 202604301425'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600

Sequence of Actions to be Executed by the VM

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

set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="ErlangenMainframeV0-PT-1400"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# this is specific to your benchmark or test

export BIN_DIR="$HOME/BenchKit/bin"

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

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5973"
echo " Executing tool itstools"
echo " Input is ErlangenMainframeV0-PT-1400, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r114-smll-177955740700566"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ErlangenMainframeV0-PT-1400.tgz
mv ErlangenMainframeV0-PT-1400 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh

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