Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2023-input.r531-tall-167987252400241.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
............................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5348
Executing tool itstools
Input is PGCD-COL-D02N006, examination is ReachabilityDeadlock
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r531-tall-167987252400241
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 508K
-rw-r--r-- 1 mcc users 6.9K Mar 23 15:24 CTLCardinality.txt
-rw-r--r-- 1 mcc users 78K Mar 23 15:24 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.1K Mar 23 15:21 CTLFireability.txt
-rw-r--r-- 1 mcc users 48K Mar 23 15:21 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.6K Mar 23 07:07 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Mar 23 07:07 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K Mar 23 07:07 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K Mar 23 07:07 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 Mar 26 22:42 NewModel
-rw-r--r-- 1 mcc users 14K Mar 23 15:27 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 164K Mar 23 15:27 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.5K Mar 23 15:27 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 82K Mar 23 15:27 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 23 07:07 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Mar 23 07:07 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 26 22:42 equiv_pt
-rw-r--r-- 1 mcc users 8 Mar 26 22:42 instance
-rw-r--r-- 1 mcc users 5 Mar 26 22:42 iscolored
-rw-r--r-- 1 mcc users 11K Mar 31 16:48 model.pnml

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

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

The expected result is a vector of booleans
BOOL_VECTOR

FORMULA_NAME ReachabilityDeadlock

=== Now, execution of the tool begins

BK_START 1680810921472

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=itstools
BK_EXAMINATION=ReachabilityDeadlock
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=PGCD-COL-D02N006
Not applying reductions.
Model is COL
ReachabilityDeadlock COL
Running Version 202304061127
[2023-04-06 19:55:23] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityDeadlock, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2023-04-06 19:55:23] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-04-06 19:55:23] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
log4j:WARN No appenders could be found for logger (org.apache.axiom.locator.DefaultOMMetaFactoryLocator).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[2023-04-06 19:55:23] [WARNING] Using fallBack plugin, rng conformance not checked
[2023-04-06 19:55:23] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 383 ms
[2023-04-06 19:55:23] [INFO ] Imported 3 HL places and 3 HL transitions for a total of 9 PT places and 9.0 transition bindings in 16 ms.
Parsed 1 properties from file /home/mcc/execution/ReachabilityDeadlock.xml in 1 ms.
Working with output stream class java.io.PrintStream
[2023-04-06 19:55:23] [INFO ] Built PT skeleton of HLPN with 3 places and 3 transitions 14 arcs in 4 ms.
[2023-04-06 19:55:23] [INFO ] Skeletonized 1 HLPN properties in 0 ms.
Computed a total of 0 stabilizing places and 0 stable transitions
Prefix of Interest using HLPN skeleton for deadlock discarded 0 places and 0 transitions.
Arc [2:1*[(MOD (ADD $x 1) 3)]] contains successor/predecessor on variables of sort CD
[2023-04-06 19:55:23] [INFO ] Unfolded HLPN to a Petri net with 9 places and 9 transitions 42 arcs in 5 ms.
[2023-04-06 19:55:23] [INFO ] Unfolded 1 HLPN properties in 0 ms.
Built sparse matrix representations for Structural reductions in 0 ms.24029KB memory used
Starting structural reductions in DEADLOCK mode, iteration 0 : 9/9 places, 9/9 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Applied a total of 0 rules in 8 ms. Remains 9 /9 variables (removed 0) and now considering 9/9 (removed 0) transitions.
// Phase 1: matrix 9 rows 9 cols
[2023-04-06 19:55:23] [INFO ] Computed 4 invariants in 6 ms
[2023-04-06 19:55:23] [INFO ] Dead Transitions using invariants and state equation in 140 ms found 0 transitions.
Finished structural reductions in DEADLOCK mode , in 1 iterations and 172 ms. Remains : 9/9 places, 9/9 transitions.
Starting structural reductions in DEADLOCK mode, iteration 0 : 9/9 places, 9/9 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Applied a total of 0 rules in 2 ms. Remains 9 /9 variables (removed 0) and now considering 9/9 (removed 0) transitions.
[2023-04-06 19:55:23] [INFO ] Invariant cache hit.
[2023-04-06 19:55:23] [INFO ] Implicit Places using invariants in 44 ms returned [6, 7, 8]
Discarding 3 places :
Implicit Place search using SMT only with invariants took 46 ms to find 3 implicit places.
Starting structural reductions in DEADLOCK mode, iteration 1 : 6/9 places, 9/9 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Applied a total of 0 rules in 3 ms. Remains 6 /6 variables (removed 0) and now considering 9/9 (removed 0) transitions.
Finished structural reductions in DEADLOCK mode , in 2 iterations and 51 ms. Remains : 6/9 places, 9/9 transitions.
Random walk for 1250000 steps, including 0 resets, run took 292 ms (no deadlock found). (steps per millisecond=4280 )
Random directed walk for 1250000 steps, including 0 resets, run took 210 ms (no deadlock found). (steps per millisecond=5952 )
// Phase 1: matrix 9 rows 6 cols
[2023-04-06 19:55:24] [INFO ] Computed 1 invariants in 8 ms
[2023-04-06 19:55:24] [INFO ] [Real]Absence check using 1 positive place invariants in 1 ms returned sat
[2023-04-06 19:55:24] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-04-06 19:55:24] [INFO ] [Real]Absence check using state equation in 11 ms returned sat
[2023-04-06 19:55:24] [INFO ] State equation strengthened by 3 read => feed constraints.
[2023-04-06 19:55:24] [INFO ] [Real]Added 3 Read/Feed constraints in 2 ms returned sat
[2023-04-06 19:55:24] [INFO ] Solution in real domain found non-integer solution.
[2023-04-06 19:55:24] [INFO ] [Nat]Absence check using 1 positive place invariants in 1 ms returned sat
[2023-04-06 19:55:24] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-04-06 19:55:24] [INFO ] [Nat]Absence check using state equation in 15 ms returned sat
[2023-04-06 19:55:24] [INFO ] State equation strengthened by 3 read => feed constraints.
[2023-04-06 19:55:24] [INFO ] [Nat]Added 3 Read/Feed constraints in 2 ms returned sat
[2023-04-06 19:55:24] [INFO ] Deduced a trap composed of 3 places in 25 ms of which 3 ms to minimize.
[2023-04-06 19:55:24] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 30 ms
[2023-04-06 19:55:24] [INFO ] Computed and/alt/rep : 3/6/3 causal constraints (skipped 0 transitions) in 1 ms.
[2023-04-06 19:55:24] [INFO ] Added : 1 causal constraints over 1 iterations in 5 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 1 ms.
Parikh directed walk for 1500 steps, including 126 resets, run took 4 ms. (steps per millisecond=375 )
Random directed walk for 500003 steps, including 0 resets, run took 86 ms (no deadlock found). (steps per millisecond=5813 )
Random walk for 500005 steps, including 0 resets, run took 88 ms (no deadlock found). (steps per millisecond=5681 )
Random directed walk for 500000 steps, including 0 resets, run took 70 ms (no deadlock found). (steps per millisecond=7142 )
Random walk for 500000 steps, including 0 resets, run took 85 ms (no deadlock found). (steps per millisecond=5882 )
Starting structural reductions in DEADLOCK mode, iteration 0 : 6/6 places, 9/9 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Applied a total of 0 rules in 1 ms. Remains 6 /6 variables (removed 0) and now considering 9/9 (removed 0) transitions.
[2023-04-06 19:55:24] [INFO ] Invariant cache hit.
[2023-04-06 19:55:24] [INFO ] Implicit Places using invariants in 31 ms returned []
[2023-04-06 19:55:24] [INFO ] Invariant cache hit.
[2023-04-06 19:55:24] [INFO ] State equation strengthened by 3 read => feed constraints.
[2023-04-06 19:55:24] [INFO ] Implicit Places using invariants and state equation in 29 ms returned []
Implicit Place search using SMT with State Equation took 62 ms to find 0 implicit places.
[2023-04-06 19:55:24] [INFO ] Redundant transitions in 0 ms returned []
[2023-04-06 19:55:24] [INFO ] Invariant cache hit.
[2023-04-06 19:55:24] [INFO ] Dead Transitions using invariants and state equation in 22 ms found 0 transitions.
Finished structural reductions in DEADLOCK mode , in 1 iterations and 96 ms. Remains : 6/6 places, 9/9 transitions.
Random walk for 1250000 steps, including 0 resets, run took 197 ms (no deadlock found). (steps per millisecond=6345 )
Random directed walk for 1250000 steps, including 0 resets, run took 198 ms (no deadlock found). (steps per millisecond=6313 )
[2023-04-06 19:55:25] [INFO ] Invariant cache hit.
[2023-04-06 19:55:25] [INFO ] [Real]Absence check using 1 positive place invariants in 0 ms returned sat
[2023-04-06 19:55:25] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-04-06 19:55:25] [INFO ] [Real]Absence check using state equation in 6 ms returned sat
[2023-04-06 19:55:25] [INFO ] State equation strengthened by 3 read => feed constraints.
[2023-04-06 19:55:25] [INFO ] [Real]Added 3 Read/Feed constraints in 1 ms returned sat
[2023-04-06 19:55:25] [INFO ] Solution in real domain found non-integer solution.
[2023-04-06 19:55:25] [INFO ] [Nat]Absence check using 1 positive place invariants in 0 ms returned sat
[2023-04-06 19:55:25] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-04-06 19:55:25] [INFO ] [Nat]Absence check using state equation in 5 ms returned sat
[2023-04-06 19:55:25] [INFO ] State equation strengthened by 3 read => feed constraints.
[2023-04-06 19:55:25] [INFO ] [Nat]Added 3 Read/Feed constraints in 1 ms returned sat
[2023-04-06 19:55:25] [INFO ] Deduced a trap composed of 3 places in 20 ms of which 2 ms to minimize.
[2023-04-06 19:55:25] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 24 ms
[2023-04-06 19:55:25] [INFO ] Computed and/alt/rep : 3/6/3 causal constraints (skipped 0 transitions) in 1 ms.
[2023-04-06 19:55:25] [INFO ] Added : 1 causal constraints over 1 iterations in 9 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 1 ms.
Parikh directed walk for 1500 steps, including 124 resets, run took 3 ms. (steps per millisecond=500 )
Random directed walk for 500007 steps, including 0 resets, run took 72 ms (no deadlock found). (steps per millisecond=6944 )
Random walk for 500001 steps, including 0 resets, run took 83 ms (no deadlock found). (steps per millisecond=6024 )
Random directed walk for 500011 steps, including 0 resets, run took 71 ms (no deadlock found). (steps per millisecond=7042 )
Random walk for 500000 steps, including 0 resets, run took 85 ms (no deadlock found). (steps per millisecond=5882 )
[2023-04-06 19:55:25] [INFO ] Flatten gal took : 14 ms
Using solver Z3 to compute partial order matrices.
Built C files in :
/tmp/ltsmin14397126290197128059
[2023-04-06 19:55:25] [INFO ] Applying decomposition
[2023-04-06 19:55:25] [INFO ] Flatten gal took : 2 ms
[2023-04-06 19:55:25] [INFO ] Computing symmetric may disable matrix : 9 transitions.
[2023-04-06 19:55:25] [INFO ] Computation of Complete disable matrix. took 1 ms. Total solver calls (SAT/UNSAT): 0(0/0)
[2023-04-06 19:55:25] [INFO ] Computing symmetric may enable matrix : 9 transitions.
[2023-04-06 19:55:25] [INFO ] Computation of Complete enable matrix. took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
[2023-04-06 19:55:25] [INFO ] Computing Do-Not-Accords matrix : 9 transitions.
[2023-04-06 19:55:25] [INFO ] Computation of Completed DNA matrix. took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
[2023-04-06 19:55:25] [INFO ] Built C files in 10ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin14397126290197128059
Running compilation step : cd /tmp/ltsmin14397126290197128059;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202304061127/bin/limit_time.pl' '360' 'gcc' '-c' '-I/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202304061127/bin/include/' '-I.' '-std=c99' '-fPIC' '-O0' 'model.c'
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202304061127/bin/convert-linux64' '-i' '/tmp/graph10956767828891211349.txt' '-o' '/tmp/graph10956767828891211349.bin' '-w' '/tmp/graph10956767828891211349.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202304061127/bin/louvain-linux64' '/tmp/graph10956767828891211349.bin' '-l' '-1' '-v' '-w' '/tmp/graph10956767828891211349.weights' '-q' '0' '-e' '0.001'
[2023-04-06 19:55:25] [INFO ] Decomposing Gal with order
[2023-04-06 19:55:25] [INFO ] Rewriting arrays to variables to allow decomposition.
[2023-04-06 19:55:25] [INFO ] Flatten gal took : 14 ms
[2023-04-06 19:55:25] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 1 ms.
[2023-04-06 19:55:25] [INFO ] Time to serialize gal into /tmp/ReachabilityDeadlock12459380934590331753.gal : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202304061127/bin/its-ctl-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityDeadlock12459380934590331753.gal' '-t' 'CGAL' '-ctl' 'DEADLOCK'

its-ctl command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202304061127/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -...235
No direction supplied, using forward translation only.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
reachable,15670,0.033026,4212,88,166,1141,1185,25,1986,22,2745,0


Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
dead,0,0.044641,4464,1,0,1141,1723,49,2332,136,5832,447

System contains 0 deadlocks (shown below if less than --print-limit option) !
FORMULA ReachabilityDeadlock FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
[ 0 ]
WARNING : LTS min runner thread was asked to interrupt. Dying gracefully.
Total runtime 2877 ms.

BK_STOP 1680810926950

--------------------
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
+ [[ ReachabilityDeadlock = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityDeadlock -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ 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//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202304061127.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202304061127
+ echo 'Running Version 202304061127'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityDeadlock -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800

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="PGCD-COL-D02N006"
export BK_EXAMINATION="ReachabilityDeadlock"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# this is specific to your benchmark or test

export BIN_DIR="$HOME/BenchKit/bin"

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

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5348"
echo " Executing tool itstools"
echo " Input is PGCD-COL-D02N006, examination is ReachabilityDeadlock"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r531-tall-167987252400241"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PGCD-COL-D02N006.tgz
mv PGCD-COL-D02N006 execution
cd execution
if [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "UpperBounds" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] || [ "ReachabilityDeadlock" = "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 [ "ReachabilityDeadlock" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityDeadlock" != "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 "ReachabilityDeadlock.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityDeadlock.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityDeadlock.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 '' ReachabilityDeadlock.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityDeadlock"
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 ;