Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2022-input.r006-tajo-165245689000251.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2022-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.......................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is AirplaneLD-PT-0020, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r006-tajo-165245689000251
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 508K
-rw-r--r-- 1 mcc users 22K Apr 29 20:49 CTLCardinality.txt
-rw-r--r-- 1 mcc users 116K Apr 29 20:49 CTLCardinality.xml
-rw-r--r-- 1 mcc users 17K Apr 29 20:48 CTLFireability.txt
-rw-r--r-- 1 mcc users 127K Apr 29 20:48 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K May 10 09:33 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 9.9K May 9 07:01 LTLCardinality.txt
-rw-r--r-- 1 mcc users 37K May 9 07:01 LTLCardinality.xml
-rw-r--r-- 1 mcc users 4.9K May 9 07:01 LTLFireability.txt
-rw-r--r-- 1 mcc users 27K May 9 07:01 LTLFireability.xml
-rw-r--r-- 1 mcc users 2.9K May 9 07:01 UpperBounds.txt
-rw-r--r-- 1 mcc users 6.1K May 9 07:01 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 10 09:33 equiv_col
-rw-r--r-- 1 mcc users 5 May 10 09:33 instance
-rw-r--r-- 1 mcc users 6 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 91K 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 AirplaneLD-PT-0020-LTLCardinality-00
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-01
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-02
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-03
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-04
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-05
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-06
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-07
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-08
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-09
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-10
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-11
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-12
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-13
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-14
FORMULA_NAME AirplaneLD-PT-0020-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1652658477528

Running Version 202205111006
[2022-05-15 23:47:59] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -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]
[2022-05-15 23:47:59] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-05-15 23:47:59] [INFO ] Load time of PNML (sax parser for PT used): 129 ms
[2022-05-15 23:47:59] [INFO ] Transformed 159 places.
[2022-05-15 23:47:59] [INFO ] Transformed 168 transitions.
[2022-05-15 23:47:59] [INFO ] Parsed PT model containing 159 places and 168 transitions in 249 ms.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 28 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 3 formulas.
Reduce places removed 62 places and 0 transitions.
FORMULA AirplaneLD-PT-0020-LTLCardinality-00 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-08 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 74 out of 97 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 97/97 places, 168/168 transitions.
Discarding 18 places :
Symmetric choice reduction at 0 with 18 rule applications. Total rules 18 place count 79 transition count 150
Iterating global reduction 0 with 18 rules applied. Total rules applied 36 place count 79 transition count 150
Ensure Unique test removed 18 transitions
Reduce isomorphic transitions removed 18 transitions.
Iterating post reduction 0 with 18 rules applied. Total rules applied 54 place count 79 transition count 132
Applied a total of 54 rules in 31 ms. Remains 79 /97 variables (removed 18) and now considering 132/168 (removed 36) transitions.
// Phase 1: matrix 132 rows 79 cols
[2022-05-15 23:48:00] [INFO ] Computed 3 place invariants in 16 ms
[2022-05-15 23:48:00] [INFO ] Implicit Places using invariants in 209 ms returned []
// Phase 1: matrix 132 rows 79 cols
[2022-05-15 23:48:00] [INFO ] Computed 3 place invariants in 4 ms
[2022-05-15 23:48:00] [INFO ] Implicit Places using invariants and state equation in 194 ms returned []
Implicit Place search using SMT with State Equation took 478 ms to find 0 implicit places.
// Phase 1: matrix 132 rows 79 cols
[2022-05-15 23:48:00] [INFO ] Computed 3 place invariants in 2 ms
[2022-05-15 23:48:00] [INFO ] Dead Transitions using invariants and state equation in 176 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 79/97 places, 132/168 transitions.
Finished structural reductions, in 1 iterations. Remains : 79/97 places, 132/168 transitions.
Support contains 74 out of 79 places after structural reductions.
[2022-05-15 23:48:00] [INFO ] Flatten gal took : 58 ms
[2022-05-15 23:48:00] [INFO ] Flatten gal took : 27 ms
[2022-05-15 23:48:01] [INFO ] Input system was already deterministic with 132 transitions.
Incomplete random walk after 10000 steps, including 1261 resets, run finished after 535 ms. (steps per millisecond=18 ) properties (out of 20) seen :8
Incomplete Best-First random walk after 10001 steps, including 71 resets, run finished after 45 ms. (steps per millisecond=222 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 74 resets, run finished after 29 ms. (steps per millisecond=344 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 74 resets, run finished after 33 ms. (steps per millisecond=303 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 54 resets, run finished after 24 ms. (steps per millisecond=416 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 76 resets, run finished after 46 ms. (steps per millisecond=217 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 79 resets, run finished after 60 ms. (steps per millisecond=166 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 80 resets, run finished after 66 ms. (steps per millisecond=151 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 73 resets, run finished after 60 ms. (steps per millisecond=166 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10000 steps, including 75 resets, run finished after 52 ms. (steps per millisecond=192 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 55 resets, run finished after 14 ms. (steps per millisecond=714 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 80 resets, run finished after 38 ms. (steps per millisecond=263 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 80 resets, run finished after 43 ms. (steps per millisecond=232 ) properties (out of 12) seen :0
Running SMT prover for 12 properties.
// Phase 1: matrix 132 rows 79 cols
[2022-05-15 23:48:02] [INFO ] Computed 3 place invariants in 7 ms
[2022-05-15 23:48:02] [INFO ] [Real]Absence check using 2 positive place invariants in 0 ms returned sat
[2022-05-15 23:48:02] [INFO ] [Real]Absence check using 2 positive and 1 generalized place invariants in 0 ms returned sat
[2022-05-15 23:48:02] [INFO ] After 159ms SMT Verify possible using all constraints in real domain returned unsat :2 sat :0 real:10
[2022-05-15 23:48:02] [INFO ] [Nat]Absence check using 2 positive place invariants in 1 ms returned sat
[2022-05-15 23:48:02] [INFO ] [Nat]Absence check using 2 positive and 1 generalized place invariants in 1 ms returned sat
[2022-05-15 23:48:02] [INFO ] After 109ms SMT Verify possible using all constraints in natural domain returned unsat :12 sat :0
Fused 12 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
Successfully simplified 12 atomic propositions for a total of 11 simplifications.
FORMULA AirplaneLD-PT-0020-LTLCardinality-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA AirplaneLD-PT-0020-LTLCardinality-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Computed a total of 79 stabilizing places and 132 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 79 transition count 132
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Running Spot : cd /home/mcc/execution;'/home/mcc/BenchKit/bin//..//ltl2tgba' '--check=stutter' '--hoaf=tv' '-f' '!(F((G(F(G(p0)))&&F(p1))))'
Support contains 42 out of 79 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 79/79 places, 132/132 transitions.
Graph (complete) has 179 edges and 79 vertex of which 51 are kept as prefixes of interest. Removing 28 places using SCC suffix rule.16 ms
Discarding 28 places :
Also discarding 24 output transitions
Drop transitions removed 24 transitions
Ensure Unique test removed 19 transitions
Reduce isomorphic transitions removed 19 transitions.
Iterating post reduction 0 with 19 rules applied. Total rules applied 20 place count 51 transition count 89
Applied a total of 20 rules in 21 ms. Remains 51 /79 variables (removed 28) and now considering 89/132 (removed 43) transitions.
// Phase 1: matrix 89 rows 51 cols
[2022-05-15 23:48:02] [INFO ] Computed 1 place invariants in 0 ms
[2022-05-15 23:48:02] [INFO ] Implicit Places using invariants in 23 ms returned []
// Phase 1: matrix 89 rows 51 cols
[2022-05-15 23:48:02] [INFO ] Computed 1 place invariants in 2 ms
[2022-05-15 23:48:02] [INFO ] Implicit Places using invariants and state equation in 56 ms returned []
Implicit Place search using SMT with State Equation took 81 ms to find 0 implicit places.
[2022-05-15 23:48:02] [INFO ] Redundant transitions in 2 ms returned []
// Phase 1: matrix 89 rows 51 cols
[2022-05-15 23:48:02] [INFO ] Computed 1 place invariants in 1 ms
[2022-05-15 23:48:02] [INFO ] Dead Transitions using invariants and state equation in 61 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 51/79 places, 89/132 transitions.
Finished structural reductions, in 1 iterations. Remains : 51/79 places, 89/132 transitions.
Stuttering acceptance computed with spot in 592 ms :[(OR (NOT p1) (NOT p0)), (NOT p0), (NOT p1)]
Running random walk in product with property : AirplaneLD-PT-0020-LTLCardinality-01 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=p0, acceptance={} source=1 dest: 1}, { cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p1), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p1:(LEQ s50 s0), p0:(LEQ (ADD s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s15 s16 s17 s18 s19 s20 s21 s22 s23 s24 s25 s26 s27 s28 s29 s30 s31 s32 s33 s34 ...], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null][true, true, true]]
Stuttering criterion allowed to conclude after 5 steps with 0 reset in 2 ms.
FORMULA AirplaneLD-PT-0020-LTLCardinality-01 FALSE TECHNIQUES STUTTER_TEST
Treatment of property AirplaneLD-PT-0020-LTLCardinality-01 finished in 863 ms.
Running Spot : cd /home/mcc/execution;'/home/mcc/BenchKit/bin//..//ltl2tgba' '--check=stutter' '--hoaf=tv' '-f' '!(X(p0))'
Support contains 21 out of 79 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 79/79 places, 132/132 transitions.
Reduce places removed 3 places and 0 transitions.
Iterating post reduction 0 with 3 rules applied. Total rules applied 3 place count 76 transition count 132
Discarding 39 places :
Symmetric choice reduction at 1 with 39 rule applications. Total rules 42 place count 37 transition count 93
Iterating global reduction 1 with 39 rules applied. Total rules applied 81 place count 37 transition count 93
Ensure Unique test removed 39 transitions
Reduce isomorphic transitions removed 39 transitions.
Iterating post reduction 1 with 39 rules applied. Total rules applied 120 place count 37 transition count 54
Applied a total of 120 rules in 3 ms. Remains 37 /79 variables (removed 42) and now considering 54/132 (removed 78) transitions.
// Phase 1: matrix 54 rows 37 cols
[2022-05-15 23:48:03] [INFO ] Computed 1 place invariants in 1 ms
[2022-05-15 23:48:03] [INFO ] Implicit Places using invariants in 493 ms returned [36]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 503 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 36/79 places, 54/132 transitions.
Applied a total of 0 rules in 1 ms. Remains 36 /36 variables (removed 0) and now considering 54/54 (removed 0) transitions.
Finished structural reductions, in 2 iterations. Remains : 36/79 places, 54/132 transitions.
Stuttering acceptance computed with spot in 116 ms :[(NOT p0), (NOT p0), true]
Running random walk in product with property : AirplaneLD-PT-0020-LTLCardinality-07 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={} source=0 dest: 2}], [{ cond=true, acceptance={} source=1 dest: 0}], [{ cond=true, acceptance={0} source=2 dest: 2}]], initial=1, aps=[p0:(AND (GT 1 (ADD s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s15 s16 s17 s18 s19 s20)) (LEQ s26 (ADD s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s...], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA AirplaneLD-PT-0020-LTLCardinality-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property AirplaneLD-PT-0020-LTLCardinality-07 finished in 648 ms.
All properties solved by simple procedures.
Total runtime 4597 ms.

BK_STOP 1652658484136

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

+ export LANG=C
+ LANG=C
+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ LTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution LTLCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ export PYTHONPATH=/usr/lib/python3.9/site-packages/
+ PYTHONPATH=/usr/lib/python3.9/site-packages/
+ export LD_LIBRARY_PATH=/usr/local/lib:
+ LD_LIBRARY_PATH=/usr/local/lib:
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202205111006.jar
+ VERSION=202205111006
+ echo 'Running Version 202205111006'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data @none -pnfolder /home/mcc/execution -examination LTLCardinality -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=@none -Xss128m -Xms40m -Xmx8192m

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="AirplaneLD-PT-0020"
export BK_EXAMINATION="LTLCardinality"
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 2-4028"
echo " Executing tool itstools"
echo " Input is AirplaneLD-PT-0020, 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 r006-tajo-165245689000251"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/AirplaneLD-PT-0020.tgz
mv AirplaneLD-PT-0020 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 ;