Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2024-input.r277-smll-171654416800122.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5568
Executing tool itstools
Input is PermAdmissibility-PT-50, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r277-smll-171654416800122
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.7M
-rw-r--r-- 1 mcc users 9.3K Apr 12 09:07 CTLCardinality.txt
-rw-r--r-- 1 mcc users 81K Apr 12 09:07 CTLCardinality.xml
-rw-r--r-- 1 mcc users 56K Apr 12 09:05 CTLFireability.txt
-rw-r--r-- 1 mcc users 296K Apr 12 09:05 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:43 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 5.3K Apr 23 07:42 LTLCardinality.txt
-rw-r--r-- 1 mcc users 33K Apr 23 07:42 LTLCardinality.xml
-rw-r--r-- 1 mcc users 13K Apr 23 07:42 LTLFireability.txt
-rw-r--r-- 1 mcc users 53K Apr 23 07:42 LTLFireability.xml
-rw-r--r-- 1 mcc users 13K Apr 12 09:15 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 108K Apr 12 09:15 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 98K Apr 12 09:14 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 501K Apr 12 09:14 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.0K Apr 23 07:42 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.6K Apr 23 07:42 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 18 16:43 equiv_col
-rw-r--r-- 1 mcc users 3 May 18 16:43 instance
-rw-r--r-- 1 mcc users 6 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 340K May 18 16:43 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 QuasiLiveness

=== Now, execution of the tool begins

BK_START 1716764347998

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=QuasiLiveness
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=PermAdmissibility-PT-50
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
QuasiLiveness PT
Running Version 202405141337
[2024-05-26 22:59:10] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, QuasiLiveness, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2024-05-26 22:59:10] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-26 22:59:11] [INFO ] Load time of PNML (sax parser for PT used): 264 ms
[2024-05-26 22:59:11] [INFO ] Transformed 168 places.
[2024-05-26 22:59:11] [INFO ] Transformed 592 transitions.
[2024-05-26 22:59:11] [INFO ] Parsed PT model containing 168 places and 592 transitions and 3456 arcs in 532 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 168/168 places, 592/592 transitions.
Reduce places removed 64 places and 0 transitions.
Iterating post reduction 0 with 64 rules applied. Total rules applied 64 place count 104 transition count 592
Applied a total of 64 rules in 86 ms. Remains 104 /168 variables (removed 64) and now considering 592/592 (removed 0) transitions.
// Phase 1: matrix 592 rows 104 cols
[2024-05-26 22:59:11] [INFO ] Computed 16 invariants in 71 ms
[2024-05-26 22:59:12] [INFO ] Implicit Places using invariants in 769 ms returned []
[2024-05-26 22:59:12] [INFO ] Invariant cache hit.
[2024-05-26 22:59:13] [INFO ] Implicit Places using invariants and state equation in 965 ms returned []
Implicit Place search using SMT with State Equation took 1817 ms to find 0 implicit places.
Running 588 sub problems to find dead transitions.
[2024-05-26 22:59:13] [INFO ] Invariant cache hit.
At refinement iteration 0 (INCLUDED_ONLY) 0/103 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/103 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 2 (OVERLAPS) 1/104 variables, 13/16 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/104 variables, 0/16 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 4 (OVERLAPS) 592/696 variables, 104/120 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/696 variables, 0/120 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 6 (OVERLAPS) 0/696 variables, 0/120 constraints. Problems are: Problem set: 0 solved, 588 unsolved
No progress, stopping.
After SMT solving in domain Real declared 696/696 variables, and 120 constraints, problems are : Problem set: 0 solved, 588 unsolved in 30050 ms.
Refiners :[Generalized P Invariants (flows): 16/16 constraints, State Equation: 104/104 constraints, PredecessorRefiner: 588/588 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 588 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/103 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/103 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 2 (OVERLAPS) 1/104 variables, 13/16 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/104 variables, 0/16 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 4 (OVERLAPS) 592/696 variables, 104/120 constraints. Problems are: Problem set: 0 solved, 588 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/696 variables, 588/708 constraints. Problems are: Problem set: 0 solved, 588 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 696/696 variables, and 708 constraints, problems are : Problem set: 0 solved, 588 unsolved in 30031 ms.
Refiners :[Generalized P Invariants (flows): 16/16 constraints, State Equation: 104/104 constraints, PredecessorRefiner: 588/588 constraints, Known Traps: 0/0 constraints]
After SMT, in 62451ms problems are : Problem set: 0 solved, 588 unsolved
Search for dead transitions found 0 dead transitions in 62509ms
Starting structural reductions in LIVENESS mode, iteration 1 : 104/168 places, 592/592 transitions.
Finished structural reductions in LIVENESS mode , in 1 iterations and 64483 ms. Remains : 104/168 places, 592/592 transitions.
Initial state reduction rules removed 4 formulas.
RANDOM walk for 40055 steps (48 resets) in 1289 ms. (31 steps per ms) remains 80/588 properties
BEST_FIRST walk for 4004 steps (8 resets) in 85 ms. (46 steps per ms) remains 65/80 properties
BEST_FIRST walk for 4003 steps (8 resets) in 80 ms. (49 steps per ms) remains 63/65 properties
BEST_FIRST walk for 4003 steps (8 resets) in 49 ms. (80 steps per ms) remains 59/63 properties
BEST_FIRST walk for 4004 steps (8 resets) in 46 ms. (85 steps per ms) remains 56/59 properties
BEST_FIRST walk for 4004 steps (8 resets) in 43 ms. (91 steps per ms) remains 52/56 properties
BEST_FIRST walk for 4004 steps (8 resets) in 42 ms. (93 steps per ms) remains 51/52 properties
BEST_FIRST walk for 4004 steps (8 resets) in 28 ms. (138 steps per ms) remains 51/51 properties
BEST_FIRST walk for 4003 steps (8 resets) in 41 ms. (95 steps per ms) remains 51/51 properties
BEST_FIRST walk for 4004 steps (8 resets) in 37 ms. (105 steps per ms) remains 48/51 properties
BEST_FIRST walk for 4004 steps (8 resets) in 28 ms. (138 steps per ms) remains 45/48 properties
BEST_FIRST walk for 4004 steps (8 resets) in 25 ms. (154 steps per ms) remains 45/45 properties
BEST_FIRST walk for 4004 steps (8 resets) in 31 ms. (125 steps per ms) remains 44/45 properties
BEST_FIRST walk for 4004 steps (8 resets) in 24 ms. (160 steps per ms) remains 44/44 properties
BEST_FIRST walk for 4004 steps (8 resets) in 30 ms. (129 steps per ms) remains 43/44 properties
BEST_FIRST walk for 4004 steps (8 resets) in 28 ms. (138 steps per ms) remains 43/43 properties
BEST_FIRST walk for 4004 steps (8 resets) in 27 ms. (143 steps per ms) remains 43/43 properties
BEST_FIRST walk for 4004 steps (8 resets) in 19 ms. (200 steps per ms) remains 43/43 properties
BEST_FIRST walk for 4004 steps (8 resets) in 24 ms. (160 steps per ms) remains 43/43 properties
BEST_FIRST walk for 4004 steps (8 resets) in 29 ms. (133 steps per ms) remains 42/43 properties
BEST_FIRST walk for 4004 steps (8 resets) in 20 ms. (190 steps per ms) remains 42/42 properties
BEST_FIRST walk for 4004 steps (8 resets) in 30 ms. (129 steps per ms) remains 42/42 properties
BEST_FIRST walk for 4004 steps (8 resets) in 24 ms. (160 steps per ms) remains 42/42 properties
BEST_FIRST walk for 4004 steps (8 resets) in 20 ms. (190 steps per ms) remains 41/42 properties
BEST_FIRST walk for 4004 steps (8 resets) in 20 ms. (190 steps per ms) remains 40/41 properties
BEST_FIRST walk for 4004 steps (8 resets) in 18 ms. (210 steps per ms) remains 40/40 properties
BEST_FIRST walk for 4004 steps (8 resets) in 29 ms. (133 steps per ms) remains 39/40 properties
BEST_FIRST walk for 4004 steps (8 resets) in 25 ms. (154 steps per ms) remains 38/39 properties
BEST_FIRST walk for 4003 steps (8 resets) in 25 ms. (153 steps per ms) remains 38/38 properties
BEST_FIRST walk for 4004 steps (8 resets) in 24 ms. (160 steps per ms) remains 38/38 properties
BEST_FIRST walk for 4004 steps (8 resets) in 28 ms. (138 steps per ms) remains 37/38 properties
BEST_FIRST walk for 4004 steps (8 resets) in 27 ms. (143 steps per ms) remains 36/37 properties
BEST_FIRST walk for 4004 steps (8 resets) in 23 ms. (166 steps per ms) remains 36/36 properties
BEST_FIRST walk for 4003 steps (8 resets) in 27 ms. (142 steps per ms) remains 35/36 properties
BEST_FIRST walk for 4004 steps (8 resets) in 25 ms. (154 steps per ms) remains 34/35 properties
[2024-05-26 23:00:16] [INFO ] Flatten gal took : 457 ms
BEST_FIRST walk for 4004 steps (8 resets) in 20 ms. (190 steps per ms) remains 33/34 properties
BEST_FIRST walk for 4004 steps (8 resets) in 18 ms. (210 steps per ms) remains 32/33 properties
BEST_FIRST walk for 4004 steps (8 resets) in 16 ms. (235 steps per ms) remains 31/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 21 ms. (182 steps per ms) remains 30/31 properties
[2024-05-26 23:00:16] [INFO ] Invariant cache hit.
[2024-05-26 23:00:17] [INFO ] Flatten gal took : 160 ms
[2024-05-26 23:00:17] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality11101790503771085775.gal : 97 ms
[2024-05-26 23:00:17] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality16602586980875458982.prop : 2 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality11101790503771085775.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality16602586980875458982.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...330
At refinement iteration 0 (INCLUDED_ONLY) 0/38 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 1 (OVERLAPS) 40/78 variables, 6/6 constraints. Problems are: Problem set: 0 solved, 30 unsolved
Loading property file /tmp/ReachabilityCardinality16602586980875458982.prop.
SDD proceeding with computation,30 properties remain. new max is 4
SDD size :1 after 15
SDD proceeding with computation,30 properties remain. new max is 8
SDD size :15 after 55
SDD proceeding with computation,30 properties remain. new max is 16
SDD size :55 after 190
At refinement iteration 2 (INCLUDED_ONLY) 0/78 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 30 unsolved
SDD proceeding with computation,30 properties remain. new max is 32
SDD size :190 after 666
At refinement iteration 3 (OVERLAPS) 26/104 variables, 10/16 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/104 variables, 0/16 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 5 (OVERLAPS) 592/696 variables, 104/120 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/696 variables, 0/120 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 7 (OVERLAPS) 0/696 variables, 0/120 constraints. Problems are: Problem set: 0 solved, 30 unsolved
No progress, stopping.
After SMT solving in domain Real declared 696/696 variables, and 120 constraints, problems are : Problem set: 0 solved, 30 unsolved in 2274 ms.
Refiners :[Generalized P Invariants (flows): 16/16 constraints, State Equation: 104/104 constraints, PredecessorRefiner: 30/30 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 30 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/38 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 1 (OVERLAPS) 40/78 variables, 6/6 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/78 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 3 (OVERLAPS) 26/104 variables, 10/16 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/104 variables, 0/16 constraints. Problems are: Problem set: 0 solved, 30 unsolved
At refinement iteration 5 (OVERLAPS) 592/696 variables, 104/120 constraints. Problems are: Problem set: 0 solved, 30 unsolved
SDD proceeding with computation,30 properties remain. new max is 64
SDD size :666 after 24054
At refinement iteration 6 (INCLUDED_ONLY) 0/696 variables, 30/150 constraints. Problems are: Problem set: 0 solved, 30 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 696/696 variables, and 150 constraints, problems are : Problem set: 0 solved, 30 unsolved in 5008 ms.
Refiners :[Generalized P Invariants (flows): 16/16 constraints, State Equation: 104/104 constraints, PredecessorRefiner: 30/30 constraints, Known Traps: 0/0 constraints]
After SMT, in 7438ms problems are : Problem set: 0 solved, 30 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 38 out of 104 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 104/104 places, 592/592 transitions.
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 1 place count 103 transition count 576
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 103 transition count 576
Applied a total of 2 rules in 102 ms. Remains 103 /104 variables (removed 1) and now considering 576/592 (removed 16) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 102 ms. Remains : 103/104 places, 576/592 transitions.
RANDOM walk for 364269 steps (443 resets) in 1692 ms. (215 steps per ms) remains 0/30 properties
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
Able to resolve query QuasiLiveness after proving 592 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK BESTFIRST_WALK TOPOLOGICAL INITIAL_STATE
Total runtime 74291 ms.

BK_STOP 1716764425113

--------------------
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
+ [[ QuasiLiveness = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution QuasiLiveness -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//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202405141337.jar
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination QuasiLiveness -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="PermAdmissibility-PT-50"
export BK_EXAMINATION="QuasiLiveness"
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 2-5568"
echo " Executing tool itstools"
echo " Input is PermAdmissibility-PT-50, examination is QuasiLiveness"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r277-smll-171654416800122"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PermAdmissibility-PT-50.tgz
mv PermAdmissibility-PT-50 execution
cd execution
if [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "UpperBounds" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] || [ "QuasiLiveness" = "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 [ "QuasiLiveness" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "QuasiLiveness" != "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 "QuasiLiveness.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property QuasiLiveness.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "QuasiLiveness.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 '' QuasiLiveness.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] ; then
echo "FORMULA_NAME QuasiLiveness"
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 ;