About the Execution of LoLa+red for Diffusion2D-PT-D10N100
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.r135-smll-167819413600133.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)
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=====================================================================
Generated by BenchKit 2-5348
Executing tool lolaxred
Input is Diffusion2D-PT-D10N100, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r135-smll-167819413600133
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 748K
-rw-r--r-- 1 mcc users 7.3K Feb 26 04:03 CTLCardinality.txt
-rw-r--r-- 1 mcc users 70K Feb 26 04:03 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.1K Feb 26 04:01 CTLFireability.txt
-rw-r--r-- 1 mcc users 51K Feb 26 04:01 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 4.4K Feb 25 15:57 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K Feb 25 15:57 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Feb 25 15:57 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 15:57 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Feb 26 04:04 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 126K Feb 26 04:04 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 14K Feb 26 04:03 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 103K Feb 26 04:03 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Feb 25 15:57 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 25 15:57 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 8 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 255K Mar 5 18:22 model.pnml
--------------------
content from stdout:
=== Data for post analysis generated by BenchKit (invocation template)
The expected result is a vector of positive values
NUM_VECTOR
here is the order used to build the result vector(from text file)
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-00
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-01
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-02
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-03
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-04
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-05
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-06
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-07
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-08
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-09
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-10
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-11
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-12
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-13
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-14
FORMULA_NAME Diffusion2D-PT-D10N100-UpperBounds-15
=== Now, execution of the tool begins
BK_START 1678284076869
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=lolaxred
BK_EXAMINATION=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Diffusion2D-PT-D10N100
Applying reductions before tool lola
Invoking reducer
Running Version 202303021504
[2023-03-08 14:01:20] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -timeout, 360, -rebuildPNML]
[2023-03-08 14:01:20] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-08 14:01:21] [INFO ] Load time of PNML (sax parser for PT used): 193 ms
[2023-03-08 14:01:21] [INFO ] Transformed 100 places.
[2023-03-08 14:01:21] [INFO ] Transformed 684 transitions.
[2023-03-08 14:01:21] [INFO ] Parsed PT model containing 100 places and 684 transitions and 1368 arcs in 405 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 10 ms.
// Phase 1: matrix 684 rows 100 cols
[2023-03-08 14:01:21] [INFO ] Computed 1 place invariants in 47 ms
Incomplete random walk after 10002 steps, including 2 resets, run finished after 11 ms. (steps per millisecond=909 ) properties (out of 16) seen :801
FORMULA Diffusion2D-PT-D10N100-UpperBounds-12 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-11 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-05 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-04 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-03 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-02 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-01 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-00 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 14 ms. (steps per millisecond=714 ) properties (out of 8) seen :5
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 12 ms. (steps per millisecond=833 ) properties (out of 8) seen :2
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 12 ms. (steps per millisecond=833 ) properties (out of 8) seen :2
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 10 ms. (steps per millisecond=1000 ) properties (out of 8) seen :4
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 20 ms. (steps per millisecond=500 ) properties (out of 8) seen :4
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 10 ms. (steps per millisecond=1000 ) properties (out of 8) seen :1
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 10 ms. (steps per millisecond=1000 ) properties (out of 8) seen :3
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 11 ms. (steps per millisecond=909 ) properties (out of 8) seen :7
[2023-03-08 14:01:21] [INFO ] Invariant cache hit.
[2023-03-08 14:01:22] [INFO ] [Real]Absence check using 1 positive place invariants in 38 ms returned sat
[2023-03-08 14:01:22] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:22] [INFO ] [Real]Absence check using state equation in 372 ms returned sat
[2023-03-08 14:01:22] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 149 ms.
[2023-03-08 14:01:22] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:23] [INFO ] [Nat]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:23] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:23] [INFO ] [Nat]Absence check using state equation in 244 ms returned sat
[2023-03-08 14:01:23] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 124 ms.
[2023-03-08 14:01:27] [INFO ] Added : 280 causal constraints over 56 iterations in 4640 ms. Result :unknown
[2023-03-08 14:01:28] [INFO ] [Real]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:28] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:28] [INFO ] [Real]Absence check using state equation in 241 ms returned sat
[2023-03-08 14:01:28] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 248 ms.
[2023-03-08 14:01:28] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:28] [INFO ] [Nat]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:28] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:29] [INFO ] [Nat]Absence check using state equation in 167 ms returned sat
[2023-03-08 14:01:29] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 126 ms.
[2023-03-08 14:01:33] [INFO ] Added : 265 causal constraints over 53 iterations in 4756 ms. Result :unknown
[2023-03-08 14:01:33] [INFO ] [Real]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:33] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:34] [INFO ] [Real]Absence check using state equation in 221 ms returned sat
[2023-03-08 14:01:34] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 118 ms.
[2023-03-08 14:01:34] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:34] [INFO ] [Nat]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:34] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:34] [INFO ] [Nat]Absence check using state equation in 221 ms returned sat
[2023-03-08 14:01:34] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 78 ms.
[2023-03-08 14:01:39] [INFO ] Added : 285 causal constraints over 57 iterations in 4709 ms. Result :unknown
[2023-03-08 14:01:39] [INFO ] [Real]Absence check using 1 positive place invariants in 4 ms returned sat
[2023-03-08 14:01:39] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:39] [INFO ] [Real]Absence check using state equation in 182 ms returned sat
[2023-03-08 14:01:39] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 59 ms.
[2023-03-08 14:01:39] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:39] [INFO ] [Nat]Absence check using 1 positive place invariants in 4 ms returned sat
[2023-03-08 14:01:39] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:40] [INFO ] [Nat]Absence check using state equation in 205 ms returned sat
[2023-03-08 14:01:40] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 75 ms.
[2023-03-08 14:01:44] [INFO ] Added : 270 causal constraints over 54 iterations in 4731 ms. Result :unknown
[2023-03-08 14:01:44] [INFO ] [Real]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:44] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:45] [INFO ] [Real]Absence check using state equation in 202 ms returned sat
[2023-03-08 14:01:45] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 69 ms.
[2023-03-08 14:01:45] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:45] [INFO ] [Nat]Absence check using 1 positive place invariants in 2 ms returned sat
[2023-03-08 14:01:45] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:45] [INFO ] [Nat]Absence check using state equation in 176 ms returned sat
[2023-03-08 14:01:45] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 70 ms.
[2023-03-08 14:01:50] [INFO ] Added : 310 causal constraints over 62 iterations in 4765 ms. Result :unknown
[2023-03-08 14:01:50] [INFO ] [Real]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:50] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:50] [INFO ] [Real]Absence check using state equation in 200 ms returned sat
[2023-03-08 14:01:50] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:50] [INFO ] [Nat]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:50] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:50] [INFO ] [Nat]Absence check using state equation in 190 ms returned sat
[2023-03-08 14:01:51] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 43 ms.
[2023-03-08 14:01:55] [INFO ] Added : 275 causal constraints over 55 iterations in 4738 ms. Result :unknown
[2023-03-08 14:01:55] [INFO ] [Real]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:55] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:56] [INFO ] [Real]Absence check using state equation in 227 ms returned sat
[2023-03-08 14:01:56] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 62 ms.
[2023-03-08 14:01:56] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:01:56] [INFO ] [Nat]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:01:56] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:01:56] [INFO ] [Nat]Absence check using state equation in 191 ms returned sat
[2023-03-08 14:01:56] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 71 ms.
[2023-03-08 14:02:01] [INFO ] Added : 275 causal constraints over 55 iterations in 4743 ms. Result :unknown
[2023-03-08 14:02:01] [INFO ] [Real]Absence check using 1 positive place invariants in 4 ms returned sat
[2023-03-08 14:02:01] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-08 14:02:01] [INFO ] [Real]Absence check using state equation in 176 ms returned sat
[2023-03-08 14:02:01] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 70 ms.
[2023-03-08 14:02:01] [INFO ] Solution in real domain found non-integer solution.
[2023-03-08 14:02:01] [INFO ] [Nat]Absence check using 1 positive place invariants in 3 ms returned sat
[2023-03-08 14:02:01] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-08 14:02:01] [INFO ] [Nat]Absence check using state equation in 197 ms returned sat
[2023-03-08 14:02:02] [INFO ] Computed and/alt/rep : 676/4868/676 causal constraints (skipped 0 transitions) in 75 ms.
[2023-03-08 14:02:06] [INFO ] Added : 275 causal constraints over 55 iterations in 4739 ms. Result :unknown
Current structural bounds on expressions (after SMT) : [100, 100, 100, 100, 100, 100, 100, 100] Max seen :[3, 1, 1, 1, 2, 0, 2, 4]
Support contains 8 out of 100 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 100/100 places, 684/684 transitions.
Graph (trivial) has 600 edges and 100 vertex of which 92 / 100 are part of one of the 1 SCC in 6 ms
Free SCC test removed 91 places
Drop transitions removed 600 transitions
Ensure Unique test removed 64 transitions
Reduce isomorphic transitions removed 664 transitions.
Drop transitions removed 6 transitions
Redundant transition composition rules discarded 6 transitions
Iterating global reduction 0 with 6 rules applied. Total rules applied 7 place count 9 transition count 14
Applied a total of 7 rules in 52 ms. Remains 9 /100 variables (removed 91) and now considering 14/684 (removed 670) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 53 ms. Remains : 9/100 places, 14/684 transitions.
// Phase 1: matrix 14 rows 9 cols
[2023-03-08 14:02:11] [INFO ] Computed 1 place invariants in 1 ms
Incomplete random walk after 1000071 steps, including 2 resets, run finished after 189 ms. (steps per millisecond=5291 ) properties (out of 8) seen :800
FORMULA Diffusion2D-PT-D10N100-UpperBounds-15 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-14 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-13 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-10 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-09 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-08 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-07 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA Diffusion2D-PT-D10N100-UpperBounds-06 100 TECHNIQUES TOPOLOGICAL RANDOM_WALK
All properties solved without resorting to model-checking.
Total runtime 50802 ms.
ITS solved all properties within timeout
BK_STOP 1678284132873
--------------------
content from stderr:
+ 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:
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination UpperBounds -timeout 360 -rebuildPNML
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="Diffusion2D-PT-D10N100"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="lolaxred"
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 2-5348"
echo " Executing tool lolaxred"
echo " Input is Diffusion2D-PT-D10N100, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r135-smll-167819413600133"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/Diffusion2D-PT-D10N100.tgz
mv Diffusion2D-PT-D10N100 execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "UpperBounds.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 '
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;