fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r490-tall-167912709701255
Last Updated
May 14, 2023

About the Execution of Marcie+red for ViralEpidemic-PT-S02D1C1A12

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
10587.468 653588.00 679120.00 1995.80 TFTTTTFFFFTFTTTT normal

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.r490-tall-167912709701255.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 marciexred
Input is ViralEpidemic-PT-S02D1C1A12, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r490-tall-167912709701255
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 20M
-rw-r--r-- 1 mcc users 11K Feb 25 22:07 CTLCardinality.txt
-rw-r--r-- 1 mcc users 92K Feb 25 22:07 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.7K Feb 25 20:51 CTLFireability.txt
-rw-r--r-- 1 mcc users 47K Feb 25 20:51 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.8K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 5.6K Feb 25 17:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 31K Feb 25 17:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.1K Feb 25 17:26 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 17:26 LTLFireability.xml
-rw-r--r-- 1 mcc users 21K Feb 25 23:53 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 161K Feb 25 23:53 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.5K Feb 25 22:42 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 57K Feb 25 22:42 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.0K Feb 25 17:26 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.1K Feb 25 17:26 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 11 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 19M Mar 5 18:23 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 ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-00
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-01
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-02
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-03
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-04
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-05
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-06
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-07
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-08
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-09
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-10
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-11
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-12
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-13
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-14
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1679407477970

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=marciexred
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=ViralEpidemic-PT-S02D1C1A12
Applying reductions before tool marcie
Invoking reducer
Running Version 202303021504
[2023-03-21 14:04:39] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2023-03-21 14:04:39] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-21 14:04:40] [INFO ] Load time of PNML (sax parser for PT used): 959 ms
[2023-03-21 14:04:40] [INFO ] Transformed 32765 places.
[2023-03-21 14:04:40] [INFO ] Transformed 40955 transitions.
[2023-03-21 14:04:40] [INFO ] Parsed PT model containing 32765 places and 40955 transitions and 90101 arcs in 1309 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 30 ms.
Working with output stream class java.io.PrintStream
Incomplete random walk after 10000 steps, including 960 resets, run finished after 2511 ms. (steps per millisecond=3 ) properties (out of 16) seen :1
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 195 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 191 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1000 steps, including 13 resets, run finished after 211 ms. (steps per millisecond=4 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 20 resets, run finished after 187 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 21 resets, run finished after 183 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 9 resets, run finished after 189 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 15 resets, run finished after 184 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 188 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 14 resets, run finished after 184 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 23 resets, run finished after 183 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 15 resets, run finished after 183 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 7 resets, run finished after 188 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 16 resets, run finished after 188 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 187 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 188 ms. (steps per millisecond=5 ) properties (out of 15) seen :0
Interrupted probabilistic random walk after 28626 steps, run timeout after 15005 ms. (steps per millisecond=1 ) properties seen :{6=1, 11=1}
Probabilistic random walk after 28626 steps, saw 27507 distinct states, run finished after 15006 ms. (steps per millisecond=1 ) properties seen :2
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-12 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-07 FALSE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
Running SMT prover for 13 properties.
// Phase 1: matrix 40955 rows 32765 cols
[2023-03-21 14:05:10] [INFO ] Invariants computation overflowed in 9520 ms
[2023-03-21 14:05:36] [INFO ] After 10246ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1 real:11
[2023-03-21 14:05:36] [INFO ] After 10297ms SMT Verify possible using trap constraints in real domain returned unsat :0 sat :1 real:11
Attempting to minimize the solution found.
Minimization took 12 ms.
[2023-03-21 14:05:36] [INFO ] After 25121ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :1 real:11
[2023-03-21 14:06:01] [INFO ] After 11146ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :12
[2023-03-21 14:06:01] [INFO ] After 11147ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :12
Attempting to minimize the solution found.
Minimization took 18 ms.
[2023-03-21 14:06:01] [INFO ] After 25032ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :12
Fused 13 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 250 out of 32765 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 32765/32765 places, 40955/40955 transitions.
Graph (complete) has 16382 edges and 32765 vertex of which 1213 are kept as prefixes of interest. Removing 31552 places using SCC suffix rule.30 ms
Discarding 31552 places :
Also discarding 38208 output transitions
Drop transitions removed 38208 transitions
Drop transitions removed 1585 transitions
Reduce isomorphic transitions removed 1585 transitions.
Drop transitions removed 306 transitions
Trivial Post-agglo rules discarded 306 transitions
Performed 306 trivial Post agglomeration. Transition count delta: 306
Iterating post reduction 0 with 1891 rules applied. Total rules applied 1892 place count 1213 transition count 856
Reduce places removed 306 places and 0 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Iterating post reduction 1 with 308 rules applied. Total rules applied 2200 place count 907 transition count 854
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 2 with 2 rules applied. Total rules applied 2202 place count 905 transition count 854
Performed 120 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 120 Pre rules applied. Total rules applied 2202 place count 905 transition count 734
Deduced a syphon composed of 120 places in 1 ms
Reduce places removed 120 places and 0 transitions.
Iterating global reduction 3 with 240 rules applied. Total rules applied 2442 place count 785 transition count 734
Discarding 28 places :
Symmetric choice reduction at 3 with 28 rule applications. Total rules 2470 place count 757 transition count 706
Iterating global reduction 3 with 28 rules applied. Total rules applied 2498 place count 757 transition count 706
Performed 122 Post agglomeration using F-continuation condition.Transition count delta: 122
Deduced a syphon composed of 122 places in 0 ms
Reduce places removed 122 places and 0 transitions.
Iterating global reduction 3 with 244 rules applied. Total rules applied 2742 place count 635 transition count 584
Renaming transitions due to excessive name length > 1024 char.
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 3 with 1 rules applied. Total rules applied 2743 place count 634 transition count 583
Applied a total of 2743 rules in 399 ms. Remains 634 /32765 variables (removed 32131) and now considering 583/40955 (removed 40372) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 399 ms. Remains : 634/32765 places, 583/40955 transitions.
Incomplete random walk after 10000 steps, including 30 resets, run finished after 209 ms. (steps per millisecond=47 ) properties (out of 13) seen :12
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-15 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-13 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-11 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-09 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-06 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-01 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-00 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 72 ms. (steps per millisecond=138 ) properties (out of 1) seen :0
Running SMT prover for 1 properties.
// Phase 1: matrix 583 rows 634 cols
[2023-03-21 14:06:01] [INFO ] Computed 54 place invariants in 11 ms
[2023-03-21 14:06:01] [INFO ] [Real]Absence check using 0 positive and 54 generalized place invariants in 8 ms returned sat
[2023-03-21 14:06:02] [INFO ] After 315ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-03-21 14:06:02] [INFO ] [Nat]Absence check using 0 positive and 54 generalized place invariants in 8 ms returned sat
[2023-03-21 14:06:02] [INFO ] After 196ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-03-21 14:06:02] [INFO ] After 264ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 57 ms.
[2023-03-21 14:06:02] [INFO ] After 410ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Finished Parikh walk after 121 steps, including 0 resets, run visited all 1 properties in 6 ms. (steps per millisecond=20 )
FORMULA ViralEpidemic-PT-S02D1C1A12-ReachabilityFireability-08 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Parikh walk visited 1 properties in 7 ms.
All properties solved without resorting to model-checking.
Total runtime 83175 ms.
timeout --kill-after=10s --signal=SIGINT 1m for testing only

Marcie built on Linux at 2019-11-18.
A model checker for Generalized Stochastic Petri nets

authors: Alex Tovchigrechko (IDD package and CTL model checking)

Martin Schwarick (Symbolic numerical analysis and CSL model checking)

Christian Rohr (Simulative and approximative numerical model checking)

marcie@informatik.tu-cottbus.de

called as: /home/mcc/BenchKit/bin//../reducer/bin//../../marcie/bin/marcie --net-file=model.pnml --mcc-file=ReachabilityFireability.xml --memory=6 --mcc-mode

parse successfull
net created successfully

Net: ViralEpidemic_PT_S02D1C1A12
(NrP: 32765 NrTr: 40955 NrArc: 90101)

parse formulas
formulas created successfully
place and transition orderings generation:3m51.229sec

net check time: 0m 0.023sec

init dd package: 0m 2.560sec


before gc: list nodes free: 819000

after gc: idd nodes used:11314, unused:63988686; list nodes free:320762430

before gc: list nodes free: 800260

after gc: idd nodes used:15999, unused:63984001; list nodes free:320720265

before gc: list nodes free: 5949170

after gc: idd nodes used:19594, unused:63980406; list nodes free:320694334

before gc: list nodes free: 15110750

after gc: idd nodes used:22624, unused:63977376; list nodes free:320673124

before gc: list nodes free: 21015670

after gc: idd nodes used:25294, unused:63974706; list nodes free:320654434

before gc: list nodes free: 25202220

after gc: idd nodes used:27708, unused:63972292; list nodes free:320637536

before gc: list nodes free: 28376228

after gc: idd nodes used:29927, unused:63970073; list nodes free:320622003

before gc: list nodes free: 30890301

after gc: idd nodes used:31993, unused:63968007; list nodes free:320607541

BK_STOP 1679408131558

--------------------
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 ReachabilityFireability -timeout 360 -rebuildPNML
check for maximal unmarked siphon
ok
check for constant places
ok
check if there are places and transitions
ok
check if there are transitions without pre-places
ok
check if at least one transition is enabled in m0
ok
check if there are transitions that can never fire
ok


initing FirstDep: 0m 1.278sec

/home/mcc/BenchKit/bin//../reducer/bin//../../marcie/bin//../BenchKit_head.sh: line 16: 473 Segmentation fault ${MARCIE} --net-file=model.pnml --mcc-file=${BK_EXAMINATION}.xml ${MARCIE_CONFIG}

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="ViralEpidemic-PT-S02D1C1A12"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="marciexred"
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 marciexred"
echo " Input is ViralEpidemic-PT-S02D1C1A12, examination is ReachabilityFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r490-tall-167912709701255"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ViralEpidemic-PT-S02D1C1A12.tgz
mv ViralEpidemic-PT-S02D1C1A12 execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityFireability.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;