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.r025-smll-171620166500375.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)
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=====================================================================
Generated by BenchKit 2-5568
Executing tool greatspnxred
Input is AutonomousCar-PT-10b, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r025-smll-171620166500375
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.9M
-rw-r--r-- 1 mcc users 7.7K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 85K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.1K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 43K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.7K May 19 07:06 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K May 19 15:28 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K May 19 07:13 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 19 17:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.7K Apr 12 18:03 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 88K Apr 12 18:03 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 5.7K Apr 12 18:03 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 41K Apr 12 18:03 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Apr 22 14:29 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Apr 22 14:29 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:42 equiv_col
-rw-r--r-- 1 mcc users 4 May 18 16:42 instance
-rw-r--r-- 1 mcc users 6 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 1.6M May 18 16:42 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 AutonomousCar-PT-10b-ReachabilityFireability-2024-00
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-01
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-02
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-03
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-04
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-05
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-06
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-07
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-08
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-09
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-10
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-11
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-12
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-13
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-14
FORMULA_NAME AutonomousCar-PT-10b-ReachabilityFireability-2024-15

=== Now, execution of the tool begins

BK_START 1716366571539

Invoking MCC driver with
BK_TOOL=greatspnxred
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=AutonomousCar-PT-10b
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool greatspn
Invoking reducer
Running Version 202405141337
[2024-05-22 08:29:34] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2024-05-22 08:29:34] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-22 08:29:34] [INFO ] Load time of PNML (sax parser for PT used): 698 ms
[2024-05-22 08:29:35] [INFO ] Transformed 425 places.
[2024-05-22 08:29:35] [INFO ] Transformed 2252 transitions.
[2024-05-22 08:29:35] [INFO ] Found NUPN structural information;
[2024-05-22 08:29:35] [INFO ] Parsed PT model containing 425 places and 2252 transitions and 29816 arcs in 975 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 19 ms.
Working with output stream class java.io.PrintStream
RANDOM walk for 40000 steps (306 resets) in 3715 ms. (10 steps per ms) remains 13/16 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-14 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-13 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (52 resets) in 882 ms. (45 steps per ms) remains 12/13 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-00 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40004 steps (40 resets) in 235 ms. (169 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40003 steps (40 resets) in 286 ms. (139 steps per ms) remains 11/12 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-01 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40003 steps (49 resets) in 361 ms. (110 steps per ms) remains 10/11 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-03 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40003 steps (53 resets) in 176 ms. (226 steps per ms) remains 10/10 properties
BEST_FIRST walk for 40004 steps (51 resets) in 200 ms. (199 steps per ms) remains 9/10 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-05 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40004 steps (58 resets) in 554 ms. (72 steps per ms) remains 9/9 properties
BEST_FIRST walk for 40004 steps (58 resets) in 317 ms. (125 steps per ms) remains 8/9 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-07 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40003 steps (63 resets) in 1882 ms. (21 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40004 steps (61 resets) in 190 ms. (209 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40004 steps (56 resets) in 539 ms. (74 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40004 steps (38 resets) in 290 ms. (137 steps per ms) remains 7/8 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-12 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 40004 steps (54 resets) in 93 ms. (425 steps per ms) remains 6/7 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-15 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
// Phase 1: matrix 2252 rows 425 cols
[2024-05-22 08:29:38] [INFO ] Computed 15 invariants in 55 ms
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/59 variables, 59/59 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/59 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 6 unsolved
Problem AutonomousCar-PT-10b-ReachabilityFireability-2024-08 is UNSAT
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-08 FALSE TECHNIQUES SMT_REFINEMENT
Problem AutonomousCar-PT-10b-ReachabilityFireability-2024-11 is UNSAT
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-11 FALSE TECHNIQUES SMT_REFINEMENT
At refinement iteration 2 (OVERLAPS) 355/414 variables, 14/73 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/414 variables, 355/428 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/414 variables, 0/428 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 5 (OVERLAPS) 11/425 variables, 1/429 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/425 variables, 11/440 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/425 variables, 0/440 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 8 (OVERLAPS) 2252/2677 variables, 425/865 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/2677 variables, 0/865 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 10 (OVERLAPS) 0/2677 variables, 0/865 constraints. Problems are: Problem set: 2 solved, 4 unsolved
No progress, stopping.
After SMT solving in domain Real declared 2677/2677 variables, and 865 constraints, problems are : Problem set: 2 solved, 4 unsolved in 2793 ms.
Refiners :[Domain max(s): 425/425 constraints, Positive P Invariants (semi-flows): 15/15 constraints, State Equation: 425/425 constraints, PredecessorRefiner: 6/0 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 2 solved, 4 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/40 variables, 40/40 constraints. Problems are: Problem set: 2 solved, 4 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/40 variables, 0/40 constraints. Problems are: Problem set: 2 solved, 4 unsolved
Problem AutonomousCar-PT-10b-ReachabilityFireability-2024-06 is UNSAT
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-06 TRUE TECHNIQUES SMT_REFINEMENT
Problem AutonomousCar-PT-10b-ReachabilityFireability-2024-09 is UNSAT
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-09 TRUE TECHNIQUES SMT_REFINEMENT
At refinement iteration 2 (OVERLAPS) 374/414 variables, 14/54 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/414 variables, 374/428 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/414 variables, 0/428 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 5 (OVERLAPS) 11/425 variables, 1/429 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/425 variables, 11/440 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/425 variables, 0/440 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 8 (OVERLAPS) 2252/2677 variables, 425/865 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/2677 variables, 0/865 constraints. Problems are: Problem set: 4 solved, 2 unsolved
At refinement iteration 10 (OVERLAPS) 0/2677 variables, 0/865 constraints. Problems are: Problem set: 4 solved, 2 unsolved
No progress, stopping.
After SMT solving in domain Int declared 2677/2677 variables, and 865 constraints, problems are : Problem set: 4 solved, 2 unsolved in 2250 ms.
Refiners :[Domain max(s): 425/425 constraints, Positive P Invariants (semi-flows): 15/15 constraints, State Equation: 425/425 constraints, PredecessorRefiner: 4/0 constraints, Known Traps: 0/0 constraints]
After SMT, in 5921ms problems are : Problem set: 4 solved, 2 unsolved
Parikh walk visited 0 properties in 1139 ms.
Support contains 15 out of 425 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 425/425 places, 2252/2252 transitions.
Graph (trivial) has 367 edges and 425 vertex of which 4 / 425 are part of one of the 2 SCC in 5 ms
Free SCC test removed 2 places
Drop transitions (Empty/Sink Transition effects.) removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Graph (complete) has 1994 edges and 423 vertex of which 416 are kept as prefixes of interest. Removing 7 places using SCC suffix rule.35 ms
Discarding 7 places :
Also discarding 5 output transitions
Drop transitions (Output transitions of discarded places.) removed 5 transitions
Drop transitions (Empty/Sink Transition effects.) removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 179 transitions
Trivial Post-agglo rules discarded 179 transitions
Performed 179 trivial Post agglomeration. Transition count delta: 179
Iterating post reduction 0 with 181 rules applied. Total rules applied 183 place count 416 transition count 2062
Reduce places removed 179 places and 0 transitions.
Ensure Unique test removed 24 transitions
Reduce isomorphic transitions removed 24 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 32 transitions
Trivial Post-agglo rules discarded 32 transitions
Performed 32 trivial Post agglomeration. Transition count delta: 32
Iterating post reduction 1 with 235 rules applied. Total rules applied 418 place count 237 transition count 2006
Reduce places removed 32 places and 0 transitions.
Iterating post reduction 2 with 32 rules applied. Total rules applied 450 place count 205 transition count 2006
Performed 14 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 14 Pre rules applied. Total rules applied 450 place count 205 transition count 1992
Deduced a syphon composed of 14 places in 3 ms
Reduce places removed 14 places and 0 transitions.
Iterating global reduction 3 with 28 rules applied. Total rules applied 478 place count 191 transition count 1992
Discarding 38 places :
Symmetric choice reduction at 3 with 38 rule applications. Total rules 516 place count 153 transition count 1954
Iterating global reduction 3 with 38 rules applied. Total rules applied 554 place count 153 transition count 1954
Ensure Unique test removed 401 transitions
Reduce isomorphic transitions removed 401 transitions.
Iterating post reduction 3 with 401 rules applied. Total rules applied 955 place count 153 transition count 1553
Discarding 10 places :
Symmetric choice reduction at 4 with 10 rule applications. Total rules 965 place count 143 transition count 1462
Iterating global reduction 4 with 10 rules applied. Total rules applied 975 place count 143 transition count 1462
Ensure Unique test removed 9 transitions
Reduce isomorphic transitions removed 9 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 9 transitions
Trivial Post-agglo rules discarded 9 transitions
Performed 9 trivial Post agglomeration. Transition count delta: 9
Iterating post reduction 4 with 18 rules applied. Total rules applied 993 place count 143 transition count 1444
Reduce places removed 9 places and 0 transitions.
Iterating post reduction 5 with 9 rules applied. Total rules applied 1002 place count 134 transition count 1444
Performed 39 Post agglomeration using F-continuation condition.Transition count delta: 39
Deduced a syphon composed of 39 places in 1 ms
Reduce places removed 39 places and 0 transitions.
Iterating global reduction 6 with 78 rules applied. Total rules applied 1080 place count 95 transition count 1405
Discarding 3 places :
Symmetric choice reduction at 6 with 3 rule applications. Total rules 1083 place count 92 transition count 1372
Iterating global reduction 6 with 3 rules applied. Total rules applied 1086 place count 92 transition count 1372
Free-agglomeration rule applied 18 times.
Iterating global reduction 6 with 18 rules applied. Total rules applied 1104 place count 92 transition count 1354
Reduce places removed 18 places and 0 transitions.
Iterating post reduction 6 with 18 rules applied. Total rules applied 1122 place count 74 transition count 1354
Partial Free-agglomeration rule applied 8 times.
Drop transitions (Partial Free agglomeration) removed 8 transitions
Iterating global reduction 7 with 8 rules applied. Total rules applied 1130 place count 74 transition count 1354
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 7 with 1 rules applied. Total rules applied 1131 place count 73 transition count 1353
Applied a total of 1131 rules in 875 ms. Remains 73 /425 variables (removed 352) and now considering 1353/2252 (removed 899) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 892 ms. Remains : 73/425 places, 1353/2252 transitions.
RANDOM walk for 40000 steps (190 resets) in 1189 ms. (33 steps per ms) remains 1/2 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 5027 steps (0 resets) in 20 ms. (239 steps per ms) remains 0/1 properties
FORMULA AutonomousCar-PT-10b-ReachabilityFireability-2024-02 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
All properties solved without resorting to model-checking.
Total runtime 12535 ms.
ITS solved all properties within timeout

BK_STOP 1716366586622

--------------------
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:
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202405141337.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -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="AutonomousCar-PT-10b"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="greatspnxred"
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 2-5568"
echo " Executing tool greatspnxred"
echo " Input is AutonomousCar-PT-10b, 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 r025-smll-171620166500375"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/AutonomousCar-PT-10b.tgz
mv AutonomousCar-PT-10b 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 ;