About the Execution of LTSMin+red for PhilosophersDyn-PT-10
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 1058.735 | 3600000.00 | 14219278.00 | 11372.30 | TTTTFFF?FTFT?TFF | 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.r297-tall-167873950300326.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 ltsminxred
Input is PhilosophersDyn-PT-10, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r297-tall-167873950300326
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 13M
-rw-r--r-- 1 mcc users 39K Feb 26 12:25 CTLCardinality.txt
-rw-r--r-- 1 mcc users 195K Feb 26 12:25 CTLCardinality.xml
-rw-r--r-- 1 mcc users 288K Feb 26 12:23 CTLFireability.txt
-rw-r--r-- 1 mcc users 1.5M Feb 26 12:23 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 11K Feb 25 16:33 LTLCardinality.txt
-rw-r--r-- 1 mcc users 47K Feb 25 16:33 LTLCardinality.xml
-rw-r--r-- 1 mcc users 138K Feb 25 16:34 LTLFireability.txt
-rw-r--r-- 1 mcc users 537K Feb 25 16:34 LTLFireability.xml
-rw-r--r-- 1 mcc users 89K Feb 26 12:55 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 443K Feb 26 12:55 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 1.3M Feb 26 12:52 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 6.5M Feb 26 12:52 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 6.3K Feb 25 16:34 UpperBounds.txt
-rw-r--r-- 1 mcc users 14K Feb 25 16:34 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 1.8M 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 PhilosophersDyn-PT-10-ReachabilityCardinality-00
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-01
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-02
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-03
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-04
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-05
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-06
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-07
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-08
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-09
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-10
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-11
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-12
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-13
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-14
FORMULA_NAME PhilosophersDyn-PT-10-ReachabilityCardinality-15
=== Now, execution of the tool begins
BK_START 1679494551682
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=ltsminxred
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=PhilosophersDyn-PT-10
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-22 14:15:53] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -timeout, 360, -rebuildPNML]
[2023-03-22 14:15:53] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-22 14:15:53] [INFO ] Load time of PNML (sax parser for PT used): 158 ms
[2023-03-22 14:15:53] [INFO ] Transformed 170 places.
[2023-03-22 14:15:53] [INFO ] Transformed 2310 transitions.
[2023-03-22 14:15:53] [INFO ] Parsed PT model containing 170 places and 2310 transitions and 18190 arcs in 264 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 32 ms.
Working with output stream class java.io.PrintStream
Ensure Unique test removed 45 transitions
Reduce redundant transitions removed 45 transitions.
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-03 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 1184 resets, run finished after 734 ms. (steps per millisecond=13 ) properties (out of 15) seen :2
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-15 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-10 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 91 resets, run finished after 85 ms. (steps per millisecond=117 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 97 resets, run finished after 221 ms. (steps per millisecond=45 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 68 resets, run finished after 42 ms. (steps per millisecond=238 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 91 resets, run finished after 141 ms. (steps per millisecond=70 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 68 resets, run finished after 118 ms. (steps per millisecond=84 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 138 resets, run finished after 72 ms. (steps per millisecond=138 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 138 resets, run finished after 125 ms. (steps per millisecond=80 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 97 resets, run finished after 47 ms. (steps per millisecond=212 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 91 resets, run finished after 42 ms. (steps per millisecond=238 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 77 resets, run finished after 64 ms. (steps per millisecond=156 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 88 resets, run finished after 57 ms. (steps per millisecond=175 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 81 resets, run finished after 109 ms. (steps per millisecond=91 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 99 resets, run finished after 65 ms. (steps per millisecond=153 ) properties (out of 13) seen :0
Running SMT prover for 13 properties.
[2023-03-22 14:16:06] [INFO ] Flow matrix only has 1905 transitions (discarded 360 similar events)
// Phase 1: matrix 1905 rows 170 cols
[2023-03-22 14:16:06] [INFO ] Computed 39 place invariants in 66 ms
[2023-03-22 14:16:07] [INFO ] [Real]Absence check using 27 positive place invariants in 6 ms returned sat
[2023-03-22 14:16:07] [INFO ] [Real]Absence check using 27 positive and 12 generalized place invariants in 8 ms returned sat
[2023-03-22 14:16:07] [INFO ] After 330ms SMT Verify possible using all constraints in real domain returned unsat :3 sat :0 real:10
[2023-03-22 14:16:07] [INFO ] [Nat]Absence check using 27 positive place invariants in 5 ms returned sat
[2023-03-22 14:16:07] [INFO ] [Nat]Absence check using 27 positive and 12 generalized place invariants in 6 ms returned sat
[2023-03-22 14:16:08] [INFO ] After 707ms SMT Verify possible using state equation in natural domain returned unsat :11 sat :2
[2023-03-22 14:16:08] [INFO ] State equation strengthened by 1030 read => feed constraints.
[2023-03-22 14:16:09] [INFO ] After 855ms SMT Verify possible using 1030 Read/Feed constraints in natural domain returned unsat :11 sat :2
[2023-03-22 14:16:09] [INFO ] After 1346ms SMT Verify possible using trap constraints in natural domain returned unsat :11 sat :2
Attempting to minimize the solution found.
Minimization took 361 ms.
[2023-03-22 14:16:10] [INFO ] After 2658ms SMT Verify possible using all constraints in natural domain returned unsat :11 sat :2
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-14 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-13 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-11 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-09 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-08 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-06 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-05 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-04 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-02 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-01 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PhilosophersDyn-PT-10-ReachabilityCardinality-00 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 13 Parikh solutions to 2 different solutions.
Parikh walk visited 0 properties in 6 ms.
Support contains 162 out of 170 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 170/170 places, 2265/2265 transitions.
Applied a total of 0 rules in 255 ms. Remains 170 /170 variables (removed 0) and now considering 2265/2265 (removed 0) transitions.
[2023-03-22 14:16:10] [INFO ] Flow matrix only has 1905 transitions (discarded 360 similar events)
[2023-03-22 14:16:10] [INFO ] Invariant cache hit.
[2023-03-22 14:16:11] [INFO ] Dead Transitions using invariants and state equation in 980 ms found 380 transitions.
Found 380 dead transitions using SMT.
Drop transitions removed 380 transitions
Dead transitions reduction (with SMT) triggered by suspicious arc values removed 380 transitions.
Starting structural reductions in REACHABILITY mode, iteration 1 : 170/170 places, 1885/2265 transitions.
Applied a total of 0 rules in 140 ms. Remains 170 /170 variables (removed 0) and now considering 1885/1885 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1384 ms. Remains : 170/170 places, 1885/2265 transitions.
Incomplete random walk after 10000 steps, including 1198 resets, run finished after 229 ms. (steps per millisecond=43 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 138 resets, run finished after 113 ms. (steps per millisecond=88 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 87 resets, run finished after 28 ms. (steps per millisecond=357 ) properties (out of 2) seen :0
Interrupted probabilistic random walk after 163308 steps, run timeout after 3001 ms. (steps per millisecond=54 ) properties seen :{}
Probabilistic random walk after 163308 steps, saw 42274 distinct states, run finished after 3002 ms. (steps per millisecond=54 ) properties seen :0
Running SMT prover for 2 properties.
// Phase 1: matrix 1885 rows 170 cols
[2023-03-22 14:16:15] [INFO ] Computed 39 place invariants in 50 ms
[2023-03-22 14:16:15] [INFO ] After 50ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-22 14:16:15] [INFO ] [Nat]Absence check using 12 positive place invariants in 2 ms returned sat
[2023-03-22 14:16:15] [INFO ] [Nat]Absence check using 12 positive and 27 generalized place invariants in 9 ms returned sat
[2023-03-22 14:16:15] [INFO ] After 659ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :2
[2023-03-22 14:16:15] [INFO ] State equation strengthened by 1010 read => feed constraints.
[2023-03-22 14:16:24] [INFO ] After 8866ms SMT Verify possible using 1010 Read/Feed constraints in natural domain returned unsat :0 sat :2
[2023-03-22 14:16:33] [INFO ] After 17985ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :2
Attempting to minimize the solution found.
Minimization took 3043 ms.
[2023-03-22 14:16:36] [INFO ] After 21771ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :2
Parikh walk visited 0 properties in 7 ms.
Support contains 162 out of 170 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 170/170 places, 1885/1885 transitions.
Applied a total of 0 rules in 95 ms. Remains 170 /170 variables (removed 0) and now considering 1885/1885 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 97 ms. Remains : 170/170 places, 1885/1885 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 170/170 places, 1885/1885 transitions.
Applied a total of 0 rules in 96 ms. Remains 170 /170 variables (removed 0) and now considering 1885/1885 (removed 0) transitions.
[2023-03-22 14:16:37] [INFO ] Invariant cache hit.
[2023-03-22 14:16:37] [INFO ] Implicit Places using invariants in 104 ms returned []
[2023-03-22 14:16:37] [INFO ] Invariant cache hit.
[2023-03-22 14:16:37] [INFO ] State equation strengthened by 1010 read => feed constraints.
[2023-03-22 14:16:38] [INFO ] Implicit Places using invariants and state equation in 898 ms returned []
Implicit Place search using SMT with State Equation took 1009 ms to find 0 implicit places.
[2023-03-22 14:16:38] [INFO ] Redundant transitions in 129 ms returned []
[2023-03-22 14:16:38] [INFO ] Invariant cache hit.
[2023-03-22 14:16:39] [INFO ] Dead Transitions using invariants and state equation in 761 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 2008 ms. Remains : 170/170 places, 1885/1885 transitions.
Applied a total of 0 rules in 40 ms. Remains 170 /170 variables (removed 0) and now considering 1885/1885 (removed 0) transitions.
Running SMT prover for 2 properties.
[2023-03-22 14:16:39] [INFO ] Invariant cache hit.
[2023-03-22 14:16:39] [INFO ] After 46ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-22 14:16:39] [INFO ] [Nat]Absence check using 12 positive place invariants in 2 ms returned sat
[2023-03-22 14:16:39] [INFO ] [Nat]Absence check using 12 positive and 27 generalized place invariants in 9 ms returned sat
[2023-03-22 14:16:39] [INFO ] After 658ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :2
[2023-03-22 14:16:40] [INFO ] After 941ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :2
Attempting to minimize the solution found.
Minimization took 218 ms.
[2023-03-22 14:16:40] [INFO ] After 1229ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :2
[2023-03-22 14:16:40] [INFO ] Export to MCC of 2 properties in file /home/mcc/execution/ReachabilityCardinality.sr.xml took 3 ms.
[2023-03-22 14:16:40] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 170 places, 1885 transitions and 14300 arcs took 20 ms.
[2023-03-22 14:16:40] [INFO ] Flatten gal took : 239 ms
Total runtime 47535 ms.
There are residual formulas that ITS could not solve within timeout
pnml2lts-sym model.pnml --lace-workers=4 --vset=lddmc --saturation=sat -rbs,w2W,ru,hf --sylvan-sizes=20,28,20,28 --invariant=/tmp/506/inv_0_ --invariant=/tmp/506/inv_1_ --inv-par
TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16393216 kB
MemFree: 15769228 kB
After kill :
MemTotal: 16393216 kB
MemFree: 16084088 kB
BK_TIME_CONFINEMENT_REACHED
--------------------
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//
++ perl -pe 's/.*\.//g'
++ 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 ReachabilityCardinality -timeout 360 -rebuildPNML
mcc2023
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="PhilosophersDyn-PT-10"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="ltsminxred"
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 ltsminxred"
echo " Input is PhilosophersDyn-PT-10, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r297-tall-167873950300326"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/PhilosophersDyn-PT-10.tgz
mv PhilosophersDyn-PT-10 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "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 [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "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 "ReachabilityCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityCardinality.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 [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
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 ;