fond
Model Checking Contest 2022
12th edition, Bergen, Norway, June 21, 2022
Execution of r143-tall-165271830200084
Last Updated
Jun 22, 2022

About the Execution of 2021-gold for JoinFreeModules-PT-2000

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
16246.688 123508.00 130474.00 7450.30 TTTFFTTTFFTFFTFT normal

Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2022-input.r143-tall-165271830200084.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2022-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 2-4028
Executing tool gold2021
Input is JoinFreeModules-PT-2000, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r143-tall-165271830200084
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 6.7M
-rw-r--r-- 1 mcc users 9.2K Apr 30 02:24 CTLCardinality.txt
-rw-r--r-- 1 mcc users 102K Apr 30 02:24 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.6K Apr 30 02:21 CTLFireability.txt
-rw-r--r-- 1 mcc users 49K Apr 30 02:21 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:34 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.1K May 10 09:34 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.8K May 9 08:08 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K May 9 08:08 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K May 9 08:08 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 9 08:08 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Apr 30 02:28 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 144K Apr 30 02:28 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.4K Apr 30 02:26 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 47K Apr 30 02:26 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K May 9 08:08 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 9 08:08 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 10 09:34 equiv_col
-rw-r--r-- 1 mcc users 5 May 10 09:34 instance
-rw-r--r-- 1 mcc users 6 May 10 09:34 iscolored
-rw-r--r-- 1 mcc users 6.2M May 10 09:34 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 JoinFreeModules-PT-2000-ReachabilityFireability-00
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-01
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-02
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-03
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-04
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-05
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-06
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-07
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-08
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-09
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-10
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-11
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-12
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-13
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-14
FORMULA_NAME JoinFreeModules-PT-2000-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1655068800949

Running Version 0
[2022-06-12 21:20:02] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2022-06-12 21:20:02] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-06-12 21:20:03] [INFO ] Load time of PNML (sax parser for PT used): 672 ms
[2022-06-12 21:20:03] [INFO ] Transformed 10001 places.
[2022-06-12 21:20:03] [INFO ] Transformed 16001 transitions.
[2022-06-12 21:20:03] [INFO ] Parsed PT model containing 10001 places and 16001 transitions in 767 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 13 ms.
Working with output stream class java.io.PrintStream
[2022-06-12 21:20:03] [INFO ] Initial state test concluded for 11 properties.
Reduce places removed 1 places and 0 transitions.
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-00 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-06 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-09 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10010 steps, including 2 resets, run finished after 750 ms. (steps per millisecond=13 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 924 ms. (steps per millisecond=10 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 765 ms. (steps per millisecond=13 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 830 ms. (steps per millisecond=12 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 717 ms. (steps per millisecond=13 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 715 ms. (steps per millisecond=13 ) properties (out of 5) seen :0
Probabilistic random walk after 212196 steps, saw 212079 distinct states, run finished after 46617 ms. (steps per millisecond=4 ) properties seen :{}
Running SMT prover for 5 properties.
// Phase 1: matrix 16001 rows 10000 cols
[2022-06-12 21:20:56] [INFO ] Computed 2000 place invariants in 148 ms
[2022-06-12 21:20:59] [INFO ] [Real]Absence check using 2000 positive place invariants in 711 ms returned sat
[2022-06-12 21:21:00] [INFO ] SMT Verify possible in real domain returnedunsat :0 sat :0 real:5
[2022-06-12 21:21:03] [INFO ] [Nat]Absence check using 2000 positive place invariants in 637 ms returned sat
[2022-06-12 21:21:03] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 21:21:25] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
Fused 5 Parikh solutions to 1 different solutions.
Support contains 88 out of 10000 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 10000/10000 places, 16001/16001 transitions.
Graph (complete) has 24000 edges and 10000 vertex of which 435 are kept as prefixes of interest. Removing 9565 places using SCC suffix rule.25 ms
Discarding 9565 places :
Also discarding 15304 output transitions
Drop transitions removed 15304 transitions
Drop transitions removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 2 place count 435 transition count 696
Applied a total of 2 rules in 150 ms. Remains 435 /10000 variables (removed 9565) and now considering 696/16001 (removed 15305) transitions.
// Phase 1: matrix 696 rows 435 cols
[2022-06-12 21:21:25] [INFO ] Computed 87 place invariants in 2 ms
[2022-06-12 21:21:25] [INFO ] Dead Transitions using invariants and state equation in 335 ms returned []
Finished structural reductions, in 1 iterations. Remains : 435/10000 places, 696/16001 transitions.
[2022-06-12 21:21:26] [INFO ] Flatten gal took : 76 ms
[2022-06-12 21:21:26] [INFO ] Flatten gal took : 32 ms
[2022-06-12 21:21:26] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality1204704489356471951.gal : 21 ms
[2022-06-12 21:21:26] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality4590869941241455443.prop : 1 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality1204704489356471951.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality4590869941241455443.prop, --nowitness, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality1204704489356471951.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality4590869941241455443.prop --nowitness --gen-order FOLLOW
Loading property file /tmp/ReachabilityCardinality4590869941241455443.prop.
SDD proceeding with computation,5 properties remain. new max is 4
SDD size :1 after 8
SDD proceeding with computation,5 properties remain. new max is 8
SDD size :8 after 25
SDD proceeding with computation,5 properties remain. new max is 16
SDD size :25 after 76
SDD proceeding with computation,5 properties remain. new max is 32
SDD size :76 after 246
SDD proceeding with computation,5 properties remain. new max is 64
SDD size :246 after 851
SDD proceeding with computation,5 properties remain. new max is 128
SDD size :851 after 3104
SDD proceeding with computation,5 properties remain. new max is 256
SDD size :3104 after 11747
SDD proceeding with computation,5 properties remain. new max is 512
SDD size :11747 after 45500
Detected timeout of ITS tools.
[2022-06-12 21:21:41] [INFO ] Flatten gal took : 29 ms
[2022-06-12 21:21:41] [INFO ] Applying decomposition
[2022-06-12 21:21:41] [INFO ] Flatten gal took : 28 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/convert-linux64, -i, /tmp/graph5214063178975491141.txt, -o, /tmp/graph5214063178975491141.bin, -w, /tmp/graph5214063178975491141.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/louvain-linux64, /tmp/graph5214063178975491141.bin, -l, -1, -v, -w, /tmp/graph5214063178975491141.weights, -q, 0, -e, 0.001], workingDir=null]
[2022-06-12 21:21:41] [INFO ] Decomposing Gal with order
[2022-06-12 21:21:41] [INFO ] Rewriting arrays to variables to allow decomposition.
[2022-06-12 21:21:41] [INFO ] Flatten gal took : 30 ms
[2022-06-12 21:21:41] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 0 ms.
[2022-06-12 21:21:41] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality17176589383299743141.gal : 5 ms
[2022-06-12 21:21:41] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality13762729279500974677.prop : 1 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality17176589383299743141.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality13762729279500974677.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality17176589383299743141.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality13762729279500974677.prop --nowitness
Loading property file /tmp/ReachabilityCardinality13762729279500974677.prop.
SDD proceeding with computation,5 properties remain. new max is 4
SDD size :1 after 8
SDD proceeding with computation,5 properties remain. new max is 8
SDD size :8 after 25
SDD proceeding with computation,5 properties remain. new max is 16
SDD size :25 after 76
SDD proceeding with computation,5 properties remain. new max is 32
SDD size :76 after 246
SDD proceeding with computation,5 properties remain. new max is 64
SDD size :246 after 851
SDD proceeding with computation,5 properties remain. new max is 128
SDD size :851 after 3104
SDD proceeding with computation,5 properties remain. new max is 256
SDD size :3104 after 11747
SDD proceeding with computation,5 properties remain. new max is 512
SDD size :11747 after 45500
Detected timeout of ITS tools.
Built C files in :
/tmp/ltsmin4696751372783127496
[2022-06-12 21:21:56] [INFO ] Built C files in 20ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin4696751372783127496
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin4696751372783127496]
WARNING : LTS min runner thread failed on error :java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin4696751372783127496] killed by timeout after 1 SECONDS
java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin4696751372783127496] killed by timeout after 1 SECONDS
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:79)
at java.base/java.lang.Thread.run(Thread.java:834)
Incomplete random walk after 1000365 steps, including 2 resets, run finished after 3084 ms. (steps per millisecond=324 ) properties (out of 5) seen :4
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-13 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Finished Best-First random walk after 701 steps, including 0 resets, run visited all 1 properties in 4 ms. (steps per millisecond=175 )
FORMULA JoinFreeModules-PT-2000-ReachabilityFireability-07 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
All properties solved without resorting to model-checking.

BK_STOP 1655068924457

--------------------
content from stderr:

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination ReachabilityFireability -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="JoinFreeModules-PT-2000"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="gold2021"
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 2-4028"
echo " Executing tool gold2021"
echo " Input is JoinFreeModules-PT-2000, 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 r143-tall-165271830200084"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/JoinFreeModules-PT-2000.tgz
mv JoinFreeModules-PT-2000 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 ;