fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r361-smll-167891811000191
Last Updated
May 14, 2023

About the Execution of LTSMin+red for RwMutex-PT-r1000w0010

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
414.140 3588674.00 14293384.00 327.60 FTFTTFFTFFFTTFFT 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.r361-smll-167891811000191.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 RwMutex-PT-r1000w0010, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r361-smll-167891811000191
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 2.7M
-rw-r--r-- 1 mcc users 6.2K Feb 25 22:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 64K Feb 25 22:58 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.6K Feb 25 22:53 CTLFireability.txt
-rw-r--r-- 1 mcc users 39K Feb 25 22:53 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.8K Feb 25 16:49 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Feb 25 16:49 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Feb 25 16:49 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Feb 25 16:49 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Feb 25 23:09 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 147K Feb 25 23:09 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 12K Feb 25 23:03 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 101K Feb 25 23:03 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Feb 25 16:49 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 16:49 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 2.2M 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 RwMutex-PT-r1000w0010-ReachabilityFireability-00
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-01
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-02
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-03
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-04
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-05
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-06
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-07
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-08
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-09
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-10
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-11
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-12
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-13
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-14
FORMULA_NAME RwMutex-PT-r1000w0010-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1679078174304

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=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=RwMutex-PT-r1000w0010
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-17 18:36:16] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2023-03-17 18:36:16] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-17 18:36:17] [INFO ] Load time of PNML (sax parser for PT used): 420 ms
[2023-03-17 18:36:17] [INFO ] Transformed 3020 places.
[2023-03-17 18:36:17] [INFO ] Transformed 2020 transitions.
[2023-03-17 18:36:17] [INFO ] Found NUPN structural information;
[2023-03-17 18:36:17] [INFO ] Parsed PT model containing 3020 places and 2020 transitions and 26040 arcs in 590 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 19 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 4 formulas.
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 2 resets, run finished after 2453 ms. (steps per millisecond=4 ) properties (out of 12) seen :7
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-10 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-06 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-02 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 426 ms. (steps per millisecond=23 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 406 ms. (steps per millisecond=24 ) properties (out of 5) seen :1
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-04 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 385 ms. (steps per millisecond=25 ) properties (out of 4) seen :1
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-05 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 385 ms. (steps per millisecond=25 ) properties (out of 3) seen :1
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-07 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 410 ms. (steps per millisecond=24 ) properties (out of 2) seen :0
Running SMT prover for 2 properties.
// Phase 1: matrix 2020 rows 3020 cols
[2023-03-17 18:36:21] [INFO ] Computed 2010 place invariants in 72 ms
[2023-03-17 18:36:23] [INFO ] After 1288ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-17 18:36:25] [INFO ] [Nat]Absence check using 2010 positive place invariants in 952 ms returned sat
[2023-03-17 18:36:28] [INFO ] After 2817ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :2
[2023-03-17 18:36:29] [INFO ] After 3819ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :2
Attempting to minimize the solution found.
Minimization took 674 ms.
[2023-03-17 18:36:30] [INFO ] After 6910ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :2
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-00 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Finished Parikh walk after 951 steps, including 0 resets, run visited all 1 properties in 149 ms. (steps per millisecond=6 )
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-09 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Parikh walk visited 2 properties in 522 ms.
All properties solved without resorting to model-checking.
Total runtime 14161 ms.
pnml2lts-sym model.pnml --lace-workers=4 --vset=lddmc --saturation=sat -rbs,w2W,ru,hf --sylvan-sizes=20,28,20,28 --inv-bin-par --invariant=/tmp/457/inv_0_ --invariant=/tmp/457/inv_1_ --invariant=/tmp/457/inv_2_ --invariant=/tmp/457/inv_3_ --invariant=/tmp/457/inv_4_ --invariant=/tmp/457/inv_5_ --invariant=/tmp/457/inv_6_ --invariant=/tmp/457/inv_7_ --invariant=/tmp/457/inv_8_ --invariant=/tmp/457/inv_9_ --invariant=/tmp/457/inv_10_ --invariant=/tmp/457/inv_11_ --invariant=/tmp/457/inv_12_ --invariant=/tmp/457/inv_13_ --invariant=/tmp/457/inv_14_ --invariant=/tmp/457/inv_15_ --inv-par
TIME LIMIT: Killed by timeout after 3570 seconds
MemTotal: 16393216 kB
MemFree: 15962132 kB
After kill :
MemTotal: 16393216 kB
MemFree: 16095928 kB
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-00
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-01
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-02
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-03
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-04
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-05
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-06
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-07
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-08
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-09
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-10
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-11 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
Could not compute solution for formula : RwMutex-PT-r1000w0010-ReachabilityFireability-12
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-13 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-14 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA RwMutex-PT-r1000w0010-ReachabilityFireability-15 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN

BK_STOP 1679081762978

--------------------
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 ReachabilityFireability -timeout 360 -rebuildPNML
mcc2023
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-00
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_0_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-01
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_1_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-02
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_2_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-03
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_3_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-04
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_4_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-05
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_5_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-06
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_6_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-07
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_7_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-08
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_8_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-09
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_9_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-10
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_10_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-11
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_11_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-12
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_12_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-13
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_13_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-14
rfs formula type AG
rfs formula formula --invariant=/tmp/457/inv_14_
rfs formula name RwMutex-PT-r1000w0010-ReachabilityFireability-15
rfs formula type EF
rfs formula formula --invariant=/tmp/457/inv_15_
pnml2lts-sym: Exploration order is bfs-prev
pnml2lts-sym: Saturation strategy is sat
pnml2lts-sym: Guided search strategy is unguided
pnml2lts-sym: Attractor strategy is default
pnml2lts-sym: opening model.pnml
pnml2lts-sym: Edge label is id
Warning: program compiled against libxml 210 using older 209
pnml2lts-sym: Petri net has 3020 places, 2020 transitions and 26040 arcs
pnml2lts-sym: Petri net RwMutex-PT-r1000w0010 analyzed
pnml2lts-sym: There are safe places
pnml2lts-sym: Loading Petri net took 0.090 real 0.050 user 0.030 sys
pnml2lts-sym: Initializing regrouping layer
pnml2lts-sym: Regroup specification: bs,w2W,ru,hf
pnml2lts-sym: Regroup Boost's Sloan
pnml2lts-sym: Regroup over-approximate must-write to may-write
pnml2lts-sym: Regroup Row sUbsume
pnml2lts-sym: Reqroup Horizontal Flip
pnml2lts-sym: Regrouping: 2020->2020 groups
pnml2lts-sym: Regrouping took 4.270 real 4.250 user 0.000 sys
pnml2lts-sym: state vector length is 3020; there are 2020 groups
pnml2lts-sym: Creating a multi-core ListDD domain.
pnml2lts-sym: Sylvan allocates 15.000 GB virtual memory for nodes table and operation cache.
pnml2lts-sym: Initial nodes table and operation cache requires 60.00 MB.
pnml2lts-sym: Using GBgetTransitionsShortR2W as next-state function
pnml2lts-sym: got initial state
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/457/inv_15_) found at depth 0!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/457/inv_14_) found at depth 0!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/457/inv_13_) found at depth 0!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/457/inv_11_) found at depth 0!
pnml2lts-sym:
Killing (15) : 463
Killing (9) : 463

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="RwMutex-PT-r1000w0010"
export BK_EXAMINATION="ReachabilityFireability"
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 RwMutex-PT-r1000w0010, 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 r361-smll-167891811000191"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/RwMutex-PT-r1000w0010.tgz
mv RwMutex-PT-r1000w0010 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 ;