fond
Model Checking Contest 2018
8th edition, Bratislava, Slovakia, June 26, 2018
Execution of r080-blw3-152649947400042
Last Updated
June 26, 2018

About the Execution of ITS-Tools for DatabaseWithMutex-PT-02

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15755.710 2855.00 4421.00 106.40 FTFFFTFFTFFFFTTF normal

Execution Chart

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

Trace from the execution

Waiting for the VM to be ready (probing ssh)
.................
/home/mcc/execution
total 224K
-rw-r--r-- 1 mcc users 4.4K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 18K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.2K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 20K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:50 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.3K May 15 18:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 12K May 15 18:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.0K May 15 18:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 13K May 15 18:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 5.4K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 22K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 114 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 352 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 18K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.2K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.6K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 15 18:50 equiv_col
-rw-r--r-- 1 mcc users 3 May 15 18:50 instance
-rw-r--r-- 1 mcc users 6 May 15 18:50 iscolored
-rw-r--r-- 1 mcc users 29K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstools
Input is DatabaseWithMutex-PT-02, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r080-blw3-152649947400042
=====================================================================


--------------------
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 DatabaseWithMutex-PT-02-ReachabilityFireability-00
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-01
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-02
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-03
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-04
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-05
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-06
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-07
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-08
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-09
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-10
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-11
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-12
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-13
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-14
FORMULA_NAME DatabaseWithMutex-PT-02-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1527102228937

FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-15 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-14 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-01 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-00 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Using solver Z3 to compute partial order matrices.
Built C files in :
/home/mcc/execution
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805151631/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/ReachabilityFireability.pnml.gal, -t, CGAL, -reachable-file, ReachabilityFireability.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805151631/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/ReachabilityFireability.pnml.gal -t CGAL -reachable-file ReachabilityFireability.prop --nowitness
Loading property file ReachabilityFireability.prop.
Read [invariant] property : DatabaseWithMutex-PT-02-ReachabilityFireability-07 with value :(!(((((MesBuffReply_2_2>=1)||(MesBuffReply_1_2>=1))||(MesBuffReply_2_1>=1))||(MesBuffReply_1_1>=1))||(((((WaitMutex_2_1>=1)&&(Mutex_1>=1))||((WaitMutex_1_1>=1)&&(Mutex_1>=1)))||((Mutex_2>=1)&&(WaitMutex_2_2>=1)))||((Mutex_2>=1)&&(WaitMutex_1_2>=1)))))
Read [reachable] property : DatabaseWithMutex-PT-02-ReachabilityFireability-08 with value :((WaitMutex_1_1>=1)&&(Mutex_1>=1))
Read [reachable] property : DatabaseWithMutex-PT-02-ReachabilityFireability-09 with value :((((Mutex_2>=1)&&(WaitMutex_2_2>=1))&&((((WaitMutex_2_1>=1)&&(Mutex_1>=1))||(all_active_2>=1))&&(Modify_1_1>=1)))&&(!(((Message_2_1>=1)&&(MesBuffReply_2_2>=1))||(Message_2_2>=1))))
Read [reachable] property : DatabaseWithMutex-PT-02-ReachabilityFireability-13 with value :((((Active_2_1>=1)&&(Acknowledge_1_1>=1))||(((updating_2_1>=1)&&(Message_1_1>=1))||((Modify_2_2>=1)||((Active_1_2>=1)&&(Acknowledge_2_2>=1)))))&&((!((Message_1_2>=1)||(all_active_2>=1)))||(((Modify_1_1>=1)||(updating_2_1>=1))&&(!(updating_1_2>=1)))))
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
DatabaseWithMutex\_PT\_02\_flat\_flat,153,0.019491,3952,2,254,5,916,6,0,187,609,0
Total reachable state count : 153

Verifying 4 reachability properties.
Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-07 does not hold.
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-07 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
DatabaseWithMutex-PT-02-ReachabilityFireability-07,9,0.020313,3980,2,87,6,916,7,0,196,609,0
Reachability property DatabaseWithMutex-PT-02-ReachabilityFireability-08 is true.
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-08 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
DatabaseWithMutex-PT-02-ReachabilityFireability-08,1,0.020614,4176,2,39,7,916,8,0,198,609,0
Reachability property DatabaseWithMutex-PT-02-ReachabilityFireability-09 does not hold.
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-09 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : DatabaseWithMutex-PT-02-ReachabilityFireability-09

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
DatabaseWithMutex-PT-02-ReachabilityFireability-09,0,0.021412,4344,1,0,7,916,9,0,213,609,0
Reachability property DatabaseWithMutex-PT-02-ReachabilityFireability-13 is true.
FORMULA DatabaseWithMutex-PT-02-ReachabilityFireability-13 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
DatabaseWithMutex-PT-02-ReachabilityFireability-13,7,0.022267,4344,2,60,8,916,10,0,231,609,0
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit//lts_install_dir//include, -I., -std=c99, -fPIC, -O3, model.c], workingDir=/home/mcc/execution]
WARNING : LTS min runner thread was asked to interrupt. Dying gracefully.

BK_STOP 1527102231792

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

+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution ReachabilityFireability -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -smt
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ /home/mcc/BenchKit//itstools/its-tools -consoleLog -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination ReachabilityFireability -z3path /home/mcc/BenchKit//z3/bin/z3 -yices2path /home/mcc/BenchKit//yices/bin/yices -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -smt -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss8m -Xms40m -Xmx8192m -Dfile.encoding=UTF-8 -Dosgi.requiredJavaVersion=1.6
May 23, 2018 7:03:50 PM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -its, -ltsminpath, /home/mcc/BenchKit//lts_install_dir/, -smt]
May 23, 2018 7:03:50 PM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
May 23, 2018 7:03:50 PM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 33 ms
May 23, 2018 7:03:50 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 38 places.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 32 transitions.
May 23, 2018 7:03:50 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 6 ms
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-00 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Reachable property DatabaseWithMutex-PT-02-ReachabilityFireability-01 is trivially true : it is verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-02 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-03 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-04 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Reachable property DatabaseWithMutex-PT-02-ReachabilityFireability-05 is trivially true : it is verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-06 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-10 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-11 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-12 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Reachable property DatabaseWithMutex-PT-02-ReachabilityFireability-14 is trivially true : it is verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.PropertySimplifier rewriteWithInitialState
INFO: Invariant property DatabaseWithMutex-PT-02-ReachabilityFireability-15 is trivially false : it is not verified in initial state.
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 30 ms
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 9 ms
May 23, 2018 7:03:50 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/ReachabilityFireability.pnml.gal : 2 ms
May 23, 2018 7:03:50 PM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSTools
INFO: Time to serialize properties into /home/mcc/execution/ReachabilityFireability.prop : 1 ms
May 23, 2018 7:03:50 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 8 ms
May 23, 2018 7:03:51 PM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 32 transitions.
May 23, 2018 7:03:51 PM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 32 transitions.
May 23, 2018 7:03:51 PM org.smtlib.impl.Script execute
WARNING: Script execution failed on command (declare-fun s () (Array Int (Array Int Int))) with error (error "Error writing to Z3 solver: java.io.IOException: Stream closed")
Skipping mayMatrices nes/nds Error when declaring system variables to SMT solver.(error "Error writing to Z3 solver: java.io.IOException: Stream closed")
java.lang.RuntimeException: Error when declaring system variables to SMT solver.(error "Error writing to Z3 solver: java.io.IOException: Stream closed")
at fr.lip6.move.gal.gal2smt.bmc.NextBMCSolver.init(NextBMCSolver.java:93)
at fr.lip6.move.gal.gal2smt.bmc.KInductionSolver.init(KInductionSolver.java:59)
at fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver.init(NecessaryEnablingsolver.java:71)
at fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext.printLabels(Gal2PinsTransformerNext.java:471)
at fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext.printDependencyMatrix(Gal2PinsTransformerNext.java:209)
at fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext.buildBodyFile(Gal2PinsTransformerNext.java:85)
at fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext.transform(Gal2PinsTransformerNext.java:830)
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:71)
at java.lang.Thread.run(Thread.java:748)
May 23, 2018 7:03:51 PM fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext transform
INFO: Built C files in 107ms conformant to PINS in folder :/home/mcc/execution
May 23, 2018 7:03:51 PM fr.lip6.move.gal.gal2smt.Gal2SMTFrontEnd checkProperties
INFO: Ran tautology test, simplified 0 / 0 in 286 ms.
May 23, 2018 7:03:51 PM fr.lip6.move.gal.gal2smt.Gal2SMTFrontEnd checkProperties
WARNING: Interrupting SMT solver.
May 23, 2018 7:03:51 PM fr.lip6.move.gal.application.SMTRunner$2 run
INFO: SMT solved 0/ 4 properties. Interrupting other analysis methods.

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="DatabaseWithMutex-PT-02"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"

# 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

tar xzf /home/mcc/BenchKit/INPUTS/DatabaseWithMutex-PT-02.tgz
mv DatabaseWithMutex-PT-02 execution
cd execution
pwd
ls -lh

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-3637"
echo " Executing tool itstools"
echo " Input is DatabaseWithMutex-PT-02, 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 r080-blw3-152649947400042"
echo "====================================================================="
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
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 ;