fond
Model Checking Contest 2018
8th edition, Bratislava, Slovakia, June 26, 2018
Execution of r213-smll-152732263800017
Last Updated
June 26, 2018

About the Execution of ITS-Tools.L for ClientsAndServers-PT-N0002P0

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15751.060 7172.00 12975.00 487.50 FFFTFFFFFFTFTTTF 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 180K
-rw-r--r-- 1 mcc users 3.4K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 19K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 21K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:49 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.2K May 15 18:49 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.6K May 26 09:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 12K May 26 09:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K May 26 09:26 LTLFireability.txt
-rw-r--r-- 1 mcc users 8.6K May 26 09:26 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.3K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 15K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 119 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 357 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 3.1K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 20K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 15 18:49 equiv_col
-rw-r--r-- 1 mcc users 8 May 15 18:49 instance
-rw-r--r-- 1 mcc users 6 May 15 18:49 iscolored
-rw-r--r-- 1 mcc users 9.1K May 15 18:49 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstoolsl
Input is ClientsAndServers-PT-N0002P0, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r213-smll-152732263800017
=====================================================================


--------------------
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 ClientsAndServers-PT-N0002P0-LTLCardinality-00
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-01
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-02
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-03
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-04
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-05
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-06
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-07
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-08
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-09
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-10
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-11
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-12
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-13
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-14
FORMULA_NAME ClientsAndServers-PT-N0002P0-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1527769907029

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_1.0.0.201805241334/bin/its-ltl-linux64, --gc-threshold, 2000000, -i, /home/mcc/execution/LTLCardinality.pnml.gal, -t, CGAL, -LTL, /home/mcc/execution/LTLCardinality.ltl, -c, -stutter-deadlock], workingDir=/home/mcc/execution]

its-ltl command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805241334/bin/its-ltl-linux64 --gc-threshold 2000000 -i /home/mcc/execution/LTLCardinality.pnml.gal -t CGAL -LTL /home/mcc/execution/LTLCardinality.ltl -c -stutter-deadlock
Read 16 LTL properties
Checking formula 0 : !((X((X("(Mi>=3)"))U("(MpG>=3)"))))
Formula 0 simplified : !X(X"(Mi>=3)" U "(MpG>=3)")
Presburger conditions satisfied. Using coverability to approximate state space in K-Induction.
// Phase 1: matrix 18 rows 25 cols
invariant :Uf + SF + CF + -1'CR + MtF + SG + MpG + -1'Si + -2'StR + -2'SwG + -1'SpG + -1'SwA + -1'SpA + Cb + CwG = 4
invariant :SA + SF + -1'MpG + -1'MwU + -1'Mi + -1'SwA = -6
invariant :CG + CR + StR + SwG + SpG + -1'CwG = 0
invariant :CwA + Cb + CwG + Ci = 16
invariant :StF + Si + StR + SwG + SpG + SwA + SpA = 4
invariant :SR + SG + MpG + MwU + -1'SwG = 0
invariant :CA + CF + -1'Si + -1'StR + -1'SwG + -1'SpG + Cb + CwG + Ci = 12
invariant :MpA + MtF + MpG + MwU + Mi = 6
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]
Compilation finished in 673 ms.
Running link step : CommandLine [args=[gcc, -shared, -o, gal.so, model.o], workingDir=/home/mcc/execution]
Link finished in 36 ms.
Reverse transition relation is NOT exact ! Due to transitions ssA, Intersection with reachable at each step enabled. (destroyed/reverse/intersect/total) :0/17/1/18
Computing Next relation with stutter on 1 deadlock states
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X((X((LTLAP0==true)))U((LTLAP1==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 44 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-00 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, []([](((LTLAP2==true))U((LTLAP3==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 32 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-01 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP4==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 13 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-02 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP5==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 12 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-03 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP6==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 13 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-04 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, ((LTLAP7==true))U([](<>((LTLAP8==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 18 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-05 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, <>([](<>((LTLAP9==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 23 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-06 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, []([]((LTLAP10==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 15 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-07 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, ((LTLAP11==true))U([](X((LTLAP12==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 17 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-08 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, []([](X([]((LTLAP13==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 21 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-09 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, (<>((LTLAP14==true)))U(X(<>((LTLAP15==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 13 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-10 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X(<>(X([]((LTLAP16==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 12 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-11 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, <>(<>(((LTLAP17==true))U((LTLAP18==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 13 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-12 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, <>(<>(<>((LTLAP19==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 13 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-13 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, ([](X((LTLAP20==true))))U(((LTLAP21==true))U((LTLAP22==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 14 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-14 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X((<>((LTLAP23==true)))U((LTLAP24==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 21 ms.
FORMULA ClientsAndServers-PT-N0002P0-LTLCardinality-15 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
ITS tools runner thread asked to quit. Dying gracefully.

BK_STOP 1527769914201

--------------------
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 LTLCardinality -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -louvain -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 LTLCardinality -z3path /home/mcc/BenchKit//z3/bin/z3 -yices2path /home/mcc/BenchKit//yices/bin/yices -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -louvain -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 31, 2018 12:31:49 PM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -its, -ltsminpath, /home/mcc/BenchKit//lts_install_dir/, -louvain, -smt]
May 31, 2018 12:31:49 PM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
May 31, 2018 12:31:49 PM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 29 ms
May 31, 2018 12:31:49 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 25 places.
May 31, 2018 12:31:49 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 18 transitions.
May 31, 2018 12:31:49 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 6 ms
May 31, 2018 12:31:49 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 35 ms
May 31, 2018 12:31:49 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/LTLCardinality.pnml.gal : 3 ms
May 31, 2018 12:31:49 PM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSLTLTools
INFO: Time to serialize properties into /home/mcc/execution/LTLCardinality.ltl : 2 ms
May 31, 2018 12:31:50 PM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 18 transitions.
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver computeAndDeclareInvariants
INFO: Computed 8 place invariants in 12 ms
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver init
INFO: Proved 25 variables to be positive in 94 ms
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may disable matrix : 18 transitions.
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of disable matrix completed :0/18 took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete disable matrix. took 1 ms. Total solver calls (SAT/UNSAT): 0(0/0)
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may enable matrix : 18 transitions.
May 31, 2018 12:31:50 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete enable matrix. took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
May 31, 2018 12:31:51 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeCoEnablingMatrix
INFO: Computing symmetric co enabling matrix : 18 transitions.
May 31, 2018 12:31:51 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Finished co-enabling matrix. took 401 ms. Total solver calls (SAT/UNSAT): 111(111/0)
May 31, 2018 12:31:51 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeDoNotAccord
INFO: Computing Do-Not-Accords matrix : 18 transitions.
May 31, 2018 12:31:51 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Completed DNA matrix. took 188 ms. Total solver calls (SAT/UNSAT): 33(0/33)
May 31, 2018 12:31:51 PM fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext transform
INFO: Built C files in 1667ms conformant to PINS in folder :/home/mcc/execution

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="ClientsAndServers-PT-N0002P0"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="itstoolsl"
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/ClientsAndServers-PT-N0002P0.tgz
mv ClientsAndServers-PT-N0002P0 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 itstoolsl"
echo " Input is ClientsAndServers-PT-N0002P0, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r213-smll-152732263800017"
echo "====================================================================="
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '' LTLCardinality.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 ;