fond
Model Checking Contest 2019
9th edition, Prague, Czech Republic, April 7, 2019 (TOOLympics)
Execution of r151-ebro-155286406400196
Last Updated
Apr 15, 2019

About the Execution of ITS-Tools for RobotManipulation-PT-00050

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
419.620 8485.00 20068.00 189.20 FFFFFFFTFFFFFFFF normal

Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2019-input.r151-ebro-155286406400196.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2019-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.....................
=====================================================================
Generated by BenchKit 2-3954
Executing tool itstools
Input is RobotManipulation-PT-00050, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r151-ebro-155286406400196
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 196K
-rw-r--r-- 1 mcc users 4.3K Feb 12 14:34 CTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 12 14:34 CTLCardinality.xml
-rw-r--r-- 1 mcc users 3.2K Feb 8 16:30 CTLFireability.txt
-rw-r--r-- 1 mcc users 21K Feb 8 16:30 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 10 17:31 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.2K Mar 10 17:31 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 113 Feb 24 15:05 GlobalProperties.txt
-rw-r--r-- 1 mcc users 351 Feb 24 15:05 GlobalProperties.xml
-rw-r--r-- 1 mcc users 2.7K Feb 5 01:15 LTLCardinality.txt
-rw-r--r-- 1 mcc users 12K Feb 5 01:15 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Feb 4 22:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 9.9K Feb 4 22:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Feb 4 16:40 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 22K Feb 4 16:40 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.0K Feb 1 13:03 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 16K Feb 1 13:03 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Feb 4 22:30 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 4 22:30 UpperBounds.xml

-rw-r--r-- 1 mcc users 6 Jan 29 09:35 equiv_col
-rw-r--r-- 1 mcc users 6 Jan 29 09:35 instance
-rw-r--r-- 1 mcc users 6 Jan 29 09:35 iscolored
-rw-r--r-- 1 mcc users 6.3K Mar 10 17:31 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 RobotManipulation-PT-00050-LTLFireability-00
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-01
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-02
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-03
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-04
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-05
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-06
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-07
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-08
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-09
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-10
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-11
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-12
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-13
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-14
FORMULA_NAME RobotManipulation-PT-00050-LTLFireability-15

=== Now, execution of the tool begins

BK_START 1553112579187

Working with output stream class java.io.PrintStream
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_1.0.0.201903111103/bin/its-ltl-linux64, --gc-threshold, 2000000, -i, /home/mcc/execution/LTLFireability.pnml.gal, -t, CGAL, -LTL, /home/mcc/execution/LTLFireability.ltl, -c, -stutter-deadlock], workingDir=/home/mcc/execution]

its-ltl command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201903111103/bin/its-ltl-linux64 --gc-threshold 2000000 -i /home/mcc/execution/LTLFireability.pnml.gal -t CGAL -LTL /home/mcc/execution/LTLFireability.ltl -c -stutter-deadlock
Read 16 LTL properties
Checking formula 0 : !((X("((p_i2>=1)&&(initialized>=1))")))
Formula 0 simplified : !X"((p_i2>=1)&&(initialized>=1))"
Presburger conditions satisfied. Using coverability to approximate state space in K-Induction.
// Phase 1: matrix 11 rows 15 cols
invariant :initialize + initialized + -1'p_i2 = 0
invariant :move + moved + r_moving + -1'p_m = 0
invariant :p_rdy + -1'access + p_i1 + p_i2 = 1
invariant :r_stopped + r_active + r_moving = 100
invariant :p_sc + p_m + p_rel + access = 100
invariant :off + -1'r_active + -1'r_moving + -1'p_i1 + initialized + -1'p_i2 = -101
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit//lts_install_dir//include, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/home/mcc/execution]
Compilation finished in 598 ms.
Running link step : CommandLine [args=[gcc, -shared, -o, gal.so, model.o], workingDir=/home/mcc/execution]
Link finished in 82 ms.
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, --when, --ltl, X((LTLAP0==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 462 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, -p, --pins-guards, --when, --ltl, <>(<>((LTLAP1==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 99 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, -p, --pins-guards, --when, --ltl, ((<>((LTLAP2==true)))U(<>((LTLAP3==true))))U((<>((LTLAP1==true)))U(<>((LTLAP2==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 69 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, -p, --pins-guards, --when, --ltl, []((LTLAP0==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 76 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-03 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, --when, --ltl, ((<>((LTLAP4==true)))U((LTLAP5==true)))U(<>(<>(X((LTLAP1==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 150 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, -p, --pins-guards, --when, --ltl, (([]((LTLAP6==true)))U(<>((LTLAP7==true))))U(<>([]([]((LTLAP8==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 252 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, -p, --pins-guards, --when, --ltl, (LTLAP9==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 131 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, --when, --ltl, ((LTLAP10==true))U(<>(<>(X((LTLAP0==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 508 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-07 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, -p, --pins-guards, --when, --ltl, ((LTLAP2==true))U(<>(<>((LTLAP9==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 108 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, --when, --ltl, X((LTLAP4==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 167 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, -p, --pins-guards, --when, --ltl, []([]((LTLAP4==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 88 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-10 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, --when, --ltl, ([]([](X((LTLAP6==true)))))U([]((LTLAP7==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 84 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-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=8, --when, --ltl, X([]([](<>([]((LTLAP1==true)))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 56 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-12 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, --when, --ltl, (<>((LTLAP0==true)))U(X((LTLAP1==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 158 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-13 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, -p, --pins-guards, --when, --ltl, <>((<>(<>((LTLAP8==true))))U((LTLAP2==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 194 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-14 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, --when, --ltl, <>(X((<>((LTLAP8==true)))U((LTLAP7==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 213 ms.
FORMULA RobotManipulation-PT-00050-LTLFireability-15 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
ITS tools runner thread asked to quit. Dying gracefully.

BK_STOP 1553112587672

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

+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ LTLFireability = StateSpace ]]
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution LTLFireability -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 -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination LTLFireability -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
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -its, -ltsminpath, /home/mcc/BenchKit//lts_install_dir/, -smt]
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 41 ms
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 15 places.
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 11 transitions.
Mar 20, 2019 8:09:42 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 11 ms
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 29 ms
Mar 20, 2019 8:09:42 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/LTLFireability.pnml.gal : 3 ms
Mar 20, 2019 8:09:42 PM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSLTLTools
INFO: Time to serialize properties into /home/mcc/execution/LTLFireability.ltl : 3 ms
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 11 transitions.
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver computeAndDeclareInvariants
INFO: Computed 6 place invariants in 9 ms
Mar 20, 2019 8:09:42 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver init
INFO: Proved 15 variables to be positive in 71 ms
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may disable matrix : 11 transitions.
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of disable matrix completed :0/11 took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete disable matrix. took 2 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may enable matrix : 11 transitions.
Mar 20, 2019 8:09:43 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)
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeCoEnablingMatrix
INFO: Computing symmetric co enabling matrix : 11 transitions.
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Finished co-enabling matrix. took 207 ms. Total solver calls (SAT/UNSAT): 27(27/0)
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeDoNotAccord
INFO: Computing Do-Not-Accords matrix : 11 transitions.
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Completed DNA matrix. took 100 ms. Total solver calls (SAT/UNSAT): 20(0/20)
Mar 20, 2019 8:09:43 PM fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext transform
INFO: Built C files in 1023ms 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="RobotManipulation-PT-00050"
export BK_EXAMINATION="LTLFireability"
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

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-3954"
echo " Executing tool itstools"
echo " Input is RobotManipulation-PT-00050, examination is LTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r151-ebro-155286406400196"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/RobotManipulation-PT-00050.tgz
mv RobotManipulation-PT-00050 execution
cd execution
if [ "LTLFireability" = "GlobalProperties" ] ; then
rm -f GenericPropertiesVerdict.xml
fi
if [ "LTLFireability" = "UpperBounds" ] ; 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 [ "LTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLFireability" != "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 "LTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLFireability.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 '' LTLFireability.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 ;