About the Execution of ITS-Tools for RobotManipulation-PT-01000
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
1809.000 | 41985.00 | 153071.00 | 240.30 | FFTFFFFFFFFFFTFF | 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-155286406400232.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-01000, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r151-ebro-155286406400232
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 172K
-rw-r--r-- 1 mcc users 3.4K Feb 12 14:35 CTLCardinality.txt
-rw-r--r-- 1 mcc users 17K Feb 12 14:35 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.7K Feb 8 16:31 CTLFireability.txt
-rw-r--r-- 1 mcc users 16K Feb 8 16:31 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 2.5K Feb 5 01:16 LTLCardinality.txt
-rw-r--r-- 1 mcc users 9.8K Feb 5 01:16 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 4 22:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 12K Feb 4 22:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.1K Feb 4 16:40 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 20K Feb 4 16:40 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.0K Feb 1 13:04 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 16K Feb 1 13:04 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-01000-LTLFireability-00
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-01
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-02
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-03
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-04
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-05
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-06
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-07
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-08
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-09
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-10
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-11
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-12
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-13
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-14
FORMULA_NAME RobotManipulation-PT-01000-LTLFireability-15
=== Now, execution of the tool begins
BK_START 1553124383059
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 : !(((F(X(G("(p_i1>=1)"))))U(F(G("(p_sc>=1)")))))
Formula 0 simplified : !(FXG"(p_i1>=1)" U FG"(p_sc>=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 = 2000
invariant :p_sc + p_m + p_rel + access = 2000
invariant :off + -1'r_active + -1'r_moving + -1'p_i1 + initialized + -1'p_i2 = -2001
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 711 ms.
Running link step : CommandLine [args=[gcc, -shared, -o, gal.so, model.o], workingDir=/home/mcc/execution]
Link finished in 58 ms.
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=8, --when, --ltl, (<>(X([]((LTLAP0==true)))))U(<>([]((LTLAP1==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 92 ms.
FORMULA RobotManipulation-PT-01000-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, (((LTLAP2==true))U([]((LTLAP3==true))))U(<>([](<>((LTLAP4==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 975 ms.
FORMULA RobotManipulation-PT-01000-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, --when, --ltl, X(((LTLAP5==true))U(<>((LTLAP5==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 26416 ms.
FORMULA RobotManipulation-PT-01000-LTLFireability-02 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, --when, --ltl, [](X(X((LTLAP3==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 348 ms.
FORMULA RobotManipulation-PT-01000-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, <>(X([]((LTLAP1==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 68 ms.
FORMULA RobotManipulation-PT-01000-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)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 1383 ms.
FORMULA RobotManipulation-PT-01000-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, (([]((LTLAP7==true)))U([]((LTLAP2==true))))U(<>(<>(<>((LTLAP6==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 1258 ms.
FORMULA RobotManipulation-PT-01000-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, X(<>([](X(X((LTLAP7==true)))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 196 ms.
FORMULA RobotManipulation-PT-01000-LTLFireability-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=8, --when, --ltl, [](<>((X((LTLAP8==true)))U((LTLAP2==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 279 ms.
FORMULA RobotManipulation-PT-01000-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, -p, --pins-guards, --when, --ltl, (<>(((LTLAP7==true))U((LTLAP2==true))))U([](((LTLAP0==true))U((LTLAP9==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 127 ms.
FORMULA RobotManipulation-PT-01000-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 960 ms.
FORMULA RobotManipulation-PT-01000-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, -p, --pins-guards, --when, --ltl, <>((((LTLAP0==true))U((LTLAP0==true)))U([]([]((LTLAP5==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 556 ms.
FORMULA RobotManipulation-PT-01000-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, []((<>(<>((LTLAP10==true))))U([](X((LTLAP9==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 1813 ms.
FORMULA RobotManipulation-PT-01000-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, -p, --pins-guards, --when, --ltl, (<>(((LTLAP3==true))U((LTLAP8==true))))U((<>((LTLAP3==true)))U(<>((LTLAP7==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 759 ms.
FORMULA RobotManipulation-PT-01000-LTLFireability-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=8, --when, --ltl, ((X((LTLAP10==true)))U(<>((LTLAP9==true))))U((LTLAP1==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 344 ms.
FORMULA RobotManipulation-PT-01000-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(X((<>((LTLAP9==true)))U(<>((LTLAP4==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 301 ms.
FORMULA RobotManipulation-PT-01000-LTLFireability-15 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
ITS tools runner thread asked to quit. Dying gracefully.
BK_STOP 1553124425044
--------------------
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 11:26:26 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 11:26:26 PM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
Mar 20, 2019 11:26:26 PM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 39 ms
Mar 20, 2019 11:26:26 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 15 places.
Mar 20, 2019 11:26:26 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 11 transitions.
Mar 20, 2019 11:26:26 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 10 ms
Mar 20, 2019 11:26:26 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 29 ms
Mar 20, 2019 11:26:26 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/LTLFireability.pnml.gal : 2 ms
Mar 20, 2019 11:26:26 PM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSLTLTools
INFO: Time to serialize properties into /home/mcc/execution/LTLFireability.ltl : 3 ms
Mar 20, 2019 11:26:26 PM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 11 transitions.
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver computeAndDeclareInvariants
INFO: Computed 6 place invariants in 9 ms
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver init
INFO: Proved 15 variables to be positive in 64 ms
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may disable matrix : 11 transitions.
Mar 20, 2019 11:26:27 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 11:26:27 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)
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may enable matrix : 11 transitions.
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete enable matrix. took 1 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeCoEnablingMatrix
INFO: Computing symmetric co enabling matrix : 11 transitions.
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Finished co-enabling matrix. took 228 ms. Total solver calls (SAT/UNSAT): 27(27/0)
Mar 20, 2019 11:26:27 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeDoNotAccord
INFO: Computing Do-Not-Accords matrix : 11 transitions.
Mar 20, 2019 11:26:28 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Completed DNA matrix. took 116 ms. Total solver calls (SAT/UNSAT): 20(0/20)
Mar 20, 2019 11:26:28 PM fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext transform
INFO: Built C files in 1107ms 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-01000"
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-01000, 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-155286406400232"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/RobotManipulation-PT-01000.tgz
mv RobotManipulation-PT-01000 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 '
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 ;