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 196K
-rw-r--r-- 1 mcc users 3.5K 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 2.4K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 14K 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 5.9K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.5K May 26 09:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 11K May 26 09:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 1.9K May 26 09:26 LTLFireability.txt
-rw-r--r-- 1 mcc users 8.3K May 26 09:26 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.9K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 19K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 111 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 349 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 3.3K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 19K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K 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 18:50 equiv_col
-rw-r--r-- 1 mcc users 4 May 15 18:50 instance
-rw-r--r-- 1 mcc users 6 May 15 18:50 iscolored
-rwxr-xr-x 1 mcc users 29K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstools
Input is HexagonalGrid-PT-126, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r212-smll-152732263000265
=====================================================================

--------------------
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 HexagonalGrid-PT-126-LTLCardinality-00
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-01
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-02
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-03
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-04
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-05
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-06
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-07
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-08
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-09
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-10
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-11
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-12
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-13
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-14
FORMULA_NAME HexagonalGrid-PT-126-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1527940699576

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-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_1.0.0.201805151631/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(G(X(X("(po6_1_1<=pi4_1_1)"))))))
Formula 0 simplified : !XGXX"(po6_1_1<=pi4_1_1)"
Presburger conditions satisfied. Using coverability to approximate state space in K-Induction.
// Phase 1: matrix 42 rows 31 cols
invariant :po2_1_1 + pol2_1_1 = 1
invariant :pi4_1_1 + pil4_1_1 = 1
invariant :po3_1_1 + pol3_1_1 = 1
invariant :pi2_1_1 + pil2_1_1 = 1
invariant :po1_1_1 + pol1_1_1 = 1
invariant :po5_1_1 + pol5_1_1 = 1
invariant :pbl_1_1 + pil1_1_1 + pil2_1_1 + pil3_1_1 + pil4_1_1 + pil5_1_1 + pil6_1_1 + pol1_1_1 + pol2_1_1 + pol3_1_1 + pol4_1_1 + pol5_1_1 + pol6_1_1 = 18
invariant :pi5_1_1 + pil5_1_1 = 1
invariant :po4_1_1 + pol4_1_1 = 1
invariant :po6_1_1 + pol6_1_1 = 1
invariant :pi3_1_1 + pil3_1_1 = 1
invariant :pb1_1_1 + pb2_1_1 + pb3_1_1 + pb4_1_1 + pb5_1_1 + pb6_1_1 + -1'pil1_1_1 + -1'pil2_1_1 + -1'pil3_1_1 + -1'pil4_1_1 + -1'pil5_1_1 + -1'pil6_1_1 + -1'pol1_1_1 + -1'pol2_1_1 + -1'pol3_1_1 + -1'pol4_1_1 + -1'pol5_1_1 + -1'pol6_1_1 = 0
invariant :pi6_1_1 + pil6_1_1 = 1
invariant :pi1_1_1 + pil1_1_1 = 1
Reverse transition relation is exact ! Faster fixpoint algorithm enabled.
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 1419 ms.
Running link step : CommandLine [args=[gcc, -shared, -o, gal.so, model.o], workingDir=/home/mcc/execution]
Link finished in 41 ms.
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X([](X(X((LTLAP0==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 39 ms.
FORMULA HexagonalGrid-PT-126-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, --when, --ltl, [](<>(X(X((LTLAP1==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 34 ms.
FORMULA HexagonalGrid-PT-126-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, []((LTLAP2==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 17 ms.
FORMULA HexagonalGrid-PT-126-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, (LTLAP3==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 24 ms.
FORMULA HexagonalGrid-PT-126-LTLCardinality-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=1, --when, --ltl, []((X((LTLAP4==true)))U((LTLAP5==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 27 ms.
FORMULA HexagonalGrid-PT-126-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, --when, --ltl, X(<>(((LTLAP6==true))U((LTLAP7==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 26 ms.
FORMULA HexagonalGrid-PT-126-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, (LTLAP8==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 28 ms.
FORMULA HexagonalGrid-PT-126-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, --when, --ltl, ([](X((LTLAP9==true))))U(X([]((LTLAP10==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 26 ms.
FORMULA HexagonalGrid-PT-126-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, -p, --pins-guards, --when, --ltl, <>(([]((LTLAP11==true)))U((LTLAP12==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 26 ms.
FORMULA HexagonalGrid-PT-126-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, -p, --pins-guards, --when, --ltl, ((LTLAP13==true))U(((LTLAP14==true))U((LTLAP15==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 19 ms.
FORMULA HexagonalGrid-PT-126-LTLCardinality-09 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, []([]([]((LTLAP16==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 28 ms.
FORMULA HexagonalGrid-PT-126-LTLCardinality-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=1, --when, --ltl, X([]([](X((LTLAP17==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 25 ms.
FORMULA HexagonalGrid-PT-126-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, --when, --ltl, <>(X((LTLAP18==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 18 ms.
FORMULA HexagonalGrid-PT-126-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, --when, --ltl, X(([]((LTLAP19==true)))U([]((LTLAP20==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 25 ms.
FORMULA HexagonalGrid-PT-126-LTLCardinality-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=1, -p, --pins-guards, --when, --ltl, []((LTLAP21==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 26 ms.
FORMULA HexagonalGrid-PT-126-LTLCardinality-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=1, -p, --pins-guards, --when, --ltl, [](<>((LTLAP22==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 24 ms.
FORMULA HexagonalGrid-PT-126-LTLCardinality-15 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
ITS tools runner thread asked to quit. Dying gracefully.

BK_STOP 1527940712321

--------------------
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/ -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/ -smt -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss8m -Xms40m -Xmx8192m -Dfile.encoding=UTF-8 -Dosgi.requiredJavaVersion=1.6
Jun 02, 2018 11:58:22 AM 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/, -smt]
Jun 02, 2018 11:58:22 AM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
Jun 02, 2018 11:58:22 AM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 64 ms
Jun 02, 2018 11:58:22 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 31 places.
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 42 transitions.
Jun 02, 2018 11:58:23 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 12 ms
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 85 ms
Jun 02, 2018 11:58:23 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/LTLCardinality.pnml.gal : 4 ms
Jun 02, 2018 11:58:23 AM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSLTLTools
INFO: Time to serialize properties into /home/mcc/execution/LTLCardinality.ltl : 2 ms
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 42 transitions.
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver computeAndDeclareInvariants
INFO: Computed 14 place invariants in 18 ms
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver init
INFO: Proved 31 variables to be positive in 131 ms
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may disable matrix : 42 transitions.
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of disable matrix completed :0/42 took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete disable matrix. took 3 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Jun 02, 2018 11:58:23 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may enable matrix : 42 transitions.
Jun 02, 2018 11:58:23 AM 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)
Jun 02, 2018 11:58:24 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeCoEnablingMatrix
INFO: Computing symmetric co enabling matrix : 42 transitions.
Jun 02, 2018 11:58:26 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of co-enabling matrix(20/42) took 1865 ms. Total solver calls (SAT/UNSAT): 651(615/36)
Jun 02, 2018 11:58:27 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Finished co-enabling matrix. took 2541 ms. Total solver calls (SAT/UNSAT): 861(825/36)
Jun 02, 2018 11:58:27 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeDoNotAccord
INFO: Computing Do-Not-Accords matrix : 42 transitions.
Jun 02, 2018 11:58:29 AM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Completed DNA matrix. took 1621 ms. Total solver calls (SAT/UNSAT): 195(0/195)
Jun 02, 2018 11:58:29 AM fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext transform
INFO: Built C files in 5687ms 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="HexagonalGrid-PT-126"
export BK_EXAMINATION="LTLCardinality"
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/HexagonalGrid-PT-126.tgz
mv HexagonalGrid-PT-126 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 HexagonalGrid-PT-126, 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 r212-smll-152732263000265"
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 ;