Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2021-input.r216-tall-162098205700882.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2021-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
..................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is ShieldPPPt-PT-050A, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r216-tall-162098205700882
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 672K
-rw-r--r-- 1 mcc users 11K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 94K May 10 09:44 CTLCardinality.xml
-rw-r--r-- 1 mcc users 8.6K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 78K May 10 09:44 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.6K May 6 14:48 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.3K Mar 28 16:39 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Mar 28 16:39 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Mar 28 16:39 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K Mar 28 16:39 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.5K Mar 27 12:34 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 18K Mar 27 12:34 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Mar 25 18:39 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 14K Mar 25 18:39 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 22 08:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Mar 22 08:16 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 5 16:52 equiv_col
-rw-r--r-- 1 mcc users 5 May 5 16:52 instance
-rw-r--r-- 1 mcc users 6 May 5 16:52 iscolored
-rw-r--r-- 1 mcc users 337K May 5 16:52 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 ShieldPPPt-PT-050A-00
FORMULA_NAME ShieldPPPt-PT-050A-01
FORMULA_NAME ShieldPPPt-PT-050A-02
FORMULA_NAME ShieldPPPt-PT-050A-03
FORMULA_NAME ShieldPPPt-PT-050A-04
FORMULA_NAME ShieldPPPt-PT-050A-05
FORMULA_NAME ShieldPPPt-PT-050A-06
FORMULA_NAME ShieldPPPt-PT-050A-07
FORMULA_NAME ShieldPPPt-PT-050A-08
FORMULA_NAME ShieldPPPt-PT-050A-09
FORMULA_NAME ShieldPPPt-PT-050A-10
FORMULA_NAME ShieldPPPt-PT-050A-11
FORMULA_NAME ShieldPPPt-PT-050A-12
FORMULA_NAME ShieldPPPt-PT-050A-13
FORMULA_NAME ShieldPPPt-PT-050A-14
FORMULA_NAME ShieldPPPt-PT-050A-15

=== Now, execution of the tool begins

BK_START 1622927255436

Running Version 0
[2021-06-05 21:07:36] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2021-06-05 21:07:36] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-06-05 21:07:37] [INFO ] Load time of PNML (sax parser for PT used): 104 ms
[2021-06-05 21:07:37] [INFO ] Transformed 1253 places.
[2021-06-05 21:07:37] [INFO ] Transformed 903 transitions.
[2021-06-05 21:07:37] [INFO ] Found NUPN structural information;
[2021-06-05 21:07:37] [INFO ] Parsed PT model containing 1253 places and 903 transitions in 185 ms.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 9 ms.
Working with output stream class java.io.PrintStream
[2021-06-05 21:07:37] [INFO ] Initial state test concluded for 2 properties.
Ensure Unique test removed 1 transitions
Reduce redundant transitions removed 1 transitions.
FORMULA ShieldPPPt-PT-050A-07 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 67 out of 1253 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 1253/1253 places, 902/902 transitions.
Applied a total of 0 rules in 139 ms. Remains 1253 /1253 variables (removed 0) and now considering 902/902 (removed 0) transitions.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:37] [INFO ] Computed 551 place invariants in 31 ms
[2021-06-05 21:07:38] [INFO ] Implicit Places using invariants in 1027 ms returned []
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:38] [INFO ] Computed 551 place invariants in 19 ms
[2021-06-05 21:07:39] [INFO ] Implicit Places using invariants and state equation in 1315 ms returned []
Implicit Place search using SMT with State Equation took 2386 ms to find 0 implicit places.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:39] [INFO ] Computed 551 place invariants in 9 ms
[2021-06-05 21:07:40] [INFO ] Dead Transitions using invariants and state equation in 672 ms returned []
Finished structural reductions, in 1 iterations. Remains : 1253/1253 places, 902/902 transitions.
[2021-06-05 21:07:40] [INFO ] Initial state reduction rules for LTL removed 2 formulas.
[2021-06-05 21:07:40] [INFO ] Flatten gal took : 185 ms
FORMULA ShieldPPPt-PT-050A-08 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldPPPt-PT-050A-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldPPPt-PT-050A-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-06-05 21:07:40] [INFO ] Flatten gal took : 83 ms
[2021-06-05 21:07:41] [INFO ] Input system was already deterministic with 902 transitions.
Incomplete random walk after 100000 steps, including 2 resets, run finished after 1068 ms. (steps per millisecond=93 ) properties (out of 33) seen :8
Running SMT prover for 25 properties.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:42] [INFO ] Computed 551 place invariants in 11 ms
[2021-06-05 21:07:43] [INFO ] [Real]Absence check using 551 positive place invariants in 93 ms returned sat
[2021-06-05 21:07:43] [INFO ] SMT Verify possible in real domain returnedunsat :0 sat :0 real:25
[2021-06-05 21:07:44] [INFO ] [Nat]Absence check using 551 positive place invariants in 92 ms returned sat
[2021-06-05 21:07:44] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-06-05 21:07:46] [INFO ] [Nat]Absence check using state equation in 1418 ms returned unsat :0 sat :25
Attempting to minimize the solution found.
Minimization took 1028 ms.
[2021-06-05 21:07:47] [INFO ] SMT Verify possible in nat domain returned unsat :0 sat :25
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(((p0 U p1)&&X(X((G(p2)||X(F(p3)))))))], workingDir=/home/mcc/execution]
Support contains 6 out of 1253 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 1253/1253 places, 902/902 transitions.
Applied a total of 0 rules in 42 ms. Remains 1253 /1253 variables (removed 0) and now considering 902/902 (removed 0) transitions.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:47] [INFO ] Computed 551 place invariants in 11 ms
[2021-06-05 21:07:48] [INFO ] Implicit Places using invariants in 723 ms returned []
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:48] [INFO ] Computed 551 place invariants in 3 ms
[2021-06-05 21:07:49] [INFO ] Implicit Places using invariants and state equation in 1403 ms returned []
Implicit Place search using SMT with State Equation took 2128 ms to find 0 implicit places.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:49] [INFO ] Computed 551 place invariants in 3 ms
[2021-06-05 21:07:50] [INFO ] Dead Transitions using invariants and state equation in 629 ms returned []
Finished structural reductions, in 1 iterations. Remains : 1253/1253 places, 902/902 transitions.
Stuttering acceptance computed with spot in 507 ms :[(OR (NOT p1) (AND (NOT p2) (NOT p3))), true, (NOT p1), (AND (NOT p3) (NOT p2)), (AND (NOT p3) (NOT p2)), (NOT p3), (AND (NOT p3) (NOT p2))]
Running random walk in product with property : ShieldPPPt-PT-050A-00 automaton TGBA [mat=[[{ cond=(AND (NOT p1) (NOT p0)), acceptance={} source=0 dest: 1}, { cond=(AND (NOT p1) p0), acceptance={} source=0 dest: 2}, { cond=(OR p1 p0), acceptance={} source=0 dest: 3}], [{ cond=true, acceptance={0} source=1 dest: 1}], [{ cond=(AND (NOT p1) (NOT p0)), acceptance={0} source=2 dest: 1}, { cond=(AND (NOT p1) p0), acceptance={0} source=2 dest: 2}], [{ cond=true, acceptance={} source=3 dest: 4}], [{ cond=(NOT p2), acceptance={} source=4 dest: 5}, { cond=p2, acceptance={} source=4 dest: 6}], [{ cond=(NOT p3), acceptance={0} source=5 dest: 5}], [{ cond=(AND (NOT p2) (NOT p3)), acceptance={} source=6 dest: 5}, { cond=(AND p2 (NOT p3)), acceptance={} source=6 dest: 6}]], initial=0, aps=[p1:(OR (EQ s504 0) (EQ s523 0)), p0:(AND (EQ s208 1) (EQ s225 1)), p2:(OR (NEQ s905 1) (NEQ s922 1)), p3:(OR (NEQ s504 1) (NEQ s523 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null, null, null][false, false, false, false, false, false, false]]
Product exploration explored 100000 steps with 25000 reset in 2189 ms.
Product exploration explored 100000 steps with 25000 reset in 2141 ms.
Knowledge obtained : [p1, (NOT p0), p2, p3]
Adopting property with smaller alphabet thanks to knowledge :p1
Stuttering acceptance computed with spot in 155 ms :[(NOT p3), (AND (NOT p3) (NOT p2)), (AND (NOT p3) p1 (NOT p2)), (AND (NOT p3) (NOT p2)), (AND (NOT p3) (NOT p2))]
Support contains 4 out of 1253 places. Attempting structural reductions.
Property had overlarge support with respect to TGBA, discarding it for now.
Starting structural reductions, iteration 0 : 1253/1253 places, 902/902 transitions.
Applied a total of 0 rules in 21 ms. Remains 1253 /1253 variables (removed 0) and now considering 902/902 (removed 0) transitions.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:55] [INFO ] Computed 551 place invariants in 7 ms
[2021-06-05 21:07:56] [INFO ] Implicit Places using invariants in 695 ms returned []
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:56] [INFO ] Computed 551 place invariants in 4 ms
[2021-06-05 21:07:57] [INFO ] Implicit Places using invariants and state equation in 1443 ms returned []
Implicit Place search using SMT with State Equation took 2139 ms to find 0 implicit places.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:07:57] [INFO ] Computed 551 place invariants in 10 ms
[2021-06-05 21:07:58] [INFO ] Dead Transitions using invariants and state equation in 628 ms returned []
Finished structural reductions, in 1 iterations. Remains : 1253/1253 places, 902/902 transitions.
Stuttering acceptance computed with spot in 161 ms :[(NOT p3), (AND (NOT p3) (NOT p2)), (AND (NOT p3) p1 (NOT p2)), (AND (NOT p3) (NOT p2)), (AND (NOT p3) (NOT p2))]
Product exploration explored 100000 steps with 25000 reset in 2019 ms.
Product exploration explored 100000 steps with 25000 reset in 2164 ms.
Applying partial POR strategy [true, false, false, false, true]
Stuttering acceptance computed with spot in 144 ms :[(NOT p3), (AND (NOT p3) (NOT p2)), (AND (NOT p3) p1 (NOT p2)), (AND (NOT p3) (NOT p2)), (AND (NOT p3) (NOT p2))]
Support contains 4 out of 1253 places. Attempting structural reductions.
Property had overlarge support with respect to TGBA, discarding it for now.
Starting structural reductions, iteration 0 : 1253/1253 places, 902/902 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 2 places in 2 ms
Iterating global reduction 0 with 2 rules applied. Total rules applied 2 place count 1253 transition count 902
Deduced a syphon composed of 2 places in 1 ms
Applied a total of 2 rules in 226 ms. Remains 1253 /1253 variables (removed 0) and now considering 902/902 (removed 0) transitions.
[2021-06-05 21:08:03] [INFO ] Redundant transitions in 59 ms returned []
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:08:03] [INFO ] Computed 551 place invariants in 7 ms
[2021-06-05 21:08:03] [INFO ] Dead Transitions using invariants and state equation in 622 ms returned []
Finished structural reductions, in 1 iterations. Remains : 1253/1253 places, 902/902 transitions.
Product exploration explored 100000 steps with 25000 reset in 6013 ms.
Product exploration explored 100000 steps with 25000 reset in 6033 ms.
Starting structural reductions, iteration 0 : 1253/1253 places, 902/902 transitions.
Applied a total of 0 rules in 22 ms. Remains 1253 /1253 variables (removed 0) and now considering 902/902 (removed 0) transitions.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:08:16] [INFO ] Computed 551 place invariants in 3 ms
[2021-06-05 21:08:16] [INFO ] Implicit Places using invariants in 775 ms returned []
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:08:16] [INFO ] Computed 551 place invariants in 2 ms
[2021-06-05 21:08:18] [INFO ] Implicit Places using invariants and state equation in 1317 ms returned []
Implicit Place search using SMT with State Equation took 2114 ms to find 0 implicit places.
// Phase 1: matrix 902 rows 1253 cols
[2021-06-05 21:08:18] [INFO ] Computed 551 place invariants in 3 ms
[2021-06-05 21:08:18] [INFO ] Dead Transitions using invariants and state equation in 624 ms returned []
Finished structural reductions, in 1 iterations. Remains : 1253/1253 places, 902/902 transitions.
Application raised an uncaught exception null
java.lang.UnsupportedOperationException
at fr.lip6.move.gal.application.MccTranslator.toGal(MccTranslator.java:879)
at fr.lip6.move.gal.application.MccTranslator.lambda$3(MccTranslator.java:862)
at fr.lip6.move.gal.structural.expr.NaryOp.forEachChild(NaryOp.java:153)
at fr.lip6.move.gal.application.MccTranslator.toGal(MccTranslator.java:862)
at fr.lip6.move.gal.application.MccTranslator.toGal(MccTranslator.java:760)
at fr.lip6.move.gal.application.MccTranslator.rebuildSpecification(MccTranslator.java:729)
at fr.lip6.move.gal.application.GlobalPropertySolver.verifyWithSDD(GlobalPropertySolver.java:585)
at fr.lip6.move.gal.application.LTLPropertySolver.runStutteringLTLTest(LTLPropertySolver.java:269)
at fr.lip6.move.gal.application.LTLPropertySolver.runStructuralLTLCheck(LTLPropertySolver.java:60)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:470)
at fr.lip6.move.gal.application.Application.start(Application.java:140)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:43)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1461)
at org.eclipse.equinox.launcher.Main.main(Main.java:1434)

BK_STOP 1622927299718

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ LTLFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution LTLFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination LTLFireability -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="ShieldPPPt-PT-050A"
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"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# 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 2-4028"
echo " Executing tool itstools"
echo " Input is ShieldPPPt-PT-050A, 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 r216-tall-162098205700882"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ShieldPPPt-PT-050A.tgz
mv ShieldPPPt-PT-050A execution
cd execution
if [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "UpperBounds" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] || [ "LTLFireability" = "StateSpace" ]; 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
elif [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLFireability"
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 ;