Execution Chart

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

Trace from the execution

Formatting '/data/fko/mcc2022-input.r215-oct2-165281605900183.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fko/mcc2022-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 gold2021
Input is ServersAndClients-PT-100160, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r215-oct2-165281605900183
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 11M
-rw-r--r-- 1 mcc users 8.0K Apr 29 17:09 CTLCardinality.txt
-rw-r--r-- 1 mcc users 82K Apr 29 17:09 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.9K Apr 29 17:06 CTLFireability.txt
-rw-r--r-- 1 mcc users 59K Apr 29 17:06 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.1K May 9 08:45 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 9 08:45 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K May 9 08:45 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K May 9 08:45 LTLFireability.xml
-rw-r--r-- 1 mcc users 15K Apr 29 17:17 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 148K Apr 29 17:17 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 13K Apr 29 17:14 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 106K Apr 29 17:14 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K May 9 08:45 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K May 9 08:45 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 10 09:34 equiv_col
-rw-r--r-- 1 mcc users 7 May 10 09:34 instance
-rw-r--r-- 1 mcc users 6 May 10 09:34 iscolored
-rw-r--r-- 1 mcc users 9.8M May 10 09:34 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 ServersAndClients-PT-100160-ReachabilityFireability-00
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-01
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-02
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-03
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-04
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-05
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-06
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-07
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-08
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-09
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-10
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-11
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-12
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-13
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-14
FORMULA_NAME ServersAndClients-PT-100160-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1655068588148

Running Version 0
[2022-06-12 21:16:29] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -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]
[2022-06-12 21:16:29] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-06-12 21:16:29] [INFO ] Load time of PNML (sax parser for PT used): 454 ms
[2022-06-12 21:16:29] [INFO ] Transformed 16561 places.
[2022-06-12 21:16:30] [INFO ] Transformed 32200 transitions.
[2022-06-12 21:16:30] [INFO ] Parsed PT model containing 16561 places and 32200 transitions in 583 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 20 ms.
Working with output stream class java.io.PrintStream
Incomplete random walk after 10000 steps, including 2 resets, run finished after 499 ms. (steps per millisecond=20 ) properties (out of 16) seen :3
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-15 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 59 ms. (steps per millisecond=169 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 85 ms. (steps per millisecond=117 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 49 ms. (steps per millisecond=204 ) properties (out of 13) seen :1
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 61 ms. (steps per millisecond=163 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 47 ms. (steps per millisecond=212 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 53 ms. (steps per millisecond=188 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 40 ms. (steps per millisecond=250 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 39 ms. (steps per millisecond=256 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 52 ms. (steps per millisecond=192 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 55 ms. (steps per millisecond=181 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 45 ms. (steps per millisecond=222 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 42 ms. (steps per millisecond=238 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 55 ms. (steps per millisecond=181 ) properties (out of 12) seen :0
Running SMT prover for 12 properties.
// Phase 1: matrix 32200 rows 16561 cols
[2022-06-12 21:16:31] [INFO ] Computed 361 place invariants in 335 ms
[2022-06-12 21:16:36] [INFO ] [Real]Absence check using 261 positive place invariants in 645 ms returned sat
[2022-06-12 21:16:36] [INFO ] [Real]Absence check using 261 positive and 100 generalized place invariants in 234 ms returned sat
[2022-06-12 21:16:36] [INFO ] SMT Verify possible in real domain returnedunsat :3 sat :0 real:9
[2022-06-12 21:16:39] [INFO ] [Nat]Absence check using 261 positive place invariants in 660 ms returned sat
[2022-06-12 21:16:40] [INFO ] [Nat]Absence check using 261 positive and 100 generalized place invariants in 240 ms returned sat
[2022-06-12 21:16:41] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2022-06-12 21:17:01] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-13 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-12 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-11 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-10 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-08 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-07 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-06 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-04 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-01 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-00 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 12 Parikh solutions to 1 different solutions.
Support contains 76 out of 16561 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 16561/16561 places, 32200/32200 transitions.
Drop transitions removed 9678 transitions
Trivial Post-agglo rules discarded 9678 transitions
Performed 9678 trivial Post agglomeration. Transition count delta: 9678
Iterating post reduction 0 with 9678 rules applied. Total rules applied 9678 place count 16561 transition count 22522
Reduce places removed 9678 places and 0 transitions.
Performed 3404 Post agglomeration using F-continuation condition.Transition count delta: 3404
Iterating post reduction 1 with 13082 rules applied. Total rules applied 22760 place count 6883 transition count 19118
Reduce places removed 3520 places and 0 transitions.
Ensure Unique test removed 11500 transitions
Reduce isomorphic transitions removed 11500 transitions.
Iterating post reduction 2 with 15020 rules applied. Total rules applied 37780 place count 3363 transition count 7618
Drop transitions removed 1482 transitions
Redundant transition composition rules discarded 1482 transitions
Iterating global reduction 3 with 1482 rules applied. Total rules applied 39262 place count 3363 transition count 6136
Partial Free-agglomeration rule applied 74 times.
Drop transitions removed 74 transitions
Iterating global reduction 3 with 74 rules applied. Total rules applied 39336 place count 3363 transition count 6136
Applied a total of 39336 rules in 2577 ms. Remains 3363 /16561 variables (removed 13198) and now considering 6136/32200 (removed 26064) transitions.
Finished structural reductions, in 1 iterations. Remains : 3363/16561 places, 6136/32200 transitions.
[2022-06-12 21:17:04] [INFO ] Flatten gal took : 306 ms
[2022-06-12 21:17:04] [INFO ] Flatten gal took : 188 ms
[2022-06-12 21:17:04] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality4890044361273289996.gal : 48 ms
[2022-06-12 21:17:04] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality8822510172181159928.prop : 1 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality4890044361273289996.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality8822510172181159928.prop, --nowitness, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality4890044361273289996.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality8822510172181159928.prop --nowitness --gen-order FOLLOW
Loading property file /tmp/ReachabilityCardinality8822510172181159928.prop.
SDD proceeding with computation,2 properties remain. new max is 4
SDD size :1 after 49
SDD proceeding with computation,2 properties remain. new max is 8
SDD size :49 after 51
SDD proceeding with computation,2 properties remain. new max is 16
SDD size :51 after 56
Detected timeout of ITS tools.
[2022-06-12 21:17:19] [INFO ] Flatten gal took : 168 ms
[2022-06-12 21:17:19] [INFO ] Applying decomposition
[2022-06-12 21:17:20] [INFO ] Flatten gal took : 167 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/convert-linux64, -i, /tmp/graph3987071558780421111.txt, -o, /tmp/graph3987071558780421111.bin, -w, /tmp/graph3987071558780421111.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/louvain-linux64, /tmp/graph3987071558780421111.bin, -l, -1, -v, -w, /tmp/graph3987071558780421111.weights, -q, 0, -e, 0.001], workingDir=null]
[2022-06-12 21:17:20] [INFO ] Decomposing Gal with order
[2022-06-12 21:17:20] [INFO ] Rewriting arrays to variables to allow decomposition.
[2022-06-12 21:17:21] [INFO ] Removed a total of 5960 redundant transitions.
[2022-06-12 21:17:21] [INFO ] Flatten gal took : 805 ms
[2022-06-12 21:17:22] [INFO ] Fuse similar labels procedure discarded/fused a total of 276 labels/synchronizations in 149 ms.
[2022-06-12 21:17:22] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality11223141911592264329.gal : 36 ms
[2022-06-12 21:17:22] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality10453399370389468048.prop : 2 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality11223141911592264329.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality10453399370389468048.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality11223141911592264329.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality10453399370389468048.prop --nowitness
Loading property file /tmp/ReachabilityCardinality10453399370389468048.prop.
SDD proceeding with computation,2 properties remain. new max is 4
SDD size :1 after 10
SDD proceeding with computation,2 properties remain. new max is 8
SDD size :10 after 61
SDD proceeding with computation,2 properties remain. new max is 16
SDD size :61 after 193
SDD proceeding with computation,2 properties remain. new max is 32
SDD size :193 after 852
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
petri\_inst\_inst\_mod\_flat,3119,6.71092,113724,7412,1139,80866,8157,13445,44729,357,37429,0
Total reachable state count : 3119

Verifying 2 reachability properties.
Reachability property ServersAndClients-PT-100160-ReachabilityFireability-09 is true.
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-09 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
ServersAndClients-PT-100160-ReachabilityFireability-09,1,6.71687,113724,168,103,80866,8157,13445,44729,359,37429,0
Reachability property ServersAndClients-PT-100160-ReachabilityFireability-14 is true.
FORMULA ServersAndClients-PT-100160-ReachabilityFireability-14 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
ServersAndClients-PT-100160-ReachabilityFireability-14,1,6.80155,113724,166,103,80866,8157,13562,44729,372,37429,67008
All properties solved without resorting to model-checking.

BK_STOP 1655068649031

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -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 ReachabilityFireability -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="ServersAndClients-PT-100160"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="gold2021"
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 gold2021"
echo " Input is ServersAndClients-PT-100160, examination is ReachabilityFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r215-oct2-165281605900183"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ServersAndClients-PT-100160.tgz
mv ServersAndClients-PT-100160 execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityFireability.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;