Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2022-input.r006-tajo-165245689400537.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2022-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is BART-COL-005, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r006-tajo-165245689400537
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 404K
-rw-r--r-- 1 mcc users 6.6K Apr 29 20:27 CTLCardinality.txt
-rw-r--r-- 1 mcc users 58K Apr 29 20:27 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.0K Apr 29 20:15 CTLFireability.txt
-rw-r--r-- 1 mcc users 52K Apr 29 20:15 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K May 10 09:33 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.0K May 9 07:05 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K May 9 07:05 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K May 9 07:05 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K May 9 07:05 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.7K May 9 07:05 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K May 9 07:05 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 10 09:33 equiv_pt
-rw-r--r-- 1 mcc users 4 May 10 09:33 instance
-rw-r--r-- 1 mcc users 5 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 186K May 10 09:33 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 BART-COL-005-CTLCardinality-00
FORMULA_NAME BART-COL-005-CTLCardinality-01
FORMULA_NAME BART-COL-005-CTLCardinality-02
FORMULA_NAME BART-COL-005-CTLCardinality-03
FORMULA_NAME BART-COL-005-CTLCardinality-04
FORMULA_NAME BART-COL-005-CTLCardinality-05
FORMULA_NAME BART-COL-005-CTLCardinality-06
FORMULA_NAME BART-COL-005-CTLCardinality-07
FORMULA_NAME BART-COL-005-CTLCardinality-08
FORMULA_NAME BART-COL-005-CTLCardinality-09
FORMULA_NAME BART-COL-005-CTLCardinality-10
FORMULA_NAME BART-COL-005-CTLCardinality-11
FORMULA_NAME BART-COL-005-CTLCardinality-12
FORMULA_NAME BART-COL-005-CTLCardinality-13
FORMULA_NAME BART-COL-005-CTLCardinality-14
FORMULA_NAME BART-COL-005-CTLCardinality-15

=== Now, execution of the tool begins

BK_START 1652665951754

Running Version 202205111006
[2022-05-16 01:52:33] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -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]
[2022-05-16 01:52:33] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-05-16 01:52:33] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
log4j:WARN No appenders could be found for logger (org.apache.axiom.locator.DefaultOMMetaFactoryLocator).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[2022-05-16 01:52:33] [WARNING] Using fallBack plugin, rng conformance not checked
[2022-05-16 01:52:33] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 604 ms
[2022-05-16 01:52:33] [INFO ] Detected 3 constant HL places corresponding to 10373 PT places.
[2022-05-16 01:52:33] [INFO ] Imported 4 HL places and 7 HL transitions for a total of 11603 PT places and 7.03614756E9 transition bindings in 51 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 13 ms.
FORMULA BART-COL-005-CTLCardinality-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2022-05-16 01:52:34] [INFO ] Built PT skeleton of HLPN with 4 places and 7 transitions 26 arcs in 5 ms.
[2022-05-16 01:52:34] [INFO ] Skeletonized 15 HLPN properties in 5 ms.
Computed a total of 4 stabilizing places and 2 stable transitions
Remains 15 properties that can be checked using skeleton over-approximation.
Reduce places removed 3 places and 0 transitions.
Ensure Unique test removed 5 transitions
Reduce redundant transitions removed 5 transitions.
FORMULA BART-COL-005-CTLCardinality-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Computed a total of 1 stabilizing places and 1 stable transitions
Incomplete random walk after 10002 steps, including 1428 resets, run finished after 260 ms. (steps per millisecond=38 ) properties (out of 7) seen :1
Incomplete Best-First random walk after 10002 steps, including 1428 resets, run finished after 104 ms. (steps per millisecond=96 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10002 steps, including 1428 resets, run finished after 90 ms. (steps per millisecond=111 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10002 steps, including 1428 resets, run finished after 73 ms. (steps per millisecond=137 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10002 steps, including 1428 resets, run finished after 91 ms. (steps per millisecond=109 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10002 steps, including 1428 resets, run finished after 85 ms. (steps per millisecond=117 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10002 steps, including 1428 resets, run finished after 90 ms. (steps per millisecond=111 ) properties (out of 6) seen :0
Running SMT prover for 6 properties.
// Phase 1: matrix 2 rows 1 cols
[2022-05-16 01:52:34] [INFO ] Computed 0 place invariants in 6 ms
[2022-05-16 01:52:35] [INFO ] After 143ms SMT Verify possible using all constraints in real domain returned unsat :6 sat :0
Fused 6 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 1 ms.
Successfully simplified 6 atomic propositions for a total of 7 simplifications.
FORMULA BART-COL-005-CTLCardinality-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2022-05-16 01:52:35] [INFO ] Initial state reduction rules for CTL removed 7 formulas.
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 14 ms
FORMULA BART-COL-005-CTLCardinality-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-09 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-COL-005-CTLCardinality-00 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 0 ms
Domain [distance(41), speed(6), distance(41)] of place NewDistTable breaks symmetries in sort distance
Arc [1:1*[(MOD (ADD $tsp 1) 6), $ds2]] contains successor/predecessor on variables of sort speed
Symmetric sort wr.t. initial and guards and successors and join/free detected :trainid
Symmetric sort wr.t. initial detected :trainid
Symmetric sort wr.t. initial and guards detected :trainid
Applying symmetric unfolding of full symmetric sort :trainid domain size was 5
[2022-05-16 01:52:35] [INFO ] Unfolded HLPN to a Petri net with 10619 places and 323 transitions 601 arcs in 171 ms.
[2022-05-16 01:52:35] [INFO ] Unfolded 1 HLPN properties in 1 ms.
Deduced a syphon composed of 10215 places in 2 ms
Reduce places removed 10487 places and 121 transitions.
Support contains 0 out of 132 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 132/132 places, 202/202 transitions.
Discarding 32 places :
Symmetric choice reduction at 0 with 32 rule applications. Total rules 32 place count 100 transition count 170
Iterating global reduction 0 with 32 rules applied. Total rules applied 64 place count 100 transition count 170
Discarding 27 places :
Symmetric choice reduction at 0 with 27 rule applications. Total rules 91 place count 73 transition count 143
Iterating global reduction 0 with 27 rules applied. Total rules applied 118 place count 73 transition count 143
Discarding 4 places :
Symmetric choice reduction at 0 with 4 rule applications. Total rules 122 place count 69 transition count 139
Iterating global reduction 0 with 4 rules applied. Total rules applied 126 place count 69 transition count 139
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 129 place count 66 transition count 136
Iterating global reduction 0 with 3 rules applied. Total rules applied 132 place count 66 transition count 136
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 135 place count 63 transition count 133
Iterating global reduction 0 with 3 rules applied. Total rules applied 138 place count 63 transition count 133
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 141 place count 60 transition count 130
Iterating global reduction 0 with 3 rules applied. Total rules applied 144 place count 60 transition count 130
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 147 place count 57 transition count 127
Iterating global reduction 0 with 3 rules applied. Total rules applied 150 place count 57 transition count 127
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 153 place count 54 transition count 124
Iterating global reduction 0 with 3 rules applied. Total rules applied 156 place count 54 transition count 124
Discarding 2 places :
Symmetric choice reduction at 0 with 2 rule applications. Total rules 158 place count 52 transition count 122
Iterating global reduction 0 with 2 rules applied. Total rules applied 160 place count 52 transition count 122
Discarding 2 places :
Symmetric choice reduction at 0 with 2 rule applications. Total rules 162 place count 50 transition count 120
Iterating global reduction 0 with 2 rules applied. Total rules applied 164 place count 50 transition count 120
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 165 place count 49 transition count 119
Iterating global reduction 0 with 1 rules applied. Total rules applied 166 place count 49 transition count 119
Applied a total of 166 rules in 28 ms. Remains 49 /132 variables (removed 83) and now considering 119/202 (removed 83) transitions.
// Phase 1: matrix 119 rows 49 cols
[2022-05-16 01:52:35] [INFO ] Computed 1 place invariants in 10 ms
[2022-05-16 01:52:35] [INFO ] Implicit Places using invariants in 60 ms returned []
// Phase 1: matrix 119 rows 49 cols
[2022-05-16 01:52:35] [INFO ] Computed 1 place invariants in 6 ms
[2022-05-16 01:52:35] [INFO ] Implicit Places using invariants and state equation in 74 ms returned []
Implicit Place search using SMT with State Equation took 141 ms to find 0 implicit places.
// Phase 1: matrix 119 rows 49 cols
[2022-05-16 01:52:35] [INFO ] Computed 1 place invariants in 2 ms
[2022-05-16 01:52:35] [INFO ] Dead Transitions using invariants and state equation in 71 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 49/132 places, 119/202 transitions.
Finished structural reductions, in 1 iterations. Remains : 49/132 places, 119/202 transitions.
Support contains 0 out of 49 places after structural reductions.
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 9 ms
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 8 ms
[2022-05-16 01:52:35] [INFO ] Input system was already deterministic with 119 transitions.
Finished random walk after 0 steps, including 0 resets, run visited all 0 properties in 1 ms. (steps per millisecond=0 )
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 6 ms
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 5 ms
[2022-05-16 01:52:35] [INFO ] Input system was already deterministic with 119 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Starting structural reductions in LTL mode, iteration 0 : 49/49 places, 119/119 transitions.
Applied a total of 0 rules in 1 ms. Remains 49 /49 variables (removed 0) and now considering 119/119 (removed 0) transitions.
// Phase 1: matrix 119 rows 49 cols
[2022-05-16 01:52:35] [INFO ] Computed 1 place invariants in 6 ms
[2022-05-16 01:52:35] [INFO ] Implicit Places using invariants in 33 ms returned []
// Phase 1: matrix 119 rows 49 cols
[2022-05-16 01:52:35] [INFO ] Computed 1 place invariants in 9 ms
[2022-05-16 01:52:35] [INFO ] Implicit Places using invariants and state equation in 61 ms returned []
Implicit Place search using SMT with State Equation took 95 ms to find 0 implicit places.
// Phase 1: matrix 119 rows 49 cols
[2022-05-16 01:52:35] [INFO ] Computed 1 place invariants in 0 ms
[2022-05-16 01:52:35] [INFO ] Dead Transitions using invariants and state equation in 68 ms found 0 transitions.
Finished structural reductions, in 1 iterations. Remains : 49/49 places, 119/119 transitions.
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 11 ms
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 5 ms
[2022-05-16 01:52:35] [INFO ] Input system was already deterministic with 119 transitions.
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 4 ms
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 4 ms
[2022-05-16 01:52:35] [INFO ] Time to serialize gal into /tmp/CTLCardinality8086194271395396799.gal : 1 ms
[2022-05-16 01:52:35] [INFO ] Time to serialize properties into /tmp/CTLCardinality1482000497140667468.ctl : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202205111006/bin/its-ctl-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/CTLCardinality8086194271395396799.gal' '-t' 'CGAL' '-ctl' '/tmp/CTLCardinality1482000497140667468.ctl' '--gen-order' 'FOLLOW'

its-ctl command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202205111006/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /tmp/C...274
No direction supplied, using forward translation only.
Parsed 1 CTL formulae.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
reachable,2.86968e+06,0.027107,5384,2,290,5,5547,6,0,318,3844,0


Converting to forward existential form...Done !
original formula: AX(AX(EX(TRUE)))
=> equivalent forward existential formula: [(EY(EY(Init)) * !(EX(TRUE)))] = FALSE
Reverse transition relation is exact ! Faster fixpoint algorithm enabled.
(forward)formula 0,1,0.057575,6676,1,0,5,11723,9,0,1366,5008,2
FORMULA BART-COL-005-CTLCardinality-03 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL
Formula is TRUE !

***************************************

[2022-05-16 01:52:35] [INFO ] Flatten gal took : 4 ms
[2022-05-16 01:52:35] [INFO ] Flatten gal took : 4 ms
Total runtime 2724 ms.

BK_STOP 1652665956009

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

+ export LANG=C
+ LANG=C
+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ CTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution CTLCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ export PYTHONPATH=/usr/lib/python3.9/site-packages/
+ PYTHONPATH=/usr/lib/python3.9/site-packages/
+ export LD_LIBRARY_PATH=/usr/local/lib:
+ LD_LIBRARY_PATH=/usr/local/lib:
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202205111006.jar
+ VERSION=202205111006
+ echo 'Running Version 202205111006'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data @none -pnfolder /home/mcc/execution -examination CTLCardinality -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=@none -Xss128m -Xms40m -Xmx8192m

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="BART-COL-005"
export BK_EXAMINATION="CTLCardinality"
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 BART-COL-005, examination is CTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r006-tajo-165245689400537"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BART-COL-005.tgz
mv BART-COL-005 execution
cd execution
if [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "UpperBounds" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] || [ "CTLCardinality" = "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 [ "CTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLCardinality" != "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 "CTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLCardinality.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 '' CTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLCardinality"
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 ;