Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2023-input.r224-smll-167840362600163.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5348
Executing tool gold2022
Input is HealthRecord-PT-04, examination is StableMarking
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r224-smll-167840362600163
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 416K
-rw-r--r-- 1 mcc users 6.4K Feb 26 17:49 CTLCardinality.txt
-rw-r--r-- 1 mcc users 68K Feb 26 17:49 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.6K Feb 26 17:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 53K Feb 26 17:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.4K Feb 25 16:13 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Feb 25 16:13 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Feb 25 16:13 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 16:13 LTLFireability.xml
-rw-r--r-- 1 mcc users 7.4K Feb 26 17:50 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 72K Feb 26 17:50 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.3K Feb 26 17:50 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 61K Feb 26 17:50 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 16:13 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 16:13 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 50K Mar 5 18:22 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

FORMULA_NAME StableMarking

=== Now, execution of the tool begins

BK_START 1678647738005

Running Version 202205111006
[2023-03-12 19:02:20] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, StableMarking, -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, 1800]
[2023-03-12 19:02:20] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-12 19:02:20] [INFO ] Load time of PNML (sax parser for PT used): 174 ms
[2023-03-12 19:02:20] [INFO ] Transformed 123 places.
[2023-03-12 19:02:20] [INFO ] Transformed 239 transitions.
[2023-03-12 19:02:20] [INFO ] Found NUPN structural information;
[2023-03-12 19:02:20] [INFO ] Parsed PT model containing 123 places and 239 transitions in 384 ms.
Graph (trivial) has 190 edges and 123 vertex of which 8 / 123 are part of one of the 4 SCC in 8 ms
Free SCC test removed 4 places
Structural test allowed to assert that 27 places are NOT stable. Took 22 ms.
Ensure Unique test removed 12 transitions
Reduce redundant transitions removed 12 transitions.
Incomplete random walk after 10000 steps, including 873 resets, run finished after 1013 ms. (steps per millisecond=9 ) properties (out of 96) seen :48
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 13 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 20 ms. (steps per millisecond=50 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 10 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 10 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1000 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1000 steps, including 12 resets, run finished after 8 ms. (steps per millisecond=125 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1000 steps, including 11 resets, run finished after 8 ms. (steps per millisecond=125 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1000 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 10 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 13 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 8 ms. (steps per millisecond=125 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 17 ms. (steps per millisecond=58 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 48) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 48) seen :2
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 8 ms. (steps per millisecond=125 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 13 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1000 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 13 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 46) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 46) seen :4
Incomplete Best-First random walk after 1001 steps, including 13 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 42) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 42) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 42) seen :0
Incomplete Best-First random walk after 1000 steps, including 12 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 42) seen :0
Incomplete Best-First random walk after 1000 steps, including 11 resets, run finished after 10 ms. (steps per millisecond=100 ) properties (out of 42) seen :0
Incomplete Best-First random walk after 1001 steps, including 12 resets, run finished after 8 ms. (steps per millisecond=125 ) properties (out of 42) seen :0
Incomplete Best-First random walk after 1001 steps, including 13 resets, run finished after 8 ms. (steps per millisecond=125 ) properties (out of 42) seen :0
Running SMT prover for 42 properties.
[2023-03-12 19:02:22] [INFO ] Flow matrix only has 215 transitions (discarded 12 similar events)
// Phase 1: matrix 215 rows 119 cols
[2023-03-12 19:02:22] [INFO ] Computed 14 place invariants in 19 ms
[2023-03-12 19:02:23] [INFO ] After 727ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:42
[2023-03-12 19:02:23] [INFO ] [Nat]Absence check using 8 positive place invariants in 20 ms returned sat
[2023-03-12 19:02:23] [INFO ] [Nat]Absence check using 8 positive and 6 generalized place invariants in 15 ms returned sat
[2023-03-12 19:02:24] [INFO ] After 763ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :42
[2023-03-12 19:02:24] [INFO ] State equation strengthened by 1 read => feed constraints.
[2023-03-12 19:02:25] [INFO ] After 607ms SMT Verify possible using 1 Read/Feed constraints in natural domain returned unsat :0 sat :42
[2023-03-12 19:02:26] [INFO ] Deduced a trap composed of 30 places in 657 ms of which 14 ms to minimize.
[2023-03-12 19:02:26] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 697 ms
[2023-03-12 19:02:26] [INFO ] Deduced a trap composed of 38 places in 136 ms of which 3 ms to minimize.
[2023-03-12 19:02:26] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 202 ms
[2023-03-12 19:02:27] [INFO ] After 2686ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :42
Attempting to minimize the solution found.
Minimization took 608 ms.
[2023-03-12 19:02:27] [INFO ] After 4747ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :42
Fused 42 Parikh solutions to 25 different solutions.
Parikh walk visited 38 properties in 1200 ms.
Support contains 4 out of 119 places. Attempting structural reductions.
Starting structural reductions in SAFETY mode, iteration 0 : 119/119 places, 227/227 transitions.
Graph (complete) has 443 edges and 119 vertex of which 112 are kept as prefixes of interest. Removing 7 places using SCC suffix rule.7 ms
Discarding 7 places :
Also discarding 7 output transitions
Drop transitions removed 7 transitions
Drop transitions removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Drop transitions removed 3 transitions
Trivial Post-agglo rules discarded 3 transitions
Performed 3 trivial Post agglomeration. Transition count delta: 3
Iterating post reduction 0 with 9 rules applied. Total rules applied 10 place count 112 transition count 211
Reduce places removed 3 places and 0 transitions.
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Drop transitions removed 2 transitions
Trivial Post-agglo rules discarded 2 transitions
Performed 2 trivial Post agglomeration. Transition count delta: 2
Iterating post reduction 1 with 8 rules applied. Total rules applied 18 place count 109 transition count 206
Reduce places removed 2 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 3 rules applied. Total rules applied 21 place count 107 transition count 205
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 1 Pre rules applied. Total rules applied 21 place count 107 transition count 204
Deduced a syphon composed of 1 places in 1 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 23 place count 106 transition count 204
Discarding 55 places :
Symmetric choice reduction at 3 with 55 rule applications. Total rules 78 place count 51 transition count 94
Iterating global reduction 3 with 55 rules applied. Total rules applied 133 place count 51 transition count 94
Discarding 10 places :
Symmetric choice reduction at 3 with 10 rule applications. Total rules 143 place count 41 transition count 74
Iterating global reduction 3 with 10 rules applied. Total rules applied 153 place count 41 transition count 74
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 3 with 4 rules applied. Total rules applied 157 place count 41 transition count 70
Discarding 3 places :
Symmetric choice reduction at 4 with 3 rule applications. Total rules 160 place count 38 transition count 61
Iterating global reduction 4 with 3 rules applied. Total rules applied 163 place count 38 transition count 61
Discarding 3 places :
Symmetric choice reduction at 4 with 3 rule applications. Total rules 166 place count 35 transition count 55
Iterating global reduction 4 with 3 rules applied. Total rules applied 169 place count 35 transition count 55
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Iterating post reduction 4 with 3 rules applied. Total rules applied 172 place count 35 transition count 52
Performed 5 Post agglomeration using F-continuation condition.Transition count delta: -23
Deduced a syphon composed of 5 places in 0 ms
Reduce places removed 5 places and 0 transitions.
Iterating global reduction 5 with 10 rules applied. Total rules applied 182 place count 30 transition count 75
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 5 with 1 rules applied. Total rules applied 183 place count 30 transition count 74
Free-agglomeration rule applied 1 times.
Iterating global reduction 5 with 1 rules applied. Total rules applied 184 place count 30 transition count 73
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 5 with 1 rules applied. Total rules applied 185 place count 29 transition count 73
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 6 with 1 rules applied. Total rules applied 186 place count 29 transition count 72
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 6 with 1 rules applied. Total rules applied 187 place count 28 transition count 72
Partial Free-agglomeration rule applied 8 times.
Drop transitions removed 8 transitions
Iterating global reduction 7 with 8 rules applied. Total rules applied 195 place count 28 transition count 72
Applied a total of 195 rules in 92 ms. Remains 28 /119 variables (removed 91) and now considering 72/227 (removed 155) transitions.
[2023-03-12 19:02:29] [INFO ] Flow matrix only has 62 transitions (discarded 10 similar events)
// Phase 1: matrix 62 rows 28 cols
[2023-03-12 19:02:29] [INFO ] Computed 7 place invariants in 12 ms
[2023-03-12 19:02:29] [INFO ] Dead Transitions using invariants and state equation in 116 ms found 0 transitions.
Finished structural reductions, in 1 iterations. Remains : 28/119 places, 72/227 transitions.
Finished random walk after 1190 steps, including 152 resets, run visited all 4 properties in 76 ms. (steps per millisecond=15 )
Able to resolve query StableMarking after proving 98 properties.
FORMULA StableMarking FALSE TECHNIQUES RANDOM_WALK PARIKH_WALK MARKED_SUFFIX_TEST TRIVIAL_UNMARKED_SCC_TEST BESTFIRST_WALK TOPOLOGICAL
Total runtime 9074 ms.

BK_STOP 1678647749417

--------------------
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
+ [[ StableMarking = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution StableMarking -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ 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
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ 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 StableMarking -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 1800 -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="HealthRecord-PT-04"
export BK_EXAMINATION="StableMarking"
export BK_TOOL="gold2022"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
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 2-5348"
echo " Executing tool gold2022"
echo " Input is HealthRecord-PT-04, examination is StableMarking"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r224-smll-167840362600163"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/HealthRecord-PT-04.tgz
mv HealthRecord-PT-04 execution
cd execution
if [ "StableMarking" = "ReachabilityDeadlock" ] || [ "StableMarking" = "UpperBounds" ] || [ "StableMarking" = "QuasiLiveness" ] || [ "StableMarking" = "StableMarking" ] || [ "StableMarking" = "Liveness" ] || [ "StableMarking" = "OneSafe" ] || [ "StableMarking" = "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 [ "StableMarking" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "StableMarking" != "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 "StableMarking.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property StableMarking.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "StableMarking.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 '' StableMarking.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "StableMarking" = "ReachabilityDeadlock" ] || [ "StableMarking" = "QuasiLiveness" ] || [ "StableMarking" = "StableMarking" ] || [ "StableMarking" = "Liveness" ] || [ "StableMarking" = "OneSafe" ] ; then
echo "FORMULA_NAME StableMarking"
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 ;