fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r063-tajo-167813711600064
Last Updated
May 14, 2023

About the Execution of 2022-gold for BusinessProcesses-PT-08

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
290.132 10106.00 20667.00 85.40 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 normal

Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2023-input.r063-tajo-167813711600064.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2023-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
........................
=====================================================================
Generated by BenchKit 2-5348
Executing tool gold2022
Input is BusinessProcesses-PT-08, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r063-tajo-167813711600064
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 536K
-rw-r--r-- 1 mcc users 6.9K Feb 25 16:44 CTLCardinality.txt
-rw-r--r-- 1 mcc users 74K Feb 25 16:44 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.5K Feb 25 16:42 CTLFireability.txt
-rw-r--r-- 1 mcc users 63K Feb 25 16:42 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.7K Feb 25 15:38 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 25 15:38 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Feb 25 15:38 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 15:38 LTLFireability.xml
-rw-r--r-- 1 mcc users 9.7K Feb 25 16:44 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 101K Feb 25 16:44 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.4K Feb 25 16:44 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 73K Feb 25 16:44 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Feb 25 15:38 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 25 15:38 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 91K 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 positive values
NUM_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-00
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-01
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-02
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-03
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-04
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-05
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-06
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-07
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-08
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-09
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-10
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-11
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-12
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-13
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-14
FORMULA_NAME BusinessProcesses-PT-08-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1678933625499

Running Version 202205111006
[2023-03-16 02:27:06] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -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]
[2023-03-16 02:27:06] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-16 02:27:07] [INFO ] Load time of PNML (sax parser for PT used): 124 ms
[2023-03-16 02:27:07] [INFO ] Transformed 393 places.
[2023-03-16 02:27:07] [INFO ] Transformed 344 transitions.
[2023-03-16 02:27:07] [INFO ] Found NUPN structural information;
[2023-03-16 02:27:07] [INFO ] Parsed PT model containing 393 places and 344 transitions in 262 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 6 ms.
Deduced a syphon composed of 13 places in 4 ms
Reduce places removed 13 places and 13 transitions.
FORMULA BusinessProcesses-PT-08-UpperBounds-01 0 TECHNIQUES TOPOLOGICAL INITIAL_STATE
// Phase 1: matrix 331 rows 380 cols
[2023-03-16 02:27:07] [INFO ] Computed 58 place invariants in 31 ms
Incomplete random walk after 10000 steps, including 84 resets, run finished after 60 ms. (steps per millisecond=166 ) properties (out of 15) seen :9
FORMULA BusinessProcesses-PT-08-UpperBounds-15 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-13 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-12 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-10 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-09 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-08 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-06 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-04 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-00 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 14 resets, run finished after 9 ms. (steps per millisecond=1111 ) properties (out of 6) seen :1
FORMULA BusinessProcesses-PT-08-UpperBounds-05 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10000 steps, including 15 resets, run finished after 9 ms. (steps per millisecond=1111 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 14 resets, run finished after 22 ms. (steps per millisecond=454 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 17 resets, run finished after 8 ms. (steps per millisecond=1250 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 15 resets, run finished after 9 ms. (steps per millisecond=1111 ) properties (out of 5) seen :2
FORMULA BusinessProcesses-PT-08-UpperBounds-14 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-03 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
// Phase 1: matrix 331 rows 380 cols
[2023-03-16 02:27:07] [INFO ] Computed 58 place invariants in 8 ms
[2023-03-16 02:27:07] [INFO ] [Real]Absence check using 44 positive place invariants in 32 ms returned sat
[2023-03-16 02:27:07] [INFO ] [Real]Absence check using 44 positive and 14 generalized place invariants in 3 ms returned sat
[2023-03-16 02:27:07] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-16 02:27:07] [INFO ] [Real]Absence check using state equation in 117 ms returned sat
[2023-03-16 02:27:07] [INFO ] Solution in real domain found non-integer solution.
[2023-03-16 02:27:07] [INFO ] [Nat]Absence check using 44 positive place invariants in 14 ms returned sat
[2023-03-16 02:27:07] [INFO ] [Nat]Absence check using 44 positive and 14 generalized place invariants in 3 ms returned sat
[2023-03-16 02:27:07] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-16 02:27:08] [INFO ] [Nat]Absence check using state equation in 117 ms returned sat
[2023-03-16 02:27:08] [INFO ] Deduced a trap composed of 8 places in 132 ms of which 11 ms to minimize.
[2023-03-16 02:27:08] [INFO ] Deduced a trap composed of 15 places in 97 ms of which 1 ms to minimize.
[2023-03-16 02:27:08] [INFO ] Deduced a trap composed of 17 places in 151 ms of which 1 ms to minimize.
[2023-03-16 02:27:08] [INFO ] Deduced a trap composed of 44 places in 249 ms of which 1 ms to minimize.
[2023-03-16 02:27:08] [INFO ] Deduced a trap composed of 11 places in 273 ms of which 1 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 16 places in 70 ms of which 1 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 23 places in 63 ms of which 0 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 24 places in 55 ms of which 1 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 41 places in 57 ms of which 0 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 42 places in 74 ms of which 0 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 32 places in 42 ms of which 0 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Deduced a trap composed of 63 places in 51 ms of which 0 ms to minimize.
[2023-03-16 02:27:09] [INFO ] Trap strengthening (SAT) tested/added 13/12 trap constraints in 1507 ms
[2023-03-16 02:27:09] [INFO ] Computed and/alt/rep : 305/374/305 causal constraints (skipped 25 transitions) in 26 ms.
[2023-03-16 02:27:10] [INFO ] Added : 229 causal constraints over 46 iterations in 964 ms. Result :sat
Minimization took 51 ms.
[2023-03-16 02:27:10] [INFO ] [Real]Absence check using 44 positive place invariants in 18 ms returned sat
[2023-03-16 02:27:10] [INFO ] [Real]Absence check using 44 positive and 14 generalized place invariants in 4 ms returned sat
[2023-03-16 02:27:10] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-16 02:27:10] [INFO ] [Real]Absence check using state equation in 181 ms returned sat
[2023-03-16 02:27:10] [INFO ] Solution in real domain found non-integer solution.
[2023-03-16 02:27:11] [INFO ] [Nat]Absence check using 44 positive place invariants in 19 ms returned sat
[2023-03-16 02:27:11] [INFO ] [Nat]Absence check using 44 positive and 14 generalized place invariants in 39 ms returned sat
[2023-03-16 02:27:11] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-16 02:27:11] [INFO ] [Nat]Absence check using state equation in 196 ms returned sat
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 49 places in 125 ms of which 12 ms to minimize.
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 11 places in 142 ms of which 1 ms to minimize.
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 17 places in 95 ms of which 1 ms to minimize.
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 19 places in 83 ms of which 0 ms to minimize.
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 29 places in 52 ms of which 0 ms to minimize.
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 24 places in 40 ms of which 0 ms to minimize.
[2023-03-16 02:27:11] [INFO ] Deduced a trap composed of 33 places in 60 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 29 places in 48 ms of which 1 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 44 places in 48 ms of which 1 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 28 places in 49 ms of which 1 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 41 places in 48 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 50 places in 46 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 40 places in 34 ms of which 1 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 37 places in 50 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 39 places in 49 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 54 places in 53 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 61 places in 51 ms of which 0 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Deduced a trap composed of 54 places in 53 ms of which 1 ms to minimize.
[2023-03-16 02:27:12] [INFO ] Trap strengthening (SAT) tested/added 19/18 trap constraints in 1367 ms
[2023-03-16 02:27:12] [INFO ] Computed and/alt/rep : 305/374/305 causal constraints (skipped 25 transitions) in 36 ms.
[2023-03-16 02:27:13] [INFO ] Deduced a trap composed of 94 places in 70 ms of which 0 ms to minimize.
[2023-03-16 02:27:13] [INFO ] Deduced a trap composed of 92 places in 70 ms of which 0 ms to minimize.
[2023-03-16 02:27:13] [INFO ] Deduced a trap composed of 96 places in 56 ms of which 1 ms to minimize.
[2023-03-16 02:27:13] [INFO ] Trap strengthening (SAT) tested/added 4/3 trap constraints in 260 ms
[2023-03-16 02:27:13] [INFO ] Added : 197 causal constraints over 41 iterations in 908 ms. Result :sat
Minimization took 52 ms.
[2023-03-16 02:27:13] [INFO ] [Real]Absence check using 44 positive place invariants in 12 ms returned sat
[2023-03-16 02:27:13] [INFO ] [Real]Absence check using 44 positive and 14 generalized place invariants in 18 ms returned sat
[2023-03-16 02:27:13] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-16 02:27:13] [INFO ] [Real]Absence check using state equation in 162 ms returned sat
[2023-03-16 02:27:13] [INFO ] Solution in real domain found non-integer solution.
[2023-03-16 02:27:14] [INFO ] [Nat]Absence check using 44 positive place invariants in 19 ms returned sat
[2023-03-16 02:27:14] [INFO ] [Nat]Absence check using 44 positive and 14 generalized place invariants in 99 ms returned sat
[2023-03-16 02:27:14] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-16 02:27:14] [INFO ] [Nat]Absence check using state equation in 136 ms returned sat
[2023-03-16 02:27:14] [INFO ] Deduced a trap composed of 11 places in 63 ms of which 0 ms to minimize.
[2023-03-16 02:27:14] [INFO ] Deduced a trap composed of 15 places in 36 ms of which 4 ms to minimize.
[2023-03-16 02:27:14] [INFO ] Deduced a trap composed of 26 places in 43 ms of which 1 ms to minimize.
[2023-03-16 02:27:14] [INFO ] Deduced a trap composed of 22 places in 35 ms of which 0 ms to minimize.
[2023-03-16 02:27:14] [INFO ] Deduced a trap composed of 24 places in 40 ms of which 1 ms to minimize.
[2023-03-16 02:27:14] [INFO ] Trap strengthening (SAT) tested/added 6/5 trap constraints in 286 ms
[2023-03-16 02:27:14] [INFO ] Computed and/alt/rep : 305/374/305 causal constraints (skipped 25 transitions) in 19 ms.
[2023-03-16 02:27:15] [INFO ] Added : 199 causal constraints over 41 iterations in 795 ms. Result :sat
Minimization took 49 ms.
Current structural bounds on expressions (after SMT) : [1, 1, 1] Max seen :[0, 0, 0]
FORMULA BusinessProcesses-PT-08-UpperBounds-11 1 TECHNIQUES TOPOLOGICAL PARIKH_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-02 1 TECHNIQUES TOPOLOGICAL PARIKH_WALK
FORMULA BusinessProcesses-PT-08-UpperBounds-07 1 TECHNIQUES TOPOLOGICAL PARIKH_WALK
All properties solved without resorting to model-checking.
Total runtime 8768 ms.

BK_STOP 1678933635605

--------------------
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
+ [[ UpperBounds = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution UpperBounds -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 UpperBounds -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="BusinessProcesses-PT-08"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="gold2022"
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 2-5348"
echo " Executing tool gold2022"
echo " Input is BusinessProcesses-PT-08, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r063-tajo-167813711600064"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BusinessProcesses-PT-08.tgz
mv BusinessProcesses-PT-08 execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "UpperBounds.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 '' UpperBounds.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;