fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r435-tajo-167905984000067
Last Updated
May 14, 2023

About the Execution of ITS-Tools for ShieldRVs-PT-020B

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
282.060 5442.00 13433.00 74.80 T 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.r435-tajo-167905984000067.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 itstools
Input is ShieldRVs-PT-020B, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r435-tajo-167905984000067
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 744K
-rw-r--r-- 1 mcc users 6.4K Feb 26 18:19 CTLCardinality.txt
-rw-r--r-- 1 mcc users 69K Feb 26 18:19 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.4K Feb 26 18:19 CTLFireability.txt
-rw-r--r-- 1 mcc users 64K Feb 26 18:19 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.6K Feb 25 17:02 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 25 17:02 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Feb 25 17:02 LTLFireability.txt
-rw-r--r-- 1 mcc users 15K Feb 25 17:02 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Feb 26 18:20 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 148K Feb 26 18:20 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Feb 26 18:20 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 94K Feb 26 18:20 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:02 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 17:02 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 244K Mar 5 18:23 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 QuasiLiveness

=== Now, execution of the tool begins

BK_START 1679501765926

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=QuasiLiveness
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=ShieldRVs-PT-020B
Not applying reductions.
Model is PT
QuasiLiveness PT
Running Version 202303021504
[2023-03-22 16:16:07] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, QuasiLiveness, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2023-03-22 16:16:07] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-22 16:16:07] [INFO ] Load time of PNML (sax parser for PT used): 92 ms
[2023-03-22 16:16:07] [INFO ] Transformed 803 places.
[2023-03-22 16:16:07] [INFO ] Transformed 903 transitions.
[2023-03-22 16:16:07] [INFO ] Found NUPN structural information;
[2023-03-22 16:16:07] [INFO ] Parsed PT model containing 803 places and 903 transitions and 2880 arcs in 199 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 803/803 places, 903/903 transitions.
Drop transitions removed 81 transitions
Trivial Post-agglo rules discarded 81 transitions
Performed 81 trivial Post agglomeration. Transition count delta: 81
Iterating post reduction 0 with 81 rules applied. Total rules applied 81 place count 803 transition count 822
Reduce places removed 81 places and 0 transitions.
Iterating post reduction 1 with 81 rules applied. Total rules applied 162 place count 722 transition count 822
Performed 100 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 100 Pre rules applied. Total rules applied 162 place count 722 transition count 722
Deduced a syphon composed of 100 places in 5 ms
Reduce places removed 100 places and 0 transitions.
Iterating global reduction 2 with 200 rules applied. Total rules applied 362 place count 622 transition count 722
Performed 320 Post agglomeration using F-continuation condition.Transition count delta: 320
Deduced a syphon composed of 320 places in 3 ms
Reduce places removed 320 places and 0 transitions.
Iterating global reduction 2 with 640 rules applied. Total rules applied 1002 place count 302 transition count 402
Renaming transitions due to excessive name length > 1024 char.
Applied a total of 1002 rules in 131 ms. Remains 302 /803 variables (removed 501) and now considering 402/903 (removed 501) transitions.
// Phase 1: matrix 402 rows 302 cols
[2023-03-22 16:16:08] [INFO ] Computed 81 place invariants in 18 ms
[2023-03-22 16:16:08] [INFO ] Implicit Places using invariants in 410 ms returned []
[2023-03-22 16:16:08] [INFO ] Invariant cache hit.
[2023-03-22 16:16:08] [INFO ] Implicit Places using invariants and state equation in 399 ms returned []
Implicit Place search using SMT with State Equation took 846 ms to find 0 implicit places.
[2023-03-22 16:16:08] [INFO ] Invariant cache hit.
[2023-03-22 16:16:09] [INFO ] Dead Transitions using invariants and state equation in 248 ms found 0 transitions.
Starting structural reductions in LIVENESS mode, iteration 1 : 302/803 places, 402/903 transitions.
Finished structural reductions in LIVENESS mode , in 1 iterations and 1227 ms. Remains : 302/803 places, 402/903 transitions.
Discarding 120 transitions out of 402. Remains 282
Initial state reduction rules removed 1 formulas.
[2023-03-22 16:16:09] [INFO ] Flatten gal took : 102 ms
[2023-03-22 16:16:09] [INFO ] Flatten gal took : 43 ms
[2023-03-22 16:16:09] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality9887337369316899855.gal : 30 ms
[2023-03-22 16:16:09] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality8811782653241103238.prop : 9 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202303021504/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality9887337369316899855.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality8811782653241103238.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202303021504/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...328
Loading property file /tmp/ReachabilityCardinality8811782653241103238.prop.
Incomplete random walk after 10000 steps, including 36 resets, run finished after 690 ms. (steps per millisecond=14 ) properties (out of 281) seen :277
Incomplete Best-First random walk after 10001 steps, including 4 resets, run finished after 49 ms. (steps per millisecond=204 ) properties (out of 4) seen :1
Incomplete Best-First random walk after 10001 steps, including 4 resets, run finished after 28 ms. (steps per millisecond=357 ) properties (out of 3) seen :2
Running SMT prover for 1 properties.
[2023-03-22 16:16:09] [INFO ] Invariant cache hit.
Reachability property qltransition_388 is true.
Reachability property qltransition_138 is true.
SDD proceeding with computation,279 properties remain. new max is 2
SDD size :3 after 5
Reachability property qltransition_374 is true.
Reachability property qltransition_361 is true.
SDD proceeding with computation,277 properties remain. new max is 2
SDD size :5 after 8
Reachability property qltransition_348 is true.
SDD proceeding with computation,276 properties remain. new max is 2
SDD size :8 after 11
Reachability property qltransition_335 is true.
Reachability property qltransition_322 is true.
SDD proceeding with computation,274 properties remain. new max is 2
SDD size :11 after 14
Reachability property qltransition_309 is true.
SDD proceeding with computation,273 properties remain. new max is 2
SDD size :14 after 17
Reachability property qltransition_296 is true.
Reachability property qltransition_283 is true.
SDD proceeding with computation,271 properties remain. new max is 2
SDD size :17 after 20
Reachability property qltransition_270 is true.
SDD proceeding with computation,270 properties remain. new max is 2
SDD size :20 after 23
[2023-03-22 16:16:10] [INFO ] [Real]Absence check using 81 positive place invariants in 18 ms returned sat
Reachability property qltransition_257 is true.
Reachability property qltransition_244 is true.
SDD proceeding with computation,268 properties remain. new max is 2
SDD size :23 after 26
Reachability property qltransition_231 is true.
SDD proceeding with computation,267 properties remain. new max is 2
SDD size :26 after 29
Reachability property qltransition_218 is true.
Reachability property qltransition_205 is true.
SDD proceeding with computation,265 properties remain. new max is 2
SDD size :29 after 32
Reachability property qltransition_192 is true.
SDD proceeding with computation,264 properties remain. new max is 2
SDD size :32 after 35
Reachability property qltransition_179 is true.
Reachability property qltransition_166 is true.
SDD proceeding with computation,262 properties remain. new max is 2
SDD size :35 after 38
Reachability property qltransition_153 is true.
SDD proceeding with computation,261 properties remain. new max is 2
SDD size :38 after 41
[2023-03-22 16:16:10] [INFO ] After 261ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
Reachability property qltransition_148 is true.
Reachability property qltransition_143 is true.
SDD proceeding with computation,259 properties remain. new max is 2
SDD size :41 after 43
Reachability property qltransition_161 is true.
Reachability property qltransition_146 is true.
SDD proceeding with computation,257 properties remain. new max is 2
SDD size :43 after 48
Reachability property qltransition_144 is true.
Reachability property qltransition_142 is true.
Reachability property qltransition_139 is true.
Reachability property qltransition_118 is true.
SDD proceeding with computation,253 properties remain. new max is 2
SDD size :48 after 55
Reachability property qltransition_141 is true.
SDD proceeding with computation,252 properties remain. new max is 2
SDD size :55 after 60
SDD proceeding with computation,252 properties remain. new max is 4
SDD size :60 after 62
[2023-03-22 16:16:10] [INFO ] [Nat]Absence check using 81 positive place invariants in 10 ms returned sat
Reachability property qltransition_147 is true.
SDD proceeding with computation,251 properties remain. new max is 4
SDD size :62 after 74
SDD proceeding with computation,251 properties remain. new max is 8
SDD size :74 after 77
Reachability property qltransition_159 is true.
SDD proceeding with computation,250 properties remain. new max is 8
SDD size :77 after 148
SDD proceeding with computation,250 properties remain. new max is 16
SDD size :148 after 169
[2023-03-22 16:16:10] [INFO ] After 105ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
Reachability property qltransition_174 is true.
Reachability property qltransition_157 is true.
Reachability property qltransition_152 is true.
Reachability property qltransition_140 is true.
Reachability property qltransition_119 is true.
SDD proceeding with computation,245 properties remain. new max is 16
SDD size :169 after 425
[2023-03-22 16:16:10] [INFO ] Deduced a trap composed of 6 places in 82 ms of which 4 ms to minimize.
Reachability property qltransition_156 is true.
Reachability property qltransition_155 is true.
Reachability property qltransition_154 is true.
Reachability property qltransition_151 is true.
SDD proceeding with computation,241 properties remain. new max is 16
SDD size :425 after 678
SDD proceeding with computation,241 properties remain. new max is 32
SDD size :678 after 725
Reachability property qltransition_149 is true.
Reachability property qltransition_145 is true.
SDD proceeding with computation,239 properties remain. new max is 32
SDD size :725 after 865
[2023-03-22 16:16:10] [INFO ] Deduced a trap composed of 6 places in 47 ms of which 0 ms to minimize.
SDD proceeding with computation,239 properties remain. new max is 64
SDD size :865 after 1140
Reachability property qltransition_172 is true.
Reachability property qltransition_160 is true.
SDD proceeding with computation,237 properties remain. new max is 64
SDD size :1140 after 5633
SDD proceeding with computation,237 properties remain. new max is 128
SDD size :5633 after 7185
[2023-03-22 16:16:10] [INFO ] Deduced a trap composed of 6 places in 53 ms of which 0 ms to minimize.
SDD proceeding with computation,237 properties remain. new max is 256
SDD size :7185 after 8841
[2023-03-22 16:16:10] [INFO ] Deduced a trap composed of 6 places in 27 ms of which 1 ms to minimize.
Reachability property qltransition_187 is true.
Reachability property qltransition_170 is true.
Reachability property qltransition_169 is true.
Reachability property qltransition_168 is true.
Reachability property qltransition_167 is true.
Reachability property qltransition_165 is true.
Reachability property qltransition_164 is true.
Reachability property qltransition_162 is true.
Reachability property qltransition_158 is true.
Reachability property qltransition_150 is true.
Reachability property qltransition_120 is true.
SDD proceeding with computation,226 properties remain. new max is 256
SDD size :8841 after 66335
[2023-03-22 16:16:10] [INFO ] Deduced a trap composed of 6 places in 24 ms of which 0 ms to minimize.
[2023-03-22 16:16:10] [INFO ] Trap strengthening (SAT) tested/added 6/5 trap constraints in 309 ms
[2023-03-22 16:16:10] [INFO ] After 425ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
SDD proceeding with computation,226 properties remain. new max is 512
SDD size :66335 after 101874
Minimization took 12 ms.
[2023-03-22 16:16:10] [INFO ] After 533ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Reachability property qltransition_200 is true.
Reachability property qltransition_185 is true.
Reachability property qltransition_183 is true.
Reachability property qltransition_182 is true.
Reachability property qltransition_181 is true.
Reachability property qltransition_180 is true.
Reachability property qltransition_178 is true.
Reachability property qltransition_177 is true.
Reachability property qltransition_173 is true.
Reachability property qltransition_163 is true.
Reachability property qltransition_121 is true.
SDD proceeding with computation,215 properties remain. new max is 512
SDD size :101874 after 5.06593e+06
Parikh walk visited 0 properties in 83 ms.
Support contains 3 out of 302 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 302/302 places, 402/402 transitions.
Reachability property qltransition_175 is true.
Reachability property qltransition_171 is true.
SDD proceeding with computation,213 properties remain. new max is 512
SDD size :5.06593e+06 after 6.4787e+06
Discarding 20 places :
Symmetric choice reduction at 0 with 20 rule applications. Total rules 20 place count 282 transition count 382
Iterating global reduction 0 with 20 rules applied. Total rules applied 40 place count 282 transition count 382
Partial Free-agglomeration rule applied 42 times.
Drop transitions removed 42 transitions
Iterating global reduction 0 with 42 rules applied. Total rules applied 82 place count 282 transition count 382
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 83 place count 281 transition count 381
SDD proceeding with computation,213 properties remain. new max is 1024
SDD size :6.4787e+06 after 1.07309e+07
Applied a total of 83 rules in 83 ms. Remains 281 /302 variables (removed 21) and now considering 381/402 (removed 21) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 83 ms. Remains : 281/302 places, 381/402 transitions.
Finished random walk after 2397 steps, including 9 resets, run visited all 1 properties in 10 ms. (steps per millisecond=239 )
ITS runner failed with exception null
java.lang.InterruptedException
at java.base/java.lang.Object.wait(Native Method)
at java.base/java.lang.Thread.join(Thread.java:1304)
at java.base/java.lang.Thread.join(Thread.java:1372)
at fr.lip6.move.gal.application.runner.AbstractRunner.join(AbstractRunner.java:27)
at fr.lip6.move.gal.application.runner.its.ITSRunner.join(ITSRunner.java:177)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.verifyWithSDD(GlobalPropertySolver.java:675)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.lambda$2(ReachabilitySolver.java:63)
at java.base/java.lang.Thread.run(Thread.java:833)
Able to resolve query QuasiLiveness after proving 282 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK BESTFIRST_WALK TOPOLOGICAL INITIAL_STATE
Total runtime 3286 ms.
Reachability property qltransition_213 is true.
Reachability property qltransition_198 is true.
Reachability property qltransition_196 is true.
Reachability property qltransition_195 is true.
Reachability property qltransition_194 is true.
Reachability property qltransition_193 is true.
Reachability property qltransition_191 is true.
Reachability property qltransition_190 is true.
Reachability property qltransition_188 is true.
Reachability property qltransition_186 is true.
Reachability property qltransition_184 is true.
Reachability property qltransition_176 is true.
Reachability property qltransition_122 is true.
SDD proceeding with computation,200 properties remain. new max is 1024
SDD size :1.07309e+07 after 5.76598e+08

BK_STOP 1679501771368

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ QuasiLiveness = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800

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="ShieldRVs-PT-020B"
export BK_EXAMINATION="QuasiLiveness"
export BK_TOOL="itstools"
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 itstools"
echo " Input is ShieldRVs-PT-020B, examination is QuasiLiveness"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r435-tajo-167905984000067"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ShieldRVs-PT-020B.tgz
mv ShieldRVs-PT-020B execution
cd execution
if [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "UpperBounds" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] || [ "QuasiLiveness" = "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 [ "QuasiLiveness" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "QuasiLiveness" != "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 "QuasiLiveness.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property QuasiLiveness.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "QuasiLiveness.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 '' QuasiLiveness.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] ; then
echo "FORMULA_NAME QuasiLiveness"
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 ;