fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r051-tajo-167813704000398
Last Updated
May 14, 2023

About the Execution of ITS-Tools for CANConstruction-PT-030

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
1550.880 50657.00 115860.00 80.90 F 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.r051-tajo-167813704000398.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 CANConstruction-PT-030, examination is StableMarking
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r051-tajo-167813704000398
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.9M
-rw-r--r-- 1 mcc users 13K Feb 25 21:34 CTLCardinality.txt
-rw-r--r-- 1 mcc users 111K Feb 25 21:34 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.2K Feb 25 21:20 CTLFireability.txt
-rw-r--r-- 1 mcc users 45K Feb 25 21:20 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.5K Feb 25 15:40 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 25 15:40 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Feb 25 15:40 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 15:40 LTLFireability.xml
-rw-r--r-- 1 mcc users 16K Feb 25 21:38 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 125K Feb 25 21:38 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 15K Feb 25 21:36 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 98K Feb 25 21:36 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Feb 25 15:40 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Feb 25 15:40 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 1.4M 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 1678998497843

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=StableMarking
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=CANConstruction-PT-030
Not applying reductions.
Model is PT
StableMarking PT
Running Version 202303021504
[2023-03-16 20:28:19] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, StableMarking, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2023-03-16 20:28:19] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-16 20:28:19] [INFO ] Load time of PNML (sax parser for PT used): 137 ms
[2023-03-16 20:28:19] [INFO ] Transformed 2162 places.
[2023-03-16 20:28:19] [INFO ] Transformed 3840 transitions.
[2023-03-16 20:28:19] [INFO ] Parsed PT model containing 2162 places and 3840 transitions and 11400 arcs in 259 ms.
[2023-03-16 20:28:20] [INFO ] Flatten gal took : 526 ms
[2023-03-16 20:28:21] [INFO ] Flatten gal took : 206 ms
[2023-03-16 20:28:21] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality10955414615659113601.gal : 96 ms
[2023-03-16 20:28:21] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality1224584206914564927.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/ReachabilityCardinality10955414615659113601.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality1224584206914564927.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 ...329
Incomplete random walk after 10000 steps, including 18 resets, run finished after 1706 ms. (steps per millisecond=5 ) properties (out of 2162) seen :1623
Running SMT prover for 539 properties.
// Phase 1: matrix 3840 rows 2162 cols
[2023-03-16 20:28:21] [INFO ] Computed 61 place invariants in 66 ms
Loading property file /tmp/ReachabilityCardinality1224584206914564927.prop.
Invariant property smplace_410 does not hold.
Invariant property smplace_409 does not hold.
Invariant property smplace_408 does not hold.
Invariant property smplace_395 does not hold.
Invariant property smplace_394 does not hold.
Invariant property smplace_381 does not hold.
Invariant property smplace_380 does not hold.
Invariant property smplace_367 does not hold.
Invariant property smplace_366 does not hold.
Invariant property smplace_353 does not hold.
Invariant property smplace_352 does not hold.
Invariant property smplace_339 does not hold.
Invariant property smplace_338 does not hold.
Invariant property smplace_325 does not hold.
Invariant property smplace_324 does not hold.
Invariant property smplace_311 does not hold.
Invariant property smplace_310 does not hold.
Invariant property smplace_297 does not hold.
Invariant property smplace_296 does not hold.
Invariant property smplace_283 does not hold.
Invariant property smplace_282 does not hold.
Invariant property smplace_269 does not hold.
Invariant property smplace_268 does not hold.
Invariant property smplace_255 does not hold.
Invariant property smplace_254 does not hold.
Invariant property smplace_241 does not hold.
Invariant property smplace_240 does not hold.
Invariant property smplace_227 does not hold.
Invariant property smplace_226 does not hold.
Invariant property smplace_213 does not hold.
Invariant property smplace_212 does not hold.
Invariant property smplace_199 does not hold.
Invariant property smplace_198 does not hold.
Invariant property smplace_185 does not hold.
Invariant property smplace_184 does not hold.
Invariant property smplace_171 does not hold.
Invariant property smplace_170 does not hold.
Invariant property smplace_157 does not hold.
Invariant property smplace_156 does not hold.
Invariant property smplace_143 does not hold.
Invariant property smplace_142 does not hold.
Invariant property smplace_129 does not hold.
Invariant property smplace_128 does not hold.
Invariant property smplace_115 does not hold.
Invariant property smplace_114 does not hold.
Invariant property smplace_101 does not hold.
Invariant property smplace_100 does not hold.
Invariant property smplace_87 does not hold.
Invariant property smplace_86 does not hold.
Invariant property smplace_73 does not hold.
Invariant property smplace_72 does not hold.
Invariant property smplace_59 does not hold.
Invariant property smplace_58 does not hold.
Invariant property smplace_45 does not hold.
Invariant property smplace_44 does not hold.
Invariant property smplace_31 does not hold.
Invariant property smplace_30 does not hold.
Invariant property smplace_17 does not hold.
Invariant property smplace_16 does not hold.
Invariant property smplace_3 does not hold.
Invariant property smplace_2 does not hold.
Invariant property smplace_1 does not hold.
SDD proceeding with computation,2100 properties remain. new max is 2
SDD size :1 after 32
Invariant property smplace_396 does not hold.
SDD proceeding with computation,2099 properties remain. new max is 2
SDD size :32 after 33
Invariant property smplace_382 does not hold.
SDD proceeding with computation,2098 properties remain. new max is 2
SDD size :33 after 34
Invariant property smplace_368 does not hold.
SDD proceeding with computation,2097 properties remain. new max is 2
SDD size :34 after 35
Invariant property smplace_354 does not hold.
SDD proceeding with computation,2096 properties remain. new max is 2
SDD size :35 after 36
Invariant property smplace_340 does not hold.
SDD proceeding with computation,2095 properties remain. new max is 2
SDD size :36 after 37
Invariant property smplace_326 does not hold.
SDD proceeding with computation,2094 properties remain. new max is 2
SDD size :37 after 38
Invariant property smplace_312 does not hold.
SDD proceeding with computation,2093 properties remain. new max is 2
SDD size :38 after 39
Invariant property smplace_298 does not hold.
SDD proceeding with computation,2092 properties remain. new max is 2
SDD size :39 after 40
Invariant property smplace_284 does not hold.
SDD proceeding with computation,2091 properties remain. new max is 2
SDD size :40 after 41
Invariant property smplace_270 does not hold.
SDD proceeding with computation,2090 properties remain. new max is 2
SDD size :41 after 42
Invariant property smplace_256 does not hold.
SDD proceeding with computation,2089 properties remain. new max is 2
SDD size :42 after 43
Invariant property smplace_242 does not hold.
SDD proceeding with computation,2088 properties remain. new max is 2
SDD size :43 after 44
Invariant property smplace_228 does not hold.
SDD proceeding with computation,2087 properties remain. new max is 2
SDD size :44 after 45
[2023-03-16 20:28:41] [INFO ] After 19411ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:539
Invariant property smplace_214 does not hold.
SDD proceeding with computation,2086 properties remain. new max is 2
SDD size :45 after 46
Invariant property smplace_200 does not hold.
SDD proceeding with computation,2085 properties remain. new max is 2
SDD size :46 after 47
Invariant property smplace_186 does not hold.
SDD proceeding with computation,2084 properties remain. new max is 2
SDD size :47 after 48
Invariant property smplace_172 does not hold.
SDD proceeding with computation,2083 properties remain. new max is 2
SDD size :48 after 49
Invariant property smplace_158 does not hold.
SDD proceeding with computation,2082 properties remain. new max is 2
SDD size :49 after 50
[2023-03-16 20:28:53] [INFO ] [Nat]Absence check using 31 positive place invariants in 64 ms returned sat
[2023-03-16 20:28:53] [INFO ] [Nat]Absence check using 31 positive and 30 generalized place invariants in 19 ms returned sat
Invariant property smplace_144 does not hold.
SDD proceeding with computation,2081 properties remain. new max is 2
SDD size :50 after 51
Invariant property smplace_130 does not hold.
SDD proceeding with computation,2080 properties remain. new max is 2
SDD size :51 after 52
Invariant property smplace_116 does not hold.
SDD proceeding with computation,2079 properties remain. new max is 2
SDD size :52 after 53
Invariant property smplace_102 does not hold.
SDD proceeding with computation,2078 properties remain. new max is 2
SDD size :53 after 54
Invariant property smplace_88 does not hold.
SDD proceeding with computation,2077 properties remain. new max is 2
SDD size :54 after 55
Invariant property smplace_74 does not hold.
SDD proceeding with computation,2076 properties remain. new max is 2
SDD size :55 after 56
[2023-03-16 20:29:06] [INFO ] After 1116ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :539
[2023-03-16 20:29:06] [INFO ] State equation strengthened by 1770 read => feed constraints.
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:251)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:642)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMTIncremental(DeadlockTester.java:350)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMT(DeadlockTester.java:223)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.applyReductions(ReachabilitySolver.java:95)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.applyReachabilitySolver(GlobalPropertySolver.java:724)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.solveProperty(GlobalPropertySolver.java:558)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.preSolveLiveness(GlobalPropertySolver.java:412)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.preStableMarking(GlobalPropertySolver.java:321)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.solveProperty(GlobalPropertySolver.java:294)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:386)
at fr.lip6.move.gal.application.Application.start(Application.java:178)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
at org.eclipse.equinox.launcher.Main.main(Main.java:1440)
[2023-03-16 20:29:06] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2023-03-16 20:29:06] [INFO ] After 25070ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :0 real:539
Fused 539 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 511 out of 2162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 2162/2162 places, 3840/3840 transitions.
Drop transitions removed 178 transitions
Trivial Post-agglo rules discarded 178 transitions
Performed 178 trivial Post agglomeration. Transition count delta: 178
Iterating post reduction 0 with 178 rules applied. Total rules applied 178 place count 2162 transition count 3662
Reduce places removed 178 places and 0 transitions.
Iterating post reduction 1 with 178 rules applied. Total rules applied 356 place count 1984 transition count 3662
Discarding 592 places :
Symmetric choice reduction at 2 with 592 rule applications. Total rules 948 place count 1392 transition count 2478
Iterating global reduction 2 with 592 rules applied. Total rules applied 1540 place count 1392 transition count 2478
Performed 30 Post agglomeration using F-continuation condition.Transition count delta: 30
Deduced a syphon composed of 30 places in 2 ms
Reduce places removed 30 places and 0 transitions.
Iterating global reduction 2 with 60 rules applied. Total rules applied 1600 place count 1362 transition count 2448
Invariant property smplace_60 does not hold.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: -25
Deduced a syphon composed of 2 places in 1 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 2 with 4 rules applied. Total rules applied 1604 place count 1360 transition count 2473
SDD proceeding with computation,2075 properties remain. new max is 2
SDD size :56 after 57
Free-agglomeration rule (complex) applied 15 times.
Iterating global reduction 2 with 15 rules applied. Total rules applied 1619 place count 1360 transition count 2458
Reduce places removed 15 places and 0 transitions.
Iterating post reduction 2 with 15 rules applied. Total rules applied 1634 place count 1345 transition count 2458
Partial Free-agglomeration rule applied 56 times.
Drop transitions removed 56 transitions
Iterating global reduction 3 with 56 rules applied. Total rules applied 1690 place count 1345 transition count 2458
Applied a total of 1690 rules in 605 ms. Remains 1345 /2162 variables (removed 817) and now considering 2458/3840 (removed 1382) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 606 ms. Remains : 1345/2162 places, 2458/3840 transitions.
Finished random walk after 26699 steps, including 120 resets, run visited all 510 properties in 793 ms. (steps per millisecond=33 )
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 StableMarking after proving 2162 properties.
FORMULA StableMarking FALSE TECHNIQUES RANDOM_WALK DECISION_DIAGRAMS COLLATERAL_PROCESSING TOPOLOGICAL
Total runtime 48593 ms.

BK_STOP 1678998548500

--------------------
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
+ [[ StableMarking = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution StableMarking -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 StableMarking -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="CANConstruction-PT-030"
export BK_EXAMINATION="StableMarking"
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 CANConstruction-PT-030, 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 r051-tajo-167813704000398"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CANConstruction-PT-030.tgz
mv CANConstruction-PT-030 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 ;