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.r490-tall-167912708400258.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)
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=====================================================================
Generated by BenchKit 2-5348
Executing tool marciexred
Input is Sudoku-PT-AN13, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r490-tall-167912708400258
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 58M
-rw-r--r-- 1 mcc users 806K Feb 26 09:29 CTLCardinality.txt
-rw-r--r-- 1 mcc users 3.6M Feb 26 09:29 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6M Feb 26 08:46 CTLFireability.txt
-rw-r--r-- 1 mcc users 13M Feb 26 08:46 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.6K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 399K Feb 25 17:17 LTLCardinality.txt
-rw-r--r-- 1 mcc users 1.3M Feb 25 17:17 LTLCardinality.xml
-rw-r--r-- 1 mcc users 934K Feb 25 17:17 LTLFireability.txt
-rw-r--r-- 1 mcc users 3.3M Feb 25 17:17 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.2M Feb 26 10:13 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 5.5M Feb 26 10:13 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 4.3M Feb 26 09:35 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 21M Feb 26 09:34 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 49K Feb 25 17:17 UpperBounds.txt
-rw-r--r-- 1 mcc users 120K Feb 25 17:17 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 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 1.2M 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

here is the order used to build the result vector(from text file)
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-00
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-01
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-02
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-03
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-04
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-05
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-06
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-07
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-08
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-09
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-10
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-11
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-12
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-13
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-14
FORMULA_NAME Sudoku-PT-AN13-CTLFireability-15

=== Now, execution of the tool begins

BK_START 1679222879222

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=marciexred
BK_EXAMINATION=CTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Sudoku-PT-AN13
Applying reductions before tool marcie
Invoking reducer
Running Version 202303021504
[2023-03-19 10:48:00] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLFireability, -timeout, 360, -rebuildPNML]
[2023-03-19 10:48:00] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-19 10:48:00] [INFO ] Load time of PNML (sax parser for PT used): 221 ms
[2023-03-19 10:48:00] [INFO ] Transformed 2704 places.
[2023-03-19 10:48:00] [INFO ] Transformed 2197 transitions.
[2023-03-19 10:48:00] [INFO ] Parsed PT model containing 2704 places and 2197 transitions and 8788 arcs in 323 ms.
Parsed 16 properties from file /home/mcc/execution/CTLFireability.xml in 248 ms.
Support contains 507 out of 2704 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 2704/2704 places, 2197/2197 transitions.
Reduce places removed 2197 places and 0 transitions.
Iterating post reduction 0 with 2197 rules applied. Total rules applied 2197 place count 507 transition count 2197
Applied a total of 2197 rules in 70 ms. Remains 507 /2704 variables (removed 2197) and now considering 2197/2197 (removed 0) transitions.
// Phase 1: matrix 2197 rows 507 cols
[2023-03-19 10:48:07] [INFO ] Computed 38 place invariants in 131 ms
[2023-03-19 10:48:07] [INFO ] Implicit Places using invariants in 406 ms returned []
[2023-03-19 10:48:07] [INFO ] Invariant cache hit.
[2023-03-19 10:48:08] [INFO ] Implicit Places using invariants and state equation in 793 ms returned []
Implicit Place search using SMT with State Equation took 1224 ms to find 0 implicit places.
[2023-03-19 10:48:08] [INFO ] Invariant cache hit.
[2023-03-19 10:48:08] [INFO ] Dead Transitions using invariants and state equation in 731 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 507/2704 places, 2197/2197 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 2029 ms. Remains : 507/2704 places, 2197/2197 transitions.
Support contains 507 out of 507 places after structural reductions.
[2023-03-19 10:48:11] [INFO ] Flatten gal took : 866 ms
[2023-03-19 10:48:21] [INFO ] Flatten gal took : 1048 ms
[2023-03-19 10:48:31] [INFO ] Input system was already deterministic with 2197 transitions.
Incomplete random walk after 10000 steps, including 67 resets, run finished after 1550 ms. (steps per millisecond=6 ) properties (out of 55) seen :54
Interrupted Best-First random walk after 5361 steps, including 1 resets, run timeout after 5767 ms. (steps per millisecond=0 ) properties seen 0
Running SMT prover for 1 properties.
[2023-03-19 10:48:39] [INFO ] Invariant cache hit.
[2023-03-19 10:48:51] [INFO ] After 1330ms SMT Verify possible using all constraints in real domain returned unsat :1 sat :0
Fused 1 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
Successfully simplified 1 atomic propositions for a total of 16 simplifications.
[2023-03-19 10:48:55] [INFO ] Flatten gal took : 702 ms
[2023-03-19 10:49:05] [INFO ] Flatten gal took : 1010 ms
[2023-03-19 10:49:14] [INFO ] Input system was already deterministic with 2197 transitions.
Computed a total of 507 stabilizing places and 2197 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 507 transition count 2197
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
AF dead knowledge conclusive for 1 formulas.
FORMULA Sudoku-PT-AN13-CTLFireability-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 4 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 5 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:17] [INFO ] Flatten gal took : 156 ms
[2023-03-19 10:49:18] [INFO ] Flatten gal took : 221 ms
[2023-03-19 10:49:18] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 5 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 5 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:18] [INFO ] Flatten gal took : 122 ms
[2023-03-19 10:49:19] [INFO ] Flatten gal took : 173 ms
[2023-03-19 10:49:19] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 5 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 5 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:19] [INFO ] Flatten gal took : 101 ms
[2023-03-19 10:49:19] [INFO ] Flatten gal took : 132 ms
[2023-03-19 10:49:20] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 4 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 4 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:21] [INFO ] Flatten gal took : 239 ms
[2023-03-19 10:49:21] [INFO ] Flatten gal took : 369 ms
[2023-03-19 10:49:22] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 4 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 4 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:23] [INFO ] Flatten gal took : 157 ms
[2023-03-19 10:49:23] [INFO ] Flatten gal took : 221 ms
[2023-03-19 10:49:23] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 5 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 5 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:24] [INFO ] Flatten gal took : 95 ms
[2023-03-19 10:49:24] [INFO ] Flatten gal took : 126 ms
[2023-03-19 10:49:24] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 4 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 5 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:24] [INFO ] Flatten gal took : 153 ms
[2023-03-19 10:49:25] [INFO ] Flatten gal took : 213 ms
[2023-03-19 10:49:25] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 158 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 160 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:25] [INFO ] Flatten gal took : 61 ms
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 63 ms
[2023-03-19 10:49:26] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 50 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 51 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 57 ms
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 65 ms
[2023-03-19 10:49:26] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 29 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 29 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 56 ms
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 63 ms
[2023-03-19 10:49:26] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 48 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 49 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 54 ms
[2023-03-19 10:49:26] [INFO ] Flatten gal took : 61 ms
[2023-03-19 10:49:27] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 28 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 28 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:27] [INFO ] Flatten gal took : 55 ms
[2023-03-19 10:49:27] [INFO ] Flatten gal took : 63 ms
[2023-03-19 10:49:27] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 31 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 31 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:27] [INFO ] Flatten gal took : 55 ms
[2023-03-19 10:49:27] [INFO ] Flatten gal took : 62 ms
[2023-03-19 10:49:27] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 40 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 41 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:27] [INFO ] Flatten gal took : 55 ms
[2023-03-19 10:49:27] [INFO ] Flatten gal took : 62 ms
[2023-03-19 10:49:28] [INFO ] Input system was already deterministic with 2197 transitions.
Starting structural reductions in LTL mode, iteration 0 : 507/507 places, 2197/2197 transitions.
Applied a total of 0 rules in 28 ms. Remains 507 /507 variables (removed 0) and now considering 2197/2197 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 29 ms. Remains : 507/507 places, 2197/2197 transitions.
[2023-03-19 10:49:28] [INFO ] Flatten gal took : 55 ms
[2023-03-19 10:49:28] [INFO ] Flatten gal took : 63 ms
[2023-03-19 10:49:28] [INFO ] Input system was already deterministic with 2197 transitions.
[2023-03-19 10:49:29] [INFO ] Flatten gal took : 1071 ms
[2023-03-19 10:49:40] [INFO ] Flatten gal took : 1065 ms
[2023-03-19 10:49:49] [INFO ] Export to MCC of 15 properties in file /home/mcc/execution/CTLFireability.sr.xml took 325 ms.
[2023-03-19 10:49:49] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 507 places, 2197 transitions and 6591 arcs took 8 ms.
Total runtime 108727 ms.
There are residual formulas that ITS could not solve within timeout
timeout --kill-after=10s --signal=SIGINT 1m for testing only

Marcie built on Linux at 2019-11-18.
A model checker for Generalized Stochastic Petri nets

authors: Alex Tovchigrechko (IDD package and CTL model checking)

Martin Schwarick (Symbolic numerical analysis and CSL model checking)

Christian Rohr (Simulative and approximative numerical model checking)

marcie@informatik.tu-cottbus.de

called as: /home/mcc/BenchKit/bin//../reducer/bin//../../marcie/bin/marcie --net-file=model.pnml --mcc-file=CTLFireability.xml --memory=6 --mcc-mode

parse successfull
net created successfully

Net: Petri
(NrP: 507 NrTr: 2197 NrArc: 6591)

parse formulas
formulas created successfully
place and transition orderings generation:0m 0.314sec

net check time: 0m 0.001sec

init dd package: 0m 2.511sec

TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16393216 kB
MemFree: 8762368 kB
After kill :
MemTotal: 16393216 kB
MemFree: 15944008 kB

BK_TIME_CONFINEMENT_REACHED

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

+ 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//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination CTLFireability -timeout 360 -rebuildPNML
check for maximal unmarked siphon
ok
check for constant places
ok
check if there are places and transitions
ok
check if there are transitions without pre-places
ok
check if at least one transition is enabled in m0
ok
check if there are transitions that can never fire
ok


initing FirstDep: 0m 0.012sec

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="Sudoku-PT-AN13"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="marciexred"
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 marciexred"
echo " Input is Sudoku-PT-AN13, examination is CTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r490-tall-167912708400258"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/Sudoku-PT-AN13.tgz
mv Sudoku-PT-AN13 execution
cd execution
if [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "UpperBounds" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] || [ "CTLFireability" = "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 [ "CTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLFireability" != "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 "CTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLFireability.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 '' CTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLFireability"
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 ;