Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2022-input.r291-smll-165463870400444.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2022-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool tapaal
Input is AutonomousCar-PT-03a, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r291-smll-165463870400444
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 484K
-rw-r--r-- 1 mcc users 6.0K Jun 7 15:49 CTLCardinality.txt
-rw-r--r-- 1 mcc users 61K Jun 7 15:49 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.0K Jun 7 15:48 CTLFireability.txt
-rw-r--r-- 1 mcc users 46K Jun 7 15:48 CTLFireability.xml
-rw-r--r-- 1 mcc users 6 Jun 3 16:02 equiv_col
-rw-r--r-- 1 mcc users 4 Jun 3 16:02 instance
-rw-r--r-- 1 mcc users 6 Jun 3 16:02 iscolored
-rw-r--r-- 1 mcc users 3.5K Jun 3 16:18 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Jun 3 16:18 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Jun 3 16:19 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Jun 3 16:19 LTLFireability.xml
-rw-r--r-- 1 mcc users 42K Jun 3 16:02 model.pnml
-rw-r--r-- 1 mcc users 1 Jun 3 16:02 NewModel
-rw-r--r-- 1 mcc users 12K Jun 7 15:49 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 128K Jun 7 15:49 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.7K Jun 7 15:49 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 81K Jun 7 15:49 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Jun 3 16:19 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Jun 3 16:19 UpperBounds.xml

--------------------
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 AutonomousCar-PT-03a-LTLFireability-00
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-01
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-02
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-03
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-04
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-05
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-06
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-07
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-08
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-09
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-10
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-11
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-12
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-13
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-14
FORMULA_NAME AutonomousCar-PT-03a-LTLFireability-15

=== Now, execution of the tool begins

BK_START 1654970708437

tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL v5
Setting MODEL_PATH=.
Setting VERIFYPN=/home/mcc/BenchKit/bin/verifypn
Got BK_TIME_CONFINEMENT=3600
Setting TEMPDIR=/home/mcc/BenchKit/bin/tmp
Got BK_MEMORY_CONFINEMENT=16384
Limiting to 16265216 kB
Total timeout: 3590
Time left: 3590

*************************************
* TAPAAL verifying LTLFireability *
*************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb
MF=/home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)
/home/mcc/BenchKit/bin/verifypn -n -c -q 718 -ltl -l 29 -d 299 -z 4 -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./LTLFireability.xml
CPN OverApproximation is only usable on colored models
Time left: 3590
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (16 in total)
Total simplification timout is 718 -- reduction timeout is 299
timeout 1017 /home/mcc/BenchKit/bin/verifypn -n -ltl -q 718 -l 29 -d 299 -z 4 -s OverApprox --binary-query-io 2 --write-simplified /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./LTLFireability.xml
FORMULA AutonomousCar-PT-03a-LTLFireability-02 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 2 was solved

Query is NOT satisfied.

FORMULA AutonomousCar-PT-03a-LTLFireability-06 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 6 was solved

Query is satisfied.

FORMULA AutonomousCar-PT-03a-LTLFireability-08 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 8 was solved

Query is satisfied.

FORMULA AutonomousCar-PT-03a-LTLFireability-10 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 10 was solved

Query is NOT satisfied.
Solution found by parallel simplification (step 0)
Solution found by parallel simplification (step 0)
Solution found by parallel simplification (step 0)
Solution found by parallel simplification (step 0)
Time left: 3590

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (12 in total)
Each query is verified by 4 parallel strategies for 299 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.042348 on verification
@@@0.05,21436@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ ndfs\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 1 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-14 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3589
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.067425 on verification
@@@0.07,21664@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ ndfs\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 2 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-00 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3589
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.118415 on verification
@@@0.12,149636@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ dist\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 3 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-01 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC DIST_HEUR OPTIM-1
Time left: 3588
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.160633 on verification
@@@0.16,149156@@@
FORMULA AutonomousCar-PT-03a-LTLFireability-12 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC LOGFIRECOUNT_HEUR(5000) OPTIM-1

Query index 0 was solved
Query is NOT satisfied.
Spent 0.162375 on verification
@@@0.17,149276@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ fire-count\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 4 -n
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ aut\ -s\ DFS\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 4 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-12 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1
Time left: 3588
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.055093 on verification
@@@0.08,21572@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ ndfs\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 5 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-13 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3587
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.080539 on verification
@@@0.08,149528@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ dist\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 6 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-03 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC DIST_HEUR OPTIM-1
Time left: 3587
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is satisfied.
FORMULA AutonomousCar-PT-03a-LTLFireability-09 TRUE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1

Query index 0 was solved
Query is satisfied.
Spent 0.113197 on verification
Spent 0.079439 on verification
@@@0.12,150076@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ aut\ -s\ DFS\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 7 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-09 TRUE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3586
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.048093 on verification
FORMULA AutonomousCar-PT-03a-LTLFireability-15 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC DIST_HEUR OPTIM-1

Query index 0 was solved
Query is NOT satisfied.
Spent 0.105733 on verification
@@@0.07,21500@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ ndfs\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 8 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-15 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3586
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.127294 on verification
@@@0.13,149920@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ dist\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 9 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-05 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC DIST_HEUR OPTIM-1
Time left: 3585
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.111951 on verification
@@@0.12,150800@@@
FORMULA AutonomousCar-PT-03a-LTLFireability-04 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1

Query index 0 was solved
Query is NOT satisfied.
Spent 0.139244 on verification
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ fire-count\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 10 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-04 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC LOGFIRECOUNT_HEUR(5000) OPTIM-1
Time left: 3584
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.340017 on verification
@@@0.34,149468@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ dist\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 11 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-07 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC DIST_HEUR OPTIM-1
Time left: 3584
------------------- QUERY 12 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.116424 on verification
@@@0.13,21980@@@
FORMULA AutonomousCar-PT-03a-LTLFireability-11 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1

Query index 0 was solved
Query is NOT satisfied.
Spent 0.136604 on verification
@@@0.14,149508@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ tarjan\ --ltl-heur\ aut\ -s\ DFS\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 12 -n
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -ltl\ ndfs\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.hKVcRfqyLt /home/mcc/BenchKit/bin/tmp/tmp.jEenXO6sXb --binary-query-io 1 -x 12 -n

FORMULA AutonomousCar-PT-03a-LTLFireability-11 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3583
All queries are solved
Time left: 3583
terminated-with-cleanup

BK_STOP 1654970715287

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

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="AutonomousCar-PT-03a"
export BK_EXAMINATION="LTLFireability"
export BK_TOOL="tapaal"
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 2-4028"
echo " Executing tool tapaal"
echo " Input is AutonomousCar-PT-03a, examination is LTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r291-smll-165463870400444"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/AutonomousCar-PT-03a.tgz
mv AutonomousCar-PT-03a execution
cd execution
if [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "UpperBounds" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] || [ "LTLFireability" = "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 [ "LTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLFireability" != "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 "LTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLFireability.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 '' LTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLFireability"
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 ;