fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r525-tall-167987249200267
Last Updated
May 14, 2023

About the Execution of Tapaal for EisenbergMcGuire-PT-09

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
107.728 3655.00 5837.00 10.00 FFTFTFFFTFFTTFFT normal

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.r525-tall-167987249200267.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)
............
=====================================================================
Generated by BenchKit 2-5348
Executing tool tapaal
Input is EisenbergMcGuire-PT-09, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r525-tall-167987249200267
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 2.6M
-rw-r--r-- 1 mcc users 6.3K Mar 23 15:21 CTLCardinality.txt
-rw-r--r-- 1 mcc users 59K Mar 23 15:21 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.0K Mar 23 15:19 CTLFireability.txt
-rw-r--r-- 1 mcc users 50K Mar 23 15:19 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.8K Mar 23 07:07 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Mar 23 07:07 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.2K Mar 23 07:07 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Mar 23 07:07 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 Mar 26 22:42 NewModel
-rw-r--r-- 1 mcc users 16K Mar 23 15:23 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 160K Mar 23 15:23 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 12K Mar 23 15:22 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 79K Mar 23 15:22 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Mar 23 07:07 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Mar 23 07:07 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 26 22:42 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 26 22:42 instance
-rw-r--r-- 1 mcc users 6 Mar 26 22:42 iscolored
-rw-r--r-- 1 mcc users 2.1M Mar 26 22:42 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 EisenbergMcGuire-PT-09-LTLCardinality-00
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-01
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-02
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-03
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-04
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-05
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-06
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-07
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-08
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-09
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-10
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-11
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-12
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-13
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-14
FORMULA_NAME EisenbergMcGuire-PT-09-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1679930326539

tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL
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 LTLCardinality *
*************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4
MF=/home/mcc/BenchKit/bin/tmp/tmp.l0CkI7oSRw
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)

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.o8nQ0JroN4 --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.l0CkI7oSRw -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./LTLCardinality.xml
FORMULA EisenbergMcGuire-PT-09-LTLCardinality-00 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 0 was solved

Query is NOT satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-04 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 4 was solved

Query is satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-07 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 7 was solved

Query is NOT satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-08 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 8 was solved

Query is satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-11 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 11 was solved

Query is satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-12 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 12 was solved

Query is satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-13 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 13 was solved

Query is NOT satisfied.

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-15 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 15 was solved

Query is 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)
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: 3589

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (8 in total)
Each query is verified by 4 parallel strategies for 299 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved

Query is NOT satisfied.

Spent 0.025779 on verification
@@@0.11,23896@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 1 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-14 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Time left: 3589
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is NOT satisfied.
Spent 0.054235 on verification
@@@0.12,153300@@@
FORMULA EisenbergMcGuire-PT-09-LTLCardinality-01 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 0.050029 on verification
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 2 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-01 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP STUBBORN AUT_STUB HEURISTIC DIST_HEUR OPTIM-1
Time left: 3589
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is NOT satisfied.
Spent 0.016172 on verification
@@@0.09,25888@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 3 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-06 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3588
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is NOT satisfied.
Spent 0.022457 on verification
@@@0.11,25948@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 4 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-09 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3588
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is NOT satisfied.
Spent 0.027218 on verification
@@@0.10,26168@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 5 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-10 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3588
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is NOT satisfied.
Spent 0.005832 on verification
@@@0.17,25380@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 6 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-05 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3587
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is satisfied.
Spent 0.005804 on verification
@@@0.18,25376@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 7 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-02 TRUE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3587
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Query index 0 was solved
Query is NOT satisfied.
Spent 0.00572 on verification
@@@0.19,25396@@@
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.l0CkI7oSRw /home/mcc/BenchKit/bin/tmp/tmp.o8nQ0JroN4 --binary-query-io 1 -x 8 -n

FORMULA EisenbergMcGuire-PT-09-LTLCardinality-03 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3586
All queries are solved
Time left: 3586
terminated-with-cleanup

BK_STOP 1679930330194

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

CPN OverApproximation is only usable on colored models

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="EisenbergMcGuire-PT-09"
export BK_EXAMINATION="LTLCardinality"
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 2-5348"
echo " Executing tool tapaal"
echo " Input is EisenbergMcGuire-PT-09, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r525-tall-167987249200267"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/EisenbergMcGuire-PT-09.tgz
mv EisenbergMcGuire-PT-09 execution
cd execution
if [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "UpperBounds" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] || [ "LTLCardinality" = "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 [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '' LTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLCardinality"
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 ;