Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2024-input.r294-tajo-171654451100147.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2024-input.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.........................
=====================================================================
Generated by BenchKit 2-5568
Executing tool tapaal
Input is PolyORBLF-COL-S04J06T06, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r294-tajo-171654451100147
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 612K
-rw-r--r-- 1 mcc users 7.5K Apr 11 17:09 CTLCardinality.txt
-rw-r--r-- 1 mcc users 68K Apr 11 17:09 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.6K Apr 11 17:06 CTLFireability.txt
-rw-r--r-- 1 mcc users 59K Apr 11 17:06 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:43 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 18 16:43 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.1K Apr 23 07:43 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Apr 23 07:43 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Apr 23 07:43 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Apr 23 07:43 LTLFireability.xml
-rw-r--r-- 1 mcc users 13K Apr 11 17:18 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 115K Apr 11 17:18 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.5K Apr 11 17:16 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 74K Apr 11 17:16 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Apr 23 07:43 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Apr 23 07:43 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 18 16:43 equiv_pt
-rw-r--r-- 1 mcc users 10 May 18 16:43 instance
-rw-r--r-- 1 mcc users 5 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 154K May 18 16:43 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 PolyORBLF-COL-S04J06T06-LTLCardinality-00
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-01
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-02
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-03
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-04
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-05
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-06
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-07
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-08
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-09
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-10
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-11
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-12
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-13
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-14
FORMULA_NAME PolyORBLF-COL-S04J06T06-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1716763409237

tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL - v2.2024
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.ZvdAhYJqqH
MF=/home/mcc/BenchKit/bin/tmp/tmp.uuu9PhSWJM
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.ZvdAhYJqqH --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.uuu9PhSWJM -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./LTLCardinality.xml

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-00 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 0 was solved

Query is NOT satisfied.

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-01 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 1 was solved

Query is NOT satisfied.

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-05 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 5 was solved

Query is NOT satisfied.

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-06 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 6 was solved

Query is satisfied.

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-12 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 12 was solved

Query is satisfied.

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-15 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
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)
Time left: 3577

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (10 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 0.021011 on verification
@@@0.08,23900@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 1 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-10 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3576
------------------- QUERY 2 ----------------------
No solution found
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 2 -n
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 2 -n
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 2 -n
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 2 -n


Time left: 3275
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.020543 on verification
@@@0.09,23816@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 3 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-08 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3274
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.081153 on verification
@@@0.15,152136@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 4 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-04 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1
Time left: 3274
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.41831 on verification
@@@0.50,153428@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 5 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-14 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1
Time left: 3273
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.009044 on verification
@@@0.12,23664@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 6 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-11 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3273
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is satisfied.
Spent 0.009627 on verification
@@@0.10,23764@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 7 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-13 TRUE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 3273
------------------- QUERY 8 ----------------------
No solution found
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 8 -n
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 8 -n
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 8 -n
parallel: Warning: This job was killed because it timed out:
parallel: Warning: 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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 8 -n


Time left: 2971
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.027928 on verification
@@@0.12,24220@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 9 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-03 FALSE TECHNIQUES EXPLICIT NDFS WEAK_SKIP HEURISTIC AUTOMATON_HEUR OPTIM-1
Time left: 2970
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)

Query index 0 was solved
Query is NOT satisfied.
Spent 0.088814 on verification
@@@0.19,152228@@@
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.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 10 -n

FORMULA PolyORBLF-COL-S04J06T06-LTLCardinality-02 FALSE TECHNIQUES EXPLICIT TARJAN WEAK_SKIP OPTIM-1
Time left: 2970
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 2 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 512 seconds)
Time left: 2970
------------------- QUERY 2 ----------------------
Running query 2 for 1485 seconds. Remaining: 2 queries and 2970 seconds
No solution found
parallel: Warning: This job was killed because it timed out:
parallel: Warning: eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-ltl tarjan -q 40 -l 5 -d 119 -s BestFS --ltl-por automaton --ltl-heur aut' /home/mcc/BenchKit/bin/tmp/tmp.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 2 -n


Time left: 1482
------------------- QUERY 8 ----------------------
Running query 8 for 1482 seconds. Remaining: 1 queries and 1482 seconds
No solution found
parallel: Warning: This job was killed because it timed out:
parallel: Warning: eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-ltl tarjan -q 40 -l 5 -d 119 -s BestFS --ltl-por automaton --ltl-heur aut' /home/mcc/BenchKit/bin/tmp/tmp.uuu9PhSWJM /home/mcc/BenchKit/bin/tmp/tmp.ZvdAhYJqqH --binary-query-io 1 -x 8 -n


Time left: -2
Out of time, terminating!
terminated-with-cleanup

BK_STOP 1716767001662

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

ERROR: A query could not be translated from CTL* to CTL.

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="PolyORBLF-COL-S04J06T06"
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 2-5568"
echo " Executing tool tapaal"
echo " Input is PolyORBLF-COL-S04J06T06, 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 r294-tajo-171654451100147"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PolyORBLF-COL-S04J06T06.tgz
mv PolyORBLF-COL-S04J06T06 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 ;