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.r126-tall-167814504000626.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 gold2022
Input is DLCshifumi-PT-4b, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r126-tall-167814504000626
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 5.5M
-rw-r--r-- 1 mcc users 6.8K Feb 26 07:34 CTLCardinality.txt
-rw-r--r-- 1 mcc users 72K Feb 26 07:34 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.5K Feb 26 07:33 CTLFireability.txt
-rw-r--r-- 1 mcc users 37K Feb 26 07:33 CTLFireability.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 3.8K Feb 25 15:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Feb 25 15:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Feb 25 15:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 15:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 5.1M Mar 5 18:22 model.pnml
-rw-r--r-- 1 mcc users 9.6K Feb 26 07:35 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 97K Feb 26 07:35 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.1K Feb 26 07:35 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 56K Feb 26 07:35 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 15:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 15:54 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 DLCshifumi-PT-4b-CTLFireability-00
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-01
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-02
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-03
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-04
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-05
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-06
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-07
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-08
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-09
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-10
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-11
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-12
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-13
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-14
FORMULA_NAME DLCshifumi-PT-4b-CTLFireability-15

=== Now, execution of the tool begins

BK_START 1678292848884

gold2022
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> gold2022 --- 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 CTLFireability *
*************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa
MF=/home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)
/home/mcc/BenchKit/bin/verifypn -n -c -q 718 -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 ./CTLFireability.xml
CPN OverApproximation is only usable on colored models
Time left: 3589
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (16 in total)
Total simplification timout is 718 -- reduction timeout is 299
timeout 3589 /home/mcc/BenchKit/bin/verifypn -n -q 718 -l 29 -d 299 -z 4 -s OverApprox --binary-query-io 2 --write-simplified /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./CTLFireability.xml

Time left: 3576

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (16 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 0.000492 on verification
Search strategy option was ignored as the TAR engine is called.
FORMULA DLCshifumi-PT-4b-CTLFireability-14 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Query index 0 was solved

Query is NOT satisfied.


Solved using Trace Abstraction Refinement

Spent 0.00017 on verification
@@@0.76,83504@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 1 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-14 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3574
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.001055 on verification
Query index 0 was solved

Query is satisfied.

Spent 0.000433 on verification
@@@0.78,83000@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 2 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-04 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3573
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.000437 on verification
Search strategy option was ignored as the TAR engine is called.
FORMULA DLCshifumi-PT-4b-CTLFireability-05 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Query index 0 was solved

Query is satisfied.


Solved using Trace Abstraction Refinement

Spent 0.000148 on verification
@@@0.80,82732@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 3 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-05 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3572
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 58.9043 on verification
@@@59.94,2423056@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 4 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-03 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3512
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.064633 on verification
@@@0.95,112456@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ BestFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 5 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-12 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3511
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.06786 on verification


Query index 0 was solved
Query is satisfied.

Spent 0.06322 on verification
@@@0.93,112432@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 6 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-06 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3510
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.063627 on verification
@@@0.92,112512@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 7 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-10 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3509
------------------- QUERY 8 ----------------------
No solution found
Command terminated by signal 9
@@@223.19,8175124@@@


Time left: 3206
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.353258 on verification


Query index 0 was solved
Query is NOT satisfied.

Spent 0.365619 on verification
@@@1.36,112564@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 9 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-11 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3204
------------------- QUERY 10 ----------------------
No solution found
Command terminated by signal 9
@@@175.70,9153728@@@


Time left: 2903
------------------- QUERY 11 ----------------------
No solution found
Command terminated by signal 9
@@@170.31,7773892@@@


Time left: 2600
------------------- QUERY 12 ----------------------
No solution found
Command terminated by signal 9
@@@152.20,8052036@@@
Command terminated by signal 9
@@@287.46,14599680@@@


Time left: 2299
------------------- QUERY 13 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 106.135 on verification
@@@107.35,3650136@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 13 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-01 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2191
------------------- QUERY 14 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.994737 on verification
@@@1.91,112396@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 14 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-02 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2189
------------------- QUERY 15 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.349058 on verification
@@@1.24,112524@@@


Query index 0 was solved
Query is NOT satisfied.

Spent 0.35246 on verification
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 15 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-07 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2188
------------------- QUERY 16 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 193.246 on verification
@@@194.45,6203528@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.MnBBCJhFz3 /home/mcc/BenchKit/bin/tmp/tmp.z2UE7UmoRa --binary-query-io 1 -x 16 -n

FORMULA DLCshifumi-PT-4b-CTLFireability-08 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 1993
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 4 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 598 seconds)
Time left: 1993
------------------- QUERY 8 ----------------------
Running query 8 for 598 seconds. Remaining: 4 queries and 1993 seconds
No solution found
Command terminated by signal 9
@@@318.80,11418324@@@


Time left: 1392
------------------- QUERY 10 ----------------------
Running query 10 for 598 seconds. Remaining: 3 queries and 1392 seconds
No solution found
Command terminated by signal 9
@@@200.33,9303668@@@
Command terminated by signal 9
@@@451.95,16146348@@@


Time left: 940
------------------- QUERY 11 ----------------------
Running query 11 for 598 seconds. Remaining: 2 queries and 940 seconds
No solution found
Command terminated by signal 9
@@@170.77,8446668@@@
Command terminated by signal 9
@@@350.71,16145888@@@


Time left: 589
------------------- QUERY 12 ----------------------
Time left: 589
---------------------------------------------------
Step 4: Random Parallel processing
---------------------------------------------------
Doing random parallel verification of individual queries (4 in total)
Each query is verified by 4 parallel strategies for 147 seconds
------------------- QUERY 8 ----------------------
No solution found
Command terminated by signal 9
@@@136.53,4772984@@@


Time left: 439
------------------- QUERY 10 ----------------------
No solution found
Command terminated by signal 9
@@@85.06,4275944@@@
Command terminated by signal 9
@@@114.09,5523584@@@


Time left: 289
------------------- QUERY 11 ----------------------
No solution found
Command terminated by signal 9
@@@92.63,4114288@@@
Command terminated by signal 9
@@@126.99,5668428@@@


Time left: 140
------------------- QUERY 12 ----------------------
No solution found
Command terminated by signal 9
@@@88.96,4454196@@@
Command terminated by signal 9
@@@120.22,5616136@@@


Time left: -4
Out of time, terminating!
terminated-with-cleanup

BK_STOP 1678296442318

--------------------
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="DLCshifumi-PT-4b"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="gold2022"
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 gold2022"
echo " Input is DLCshifumi-PT-4b, 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 r126-tall-167814504000626"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DLCshifumi-PT-4b.tgz
mv DLCshifumi-PT-4b 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 ;