About the Execution of Tapaal for Kanban-PT-10000
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.r129-tall-165271816600317.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 Kanban-PT-10000, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r129-tall-165271816600317
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 244K
-rw-r--r-- 1 mcc users 6.9K Apr 29 17:36 CTLCardinality.txt
-rw-r--r-- 1 mcc users 72K Apr 29 17:36 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.5K Apr 29 17:35 CTLFireability.txt
-rw-r--r-- 1 mcc users 49K Apr 29 17:35 CTLFireability.xml
-rw-r--r-- 1 mcc users 6 May 10 09:34 equiv_col
-rw-r--r-- 1 mcc users 4.2K May 10 09:34 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6 May 10 09:34 instance
-rw-r--r-- 1 mcc users 6 May 10 09:34 iscolored
-rw-r--r-- 1 mcc users 4.0K May 9 08:10 LTLCardinality.txt
-rw-r--r-- 1 mcc users 29K May 9 08:10 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K May 9 08:10 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 9 08:10 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K May 10 09:34 model.pnml
-rw-r--r-- 1 mcc users 1.6K May 9 08:10 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K May 9 08:10 UpperBounds.xml
--------------------
content from stdout:
=== Data for post analysis generated by BenchKit (invocation template)
The expected result is a vector of positive values
NUM_VECTOR
here is the order used to build the result vector(from text file)
FORMULA_NAME Kanban-PT-10000-UpperBounds-00
FORMULA_NAME Kanban-PT-10000-UpperBounds-01
FORMULA_NAME Kanban-PT-10000-UpperBounds-02
FORMULA_NAME Kanban-PT-10000-UpperBounds-03
FORMULA_NAME Kanban-PT-10000-UpperBounds-04
FORMULA_NAME Kanban-PT-10000-UpperBounds-05
FORMULA_NAME Kanban-PT-10000-UpperBounds-06
FORMULA_NAME Kanban-PT-10000-UpperBounds-07
FORMULA_NAME Kanban-PT-10000-UpperBounds-08
FORMULA_NAME Kanban-PT-10000-UpperBounds-09
FORMULA_NAME Kanban-PT-10000-UpperBounds-10
FORMULA_NAME Kanban-PT-10000-UpperBounds-11
FORMULA_NAME Kanban-PT-10000-UpperBounds-12
FORMULA_NAME Kanban-PT-10000-UpperBounds-13
FORMULA_NAME Kanban-PT-10000-UpperBounds-14
FORMULA_NAME Kanban-PT-10000-UpperBounds-15
=== Now, execution of the tool begins
BK_START 1652770007720
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 CLASSIC verifying UpperBounds *
*****************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q
MF=/home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0
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 ./UpperBounds.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 3590 /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.PPNedZkY7Q --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./UpperBounds.xml
Time left: 3590
---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (16 in total)
Each query is verified by 4 parallel strategies for 138 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.022963 on verification
@@@0.02,6940@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 1 -n
FORMULA Kanban-PT-10000-UpperBounds-00 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3589
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.02614 on verification
@@@0.02,6852@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 2 -n
FORMULA Kanban-PT-10000-UpperBounds-01 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3589
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.022197 on verification
@@@0.02,6932@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 3 -n
FORMULA Kanban-PT-10000-UpperBounds-02 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Time left: 3589
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.022792 on verification
@@@0.02,6892@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 4 -n
FORMULA Kanban-PT-10000-UpperBounds-03 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Time left: 3589
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.002039 on verification
@@@0.00,6892@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 5 -n
FORMULA Kanban-PT-10000-UpperBounds-04 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Query index 0 was solved
Query is satisfied.
Spent 0.001592 on verification
@@@0.00,6968@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 5 -n
FORMULA Kanban-PT-10000-UpperBounds-04 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3588
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.012083 on verification
@@@0.01,6924@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 6 -n
FORMULA Kanban-PT-10000-UpperBounds-05 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3588
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.01173 on verification
@@@0.01,6872@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 7 -n
FORMULA Kanban-PT-10000-UpperBounds-06 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3588
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.010295 on verification
@@@0.01,6976@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 8 -n
FORMULA Kanban-PT-10000-UpperBounds-07 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3588
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.0192 on verification
@@@0.02,6924@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 9 -n
FORMULA Kanban-PT-10000-UpperBounds-08 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3587
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.024628 on verification
@@@0.02,6944@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 10 -n
FORMULA Kanban-PT-10000-UpperBounds-09 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Time left: 3587
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.002119 on verification
@@@0.00,6804@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 11 -n
FORMULA Kanban-PT-10000-UpperBounds-10 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3587
------------------- QUERY 12 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.009584 on verification
@@@0.01,6960@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 12 -n
FORMULA Kanban-PT-10000-UpperBounds-11 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3587
------------------- QUERY 13 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.002012 on verification
@@@0.00,6728@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 13 -n
FORMULA Kanban-PT-10000-UpperBounds-12 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3586
------------------- QUERY 14 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.007399 on verification
@@@0.00,6716@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 14 -n
FORMULA Kanban-PT-10000-UpperBounds-13 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3586
------------------- QUERY 15 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.012071 on verification
@@@0.01,6936@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 15 -n
FORMULA Kanban-PT-10000-UpperBounds-14 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3586
------------------- QUERY 16 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.011425 on verification
@@@0.01,6900@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.09Te3tksv0 /home/mcc/BenchKit/bin/tmp/tmp.PPNedZkY7Q --binary-query-io 1 -x 16 -n
FORMULA Kanban-PT-10000-UpperBounds-15 10000 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3586
All queries are solved
Time left: 3586
terminated-with-cleanup
BK_STOP 1652770011709
--------------------
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="Kanban-PT-10000"
export BK_EXAMINATION="UpperBounds"
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 Kanban-PT-10000, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r129-tall-165271816600317"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/Kanban-PT-10000.tgz
mv Kanban-PT-10000 execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "UpperBounds.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 '
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;