About the Execution of 2022-gold for ShieldRVs-PT-050B
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
16225.195 | 3591860.00 | 8233667.00 | 949.00 | TFFFFFT?FT?FTTTT | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/mnt/tpsp/fkordon/mcc2023-input.r446-tajo-167905989000119.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2023-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
..............
=====================================================================
Generated by BenchKit 2-5348
Executing tool gold2022
Input is ShieldRVs-PT-050B, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r446-tajo-167905989000119
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.1M
-rw-r--r-- 1 mcc users 7.9K Feb 26 18:23 CTLCardinality.txt
-rw-r--r-- 1 mcc users 88K Feb 26 18:23 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.9K Feb 26 18:23 CTLFireability.txt
-rw-r--r-- 1 mcc users 42K Feb 26 18:23 CTLFireability.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 3.5K Feb 25 17:03 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Feb 25 17:03 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 17:03 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 17:03 LTLFireability.xml
-rw-r--r-- 1 mcc users 625K Mar 5 18:23 model.pnml
-rw-r--r-- 1 mcc users 9.1K Feb 26 18:24 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 91K Feb 26 18:24 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.6K Feb 26 18:24 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 52K Feb 26 18:24 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:03 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 17:03 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 ShieldRVs-PT-050B-ReachabilityCardinality-00
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-01
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-02
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-03
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-04
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-05
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-06
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-07
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-08
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-09
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-10
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-11
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-12
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-13
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-14
FORMULA_NAME ShieldRVs-PT-050B-ReachabilityCardinality-15
=== Now, execution of the tool begins
BK_START 1679447675785
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 ReachabilityCardinality *
**********************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8
MF=/home/mcc/BenchKit/bin/tmp/tmp.NF7jDNdQQC
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 ./ReachabilityCardinality.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.jjVter17q8 --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.NF7jDNdQQC -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./ReachabilityCardinality.xml
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-02 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 2 was solved
Query is NOT satisfied.
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-12 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 12 was solved
Query is satisfied.
Solution found by parallel simplification (step 0)
Solution found by parallel simplification (step 0)
Time left: 3498
---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (14 in total)
Each query is verified by 4 parallel strategies for 256 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)
Search strategy option was ignored as the TAR engine is called.
Query index 0 was solved
Query is satisfied.
Solved using Trace Abstraction Refinement
Spent 0.000382 on verification
@@@0.04,9720@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 1 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-00 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 3498
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001513 on verification
@@@0.04,9732@@@
Query index 0 was solved
Query is satisfied.
Spent 0.001847 on verification
@@@0.03,9684@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 2 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-13 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3497
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.024392 on verification
@@@0.07,9728@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 3 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-14 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3497
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)
Search strategy option was ignored as the TAR engine is called.
Query index 0 was solved
Query is NOT satisfied.
Solved using Trace Abstraction Refinement
Spent 0.000181 on verification
@@@0.04,9684@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 4 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-03 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 3497
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
Search strategy option was ignored as the TAR engine is called.
Query index 0 was solved
Query is NOT satisfied.
Solved using Trace Abstraction Refinement
Spent 0.000181 on verification
@@@0.03,9712@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 5 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-05 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 3496
------------------- QUERY 6 ----------------------
No solution found
Time left: 3237
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
Search strategy option was ignored as the TAR engine is called.
Query index 0 was solved
Query is satisfied.
Solved using Trace Abstraction Refinement
Spent 0.00037 on verification
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-09 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 0 was solved
Query is satisfied.
Spent 0.001055 on verification
@@@0.05,9864@@@
@@@0.05,9748@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 7 -n
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 7 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-09 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 3237
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.003247 on verification
@@@0.04,9804@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 8 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-01 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3237
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.311012 on verification
@@@0.35,11816@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 9 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-11 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3236
------------------- QUERY 10 ----------------------
No solution found
Time left: 2978
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.024196 on verification
@@@0.06,9956@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ DFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 11 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-15 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 2978
------------------- QUERY 12 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.158247 on verification
@@@0.20,9904@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 12 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-04 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 2977
------------------- QUERY 13 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.003192 on verification
@@@0.04,9676@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 13 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-08 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 2977
------------------- QUERY 14 ----------------------
Solution found by parallel processing (step 1)
Search strategy option was ignored as the TAR engine is called.
Query index 0 was solved
Query is satisfied.
Solved using Trace Abstraction Refinement
Spent 32.7952 on verification
@@@32.84,9872@@@
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.NF7jDNdQQC /home/mcc/BenchKit/bin/tmp/tmp.jjVter17q8 --binary-query-io 1 -x 14 -n
FORMULA ShieldRVs-PT-050B-ReachabilityCardinality-06 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 2944
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 2 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 512 seconds)
Time left: 2944
------------------- QUERY 6 ----------------------
Running query 6 for 1472 seconds. Remaining: 2 queries and 2944 seconds
No solution found
Command terminated by signal 9
@@@1295.96,16110292@@@
Time left: 1469
------------------- QUERY 10 ----------------------
Running query 10 for 1469 seconds. Remaining: 1 queries and 1469 seconds
No solution found
Time left: -2
Out of time, terminating!
terminated-with-cleanup
BK_STOP 1679451267645
--------------------
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="ShieldRVs-PT-050B"
export BK_EXAMINATION="ReachabilityCardinality"
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 ShieldRVs-PT-050B, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r446-tajo-167905989000119"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/ShieldRVs-PT-050B.tgz
mv ShieldRVs-PT-050B execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "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 [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "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 "ReachabilityCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityCardinality.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 [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
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 ;