About the Execution of 2022-gold for HypertorusGrid-PT-d2k2p1b00
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
16227.647 | 3593983.00 | 8299464.00 | 9130.00 | FFFFFFFF???F?F?? | 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.r254-tall-167856439300026.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 HypertorusGrid-PT-d2k2p1b00, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r254-tall-167856439300026
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 548K
-rw-r--r-- 1 mcc users 10K Feb 26 10:46 CTLCardinality.txt
-rw-r--r-- 1 mcc users 94K Feb 26 10:46 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.8K Feb 26 10:45 CTLFireability.txt
-rw-r--r-- 1 mcc users 53K Feb 26 10:45 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 6.3K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 10 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 4.7K Feb 25 16:16 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K Feb 25 16:16 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.0K Feb 25 16:17 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 16:17 LTLFireability.xml
-rwxr-xr-x 1 mcc users 35K Mar 5 18:22 model.pnml
-rw-r--r-- 1 mcc users 16K Feb 26 10:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 144K Feb 26 10:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Feb 26 10:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 70K Feb 26 10:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Feb 25 16:17 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Feb 25 16:17 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 HypertorusGrid-PT-d2k2p1b00-CTLFireability-00
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-01
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-02
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-03
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-04
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-05
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-06
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-07
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-08
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-09
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-10
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-11
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-12
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-13
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-14
FORMULA_NAME HypertorusGrid-PT-d2k2p1b00-CTLFireability-15
=== Now, execution of the tool begins
BK_START 1678662307342
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.OQ7gZX8pGf
MF=/home/mcc/BenchKit/bin/tmp/tmp.rPzyMC5Y0E
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: 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.OQ7gZX8pGf --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.rPzyMC5Y0E -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./CTLFireability.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 299 seconds
------------------- QUERY 1 ----------------------
No solution found
Command terminated by signal 9
@@@65.46,6418184@@@
Command terminated by signal 9
@@@115.18,8608120@@@
Command terminated by signal 9
@@@271.44,15804276@@@
Time left: 3288
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.065419 on verification
@@@0.07,59400@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 2 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3288
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.058678 on verification
@@@0.06,59528@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 3 -n
Query index 0 was solved
Query is NOT satisfied.
Spent 0.051432 on verification
@@@0.05,59496@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 3 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-03 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3288
------------------- QUERY 4 ----------------------
No solution found
Command terminated by signal 9
@@@94.51,6725680@@@
Command terminated by signal 9
@@@152.11,8460596@@@
Time left: 2986
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.18745 on verification
@@@0.22,59424@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 5 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2986
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.073896 on verification
@@@0.08,59464@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 6 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-11 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2985
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.287833 on verification
@@@0.30,59820@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 7 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-05 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2985
------------------- QUERY 8 ----------------------
No solution found
Command terminated by signal 9
@@@74.08,6656420@@@
Command terminated by signal 9
@@@132.04,8069084@@@
Command terminated by signal 9
@@@289.99,15839980@@@
Time left: 2683
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.096622 on verification
@@@0.10,59404@@@
Query index 0 was solved
Query is NOT satisfied.
Spent 0.107329 on verification
@@@0.13,60364@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 9 -n
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 9 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-04 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2683
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.085019 on verification
@@@0.09,59400@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 10 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-01 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2683
------------------- QUERY 11 ----------------------
No solution found
Command terminated by signal 9
@@@83.46,6816044@@@
Command terminated by signal 9
@@@138.00,9206716@@@
Time left: 2380
------------------- QUERY 12 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.219759 on verification
@@@0.26,59380@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 12 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-13 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2379
------------------- QUERY 13 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.091834 on verification
@@@0.09,59496@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 13 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-06 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2379
------------------- QUERY 14 ----------------------
No solution found
Command terminated by signal 9
@@@131.22,7759560@@@
Command terminated by signal 9
@@@259.67,8154772@@@
Time left: 2077
------------------- QUERY 15 ----------------------
No solution found
Command terminated by signal 9
@@@72.03,6257184@@@
Command terminated by signal 9
@@@123.27,8438848@@@
Command terminated by signal 9
@@@267.14,15834188@@@
Time left: 1776
------------------- QUERY 16 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 1.15754 on verification
@@@1.19,84096@@@
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.rPzyMC5Y0E /home/mcc/BenchKit/bin/tmp/tmp.OQ7gZX8pGf --binary-query-io 1 -x 16 -n
FORMULA HypertorusGrid-PT-d2k2p1b00-CTLFireability-07 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 1775
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 6 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 598 seconds)
Time left: 1775
------------------- QUERY 1 ----------------------
Running query 1 for 598 seconds. Remaining: 6 queries and 1775 seconds
No solution found
Command terminated by signal 9
@@@96.95,9036760@@@
Command terminated by signal 9
@@@240.74,16145512@@@
Time left: 1534
------------------- QUERY 4 ----------------------
Running query 4 for 598 seconds. Remaining: 5 queries and 1534 seconds
No solution found
Command terminated by signal 9
@@@104.28,8899248@@@
Command terminated by signal 9
@@@295.26,16145584@@@
Time left: 1238
------------------- QUERY 8 ----------------------
Running query 8 for 598 seconds. Remaining: 4 queries and 1238 seconds
No solution found
Command terminated by signal 9
@@@99.24,9118516@@@
Command terminated by signal 9
@@@240.05,16142500@@@
Time left: 998
------------------- QUERY 11 ----------------------
Running query 11 for 598 seconds. Remaining: 3 queries and 998 seconds
No solution found
Command terminated by signal 9
@@@98.56,8934928@@@
Command terminated by signal 9
@@@245.64,16141572@@@
Time left: 752
------------------- QUERY 14 ----------------------
Running query 14 for 598 seconds. Remaining: 2 queries and 752 seconds
No solution found
Command terminated by signal 9
@@@217.00,8195204@@@
Command terminated by signal 9
@@@447.21,16142768@@@
Time left: 304
------------------- QUERY 15 ----------------------
Time left: 304
---------------------------------------------------
Step 4: Random Parallel processing
---------------------------------------------------
Doing random parallel verification of individual queries (6 in total)
Each query is verified by 4 parallel strategies for 50 seconds
------------------- QUERY 1 ----------------------
No solution found
Time left: 251
------------------- QUERY 4 ----------------------
No solution found
Command terminated by signal 9
@@@49.13,4272872@@@
Time left: 199
------------------- QUERY 8 ----------------------
No solution found
Command terminated by signal 9
@@@44.15,4230464@@@
Time left: 147
------------------- QUERY 11 ----------------------
No solution found
Command terminated by signal 9
@@@43.00,4292676@@@
Time left: 94
------------------- QUERY 14 ----------------------
No solution found
Time left: 41
------------------- QUERY 15 ----------------------
No solution found
Time left: -4
Out of time, terminating!
terminated-with-cleanup
BK_STOP 1678665901325
--------------------
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="HypertorusGrid-PT-d2k2p1b00"
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 HypertorusGrid-PT-d2k2p1b00, 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 r254-tall-167856439300026"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/HypertorusGrid-PT-d2k2p1b00.tgz
mv HypertorusGrid-PT-d2k2p1b00 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 '
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 ;