About the Execution of Tapaal for BridgeAndVehicles-PT-V80P50N20
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
646.790 | 3590221.00 | 6027079.00 | 455.50 | FF?FF?F?FFFTFFTF | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Waiting for the VM to be ready (probing ssh)
...................
/home/mcc/execution
total 5.2M
-rw-r--r-- 1 mcc users 8.8K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 31K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 95K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 278K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:49 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.1K May 15 18:49 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.6K May 15 18:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 16K May 15 18:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 52K May 15 18:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 150K May 15 18:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 15K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 45K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 121 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 359 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 87K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 230K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.6K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 5.4K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 15 18:49 equiv_col
-rw-r--r-- 1 mcc users 10 May 15 18:49 instance
-rw-r--r-- 1 mcc users 6 May 15 18:49 iscolored
-rw-r--r-- 1 mcc users 4.1M May 15 18:49 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool tapaal
Input is BridgeAndVehicles-PT-V80P50N20, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r036-ebro-152646316200383
=====================================================================
--------------------
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 BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-00
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-01
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-02
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-03
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-04
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-05
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-06
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-07
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-08
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-09
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-10
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-11
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-12
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-13
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-14
FORMULA_NAME BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-15
=== Now, execution of the tool begins
BK_START 1527228076501
tapaal
---> tapaal --- TAPAAL
Total timeout: 3590
Time left: 3590
**********************************************
* TAPAAL verifying ReachabilityCardinality *
**********************************************
/home/mcc/tmp
/home/mcc/tmp/tmp.Z1zGV9aFjJ
/home/mcc/tmp/tmp.Qkf5bEKWiJ
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
/home/mcc/BenchKit/bin/verifypn -n -q 718 -l 29 -d 299 -z 4 -s OverApprox --write-simplified /home/mcc/tmp/tmp.Z1zGV9aFjJ --write-reduced /home/mcc/tmp/tmp.Qkf5bEKWiJ -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./ReachabilityCardinality.xml
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-01 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 1 was solved
Query is NOT satisfied.
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-03 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 3 was solved
Query is NOT satisfied.
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-06 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 6 was solved
Query is NOT satisfied.
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-09 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 9 was solved
Query is NOT satisfied.
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-11 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 11 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)
Time left: 3588
---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (11 in total)
Each query is verified by 4 parallel strategies for 256 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is satisfied.
@@@1.02,21636@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 1 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-14 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3586
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@1.01,21388@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 2 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-08 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3585
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@1.02,21536@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 3 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-10 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3584
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@1.21,21548@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 4 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-13 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3582
------------------- QUERY 5 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Time left: 3324
------------------- QUERY 6 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Time left: 3065
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@29.23,30484@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 7 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-15 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3036
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@1.02,21552@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 8 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-12 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3034
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@1.07,21532@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 9 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-00 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3033
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Query index 0 was solved
Query is NOT satisfied.
@@@1.01,21584@@@
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/tmp/tmp.Qkf5bEKWiJ /home/mcc/tmp/tmp.Z1zGV9aFjJ --binary-query-io 1 -x 10 -n
FORMULA BridgeAndVehicles-PT-V80P50N20-ReachabilityCardinality-04 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3032
------------------- QUERY 11 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "fr_FR.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Time left: 2774
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 3 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 512 seconds)
Time left: 2774
------------------- QUERY 5 ----------------------
Running query 5 for 924 seconds. Remaining: 3 queries and 2774 seconds
No solution found
Time left: 1850
------------------- QUERY 6 ----------------------
Running query 6 for 925 seconds. Remaining: 2 queries and 1850 seconds
No solution found
Time left: 925
------------------- QUERY 11 ----------------------
Running query 11 for 925 seconds. Remaining: 1 queries and 925 seconds
No solution found
Time left: 0
Out of time, terminating!
BK_STOP 1527231666722
--------------------
content from stderr:
CPN OverApproximation is only usable on colored models
Command exited with non-zero status 124
"@@@924.03,397292@@@"
Command exited with non-zero status 124
"@@@925.03,423276@@@"
Command exited with non-zero status 124
"@@@925.03,435372@@@"
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="BridgeAndVehicles-PT-V80P50N20"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="tapaal"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
# 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
tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-PT-V80P50N20.tgz
mv BridgeAndVehicles-PT-V80P50N20 execution
cd execution
pwd
ls -lh
# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-3637"
echo " Executing tool tapaal"
echo " Input is BridgeAndVehicles-PT-V80P50N20, 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 r036-ebro-152646316200383"
echo "====================================================================="
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
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 ;