fond
Model Checking Contest 2018
8th edition, Bratislava, Slovakia, June 26, 2018
Execution of r120-csrt-152666481900866
Last Updated
June 26, 2018

About the Execution of Tapaal for PhilosophersDyn-COL-80

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15919.270 2764996.00 8091664.00 4217.60 TTTTTTTFTFFTTFFF 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 188K
-rw-r--r-- 1 mcc users 3.3K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 16K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 12K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:50 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 5.9K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.6K May 26 09:27 LTLCardinality.txt
-rw-r--r-- 1 mcc users 12K May 26 09:27 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K May 26 09:27 LTLFireability.txt
-rw-r--r-- 1 mcc users 9.6K May 26 09:27 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 19K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 113 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 351 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 2.8K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 15K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 15 18:50 equiv_pt
-rw-r--r-- 1 mcc users 3 May 15 18:50 instance
-rw-r--r-- 1 mcc users 5 May 15 18:50 iscolored
-rw-r--r-- 1 mcc users 36K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool tapaal
Input is PhilosophersDyn-COL-80, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r120-csrt-152666481900866
=====================================================================


--------------------
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 PhilosophersDyn-COL-80-ReachabilityCardinality-00
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-01
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-02
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-03
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-04
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-05
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-06
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-07
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-08
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-09
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-10
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-11
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-12
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-13
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-14
FORMULA_NAME PhilosophersDyn-COL-80-ReachabilityCardinality-15

=== Now, execution of the tool begins

BK_START 1528620574940

tapaal
---> tapaal --- TAPAAL
Total timeout: 3590
Time left: 3590

**********************************************
* TAPAAL verifying ReachabilityCardinality *
**********************************************
/home/mcc/tmp
/home/mcc/tmp/tmp.yCXGGFZIUg
/home/mcc/tmp/tmp.aMsxvlQXRd
Time left: 3589
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)
Solution found by stripping colors (step -1) for query index 3
Solution found by stripping colors (step -1) for query index 4
Solution found by stripping colors (step -1) for query index 14





Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-00 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-01 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-02 is satisfied.

Query is MAYBE satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-03 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 3 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-04 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX CPN_APPROX
Query index 4 was solved

Query is satisfied.

Solved using CPN Approximation



Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-05 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-09 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-15 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-12 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-13 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-11 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-10 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-08 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-06 is satisfied.

Query is MAYBE satisfied.


Unable to decide if PhilosophersDyn-COL-80-ReachabilityCardinality-07 is satisfied.

Query is MAYBE satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-14 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 14 was solved

Query is NOT satisfied.

Solved using CPN Approximation
Time left: 3589
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (13 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.yCXGGFZIUg --write-reduced /home/mcc/tmp/tmp.aMsxvlQXRd -x 1,2,3,6,7,8,9,10,11,12,13,14,16 ./model.pnml ./ReachabilityCardinality.xml
note: lpsolve timeout
note: lpsolve timeout




note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout





FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-00 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 0 was solved

Query is satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-01 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 1 was solved

Query is satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-02 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 2 was solved

Query is satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-05 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 3 was solved

Query is satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-09 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 7 was solved

Query is NOT satisfied.


FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-15 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX UNFOLDING_TO_PT
Query index 12 was solved

Query is NOT 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)
Solution found by parallel simplification (step 0)
Time left: 2055

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (7 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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
@@@18.03,3990636@@@




Query index 0 was solved

Query is satisfied.

@@@175.85,5118060@@@
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.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 1 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-06 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1879
------------------- 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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Command terminated by signal 9
@@@28.41,4350368@@@



Query index 0 was solved

Query is satisfied.

@@@170.34,5118300@@@
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.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 2 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-12 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1708
------------------- 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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
@@@17.88,3990284@@@




Query index 0 was solved

Query is NOT satisfied.

@@@180.35,5117992@@@
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.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 3 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-07 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1527
------------------- 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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
@@@13.41,3990556@@@




Query index 0 was solved

Query is NOT satisfied.

@@@166.69,5118012@@@
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/tmp/tmp.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 4 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-10 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1360
------------------- QUERY 5 ----------------------
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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Command terminated by signal 9
@@@20.37,4350444@@@




Query index 0 was solved

Query is NOT satisfied.

@@@179.14,5115464@@@
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.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 5 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-13 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1180
------------------- QUERY 6 ----------------------
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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
@@@15.94,3990204@@@




Query index 0 was solved

Query is satisfied.

@@@172.34,5117916@@@
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.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 6 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-11 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1007
------------------- 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 = "en_US.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 = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Command terminated by signal 6
@@@19.45,3990512@@@




Query index 0 was solved

Query is satisfied.

@@@181.96,5117920@@@
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.aMsxvlQXRd /home/mcc/tmp/tmp.yCXGGFZIUg --binary-query-io 1 -x 7 -n

FORMULA PhilosophersDyn-COL-80-ReachabilityCardinality-08 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 825
All queries are solved
Time left: 825

BK_STOP 1528623339936

--------------------
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="PhilosophersDyn-COL-80"
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/PhilosophersDyn-COL-80.tgz
mv PhilosophersDyn-COL-80 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 PhilosophersDyn-COL-80, 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 r120-csrt-152666481900866"
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 '' ReachabilityCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
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 ;