About the Execution of Tapaal for CSRepetitions-COL-02
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
111.111 | 7586.00 | 7711.00 | 92.80 | 2 2 2 2 4 4 2 2 4 4 4 2 4 2 2 2 | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2024-input.r074-tall-171620510700181.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
...............
=====================================================================
Generated by BenchKit 2-5568
Executing tool tapaal
Input is CSRepetitions-COL-02, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r074-tall-171620510700181
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 516K
-rw-r--r-- 1 mcc users 8.1K Apr 12 09:38 CTLCardinality.txt
-rw-r--r-- 1 mcc users 70K Apr 12 09:38 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.0K Apr 12 09:31 CTLFireability.txt
-rw-r--r-- 1 mcc users 45K Apr 12 09:31 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:42 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 5.0K Apr 22 14:32 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K Apr 22 14:32 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Apr 22 14:32 LTLFireability.txt
-rw-r--r-- 1 mcc users 14K Apr 22 14:32 LTLFireability.xml
-rw-r--r-- 1 mcc users 17K Apr 12 09:43 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 143K Apr 12 09:43 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 13K Apr 12 09:40 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 96K Apr 12 09:40 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Apr 22 14:32 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Apr 22 14:32 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 18 16:42 equiv_pt
-rw-r--r-- 1 mcc users 3 May 18 16:42 instance
-rw-r--r-- 1 mcc users 5 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 13K May 18 16:42 model.pnml
--------------------
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 CSRepetitions-COL-02-UpperBounds-00
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-01
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-02
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-03
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-04
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-05
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-06
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-07
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-08
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-09
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-10
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-11
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-12
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-13
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-14
FORMULA_NAME CSRepetitions-COL-02-UpperBounds-15
=== Now, execution of the tool begins
BK_START 1716278403252
tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL - v2.2024
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.jx21WoQvCD
MF=/home/mcc/BenchKit/bin/tmp/tmp.06ZGo22J5S
Time left: 3590
---------------------------------------------------
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 9
Solution found by stripping colors (step -1) for query index 11
Solution found by stripping colors (step -1) for query index 15
FORMULA CSRepetitions-COL-02-UpperBounds-03 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 3 was solved
Query is satisfied.
Solved using CPN Approximation
FORMULA CSRepetitions-COL-02-UpperBounds-04 4 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 4 was solved
Query is satisfied.
Solved using CPN Approximation
FORMULA CSRepetitions-COL-02-UpperBounds-09 4 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 9 was solved
Query is satisfied.
Solved using CPN Approximation
FORMULA CSRepetitions-COL-02-UpperBounds-11 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 11 was solved
Query is satisfied.
Solved using CPN Approximation
FORMULA CSRepetitions-COL-02-UpperBounds-15 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 15 was solved
Query is satisfied.
Solved using CPN Approximation
Unable to decide if CSRepetitions-COL-02-UpperBounds-00 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-01 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-02 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-06 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-07 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-14 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-05 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-08 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-10 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-12 is satisfied.
Query is MAYBE satisfied.
Unable to decide if CSRepetitions-COL-02-UpperBounds-13 is satisfied.
Query is MAYBE satisfied.
Spent 0.001384 on verification
Time left: 3590
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (11 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.jx21WoQvCD --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.06ZGo22J5S -x 1,2,3,6,7,8,9,11,13,14,15 ./model.pnml ./UpperBounds.xml
Time left: 3585
---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (11 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 0.001588 on verification
@@@0.00,6140@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 1 -n
FORMULA CSRepetitions-COL-02-UpperBounds-00 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3585
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001371 on verification
@@@0.00,5848@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 2 -n
FORMULA CSRepetitions-COL-02-UpperBounds-01 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Query index 0 was solved
Query is satisfied.
Spent 0.001369 on verification
@@@0.00,5864@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 2 -n
FORMULA CSRepetitions-COL-02-UpperBounds-01 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3584
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001359 on verification
@@@0.00,5764@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 3 -n
FORMULA CSRepetitions-COL-02-UpperBounds-02 2 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)
Query index 0 was solved
Query is satisfied.
Spent 0.001659 on verification
@@@0.00,6044@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 4 -n
FORMULA CSRepetitions-COL-02-UpperBounds-05 4 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3584
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001542 on verification
@@@0.00,5720@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 5 -n
FORMULA CSRepetitions-COL-02-UpperBounds-06 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3584
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001312 on verification
@@@0.00,5812@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 6 -n
FORMULA CSRepetitions-COL-02-UpperBounds-07 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3584
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001905 on verification
@@@0.00,5896@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 7 -n
FORMULA CSRepetitions-COL-02-UpperBounds-08 4 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3583
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.000943 on verification
@@@0.00,5808@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 8 -n
FORMULA CSRepetitions-COL-02-UpperBounds-10 4 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3583
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001085 on verification
@@@0.00,5684@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 9 -n
FORMULA CSRepetitions-COL-02-UpperBounds-12 4 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3583
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.001962 on verification
@@@0.00,5768@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 10 -n
FORMULA CSRepetitions-COL-02-UpperBounds-14 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Query index 0 was solved
Query is satisfied.
Spent 0.001327 on verification
@@@0.00,6008@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 10 -n
FORMULA CSRepetitions-COL-02-UpperBounds-14 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3583
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.000979 on verification
@@@0.00,6056@@@
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.06ZGo22J5S /home/mcc/BenchKit/bin/tmp/tmp.jx21WoQvCD --binary-query-io 1 -x 11 -n
FORMULA CSRepetitions-COL-02-UpperBounds-13 2 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3583
All queries are solved
Time left: 3583
terminated-with-cleanup
BK_STOP 1716278410838
--------------------
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="CSRepetitions-COL-02"
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 2-5568"
echo " Executing tool tapaal"
echo " Input is CSRepetitions-COL-02, 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 r074-tall-171620510700181"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/CSRepetitions-COL-02.tgz
mv CSRepetitions-COL-02 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 ;