fond
Model Checking Contest 2022
12th edition, Bergen, Norway, June 21, 2022
Execution of r003-tajo-165245683200594
Last Updated
Jun 22, 2022

About the Execution of Tapaal for BART-PT-002

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
344.787 153806.00 261402.00 77.70 FFFFTFFTFFFFTFFT 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/mcc2022-input.r003-tajo-165245683200594.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2022-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool tapaal
Input is BART-PT-002, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r003-tajo-165245683200594
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 2.5M
-rw-r--r-- 1 mcc users 124K Apr 29 20:05 CTLCardinality.txt
-rw-r--r-- 1 mcc users 440K Apr 29 20:05 CTLCardinality.xml
-rw-r--r-- 1 mcc users 145K Apr 29 19:56 CTLFireability.txt
-rw-r--r-- 1 mcc users 526K Apr 29 19:56 CTLFireability.xml
-rw-r--r-- 1 mcc users 5 May 10 09:33 equiv_col
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K May 10 09:33 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4 May 10 09:33 instance
-rw-r--r-- 1 mcc users 6 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 74K May 9 07:05 LTLCardinality.txt
-rw-r--r-- 1 mcc users 201K May 9 07:05 LTLCardinality.xml
-rw-r--r-- 1 mcc users 87K May 9 07:05 LTLFireability.txt
-rw-r--r-- 1 mcc users 228K May 9 07:05 LTLFireability.xml
-rw-r--r-- 1 mcc users 534K May 10 09:33 model.pnml
-rw-r--r-- 1 mcc users 29K May 9 07:05 UpperBounds.txt
-rw-r--r-- 1 mcc users 57K May 9 07:05 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 BART-PT-002-CTLFireability-00
FORMULA_NAME BART-PT-002-CTLFireability-01
FORMULA_NAME BART-PT-002-CTLFireability-02
FORMULA_NAME BART-PT-002-CTLFireability-03
FORMULA_NAME BART-PT-002-CTLFireability-04
FORMULA_NAME BART-PT-002-CTLFireability-05
FORMULA_NAME BART-PT-002-CTLFireability-06
FORMULA_NAME BART-PT-002-CTLFireability-07
FORMULA_NAME BART-PT-002-CTLFireability-08
FORMULA_NAME BART-PT-002-CTLFireability-09
FORMULA_NAME BART-PT-002-CTLFireability-10
FORMULA_NAME BART-PT-002-CTLFireability-11
FORMULA_NAME BART-PT-002-CTLFireability-12
FORMULA_NAME BART-PT-002-CTLFireability-13
FORMULA_NAME BART-PT-002-CTLFireability-14
FORMULA_NAME BART-PT-002-CTLFireability-15

=== Now, execution of the tool begins

BK_START 1652566887536

tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- 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.ZyjH4SOUCf
MF=/home/mcc/BenchKit/bin/tmp/tmp.GHfs3AFbxb
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.ZyjH4SOUCf --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.GHfs3AFbxb -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./CTLFireability.xml
FORMULA BART-PT-002-CTLFireability-05 FALSE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT LP_APPROX
Query index 5 was solved

Query is NOT satisfied.
Solution found by parallel simplification (step 0)
Time left: 3445

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (15 in total)
Each query is verified by 4 parallel strategies for 299 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 0.000308 on verification
@@@0.02,6544@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 1 -n

FORMULA BART-PT-002-CTLFireability-07 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 3445
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.055325 on verification
@@@0.56,59972@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 2 -n

FORMULA BART-PT-002-CTLFireability-14 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3444
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.056389 on verification
@@@0.52,59992@@@


Query index 0 was solved
Query is NOT satisfied.

Spent 0.061494 on verification
@@@0.50,59976@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 3 -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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 3 -n

FORMULA BART-PT-002-CTLFireability-10 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3443
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.068931 on verification
@@@0.13,60524@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 4 -n

FORMULA BART-PT-002-CTLFireability-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3443
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.157292 on verification
@@@0.21,60580@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 5 -n

FORMULA BART-PT-002-CTLFireability-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3442
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.874149 on verification
@@@0.89,85380@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 6 -n

FORMULA BART-PT-002-CTLFireability-08 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3441
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.064086 on verification
@@@0.07,60600@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 7 -n

FORMULA BART-PT-002-CTLFireability-11 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3441
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.07249 on verification
@@@0.08,60632@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 8 -n

FORMULA BART-PT-002-CTLFireability-13 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3440
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.074163 on verification
@@@0.08,60572@@@


Query index 0 was solved
Query is satisfied.

Spent 0.068613 on verification
@@@0.08,60588@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --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\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 9 -n

FORMULA BART-PT-002-CTLFireability-12 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3440
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.826489 on verification
@@@0.85,85336@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 10 -n

FORMULA BART-PT-002-CTLFireability-15 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3439
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.070316 on verification
@@@0.08,60600@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 11 -n

FORMULA BART-PT-002-CTLFireability-09 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3438
------------------- QUERY 12 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.106506 on verification
@@@0.11,60560@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 12 -n

FORMULA BART-PT-002-CTLFireability-03 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3438
------------------- QUERY 13 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.118682 on verification
@@@0.14,60648@@@


Query index 0 was solved
Query is NOT satisfied.

Spent 0.132796 on verification
@@@0.14,60680@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 13 -n

FORMULA BART-PT-002-CTLFireability-06 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3438
------------------- QUERY 14 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is satisfied.

Spent 0.138662 on verification
@@@0.15,60384@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 14 -n

FORMULA BART-PT-002-CTLFireability-04 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3437
------------------- QUERY 15 ----------------------
Solution found by parallel processing (step 1)


Query index 0 was solved
Query is NOT satisfied.

Spent 0.769835 on verification
@@@0.78,66516@@@
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.GHfs3AFbxb /home/mcc/BenchKit/bin/tmp/tmp.ZyjH4SOUCf --binary-query-io 1 -x 15 -n

FORMULA BART-PT-002-CTLFireability-01 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3436
All queries are solved
Time left: 3436
terminated-with-cleanup

BK_STOP 1652567041342

--------------------
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="BART-PT-002"
export BK_EXAMINATION="CTLFireability"
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 2-4028"
echo " Executing tool tapaal"
echo " Input is BART-PT-002, 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 r003-tajo-165245683200594"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BART-PT-002.tgz
mv BART-PT-002 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 '' CTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
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 ;