fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r425-tajo-167905977700086
Last Updated
May 14, 2023

About the Execution of LTSMin+red for ShieldRVs-PT-010A

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
185.176 5666.00 15276.00 65.80 FFTTTTTFTTTTTFFF 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/mcc2023-input.r425-tajo-167905977700086.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2023-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5348
Executing tool ltsminxred
Input is ShieldRVs-PT-010A, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r425-tajo-167905977700086
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 500K
-rw-r--r-- 1 mcc users 6.4K Feb 26 18:36 CTLCardinality.txt
-rw-r--r-- 1 mcc users 65K Feb 26 18:36 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.4K Feb 26 18:30 CTLFireability.txt
-rw-r--r-- 1 mcc users 38K Feb 26 18:30 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.3K Feb 25 17:02 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 25 17:02 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Feb 25 17:02 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 17:02 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K Feb 26 18:43 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 133K Feb 26 18:43 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.9K Feb 26 18:39 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 67K Feb 26 18:39 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:02 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Feb 25 17:02 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 63K Mar 5 18:23 model.pnml

--------------------
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 ShieldRVs-PT-010A-ReachabilityCardinality-00
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-01
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-02
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-03
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-04
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-05
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-06
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-07
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-08
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-09
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-10
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-11
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-12
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-13
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-14
FORMULA_NAME ShieldRVs-PT-010A-ReachabilityCardinality-15

=== Now, execution of the tool begins

BK_START 1679295258146

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=ShieldRVs-PT-010A
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-20 06:54:19] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -timeout, 360, -rebuildPNML]
[2023-03-20 06:54:19] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-20 06:54:20] [INFO ] Load time of PNML (sax parser for PT used): 50 ms
[2023-03-20 06:54:20] [INFO ] Transformed 143 places.
[2023-03-20 06:54:20] [INFO ] Transformed 193 transitions.
[2023-03-20 06:54:20] [INFO ] Found NUPN structural information;
[2023-03-20 06:54:20] [INFO ] Parsed PT model containing 143 places and 193 transitions and 920 arcs in 116 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 16 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 1 formulas.
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-15 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 69 resets, run finished after 232 ms. (steps per millisecond=43 ) properties (out of 9) seen :8
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-14 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-07 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-06 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-00 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Finished Best-First random walk after 2028 steps, including 1 resets, run visited all 1 properties in 16 ms. (steps per millisecond=126 )
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-04 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
All properties solved without resorting to model-checking.
Total runtime 444 ms.
pnml2lts-sym model.pnml --lace-workers=4 --vset=lddmc --saturation=sat -rbs,w2W,ru,hf --sylvan-sizes=20,28,20,28 --invariant=/tmp/442/inv_0_ --invariant=/tmp/442/inv_1_ --invariant=/tmp/442/inv_2_ --invariant=/tmp/442/inv_3_ --invariant=/tmp/442/inv_4_ --invariant=/tmp/442/inv_5_ --invariant=/tmp/442/inv_6_ --invariant=/tmp/442/inv_7_ --invariant=/tmp/442/inv_8_ --invariant=/tmp/442/inv_9_ --invariant=/tmp/442/inv_10_ --invariant=/tmp/442/inv_11_ --invariant=/tmp/442/inv_12_ --invariant=/tmp/442/inv_13_ --invariant=/tmp/442/inv_14_ --invariant=/tmp/442/inv_15_ --inv-par
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-00 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-01 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-02 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-03 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-04 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-05 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-06 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-07 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-08 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-09 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-10 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-11 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-12 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-13 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-14 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA ShieldRVs-PT-010A-ReachabilityCardinality-15 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN

BK_STOP 1679295263812

--------------------
content from stderr:

+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -timeout 360 -rebuildPNML
mcc2023
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-00
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_0_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-01
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_1_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-02
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_2_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-03
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_3_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-04
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_4_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-05
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_5_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-06
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_6_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-07
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_7_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-08
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_8_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-09
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_9_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-10
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_10_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-11
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_11_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-12
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_12_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-13
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_13_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-14
rfs formula type AG
rfs formula formula --invariant=/tmp/442/inv_14_
rfs formula name ShieldRVs-PT-010A-ReachabilityCardinality-15
rfs formula type EF
rfs formula formula --invariant=/tmp/442/inv_15_
pnml2lts-sym: Exploration order is bfs-prev
pnml2lts-sym: Saturation strategy is sat
pnml2lts-sym: Guided search strategy is unguided
pnml2lts-sym: Attractor strategy is default
pnml2lts-sym: opening model.pnml
pnml2lts-sym: Edge label is id
Warning: program compiled against libxml 210 using older 209
pnml2lts-sym: Petri net has 143 places, 193 transitions and 920 arcs
pnml2lts-sym: Petri net ShieldRVs-PT-010A analyzed
pnml2lts-sym: There are safe places
pnml2lts-sym: Loading Petri net took 0.000 real 0.000 user 0.000 sys
pnml2lts-sym: Initializing regrouping layer
pnml2lts-sym: Regroup specification: bs,w2W,ru,hf
pnml2lts-sym: Regroup Boost's Sloan
pnml2lts-sym: Regroup over-approximate must-write to may-write
pnml2lts-sym: Regroup Row sUbsume
pnml2lts-sym: Reqroup Horizontal Flip
pnml2lts-sym: Regrouping: 193->133 groups
pnml2lts-sym: Regrouping took 0.030 real 0.020 user 0.000 sys
pnml2lts-sym: state vector length is 143; there are 133 groups
pnml2lts-sym: Creating a multi-core ListDD domain.
pnml2lts-sym: Sylvan allocates 15.000 GB virtual memory for nodes table and operation cache.
pnml2lts-sym: Initial nodes table and operation cache requires 60.00 MB.
pnml2lts-sym: Using GBgetTransitionsShortR2W as next-state function
pnml2lts-sym: got initial state
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_13_) found at depth 0!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_3_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_2_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_14_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_12_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym: vset_sylvan: starting garbage collection
pnml2lts-sym: vset_sylvan: garbage collection done
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_10_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_7_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_6_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_0_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/442/inv_4_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym: Exploration took 87007 group checks and 0 next state calls
pnml2lts-sym: reachability took 2.660 real 10.430 user 0.150 sys
pnml2lts-sym: counting visited states...
pnml2lts-sym: counting took 0.010 real 0.030 user 0.000 sys
pnml2lts-sym: state space has 1.12139453916293e+20 states, 17960 nodes
pnml2lts-sym: group_next: 2024 nodes total
pnml2lts-sym: group_explored: 760 nodes, 992 short vectors total
pnml2lts-sym: max token count: 1

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="ShieldRVs-PT-010A"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="ltsminxred"
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 ltsminxred"
echo " Input is ShieldRVs-PT-010A, 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 r425-tajo-167905977700086"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ShieldRVs-PT-010A.tgz
mv ShieldRVs-PT-010A execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "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 [ "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
elif [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
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 ;