Execution Chart

We display below the execution chart for this examination (boot time has been removed).

Trace from the execution

Formatting '/data/fkordon/mcc2026-input.r152-tall-177961077500333.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2026-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 2-5973
Executing tool itstools
Input is GPUForwardProgress-PT-40b, examination is StableMarking
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r152-tall-177961077500333
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 580K
-rw-r--r-- 1 mcc users 6.5K Mar 7 11:29 CTLCardinality.txt
-rw-r--r-- 1 mcc users 69K Mar 7 11:29 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.3K Mar 7 11:29 CTLFireability.txt
-rw-r--r-- 1 mcc users 45K Mar 7 11:29 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.1K Mar 15 10:40 LTLCardinality.txt
-rw-r--r-- 1 mcc users 29K Mar 15 10:40 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Mar 15 10:40 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K Mar 15 10:40 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.1K Mar 7 11:29 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 78K Mar 7 11:29 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.2K Mar 7 11:29 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 57K Mar 7 11:29 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Mar 15 10:40 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Mar 15 10:40 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 199K Mar 3 18:30 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

FORMULA_NAME StableMarking

=== Now, execution of the tool begins

BK_START 1779701098800

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=StableMarking
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=GPUForwardProgress-PT-40b
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
StableMarking PT
Running Version 202604301425
[2026-05-25 09:24:59] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, StableMarking, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2026-05-25 09:25:00] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-25 09:25:00] [INFO ] Load time of PNML (sax parser for PT used): 107 ms
[2026-05-25 09:25:00] [INFO ] Transformed 796 places.
[2026-05-25 09:25:00] [INFO ] Transformed 837 transitions.
[2026-05-25 09:25:00] [INFO ] Found NUPN structural information;
[2026-05-25 09:25:00] [INFO ] Parsed PT model containing 796 places and 837 transitions and 2077 arcs in 211 ms.
Graph (trivial) has 714 edges and 796 vertex of which 7 / 796 are part of one of the 1 SCC in 33 ms
Free SCC test removed 6 places
Structural test allowed to assert that 377 places are NOT stable. Took 54 ms.
Ensure Unique test removed 7 transitions
Reduce redundant transitions removed 7 transitions.
[2026-05-25 09:25:00] [INFO ] Flatten gal took : 218 ms
[2026-05-25 09:25:01] [INFO ] Flatten gal took : 78 ms
[2026-05-25 09:25:01] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality205850567560169289.gal : 44 ms
[2026-05-25 09:25:01] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality5507958799037026525.prop : 4 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality205850567560169289.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality5507958799037026525.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...327
Loading property file /tmp/ReachabilityCardinality5507958799037026525.prop.
RANDOM walk for 40000 steps (119 resets) in 2951 ms. (13 steps per ms) remains 359/419 properties
BEST_FIRST walk for 403 steps (8 resets) in 16 ms. (23 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 13 ms. (28 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 10 ms. (36 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 18 ms. (21 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 11 ms. (33 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 401 steps (8 resets) in 10 ms. (36 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 11 ms. (33 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 401 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 10 ms. (36 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 13 ms. (28 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 5 ms. (67 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 5 ms. (67 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 403 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
BEST_FIRST walk for 400 steps (8 resets) in 9 ms. (40 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 8 ms. (44 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 10 ms. (36 steps per ms) remains 359/359 properties
BEST_FIRST walk for 402 steps (8 resets) in 7 ms. (50 steps per ms) remains 359/359 properties
BEST_FIRST walk for 404 steps (8 resets) in 6 ms. (57 steps per ms) remains 359/359 properties
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-16318540983554170481.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-1171782130508819584.kers'
[2026-05-25 09:25:01] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-16318540983554170481.kers, --Pflows, --basisKERS=/tmp/petrispot-output-1171782130508819584.kers]
Normalized transition count is 829 out of 830 initially.
Culling duplicate invariants (modulo rational): removing 1 columns.
Culled 1 columns in 0 ms.
// Phase 1: matrix 829 rows 789 cols 2059 entries
Finished phase 1 with 747 SingleSign rule and 1 generalized
[2026-05-25 09:25:01] [INFO ] Computed 42 invariants in 3 ms
Computed 42 P flows in 4 ms.
Exported basis to /tmp/petrispot-output-1171782130508819584.kers
Total runtime 4 ms.
[2026-05-25 09:25:01] [INFO ] State equation strengthened by 1 read => feed constraints.
SDD proceeding with computation,419 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,419 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,419 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,419 properties remain. new max is 32
SDD size :19 after 36
SDD proceeding with computation,419 properties remain. new max is 64
SDD size :36 after 73
SDD proceeding with computation,419 properties remain. new max is 128
SDD size :73 after 4207
SDD proceeding with computation,419 properties remain. new max is 256
SDD size :4207 after 1.09292e+09
SDD proceeding with computation,419 properties remain. new max is 512
SDD size :1.09292e+09 after 9.38808e+18
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/359 variables, 359/359 constraints. Problems are: Problem set: 0 solved, 359 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/359 variables, 1/360 constraints. Problems are: Problem set: 0 solved, 359 unsolved
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 359/1620 variables, and 360 constraints, problems are : Problem set: 0 solved, 359 unsolved in 5044 ms.
Refiners :[Domain max(s): 359/790 constraints, Generalized P Invariants (flows): 1/42 constraints, State Equation: 0/790 constraints, ReadFeed: 0/1 constraints, PredecessorRefiner: 359/359 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 359 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/359 variables, 359/359 constraints. Problems are: Problem set: 0 solved, 359 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/359 variables, 1/360 constraints. Problems are: Problem set: 0 solved, 359 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/359 variables, 0/360 constraints. Problems are: Problem set: 0 solved, 359 unsolved
At refinement iteration 3 (OVERLAPS) 430/789 variables, 41/401 constraints. Problems are: Problem set: 0 solved, 359 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/789 variables, 430/831 constraints. Problems are: Problem set: 0 solved, 359 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 789/1620 variables, and 831 constraints, problems are : Problem set: 0 solved, 359 unsolved in 5018 ms.
Refiners :[Domain max(s): 789/790 constraints, Generalized P Invariants (flows): 42/42 constraints, State Equation: 0/790 constraints, ReadFeed: 0/1 constraints, PredecessorRefiner: 0/359 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 10207ms problems are : Problem set: 0 solved, 359 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 359 out of 790 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 790/790 places, 830/830 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 241 transitions
Trivial Post-agglo rules discarded 241 transitions
Performed 241 trivial Post agglomeration. Transition count delta: 241
Iterating post reduction 0 with 242 rules applied. Total rules applied 242 place count 790 transition count 588
Reduce places removed 241 places and 0 transitions.
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 1 with 244 rules applied. Total rules applied 486 place count 549 transition count 585
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 487 place count 548 transition count 585
Performed 41 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 41 Pre rules applied. Total rules applied 487 place count 548 transition count 544
Deduced a syphon composed of 41 places in 2 ms
Reduce places removed 41 places and 0 transitions.
Iterating global reduction 3 with 82 rules applied. Total rules applied 569 place count 507 transition count 544
Discarding 2 places :
Symmetric choice reduction at 3 with 2 rule applications. Total rules 571 place count 505 transition count 542
Iterating global reduction 3 with 2 rules applied. Total rules applied 573 place count 505 transition count 542
Performed 83 Post agglomeration using F-continuation condition.Transition count delta: 83
Deduced a syphon composed of 83 places in 0 ms
Reduce places removed 83 places and 0 transitions.
Iterating global reduction 3 with 166 rules applied. Total rules applied 739 place count 422 transition count 459
Drop transitions (Empty/Sink Transition effects.) removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 740 place count 422 transition count 458
Free-agglomeration rule applied 3 times.
Iterating global reduction 4 with 3 rules applied. Total rules applied 743 place count 422 transition count 455
Reduce places removed 3 places and 0 transitions.
Iterating post reduction 4 with 3 rules applied. Total rules applied 746 place count 419 transition count 455
Partial Free-agglomeration rule applied 6 times.
Drop transitions (Partial Free agglomeration) removed 6 transitions
Iterating global reduction 5 with 6 rules applied. Total rules applied 752 place count 419 transition count 455
Partial Post-agglomeration rule applied 2 times.
Drop transitions (Partial Post agglomeration) removed 2 transitions
Iterating global reduction 5 with 2 rules applied. Total rules applied 754 place count 419 transition count 455
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 5 with 1 rules applied. Total rules applied 755 place count 418 transition count 454
Applied a total of 755 rules in 226 ms. Remains 418 /790 variables (removed 372) and now considering 454/830 (removed 376) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 243 ms. Remains : 418/790 places, 454/830 transitions.
RANDOM walk for 129990 steps (741 resets) in 1463 ms. (88 steps per ms) remains 0/359 properties
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
Able to resolve query StableMarking after proving 421 properties.
FORMULA StableMarking FALSE TECHNIQUES RANDOM_WALK MARKED_SUFFIX_TEST TRIVIAL_UNMARKED_SCC_TEST TOPOLOGICAL
Total runtime 12475 ms.

BK_STOP 1779701112502

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ StableMarking = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution StableMarking -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202604301425.jar
+ VERSION=202604301425
+ echo 'Running Version 202604301425'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination StableMarking -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800

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="GPUForwardProgress-PT-40b"
export BK_EXAMINATION="StableMarking"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
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 2-5973"
echo " Executing tool itstools"
echo " Input is GPUForwardProgress-PT-40b, examination is StableMarking"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r152-tall-177961077500333"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/GPUForwardProgress-PT-40b.tgz
mv GPUForwardProgress-PT-40b execution
cd execution
if [ "StableMarking" = "ReachabilityDeadlock" ] || [ "StableMarking" = "UpperBounds" ] || [ "StableMarking" = "QuasiLiveness" ] || [ "StableMarking" = "StableMarking" ] || [ "StableMarking" = "Liveness" ] || [ "StableMarking" = "OneSafe" ] || [ "StableMarking" = "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 [ "StableMarking" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "StableMarking" != "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 "StableMarking.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 '' StableMarking.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "StableMarking" = "ReachabilityDeadlock" ] || [ "StableMarking" = "QuasiLiveness" ] || [ "StableMarking" = "StableMarking" ] || [ "StableMarking" = "Liveness" ] || [ "StableMarking" = "OneSafe" ] ; then
echo "FORMULA_NAME StableMarking"
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 ;