Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2023-input.r247-tall-167856434500478.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-5348
Executing tool ltsminxred
Input is MultiCrashLeafsetExtension-PT-S16C04, examination is StableMarking
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r247-tall-167856434500478
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 4.6M
-rw-r--r-- 1 mcc users 11K Feb 26 02:30 CTLCardinality.txt
-rw-r--r-- 1 mcc users 66K Feb 26 02:30 CTLCardinality.xml
-rw-r--r-- 1 mcc users 8.5K Feb 26 02:26 CTLFireability.txt
-rw-r--r-- 1 mcc users 47K Feb 26 02:26 CTLFireability.xml
-rw-r--r-- 1 mcc users 5.8K Feb 25 16:24 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 25 16:24 LTLCardinality.xml
-rw-r--r-- 1 mcc users 4.3K Feb 25 16:24 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Feb 25 16:24 LTLFireability.xml
-rw-r--r-- 1 mcc users 24K Feb 26 02:38 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 146K Feb 26 02:38 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 17K Feb 26 02:34 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 78K Feb 26 02:34 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.5K Feb 25 16:24 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.5K Feb 25 16:24 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 7 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 4.1M Mar 5 18:22 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 1678714122930

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=StableMarking
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=MultiCrashLeafsetExtension-PT-S16C04
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-13 13:28:44] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, StableMarking, -timeout, 180, -rebuildPNML]
[2023-03-13 13:28:44] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-13 13:28:44] [INFO ] Load time of PNML (sax parser for PT used): 243 ms
[2023-03-13 13:28:44] [INFO ] Transformed 4260 places.
[2023-03-13 13:28:44] [INFO ] Transformed 6027 transitions.
[2023-03-13 13:28:44] [INFO ] Parsed PT model containing 4260 places and 6027 transitions and 23774 arcs in 337 ms.
Incomplete random walk after 10000 steps, including 239 resets, run finished after 2528 ms. (steps per millisecond=3 ) properties (out of 4260) seen :2398
Running SMT prover for 1862 properties.
[2023-03-13 13:28:47] [INFO ] Flow matrix only has 5755 transitions (discarded 272 similar events)
// Phase 1: matrix 5755 rows 4260 cols
[2023-03-13 13:28:47] [INFO ] Computed 497 place invariants in 291 ms
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:251)
at fr.lip6.move.gal.structural.smt.DeadlockTester.assertInvariants(DeadlockTester.java:2340)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:618)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMTIncremental(DeadlockTester.java:339)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMT(DeadlockTester.java:223)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.applyReductions(ReachabilitySolver.java:95)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.applyReachabilitySolver(GlobalPropertySolver.java:724)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.solveProperty(GlobalPropertySolver.java:558)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.preSolveLiveness(GlobalPropertySolver.java:412)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.preStableMarking(GlobalPropertySolver.java:321)
at fr.lip6.move.gal.application.solver.global.GlobalPropertySolver.solveProperty(GlobalPropertySolver.java:294)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:386)
at fr.lip6.move.gal.application.Application.start(Application.java:178)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
at org.eclipse.equinox.launcher.Main.main(Main.java:1440)
[2023-03-13 13:29:14] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2023-03-13 13:29:14] [INFO ] After 25089ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0
Fused 1862 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 1 ms.
Support contains 1862 out of 4260 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 4260/4260 places, 6027/6027 transitions.
Graph (complete) has 13889 edges and 4260 vertex of which 4232 are kept as prefixes of interest. Removing 28 places using SCC suffix rule.17 ms
Discarding 28 places :
Also discarding 0 output transitions
Drop transitions removed 537 transitions
Trivial Post-agglo rules discarded 537 transitions
Performed 537 trivial Post agglomeration. Transition count delta: 537
Iterating post reduction 0 with 537 rules applied. Total rules applied 538 place count 4232 transition count 5490
Reduce places removed 537 places and 0 transitions.
Iterating post reduction 1 with 537 rules applied. Total rules applied 1075 place count 3695 transition count 5490
Performed 115 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 115 Pre rules applied. Total rules applied 1075 place count 3695 transition count 5375
Deduced a syphon composed of 115 places in 5 ms
Reduce places removed 115 places and 0 transitions.
Iterating global reduction 2 with 230 rules applied. Total rules applied 1305 place count 3580 transition count 5375
Discarding 422 places :
Symmetric choice reduction at 2 with 422 rule applications. Total rules 1727 place count 3158 transition count 4953
Iterating global reduction 2 with 422 rules applied. Total rules applied 2149 place count 3158 transition count 4953
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 4 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 2 with 6 rules applied. Total rules applied 2155 place count 3155 transition count 4950
Free-agglomeration rule (complex) applied 282 times.
Iterating global reduction 2 with 282 rules applied. Total rules applied 2437 place count 3155 transition count 4668
Reduce places removed 282 places and 0 transitions.
Iterating post reduction 2 with 282 rules applied. Total rules applied 2719 place count 2873 transition count 4668
Partial Free-agglomeration rule applied 115 times.
Drop transitions removed 115 transitions
Iterating global reduction 3 with 115 rules applied. Total rules applied 2834 place count 2873 transition count 4668
Applied a total of 2834 rules in 1126 ms. Remains 2873 /4260 variables (removed 1387) and now considering 4668/6027 (removed 1359) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1128 ms. Remains : 2873/4260 places, 4668/6027 transitions.
Interrupted random walk after 370038 steps, including 13311 resets, run timeout after 30001 ms. (steps per millisecond=12 ) properties seen 1237
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 14 ms. (steps per millisecond=71 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 19 ms. (steps per millisecond=52 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 15 ms. (steps per millisecond=66 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 15 ms. (steps per millisecond=66 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 14 ms. (steps per millisecond=71 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 14 ms. (steps per millisecond=71 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 15 ms. (steps per millisecond=66 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 15 ms. (steps per millisecond=66 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 15 ms. (steps per millisecond=66 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=76 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 32 ms. (steps per millisecond=31 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 14 ms. (steps per millisecond=71 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 14 ms. (steps per millisecond=71 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=76 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 19 ms. (steps per millisecond=52 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=76 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 13 ms. (steps per millisecond=77 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1000 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Incomplete Best-First random walk after 1001 steps, including 6 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 625) seen :0
Running SMT prover for 625 properties.
[2023-03-13 13:29:45] [INFO ] Flow matrix only has 4380 transitions (discarded 288 similar events)
// Phase 1: matrix 4380 rows 2873 cols
[2023-03-13 13:29:45] [INFO ] Computed 469 place invariants in 75 ms
[2023-03-13 13:30:14] [INFO ] After 28285ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:625
[2023-03-13 13:30:38] [INFO ] [Nat]Absence check using 33 positive place invariants in 62 ms returned sat
[2023-03-13 13:30:38] [INFO ] [Nat]Absence check using 33 positive and 436 generalized place invariants in 116 ms returned sat
[2023-03-13 13:32:25] [INFO ] After 79867ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :625
[2023-03-13 13:32:25] [INFO ] State equation strengthened by 1634 read => feed constraints.
[2023-03-13 13:33:59] [INFO ] After 94461ms SMT Verify possible using 1634 Read/Feed constraints in natural domain returned unsat :211 sat :413
[2023-03-13 13:33:59] [INFO ] After 94472ms SMT Verify possible using trap constraints in natural domain returned unsat :211 sat :413
Attempting to minimize the solution found.
Minimization took 2 ms.
[2023-03-13 13:33:59] [INFO ] After 225044ms SMT Verify possible using all constraints in natural domain returned unsat :211 sat :413
FORMULA StableMarking TRUE TECHNIQUES RANDOM_WALK STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Total runtime 315188 ms.
ITS solved all properties within timeout

BK_STOP 1678714440676

--------------------
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:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ 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 StableMarking -timeout 180 -rebuildPNML

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="MultiCrashLeafsetExtension-PT-S16C04"
export BK_EXAMINATION="StableMarking"
export BK_TOOL="ltsminxred"
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 2-5348"
echo " Executing tool ltsminxred"
echo " Input is MultiCrashLeafsetExtension-PT-S16C04, 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 r247-tall-167856434500478"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/MultiCrashLeafsetExtension-PT-S16C04.tgz
mv MultiCrashLeafsetExtension-PT-S16C04 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.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property StableMarking.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -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 ;