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Model Checking Contest 2021
11th edition, Paris, France, June 23, 2021
Execution of r254-tall-162106745500092
Last Updated
Jun 28, 2021

About the Execution of ITS-Tools for SmallOperatingSystem-PT-MT1024DC0256

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
247.979 5380.00 9098.00 197.40 FFTTTFFFFFFFFTFF normal

Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2021-input.r254-tall-162106745500092.qcow2', fmt=qcow2 size=4294967296 backing_file='/data/fkordon/mcc2021-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 itstools
Input is SmallOperatingSystem-PT-MT1024DC0256, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r254-tall-162106745500092
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 428K
-rw-r--r-- 1 mcc users 18K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 111K May 10 09:44 CTLCardinality.xml
-rw-r--r-- 1 mcc users 18K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 121K May 10 09:44 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.7K May 6 14:48 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.9K Mar 28 16:42 LTLCardinality.txt
-rw-r--r-- 1 mcc users 22K Mar 28 16:42 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Mar 28 16:42 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K Mar 28 16:42 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.1K Mar 27 13:41 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 17K Mar 27 13:41 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.4K Mar 25 19:28 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 17K Mar 25 19:28 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.0K Mar 22 08:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.1K Mar 22 08:16 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 5 16:52 equiv_col
-rw-r--r-- 1 mcc users 13 May 5 16:52 instance
-rw-r--r-- 1 mcc users 6 May 5 16:52 iscolored
-rw-r--r-- 1 mcc users 8.1K May 5 16:52 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 SmallOperatingSystem-PT-MT1024DC0256-00
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-01
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-02
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-03
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-04
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-05
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-06
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-07
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-08
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-09
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-10
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-11
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-12
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-13
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-14
FORMULA_NAME SmallOperatingSystem-PT-MT1024DC0256-15

=== Now, execution of the tool begins

BK_START 1621152627092

Running Version 0
[2021-05-16 08:10:28] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2021-05-16 08:10:28] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-16 08:10:28] [INFO ] Load time of PNML (sax parser for PT used): 20 ms
[2021-05-16 08:10:28] [INFO ] Transformed 9 places.
[2021-05-16 08:10:28] [INFO ] Transformed 8 transitions.
[2021-05-16 08:10:28] [INFO ] Parsed PT model containing 9 places and 8 transitions in 53 ms.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 11 ms.
Working with output stream class java.io.PrintStream
[2021-05-16 08:10:28] [INFO ] Initial state test concluded for 1 properties.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-03 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 9 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Applied a total of 0 rules in 32 ms. Remains 9 /9 variables (removed 0) and now considering 8/8 (removed 0) transitions.
// Phase 1: matrix 8 rows 9 cols
[2021-05-16 08:10:28] [INFO ] Computed 4 place invariants in 4 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants in 64 ms returned []
// Phase 1: matrix 8 rows 9 cols
[2021-05-16 08:10:29] [INFO ] Computed 4 place invariants in 1 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants and state equation in 30 ms returned []
Implicit Place search using SMT with State Equation took 123 ms to find 0 implicit places.
// Phase 1: matrix 8 rows 9 cols
[2021-05-16 08:10:29] [INFO ] Computed 4 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Dead Transitions using invariants and state equation in 37 ms returned []
Finished structural reductions, in 1 iterations. Remains : 9/9 places, 8/8 transitions.
[2021-05-16 08:10:29] [INFO ] Initial state reduction rules for LTL removed 3 formulas.
[2021-05-16 08:10:29] [INFO ] Flatten gal took : 15 ms
FORMULA SmallOperatingSystem-PT-MT1024DC0256-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SmallOperatingSystem-PT-MT1024DC0256-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SmallOperatingSystem-PT-MT1024DC0256-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-05-16 08:10:29] [INFO ] Flatten gal took : 3 ms
[2021-05-16 08:10:29] [INFO ] Input system was already deterministic with 8 transitions.
Incomplete random walk after 100431 steps, including 2 resets, run finished after 42 ms. (steps per millisecond=2391 ) properties (out of 15) seen :13
Running SMT prover for 2 properties.
// Phase 1: matrix 8 rows 9 cols
[2021-05-16 08:10:29] [INFO ] Computed 4 place invariants in 2 ms
[2021-05-16 08:10:29] [INFO ] [Real]Absence check using 4 positive place invariants in 1 ms returned unsat
[2021-05-16 08:10:29] [INFO ] [Real]Absence check using 4 positive place invariants in 0 ms returned unsat
Successfully simplified 2 atomic propositions for a total of 12 simplifications.
[2021-05-16 08:10:29] [INFO ] Initial state test concluded for 1 properties.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(X(G((p0||X(p0)))))], workingDir=/home/mcc/execution]
Support contains 2 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 8
Applied a total of 1 rules in 1 ms. Remains 8 /9 variables (removed 1) and now considering 8/8 (removed 0) transitions.
// Phase 1: matrix 8 rows 8 cols
[2021-05-16 08:10:29] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants in 12 ms returned []
// Phase 1: matrix 8 rows 8 cols
[2021-05-16 08:10:29] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants and state equation in 15 ms returned []
Implicit Place search using SMT with State Equation took 28 ms to find 0 implicit places.
// Phase 1: matrix 8 rows 8 cols
[2021-05-16 08:10:29] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:29] [INFO ] Dead Transitions using invariants and state equation in 19 ms returned []
Finished structural reductions, in 1 iterations. Remains : 8/9 places, 8/8 transitions.
Stuttering acceptance computed with spot in 213 ms :[(NOT p0), (NOT p0), (NOT p0), true]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-00 automaton TGBA [mat=[[{ cond=p0, acceptance={} source=0 dest: 2}, { cond=(NOT p0), acceptance={} source=0 dest: 3}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 0}, { cond=p0, acceptance={} source=2 dest: 2}], [{ cond=true, acceptance={0} source=3 dest: 3}]], initial=1, aps=[p0:(LEQ s2 s7)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, terminal, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 101 steps with 0 reset in 2 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-00 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-00 finished in 303 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(X(G(p0)))], workingDir=/home/mcc/execution]
Support contains 2 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 8
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 2 place count 7 transition count 7
Iterating global reduction 1 with 1 rules applied. Total rules applied 3 place count 7 transition count 7
Applied a total of 3 rules in 2 ms. Remains 7 /9 variables (removed 2) and now considering 7/8 (removed 1) transitions.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:29] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants in 10 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:29] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants and state equation in 11 ms returned []
Implicit Place search using SMT with State Equation took 22 ms to find 0 implicit places.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:29] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Dead Transitions using invariants and state equation in 14 ms returned []
Finished structural reductions, in 1 iterations. Remains : 7/9 places, 7/8 transitions.
Stuttering acceptance computed with spot in 55 ms :[true, (NOT p0), (NOT p0)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-01 automaton TGBA [mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 0}, { cond=p0, acceptance={} source=2 dest: 2}]], initial=1, aps=[p0:(GT s5 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Entered a terminal (fully accepting) state of product in 18697 steps with 0 reset in 66 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-01 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-01 finished in 169 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(G(p0))], workingDir=/home/mcc/execution]
Support contains 1 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 7
Reduce places removed 1 places and 0 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 2 rules applied. Total rules applied 3 place count 7 transition count 6
Reduce places removed 2 places and 0 transitions.
Graph (trivial) has 2 edges and 5 vertex of which 2 / 5 are part of one of the 1 SCC in 1 ms
Free SCC test removed 1 places
Iterating post reduction 2 with 3 rules applied. Total rules applied 6 place count 4 transition count 6
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 7 place count 4 transition count 5
Applied a total of 7 rules in 9 ms. Remains 4 /9 variables (removed 5) and now considering 5/8 (removed 3) transitions.
// Phase 1: matrix 5 rows 4 cols
[2021-05-16 08:10:29] [INFO ] Computed 2 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants in 9 ms returned []
// Phase 1: matrix 5 rows 4 cols
[2021-05-16 08:10:29] [INFO ] Computed 2 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants and state equation in 18 ms returned []
Implicit Place search using SMT with State Equation took 30 ms to find 0 implicit places.
[2021-05-16 08:10:29] [INFO ] Redundant transitions in 0 ms returned []
// Phase 1: matrix 5 rows 4 cols
[2021-05-16 08:10:29] [INFO ] Computed 2 place invariants in 1 ms
[2021-05-16 08:10:29] [INFO ] Dead Transitions using invariants and state equation in 12 ms returned []
Finished structural reductions, in 1 iterations. Remains : 4/9 places, 5/8 transitions.
Stuttering acceptance computed with spot in 33 ms :[true, (NOT p0)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-05 automaton TGBA [mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=(NOT p0), acceptance={} source=1 dest: 0}, { cond=p0, acceptance={} source=1 dest: 1}]], initial=1, aps=[p0:(GT 1 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null][true, true]]
Entered a terminal (fully accepting) state of product in 3 steps with 0 reset in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-05 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-05 finished in 97 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(G((p0&&X((p0&&F(p1))))))], workingDir=/home/mcc/execution]
Support contains 4 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 1 place count 8 transition count 7
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 8 transition count 7
Applied a total of 2 rules in 1 ms. Remains 8 /9 variables (removed 1) and now considering 7/8 (removed 1) transitions.
// Phase 1: matrix 7 rows 8 cols
[2021-05-16 08:10:29] [INFO ] Computed 4 place invariants in 0 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants in 17 ms returned []
// Phase 1: matrix 7 rows 8 cols
[2021-05-16 08:10:29] [INFO ] Computed 4 place invariants in 1 ms
[2021-05-16 08:10:29] [INFO ] Implicit Places using invariants and state equation in 14 ms returned []
Implicit Place search using SMT with State Equation took 32 ms to find 0 implicit places.
// Phase 1: matrix 7 rows 8 cols
[2021-05-16 08:10:29] [INFO ] Computed 4 place invariants in 1 ms
[2021-05-16 08:10:29] [INFO ] Dead Transitions using invariants and state equation in 15 ms returned []
Finished structural reductions, in 1 iterations. Remains : 8/9 places, 7/8 transitions.
Stuttering acceptance computed with spot in 97 ms :[(OR (NOT p0) (NOT p1)), true, (AND (NOT p1) p0), (NOT p1)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-06 automaton TGBA [mat=[[{ cond=p0, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=p0, acceptance={} source=0 dest: 2}], [{ cond=true, acceptance={0} source=1 dest: 1}], [{ cond=(AND p0 (NOT p1)), acceptance={} source=2 dest: 3}], [{ cond=(NOT p1), acceptance={0} source=3 dest: 3}]], initial=0, aps=[p0:(LEQ s7 s6), p1:(OR (GT s7 s6) (LEQ s0 s2))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Product exploration explored 100000 steps with 9 reset in 164 ms.
Stack based approach found an accepted trace after 11 steps with 0 reset with depth 12 and stack size 12 in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-06 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-06 finished in 319 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(X(G(p0)))], workingDir=/home/mcc/execution]
Support contains 1 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 8
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 2 place count 7 transition count 7
Iterating global reduction 1 with 1 rules applied. Total rules applied 3 place count 7 transition count 7
Applied a total of 3 rules in 0 ms. Remains 7 /9 variables (removed 2) and now considering 7/8 (removed 1) transitions.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants in 9 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 5 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants and state equation in 19 ms returned []
Implicit Place search using SMT with State Equation took 29 ms to find 0 implicit places.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 3 ms
[2021-05-16 08:10:30] [INFO ] Dead Transitions using invariants and state equation in 16 ms returned []
Finished structural reductions, in 1 iterations. Remains : 7/9 places, 7/8 transitions.
Stuttering acceptance computed with spot in 55 ms :[true, (NOT p0), (NOT p0)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-07 automaton TGBA [mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 0}, { cond=p0, acceptance={} source=2 dest: 2}]], initial=1, aps=[p0:(GT 1 s5)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-07 finished in 111 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(G((F(G(p0))&&F(p1))))], workingDir=/home/mcc/execution]
Support contains 2 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 7
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 2 place count 7 transition count 7
Applied a total of 2 rules in 1 ms. Remains 7 /9 variables (removed 2) and now considering 7/8 (removed 1) transitions.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants in 9 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants and state equation in 16 ms returned []
Implicit Place search using SMT with State Equation took 26 ms to find 0 implicit places.
[2021-05-16 08:10:30] [INFO ] Redundant transitions in 0 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Dead Transitions using invariants and state equation in 21 ms returned []
Finished structural reductions, in 1 iterations. Remains : 7/9 places, 7/8 transitions.
Stuttering acceptance computed with spot in 84 ms :[(OR (NOT p0) (NOT p1)), (NOT p0), (NOT p1)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-08 automaton TGBA [mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}, { cond=p0, acceptance={} source=1 dest: 1}], [{ cond=(NOT p1), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p0:(GT 2 s5), p1:(LEQ 3 s6)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null][true, true, true]]
Product exploration explored 100000 steps with 35 reset in 128 ms.
Stack based approach found an accepted trace after 8 steps with 1 reset with depth 5 and stack size 5 in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-08 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-08 finished in 275 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(G(F(p0)))], workingDir=/home/mcc/execution]
Support contains 1 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 7
Reduce places removed 1 places and 0 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 2 rules applied. Total rules applied 3 place count 7 transition count 6
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 2 with 2 rules applied. Total rules applied 5 place count 5 transition count 6
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 3 with 3 rules applied. Total rules applied 8 place count 3 transition count 5
Graph (trivial) has 3 edges and 3 vertex of which 2 / 3 are part of one of the 1 SCC in 0 ms
Free SCC test removed 1 places
Iterating global reduction 3 with 1 rules applied. Total rules applied 9 place count 2 transition count 5
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 3 with 2 rules applied. Total rules applied 11 place count 2 transition count 3
Applied a total of 11 rules in 2 ms. Remains 2 /9 variables (removed 7) and now considering 3/8 (removed 5) transitions.
// Phase 1: matrix 3 rows 2 cols
[2021-05-16 08:10:30] [INFO ] Computed 1 place invariants in 1 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants in 17 ms returned []
// Phase 1: matrix 3 rows 2 cols
[2021-05-16 08:10:30] [INFO ] Computed 1 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] State equation strengthened by 1 read => feed constraints.
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants and state equation in 9 ms returned []
Implicit Place search using SMT with State Equation took 26 ms to find 0 implicit places.
[2021-05-16 08:10:30] [INFO ] Redundant transitions in 0 ms returned []
// Phase 1: matrix 3 rows 2 cols
[2021-05-16 08:10:30] [INFO ] Computed 1 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Dead Transitions using invariants and state equation in 11 ms returned []
Finished structural reductions, in 1 iterations. Remains : 2/9 places, 3/8 transitions.
Stuttering acceptance computed with spot in 46 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-09 automaton TGBA [mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(GT 2 s0)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null][true, true]]
Stuttering criterion allowed to conclude after 1 steps with 0 reset in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-09 finished in 104 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(F(G(!p0)))], workingDir=/home/mcc/execution]
Support contains 1 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 7
Reduce places removed 1 places and 0 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 2 rules applied. Total rules applied 3 place count 7 transition count 6
Reduce places removed 2 places and 0 transitions.
Graph (trivial) has 2 edges and 5 vertex of which 2 / 5 are part of one of the 1 SCC in 0 ms
Free SCC test removed 1 places
Iterating post reduction 2 with 3 rules applied. Total rules applied 6 place count 4 transition count 6
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 7 place count 4 transition count 5
Applied a total of 7 rules in 2 ms. Remains 4 /9 variables (removed 5) and now considering 5/8 (removed 3) transitions.
// Phase 1: matrix 5 rows 4 cols
[2021-05-16 08:10:30] [INFO ] Computed 2 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants in 11 ms returned []
// Phase 1: matrix 5 rows 4 cols
[2021-05-16 08:10:30] [INFO ] Computed 2 place invariants in 2 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants and state equation in 15 ms returned []
Implicit Place search using SMT with State Equation took 28 ms to find 0 implicit places.
[2021-05-16 08:10:30] [INFO ] Redundant transitions in 0 ms returned []
// Phase 1: matrix 5 rows 4 cols
[2021-05-16 08:10:30] [INFO ] Computed 2 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Dead Transitions using invariants and state equation in 8 ms returned []
Finished structural reductions, in 1 iterations. Remains : 4/9 places, 5/8 transitions.
Stuttering acceptance computed with spot in 46 ms :[p0]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-11 automaton TGBA [mat=[[{ cond=(NOT p0), acceptance={} source=0 dest: 0}, { cond=p0, acceptance={0} source=0 dest: 0}]], initial=0, aps=[p0:(GT 1 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null][true]]
Stuttering criterion allowed to conclude after 0 steps with 0 reset in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-11 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-11 finished in 107 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(G(p0))], workingDir=/home/mcc/execution]
Support contains 2 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 1 place count 7 transition count 7
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 7 transition count 7
Applied a total of 2 rules in 1 ms. Remains 7 /9 variables (removed 2) and now considering 7/8 (removed 1) transitions.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:30] [INFO ] Implicit Places using invariants in 118 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:30] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:31] [INFO ] Implicit Places using invariants and state equation in 15 ms returned []
Implicit Place search using SMT with State Equation took 136 ms to find 0 implicit places.
[2021-05-16 08:10:31] [INFO ] Redundant transitions in 0 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:31] [INFO ] Dead Transitions using invariants and state equation in 11 ms returned []
Finished structural reductions, in 1 iterations. Remains : 7/9 places, 7/8 transitions.
Stuttering acceptance computed with spot in 36 ms :[true, (NOT p0)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-12 automaton TGBA [mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=(NOT p0), acceptance={} source=1 dest: 0}, { cond=p0, acceptance={} source=1 dest: 1}]], initial=1, aps=[p0:(GT s5 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null][true, true]]
Entered a terminal (fully accepting) state of product in 22924 steps with 0 reset in 28 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-12 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-12 finished in 230 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !(X(F(p0)))], workingDir=/home/mcc/execution]
Support contains 1 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 8
Applied a total of 1 rules in 0 ms. Remains 8 /9 variables (removed 1) and now considering 8/8 (removed 0) transitions.
// Phase 1: matrix 8 rows 8 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:31] [INFO ] Implicit Places using invariants in 11 ms returned []
// Phase 1: matrix 8 rows 8 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 1 ms
[2021-05-16 08:10:31] [INFO ] Implicit Places using invariants and state equation in 14 ms returned []
Implicit Place search using SMT with State Equation took 28 ms to find 0 implicit places.
// Phase 1: matrix 8 rows 8 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:31] [INFO ] Dead Transitions using invariants and state equation in 10 ms returned []
Finished structural reductions, in 1 iterations. Remains : 8/9 places, 8/8 transitions.
Stuttering acceptance computed with spot in 44 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-14 automaton TGBA [mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(LEQ 1 s2)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, very-weak, weak, inherently-weak], stateDesc=[null, null][false, false]]
Product exploration explored 100000 steps with 4866 reset in 79 ms.
Stack based approach found an accepted trace after 3 steps with 0 reset with depth 4 and stack size 4 in 1 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-14 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-14 finished in 170 ms.
Running Spot : CommandLine [args=[/home/mcc/BenchKit/bin//..//ltl2tgba, --hoaf=tv, -f, !((X(X(X((p0 U p1))))||G(p2)))], workingDir=/home/mcc/execution]
Support contains 4 out of 9 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 9/9 places, 8/8 transitions.
Ensure Unique test removed 1 places
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 8 transition count 8
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 2 place count 7 transition count 7
Iterating global reduction 1 with 1 rules applied. Total rules applied 3 place count 7 transition count 7
Applied a total of 3 rules in 0 ms. Remains 7 /9 variables (removed 2) and now considering 7/8 (removed 1) transitions.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:31] [INFO ] Implicit Places using invariants in 11 ms returned []
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:31] [INFO ] Implicit Places using invariants and state equation in 10 ms returned []
Implicit Place search using SMT with State Equation took 22 ms to find 0 implicit places.
// Phase 1: matrix 7 rows 7 cols
[2021-05-16 08:10:31] [INFO ] Computed 3 place invariants in 0 ms
[2021-05-16 08:10:31] [INFO ] Dead Transitions using invariants and state equation in 9 ms returned []
Finished structural reductions, in 1 iterations. Remains : 7/9 places, 7/8 transitions.
Stuttering acceptance computed with spot in 214 ms :[(NOT p1), (AND (NOT p1) (NOT p2)), (AND (NOT p1) (NOT p2)), (NOT p1), (AND (NOT p1) (NOT p2)), true, (NOT p1), (AND (NOT p1) (NOT p2)), (NOT p2)]
Running random walk in product with property : SmallOperatingSystem-PT-MT1024DC0256-15 automaton TGBA [mat=[[{ cond=(AND (NOT p1) p0), acceptance={0} source=0 dest: 0}, { cond=(AND (NOT p1) (NOT p0)), acceptance={0} source=0 dest: 5}], [{ cond=(NOT p2), acceptance={} source=1 dest: 0}, { cond=p2, acceptance={} source=1 dest: 2}], [{ cond=(AND (NOT p2) (NOT p1) p0), acceptance={} source=2 dest: 0}, { cond=(AND p2 (NOT p1) p0), acceptance={} source=2 dest: 2}, { cond=(AND (NOT p2) (NOT p1) (NOT p0)), acceptance={} source=2 dest: 5}, { cond=(AND p2 (NOT p1) (NOT p0)), acceptance={} source=2 dest: 8}], [{ cond=true, acceptance={} source=3 dest: 0}], [{ cond=p2, acceptance={} source=4 dest: 1}, { cond=(NOT p2), acceptance={} source=4 dest: 3}], [{ cond=true, acceptance={0} source=5 dest: 5}], [{ cond=true, acceptance={} source=6 dest: 3}], [{ cond=p2, acceptance={} source=7 dest: 4}, { cond=(NOT p2), acceptance={} source=7 dest: 6}], [{ cond=(NOT p2), acceptance={} source=8 dest: 5}, { cond=p2, acceptance={} source=8 dest: 8}]], initial=7, aps=[p1:(LEQ s0 s4), p0:(LEQ 3 s3), p2:(GT s4 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null, null, null, null, null][false, false, false, false, false, false, false, false, false]]
Entered a terminal (fully accepting) state of product in 3 steps with 0 reset in 0 ms.
FORMULA SmallOperatingSystem-PT-MT1024DC0256-15 FALSE TECHNIQUES STUTTER_TEST
Treatment of property SmallOperatingSystem-PT-MT1024DC0256-15 finished in 257 ms.
All properties solved without resorting to model-checking.

BK_STOP 1621152632472

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ LTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution LTLCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination LTLCardinality -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="SmallOperatingSystem-PT-MT1024DC0256"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="itstools"
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 itstools"
echo " Input is SmallOperatingSystem-PT-MT1024DC0256, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r254-tall-162106745500092"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/SmallOperatingSystem-PT-MT1024DC0256.tgz
mv SmallOperatingSystem-PT-MT1024DC0256 execution
cd execution
if [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "UpperBounds" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] || [ "LTLCardinality" = "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 [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '' LTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLCardinality"
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 ;