About the Execution of ITS-LoLa for Sudoku-COL-AN10
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 15743.840 | 3600000.00 | 12984.00 | 133.70 | FTFTTFFFFFTTTFTT | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fko/mcc2020-input.r228-oct2-159033547300226.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fko/mcc2020-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
.................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itslola
Input is Sudoku-COL-AN10, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r228-oct2-159033547300226
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 176K
-rw-r--r-- 1 mcc users 3.4K May 14 04:00 CTLCardinality.txt
-rw-r--r-- 1 mcc users 19K May 14 04:00 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K May 13 21:36 CTLFireability.txt
-rw-r--r-- 1 mcc users 15K May 13 21:36 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.4K May 14 10:06 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 14 10:06 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K May 14 10:06 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K May 14 10:06 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 May 12 20:42 NewModel
-rw-r--r-- 1 mcc users 3.8K May 13 15:07 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 20K May 13 15:06 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.5K May 13 10:28 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 14K May 13 10:28 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 13 16:53 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K May 13 16:53 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 12 20:42 equiv_pt
-rw-r--r-- 1 mcc users 5 May 12 20:42 instance
-rw-r--r-- 1 mcc users 5 May 12 20:42 iscolored
-rw-r--r-- 1 mcc users 6.5K May 12 20:42 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 Sudoku-COL-AN10-00
FORMULA_NAME Sudoku-COL-AN10-01
FORMULA_NAME Sudoku-COL-AN10-02
FORMULA_NAME Sudoku-COL-AN10-03
FORMULA_NAME Sudoku-COL-AN10-04
FORMULA_NAME Sudoku-COL-AN10-05
FORMULA_NAME Sudoku-COL-AN10-06
FORMULA_NAME Sudoku-COL-AN10-07
FORMULA_NAME Sudoku-COL-AN10-08
FORMULA_NAME Sudoku-COL-AN10-09
FORMULA_NAME Sudoku-COL-AN10-10
FORMULA_NAME Sudoku-COL-AN10-11
FORMULA_NAME Sudoku-COL-AN10-12
FORMULA_NAME Sudoku-COL-AN10-13
FORMULA_NAME Sudoku-COL-AN10-14
FORMULA_NAME Sudoku-COL-AN10-15
=== Now, execution of the tool begins
BK_START 1591292549404
bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
[2020-06-04 17:42:32] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -timeout, 3600, -rebuildPNML]
[2020-06-04 17:42:32] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-06-04 17:42:32] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[2020-06-04 17:42:32] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 551 ms
[2020-06-04 17:42:32] [INFO ] sort/places :
N2->Rows,Cells,Columns,
N3->Board,
[2020-06-04 17:42:32] [WARNING] Unknown color function,Tuple skipping symmetry detection on parameters for transition select
[2020-06-04 17:42:32] [WARNING] Unknown color function,Tuple skipping symmetry detection on parameters for transition select
[2020-06-04 17:42:32] [WARNING] Unknown color function,Tuple skipping symmetry detection on parameters for transition select
[2020-06-04 17:42:32] [INFO ] Imported 4 HL places and 1 HL transitions for a total of 972 PT places and 729.0 transition bindings in 13 ms.
[2020-06-04 17:42:32] [INFO ] Computed order based on color domains.
[2020-06-04 17:42:32] [INFO ] Unfolded HLPN to a Petri net with 972 places and 729 transitions in 33 ms.
[2020-06-04 17:42:32] [INFO ] Unfolded HLPN properties in 5 ms.
Deduced a syphon composed of 968 places in 1 ms
Reduce places removed 968 places and 728 transitions.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 353 ms.
Working with output stream class java.io.PrintStream
Finished random walk after 2 steps, including 1 resets, run visited all 10 properties in 1 ms. (steps per millisecond=2 )
[2020-06-04 17:42:33] [INFO ] Initial state reduction rules for CTL removed 5 formulas.
[2020-06-04 17:42:33] [INFO ] Flatten gal took : 28 ms
FORMULA Sudoku-COL-AN10-14 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Sudoku-COL-AN10-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Sudoku-COL-AN10-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Sudoku-COL-AN10-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Sudoku-COL-AN10-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2020-06-04 17:42:33] [INFO ] Applying decomposition
[2020-06-04 17:42:33] [INFO ] Flatten gal took : 1 ms
[2020-06-04 17:42:33] [INFO ] Decomposing Gal with order
[2020-06-04 17:42:33] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-06-04 17:42:33] [INFO ] Flatten gal took : 42 ms
[2020-06-04 17:42:33] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 0 ms.
[2020-06-04 17:42:33] [INFO ] Export to MCC properties in file /home/mcc/execution/LTLFireability.sr.xml took 2 ms.
[2020-06-04 17:42:33] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml took 0 ms.
info: Time: 3600 - MCC
vrfy: Checking LTLFireability @ Sudoku-COL-AN10 @ 3570 seconds
FORMULA Sudoku-COL-AN10-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-07 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-10 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-13 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-15 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-08 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-06 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-03 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-01 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA Sudoku-COL-AN10-09 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
vrfy: finished
info: timeLeft: 3567
rslt: Output for LTLFireability @ Sudoku-COL-AN10
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"runtime": 3.000000,
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},
"files":
{
"formula": "LTLFireability.xml",
"net": "model.pnml"
},
"formula":
{
"skeleton": "X(F((X(G((G(**) OR (** U **)))) OR *))) : (G(**) OR (F(**) AND ((* R *) OR F(*)))) : G((F((G(*) OR (** OR (** OR **)))) AND F(**))) : ((* R *) OR F((G(*) OR (* AND *)))) : (F(*) AND G(**)) : X(F((G(*) AND (F(*) AND (** AND (** AND **)))))) : G((G(F((F((G(**) OR **)) OR **))) OR **)) : (G(F((G(*) AND **))) AND F(G(**))) : (X(G(*)) OR (G(*) AND (X(G(*)) OR F(*)))) : X(F(**)) : G(F((X((G(*) R F(*))) OR (* OR (* OR *)))))"
},
"net":
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lola: LoLA will run for 3570 seconds at most (--timelimit)
lola: NET
lola: input: PNML file (--pnml)
lola: reading net from model.pnml
lola: reading pnml
lola: PNML file contains place/transition net
lola: finished parsing
lola: closed net file model.pnml
lola: 5/268435456 symbol table entries, 0 collisions
lola: preprocessing...
lola: Size of bit vector: 128
lola: finding significant places
lola: 4 places, 1 transitions, 1 significant places
lola: compute conflict clusters
lola: computed conflict clusters
lola: Computing conflicting sets
lola: Computing back conflicting sets
lola: TASK
lola: Reading formula in XML format (--xmlformula)
lola: reading pnml
lola: reading formula from LTLFireability.xml
lola: NOT(G (X ((F (NOT(X ((G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR (((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U ((1 <= p0) AND (1 <= p2) AND (1 <= p3))))))) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))))) : (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR (F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) AND (NOT((((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) OR NOT(G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))))) : (G (F ((((NOT(F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) OR (p0 <= 0)) OR (p2 <= 0)) OR (p3 <= 0)))) AND G (F ((((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U X (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))))) : (NOT((((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) OR NOT(G ((((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))) : (NOT(G (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) AND G (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) : X (F (((((NOT(F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) AND NOT(G ((((1 <= p0) AND (1 <= p2) AND (1 <= p3)) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))) AND (1 <= p0)) AND (1 <= p2)) AND (1 <= p3)))) : G ((G (F (((G (F (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) OR F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) : (F (X (G (F ((NOT(F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))))) AND F (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) : (NOT(X (F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) OR (NOT(F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) AND (NOT(X (F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) OR NOT(G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))))) : F (X (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) : G (X (G (NOT(G ((((X ((F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) U G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) AND (1 <= p0)) AND (1 <= p2)) AND (1 <= p3)))))))
lola: rewrite Frontend/Parser/formula_rewrite.k:335
lola: rewrite Frontend/Parser/formula_rewrite.k:318
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:338
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:356
lola: rewrite Frontend/Parser/formula_rewrite.k:353
lola: rewrite Frontend/Parser/formula_rewrite.k:335
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:315
lola: rewrite Frontend/Parser/formula_rewrite.k:335
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:315
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:300
lola: rewrite Frontend/Parser/formula_rewrite.k:341
lola: rewrite Frontend/Parser/formula_rewrite.k:300
lola: rewrite Frontend/Parser/formula_rewrite.k:300
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:338
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:254
lola: rewrite Frontend/Parser/formula_rewrite.k:254
lola: rewrite Frontend/Parser/formula_rewrite.k:254
lola: rewrite Frontend/Parser/formula_rewrite.k:434
lola: rewrite Frontend/Parser/formula_rewrite.k:356
lola: rewrite Frontend/Parser/formula_rewrite.k:353
lola: rewrite Frontend/Parser/formula_rewrite.k:377
lola: rewrite Frontend/Parser/formula_rewrite.k:522
lola: rewrite Frontend/Parser/formula_rewrite.k:338
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:437
lola: rewrite Frontend/Parser/formula_rewrite.k:522
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:315
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:318
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:374
lola: rewrite Frontend/Parser/formula_rewrite.k:519
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:377
lola: rewrite Frontend/Parser/formula_rewrite.k:371
lola: rewrite Frontend/Parser/formula_rewrite.k:335
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:335
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:356
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:251
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:315
lola: rewrite Frontend/Parser/formula_rewrite.k:335
lola: rewrite Frontend/Parser/formula_rewrite.k:338
lola: rewrite Frontend/Parser/formula_rewrite.k:332
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:329
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:315
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:315
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:297
lola: rewrite Frontend/Parser/formula_rewrite.k:377
lola: rewrite Frontend/Parser/formula_rewrite.k:350
lola: computing a collection of formulas
lola: RUNNING
lola: subprocess 0 will run for 324 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: X (F ((X (G ((G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR (((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: X (F ((X (G ((G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR (((1 <= p0) AND (1 <= p2) AND (1 <= p3)) U ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))
lola: processed formula length: 193
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 10 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: Formula contains X operator; stubborn sets not applicable
lola: Formula contains X operator; stubborn sets not applicable
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 4 markings, 4 edges
lola: ========================================
lola: subprocess 1 will run for 356 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: X (F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) AND (F ((((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))) AND ((1 <= p0) AND ((1 <= p2) AND (1 <= p3)))))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: X (F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) AND (F ((((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))) AND ((1 <= p0) AND ((1 <= p2) AND (1 <= p3)))))))
lola: processed formula length: 195
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 5 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: Formula contains X operator; stubborn sets not applicable
lola: Formula contains X operator; stubborn sets not applicable
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 3 markings, 4 edges
lola: ========================================
lola: subprocess 2 will run for 396 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (X (G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))) OR (G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) AND (X (G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))) OR F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 2 will run for 396 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))
lola: ========================================
lola: SUBTASK
lola: checking eventual occurrence
lola: rewrite Frontend/Parser/formula_rewrite.k:750
lola: rewrite Frontend/Parser/formula_rewrite.k:788
lola: processed formula: ((1 <= p0) AND (1 <= p2) AND (1 <= p3))
lola: processed formula length: 39
lola: 97 rewrites
lola: closed formula file LTLFireability.xml
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: SEARCH (state space / EG)
lola: state space: using search routine for EG formula (--search=depth)
lola: state space: using EG preserving stubborn set method (--stubborn=tarjan)
lola: RUNNING
lola: SUBRESULT
lola: result: yes
lola: produced by: state space / EG
lola: The predicate eventually occurs.
lola: 1 markings, 0 edges
lola: ========================================
lola: subprocess 3 will run for 445 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))
lola: processed formula length: 43
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 2 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 2 markings, 2 edges
lola: ========================================
lola: subprocess 4 will run for 509 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: X (G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: X (G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))
lola: processed formula length: 47
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 3 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: Formula contains X operator; stubborn sets not applicable
lola: Formula contains X operator; stubborn sets not applicable
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: yes
lola: produced by: LTL model checker
lola: The net satisfies the given formula (language of the product automaton is empty).
lola: 2 markings, 2 edges
lola: ========================================
lola: SUBRESULT
lola: result: yes
lola: The Boolean predicate is true.
lola: ========================================
lola: subprocess 3 will run for 445 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: X (F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: X (F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: processed formula length: 47
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 2 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: Formula contains X operator; stubborn sets not applicable
lola: Formula contains X operator; stubborn sets not applicable
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 2 markings, 2 edges
lola: ========================================
lola: subprocess 4 will run for 509 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: G (F ((X ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) R F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))) OR ((p0 <= 0) OR ((p2 <= 0) OR (p3 <= 0))))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: G (F ((X ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) R F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))) OR ((p0 <= 0) OR ((p2 <= 0) OR (p3 <= 0))))))
lola: processed formula length: 148
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 8 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: Formula contains X operator; stubborn sets not applicable
lola: Formula contains X operator; stubborn sets not applicable
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: yes
lola: produced by: LTL model checker
lola: The net satisfies the given formula (language of the product automaton is empty).
lola: 3 markings, 3 edges
lola: ========================================
lola: subprocess 5 will run for 594 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: G ((G (F ((F ((G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: G ((G (F ((F ((G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3)))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3))))) OR ((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: processed formula length: 194
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 6 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 3 markings, 3 edges
lola: ========================================
lola: subprocess 6 will run for 713 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: G ((F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR ((p0 <= 0) OR ((p2 <= 0) OR (p3 <= 0))))) AND F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: G ((F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR ((p0 <= 0) OR ((p2 <= 0) OR (p3 <= 0))))) AND F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))
lola: processed formula length: 146
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 5 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 4 markings, 4 edges
lola: ========================================
lola: subprocess 7 will run for 891 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) AND G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 7 will run for 891 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: G (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: G (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))
lola: processed formula length: 43
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 2 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 3 markings, 3 edges
lola: ========================================
lola: SUBRESULT
lola: result: no
lola: The Boolean predicate is false.
lola: ========================================
lola: subprocess 8 will run for 1189 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: ((((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) R ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 8 will run for 1189 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) R ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) R ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))
lola: processed formula length: 83
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 2 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 2 markings, 2 edges
lola: ========================================
lola: subprocess 9 will run for 1783 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))))
lola: processed formula length: 138
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 2 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: yes
lola: produced by: LTL model checker
lola: The net satisfies the given formula (language of the product automaton is empty).
lola: 3 markings, 2 edges
lola: ========================================
lola: SUBRESULT
lola: result: yes
lola: The Boolean predicate is true.
lola: ========================================
lola: subprocess 9 will run for 1783 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) OR (F (((1 <= p0) AND (1 <= p2) AND (1 <= p3))) AND ((((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)) R ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) OR F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 9 will run for 1783 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: F (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0)))
lola: ========================================
lola: SUBTASK
lola: checking eventual occurrence
lola: rewrite Frontend/Parser/formula_rewrite.k:750
lola: rewrite Frontend/Parser/formula_rewrite.k:788
lola: processed formula: ((1 <= p0) AND (1 <= p2) AND (1 <= p3))
lola: processed formula length: 39
lola: 97 rewrites
lola: closed formula file LTLFireability.xml
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: SEARCH (state space / EG)
lola: state space: using search routine for EG formula (--search=depth)
lola: state space: using EG preserving stubborn set method (--stubborn=tarjan)
lola: RUNNING
lola: SUBRESULT
lola: result: yes
lola: produced by: state space / EG
lola: The predicate eventually occurs.
lola: 1 markings, 0 edges
lola: ========================================
lola: subprocess 10 will run for 3567 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: F (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))
lola: ========================================
lola: SUBTASK
lola: checking eventual occurrence
lola: rewrite Frontend/Parser/formula_rewrite.k:750
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: processed formula: ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))
lola: processed formula length: 39
lola: 97 rewrites
lola: closed formula file LTLFireability.xml
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: SEARCH (state space / EG)
lola: state space: using search routine for EG formula (--search=depth)
lola: state space: using EG preserving stubborn set method (--stubborn=tarjan)
lola: RUNNING
lola: SUBRESULT
lola: result: yes
lola: produced by: state space / EG
lola: The predicate eventually occurs.
lola: 1 markings, 0 edges
lola: ========================================
lola: SUBRESULT
lola: result: yes
lola: The Boolean predicate is true.
lola: ========================================
lola: subprocess 10 will run for 3567 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (G (F ((G (((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))) AND ((p0 <= 0) OR (p2 <= 0) OR (p3 <= 0))))) AND F (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3)))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: subprocess 10 will run for 3567 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: F (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: ========================================
lola: SUBTASK
lola: checking stabilization
lola: stabilization not yet implemented, converting to LTL...
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: F (G (((1 <= p0) AND (1 <= p2) AND (1 <= p3))))
lola: processed formula length: 47
lola: 95 rewrites
lola: closed formula file LTLFireability.xml
lola: the resulting Büchi automaton has 2 states
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: using ltl preserving stubborn set method with deletion algorithm (--stubborn=deletion)
lola: using ltl preserving stubborn set method with insertion algorithm(--stubborn=tarjan)
lola: SEARCH
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 3 markings, 4 edges
lola: ========================================
lola: SUBRESULT
lola: result: no
lola: The Boolean predicate is false.
lola: ========================================
lola: RESULT
lola:
SUMMARY: no yes no yes no no no no yes no yes
lola:
preliminary result: no yes no yes no no no no yes no yes
lola: memory consumption: 36912 KB
lola: time consumption: 3 seconds
lola: print data as JSON (--json)
lola: writing JSON to LTLFireability.json
lola: closed JSON file LTLFireability.json
rslt: finished
--------------------
content from stderr:
Sequence of Actions to be Executed by the VM
This is useful if one wants to reexecute the tool in the VM from the submitted image disk.
set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="Sudoku-COL-AN10"
export BK_EXAMINATION="LTLFireability"
export BK_TOOL="itslola"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
# 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 itslola"
echo " Input is Sudoku-COL-AN10, examination is LTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r228-oct2-159033547300226"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/Sudoku-COL-AN10.tgz
mv Sudoku-COL-AN10 execution
cd execution
if [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "UpperBounds" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] || [ "LTLFireability" = "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 [ "LTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLFireability" != "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 "LTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLFireability.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 '
echo "FORMULA_NAME $x"
done
elif [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLFireability"
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 ;