fond
Model Checking Contest 2019
9th edition, Prague, Czech Republic, April 7, 2019 (TOOLympics)
Execution of r148-ebro-155286403900240
Last Updated
Apr 15, 2019

About the Execution of LoLA for RobotManipulation-PT-02000

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15918.920 3570293.00 993283.00 4680.50 FFFFTF?TF??FTTFF normal

Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2019-input.r148-ebro-155286403900240.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2019-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.....................
=====================================================================
Generated by BenchKit 2-3954
Executing tool lola
Input is RobotManipulation-PT-02000, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r148-ebro-155286403900240
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 176K
-rw-r--r-- 1 mcc users 3.8K Feb 12 14:35 CTLCardinality.txt
-rw-r--r-- 1 mcc users 21K Feb 12 14:35 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.8K Feb 8 16:31 CTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 8 16:31 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 10 17:31 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.2K Mar 10 17:31 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 113 Feb 24 15:05 GlobalProperties.txt
-rw-r--r-- 1 mcc users 351 Feb 24 15:05 GlobalProperties.xml
-rw-r--r-- 1 mcc users 2.6K Feb 5 01:16 LTLCardinality.txt
-rw-r--r-- 1 mcc users 12K Feb 5 01:16 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K Feb 4 22:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 8.2K Feb 4 22:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.5K Feb 4 16:41 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 16K Feb 4 16:41 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.2K Feb 1 13:04 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 1 13:04 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Feb 4 22:30 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 4 22:30 UpperBounds.xml

-rw-r--r-- 1 mcc users 6 Jan 29 09:35 equiv_col
-rw-r--r-- 1 mcc users 6 Jan 29 09:35 instance
-rw-r--r-- 1 mcc users 6 Jan 29 09:35 iscolored
-rw-r--r-- 1 mcc users 6.4K Mar 10 17:31 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 RobotManipulation-PT-02000-LTLCardinality-00
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-01
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-02
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-03
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-04
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-05
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-06
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-07
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-08
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-09
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-10
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-11
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-12
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-13
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-14
FORMULA_NAME RobotManipulation-PT-02000-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1552995372966

info: Time: 3600 - MCC
vrfy: Checking LTLCardinality @ RobotManipulation-PT-02000 @ 3570 seconds

FORMULA RobotManipulation-PT-02000-LTLCardinality-03 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-08 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-12 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-14 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-15 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-07 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-04 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-13 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-01 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-11 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA RobotManipulation-PT-02000-LTLCardinality-05 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
vrfy: finished
info: timeLeft: -1
rslt: Output for LTLCardinality @ RobotManipulation-PT-02000

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"transition_references": 0,
"unfir": 0,
"visible_places": 2,
"visible_transitions": 0
},
"processed": "A (G (F ((r_active <= moved))))",
"processed_size": 31,
"rewrites": 14
},
"result":
{
"edges": 20002,
"markings": 20002,
"produced_by": "LTL model checker",
"value": false
},
"task":
{
"buchi":
{
"states": 2
},
"compoundnumber": 12,
"search":
{
"store":
{
"encoder": "simple compression",
"type": "prefix"
},
"stubborn":
{
"type": "ltl preserving/insertion"
},
"type": "product automaton/dfs"
},
"type": "LTL",
"workflow": "product automaton"
}
},

{
"call":
{
"dynamic_timelimit": true,
"localtimelimit": 1462
},
"exit":
{
"localtimelimitreached": false
},
"formula":
{
"count":
{
"A": 1,
"E": 0,
"F": 2,
"G": 1,
"U": 0,
"X": 0,
"aconj": 0,
"adisj": 0,
"aneg": 0,
"comp": 3,
"cont": 0,
"dl": 0,
"fir": 0,
"nodl": 0,
"place_references": 5,
"taut": 0,
"tconj": 1,
"tdisj": 1,
"tneg": 0,
"transition_references": 0,
"unfir": 0,
"visible_places": 3,
"visible_transitions": 0
},
"processed": "A (F (G ((F ((p_i1 <= off)) AND ((3 <= p_rel) OR (p_i1 <= off))))))",
"processed_size": 67,
"rewrites": 14
},
"result":
{
"edges": 88089996,
"markings": 64067999,
"produced_by": "LTL model checker",
"value": false
},
"task":
{
"buchi":
{
"states": 3
},
"compoundnumber": 14,
"search":
{
"store":
{
"encoder": "simple compression",
"type": "prefix"
},
"stubborn":
{
"type": "ltl preserving/insertion"
},
"type": "product automaton/dfs"
},
"type": "LTL",
"workflow": "product automaton"
}
}
],
"exit":
{
"error": null,
"memory": 16904,
"runtime": 3570.000000,
"signal": null,
"timelimitreached": true
},
"files":
{
"formula": "LTLCardinality.xml",
"net": "model.pnml"
},
"formula":
{
"skeleton": "A(G(**)) : A(G(F(**))) : A(G(**)) : ** : A(F(**)) : A(F(G((F(**) AND (** OR **))))) : (A(F(G(**))) AND A(G((F(**) OR G(**))))) : A(F(**)) : A(X(X(X(G(**))))) : A(G(F(**))) : A(X((F(**) OR (G(**) AND F(**))))) : A(G(F(**))) : A(((** U **) U X(**))) : A(F(**)) : A((X(G(**)) U **)) : A(X(G(**)))"
},
"net":
{
"arcs": 34,
"conflict_clusters": 9,
"places": 15,
"places_significant": 9,
"singleton_clusters": 0,
"transitions": 11
},
"result":
{
"interim_value": "no no no no yes no unknown yes no unknown unknown no yes yes no no ",
"preliminary_value": "no no no no yes no unknown yes no unknown unknown no yes yes no no "
},
"task":
{
"type": "compound"
}
}
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: 26/268435456 symbol table entries, 0 collisions
lola: preprocessing...
lola: Size of bit vector: 480
lola: finding significant places
lola: 15 places, 11 transitions, 9 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 LTLCardinality.xml
lola: A (G ((2 <= moved))) : A (G (F ((r_moving <= p_i2)))) : A (G ((2 <= r_stopped))) : A ((2 <= initialized)) : A (F ((off <= p_i2))) : A (F (G (((3 <= p_rel) U (p_i1 <= off))))) : A (G ((F ((3 <= access)) U G ((r_active <= p_i1))))) : A (F ((1 <= initialize))) : A (X (X (X (G ((r_moving <= initialize)))))) : A (((move <= initialized) U G (F ((p_i2 <= access))))) : A ((X (G ((p_sc <= initialize))) U F (X ((initialize <= p_rdy))))) : A (G (F (((p_m <= off) U (r_active <= moved))))) : A ((((2 <= p_i1) U (1 <= off)) U X ((p_m <= p_rdy)))) : A (F ((initialize <= p_rdy))) : A ((G (X ((r_active <= p_m))) U (2 <= moved))) : A (G (X ((3 <= off))))
lola: rewrite Frontend/Parser/formula_rewrite.k:151
lola: rewrite Frontend/Parser/formula_rewrite.k:437
lola: rewrite Frontend/Parser/formula_rewrite.k:522
lola: rewrite Frontend/Parser/formula_rewrite.k:437
lola: rewrite Frontend/Parser/formula_rewrite.k:374
lola: rewrite Frontend/Parser/formula_rewrite.k:536
lola: rewrite Frontend/Parser/formula_rewrite.k:425
lola: rewrite Frontend/Parser/formula_rewrite.k:356
lola: rewrite Frontend/Parser/formula_rewrite.k:410
lola: rewrite Frontend/Parser/formula_rewrite.k:431
lola: rewrite Frontend/Parser/formula_rewrite.k:347
lola: rewrite Frontend/Parser/formula_rewrite.k:434
lola: rewrite Frontend/Parser/formula_rewrite.k:353
lola: rewrite Frontend/Parser/formula_rewrite.k:353
lola: computing a collection of formulas
lola: RUNNING
lola: subprocess 0 will run for 222 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (2 <= initialized)
lola: ========================================
lola: SUBTASK
lola: checking initial satisfaction
lola: processed formula: (2 <= initialized)
lola: processed formula length: 18
lola: 14 rewrites
lola: closed formula file LTLCardinality.xml
lola: processed formula with 1 atomic propositions
lola: RUNNING
lola: SUBRESULT
lola: result: no
lola: produced by: preprocessing
lola: The net violates the given property already in its initial state.
lola: 0 markings, 0 edges
lola: ========================================
lola: subprocess 1 will run for 237 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (X (X (X (G ((r_moving <= initialize))))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (X (X (X (G ((r_moving <= initialize))))))
lola: processed formula length: 44
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: 24004 markings, 24004 edges
lola: ========================================
lola: subprocess 2 will run for 254 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (X ((F ((initialize <= p_rdy)) OR (G ((p_sc <= initialize)) AND F ((initialize <= p_rdy))))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (X ((F ((initialize <= p_rdy)) OR (G ((p_sc <= initialize)) AND F ((initialize <= p_rdy))))))
lola: processed formula length: 95
lola: 14 rewrites
lola: closed formula file LTLCardinality.xml
lola: the resulting Büchi automaton has 4 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: 1529391 markings, 3364034 edges, 305878 markings/sec, 0 secs
lola: 2890702 markings, 6394418 edges, 272262 markings/sec, 5 secs
lola: 4255301 markings, 9438187 edges, 272920 markings/sec, 10 secs
lola: 5628333 markings, 12507276 edges, 274606 markings/sec, 15 secs
lola: 6974480 markings, 15515964 edges, 269229 markings/sec, 20 secs
lola: 8313419 markings, 18503956 edges, 267788 markings/sec, 25 secs
lola: 9632066 markings, 21456707 edges, 263729 markings/sec, 30 secs
lola: 10948208 markings, 24388096 edges, 263228 markings/sec, 35 secs
lola: 12236866 markings, 27280770 edges, 257732 markings/sec, 40 secs
lola: 13517896 markings, 30150372 edges, 256206 markings/sec, 45 secs
lola: 14800899 markings, 33007814 edges, 256601 markings/sec, 50 secs
lola: 16063212 markings, 35841412 edges, 252463 markings/sec, 55 secs
lola: 17326833 markings, 38662385 edges, 252724 markings/sec, 60 secs
lola: 18579522 markings, 41465420 edges, 250538 markings/sec, 65 secs
lola: 19821250 markings, 44255728 edges, 248346 markings/sec, 70 secs
lola: 21067443 markings, 47034247 edges, 249239 markings/sec, 75 secs
lola: 22300063 markings, 49797095 edges, 246524 markings/sec, 80 secs
lola: 23531004 markings, 52551159 edges, 246188 markings/sec, 85 secs
lola: 24744478 markings, 55292972 edges, 242695 markings/sec, 90 secs
lola: 25974499 markings, 58024262 edges, 246004 markings/sec, 95 secs
lola: 27188030 markings, 60745389 edges, 242706 markings/sec, 100 secs
lola: 28396541 markings, 63454359 edges, 241702 markings/sec, 105 secs
lola: 29605010 markings, 66154270 edges, 241694 markings/sec, 110 secs
lola: 30795094 markings, 68834962 edges, 238017 markings/sec, 115 secs
lola: 31985530 markings, 71504639 edges, 238087 markings/sec, 120 secs
lola: 33173158 markings, 74162827 edges, 237526 markings/sec, 125 secs
lola: 34362671 markings, 76816440 edges, 237903 markings/sec, 130 secs
lola: 35530833 markings, 79446652 edges, 233632 markings/sec, 135 secs
lola: 36698330 markings, 82069037 edges, 233499 markings/sec, 140 secs
lola: 37865903 markings, 84685401 edges, 233515 markings/sec, 145 secs
lola: 39033570 markings, 87295721 edges, 233533 markings/sec, 150 secs
lola: 40202046 markings, 89901709 edges, 233695 markings/sec, 155 secs
lola: 41346899 markings, 92479325 edges, 228971 markings/sec, 160 secs
lola: 42489557 markings, 95053676 edges, 228532 markings/sec, 165 secs
lola: 43656864 markings, 97638941 edges, 233461 markings/sec, 170 secs
lola: 44778505 markings, 100189261 edges, 224328 markings/sec, 175 secs
lola: 45936701 markings, 102756431 edges, 231639 markings/sec, 180 secs
lola: 47068659 markings, 105307567 edges, 226392 markings/sec, 185 secs
lola: 48194115 markings, 107849457 edges, 225091 markings/sec, 190 secs
lola: 49338448 markings, 110392054 edges, 228867 markings/sec, 195 secs
lola: 50480902 markings, 112935072 edges, 228491 markings/sec, 200 secs
lola: 51604213 markings, 115464198 edges, 224662 markings/sec, 205 secs
lola: 52725618 markings, 117984606 edges, 224281 markings/sec, 210 secs
lola: 53811445 markings, 120412091 edges, 217165 markings/sec, 215 secs
lola: 54896025 markings, 122832440 edges, 216916 markings/sec, 220 secs
lola: 55969886 markings, 125257512 edges, 214772 markings/sec, 225 secs
lola: 57048885 markings, 127696026 edges, 215800 markings/sec, 230 secs
lola: 58132828 markings, 130129100 edges, 216789 markings/sec, 235 secs
lola: 59235049 markings, 132578866 edges, 220444 markings/sec, 240 secs
lola: 60320630 markings, 135006729 edges, 217116 markings/sec, 245 secs
lola: local time limit reached - aborting
lola:
preliminary result: unknown unknown unknown no unknown unknown unknown unknown no unknown unknown unknown unknown unknown unknown unknown
lola: memory consumption: 8264812 KB
lola: time consumption: 260 seconds
lola: print data as JSON (--json)
lola: writing JSON to LTLCardinality.json
lola: closed JSON file LTLCardinality.json
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 3 will run for 254 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A ((((2 <= p_i1) U (1 <= off)) U X ((p_m <= p_rdy))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A ((((2 <= p_i1) U (1 <= off)) U X ((p_m <= p_rdy))))
lola: processed formula length: 53
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: 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, 2 edges
lola: ========================================
lola: subprocess 4 will run for 275 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A ((X (G ((r_active <= p_m))) U (2 <= moved)))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A ((X (G ((r_active <= p_m))) U (2 <= moved)))
lola: processed formula length: 46
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 24004 markings, 24004 edges
lola: ========================================
lola: subprocess 5 will run for 300 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (X (G ((3 <= off))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (X (G ((3 <= off))))
lola: processed formula length: 22
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: no
lola: produced by: LTL model checker
lola: The net does not satisfy the given formula (language of the product automaton is nonempty).
lola: 24004 markings, 24004 edges
lola: ========================================
lola: subprocess 6 will run for 330 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (G ((2 <= moved)))
lola: ========================================
lola: SUBTASK
lola: checking invariance
lola: Planning: workflow for reachability check: stateequation||search (--findpath=off)
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: processed formula: A (G ((2 <= moved)))
lola: processed formula length: 20
lola: 16 rewrites
lola: closed formula file LTLCardinality.xml
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: SEARCH (state space)
lola: state space: using reachability graph (--search=depth)
lola: state space: using reachability preserving stubborn set method with insertion algorithm (--stubborn=tarjan)
lola: built state equation task
lola: RUNNING
lola: state equation task get result started, id 0
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: state equation task get result rewrite finished id 0
lola: state equation task get result unparse finished++ id 0
lola: formula 0: (moved <= 1)
lola: state equation task get result unparse finished id 0
lola: state equation: Generated DNF with 1 literals and 1 conjunctive subformulas
lola: SUBRESULT
lola: result: no
lola: produced by: state space
lola: The predicate is not invariant.
lola: 0 markings, 0 edges
lola: ========================================
lola: subprocess 7 will run for 367 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (G ((2 <= r_stopped)))
lola: ========================================
lola: SUBTASK
lola: checking invariance
lola: Planning: workflow for reachability check: stateequation||search (--findpath=off)
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: processed formula: A (G ((2 <= r_stopped)))
lola: processed formula length: 24
lola: 16 rewrites
lola: closed formula file LTLCardinality.xml
lola: STORE
lola: using a simple compression encoder (--encoder=simplecompressed)
lola: using a prefix tree store (--store=prefix)
lola: SEARCH (state space)
lola: state space: using reachability graph (--search=depth)
lola: state space: using reachability preserving stubborn set method with insertion algorithm (--stubborn=tarjan)
lola: built state equation task
lola: RUNNING
lola: state equation task get result started, id 0
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: state equation task get result rewrite finished id 0
lola: state equation task get result unparse finished++ id 0
lola: formula 0: (r_stopped <= 1)
lola: state equation task get result unparse finished id 0
lola: state equation: Generated DNF with 1 literals and 1 conjunctive subformulas
lola: state equation: write sara problem file to LTLCardinality-7-0.sara
lola: state equation: calling and running sara
lola: SUBRESULT
lola: result: no
lola: produced by: state space
lola: The predicate is not invariant.
lola: 7999 markings, 7998 edges
lola: ========================================
lola: subprocess 8 will run for 413 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (F ((1 <= initialize)))
lola: ========================================
lola: SUBTASK
lola: checking eventual occurrence
lola: rewrite Frontend/Parser/formula_rewrite.k:749
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: processed formula: (initialize <= 0)
lola: processed formula length: 17
lola: 16 rewrites
lola: closed formula file LTLCardinality.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 9 will run for 472 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (F ((off <= p_i2)))
lola: ========================================
lola: SUBTASK
lola: checking eventual occurrence
lola: rewrite Frontend/Parser/formula_rewrite.k:749
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: processed formula: (p_i2 + 1 <= off)
lola: processed formula length: 17
lola: 16 rewrites
lola: closed formula file LTLCardinality.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 551 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (F ((initialize <= p_rdy)))
lola: ========================================
lola: SUBTASK
lola: checking eventual occurrence
lola: rewrite Frontend/Parser/formula_rewrite.k:749
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: processed formula: (p_rdy + 1 <= initialize)
lola: processed formula length: 25
lola: 16 rewrites
lola: closed formula file LTLCardinality.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 11 will run for 661 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (G (F ((r_moving <= p_i2))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (G (F ((r_moving <= p_i2))))
lola: processed formula length: 30
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: 32011 markings, 40013 edges
lola: ========================================
lola: subprocess 12 will run for 827 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (G (F ((r_active <= moved))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (G (F ((r_active <= moved))))
lola: processed formula length: 31
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: 20002 markings, 20002 edges
lola: ========================================
lola: subprocess 13 will run for 1103 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (G (F ((p_i2 <= access))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (G (F ((p_i2 <= access))))
lola: processed formula length: 28
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: 1664218 markings, 3028909 edges, 332844 markings/sec, 0 secs
lola: 3226801 markings, 5893978 edges, 312517 markings/sec, 5 secs
lola: 4758055 markings, 8700996 edges, 306251 markings/sec, 10 secs
lola: 6269254 markings, 11471794 edges, 302240 markings/sec, 15 secs
lola: 7764033 markings, 14212871 edges, 298956 markings/sec, 20 secs
lola: 9252459 markings, 16941589 edges, 297685 markings/sec, 25 secs
lola: 10733450 markings, 19656709 edges, 296198 markings/sec, 30 secs
lola: 12206064 markings, 22356908 edges, 294523 markings/sec, 35 secs
lola: 13671189 markings, 25043173 edges, 293025 markings/sec, 40 secs
lola: 15133092 markings, 27723683 edges, 292381 markings/sec, 45 secs
lola: 16596001 markings, 30405590 edges, 292582 markings/sec, 50 secs
lola: 18057580 markings, 33085278 edges, 292316 markings/sec, 55 secs
lola: 19520944 markings, 35768261 edges, 292673 markings/sec, 60 secs
lola: 20983958 markings, 38450607 edges, 292603 markings/sec, 65 secs
lola: 22450010 markings, 41138902 edges, 293210 markings/sec, 70 secs
lola: 23923313 markings, 43840012 edges, 294661 markings/sec, 75 secs
lola: 25403977 markings, 46554834 edges, 296133 markings/sec, 80 secs
lola: 26890806 markings, 49280841 edges, 297366 markings/sec, 85 secs
lola: 28385746 markings, 52022065 edges, 298988 markings/sec, 90 secs
lola: 29896229 markings, 54791406 edges, 302097 markings/sec, 95 secs
lola: 31415311 markings, 57576593 edges, 303816 markings/sec, 100 secs
lola: 32948552 markings, 60387776 edges, 306648 markings/sec, 105 secs
lola: 34500482 markings, 63233563 edges, 310386 markings/sec, 110 secs
lola: 36070055 markings, 66111111 edges, 313915 markings/sec, 115 secs
lola: 37646823 markings, 69002370 edges, 315354 markings/sec, 120 secs
lola: 39241476 markings, 71926246 edges, 318931 markings/sec, 125 secs
lola: 40834293 markings, 74846974 edges, 318563 markings/sec, 130 secs
lola: 42430766 markings, 77774261 edges, 319295 markings/sec, 135 secs
lola: 44045588 markings, 80735298 edges, 322964 markings/sec, 140 secs
lola: 45741728 markings, 83845576 edges, 339228 markings/sec, 145 secs
lola: 47562615 markings, 87185038 edges, 364177 markings/sec, 150 secs
lola: 48992804 markings, 89603383 edges, 286038 markings/sec, 155 secs
lola: 50169650 markings, 91515781 edges, 235369 markings/sec, 160 secs
lola: 51331872 markings, 93404613 edges, 232444 markings/sec, 165 secs
lola: 52485385 markings, 95279173 edges, 230703 markings/sec, 170 secs
lola: 53633284 markings, 97145066 edges, 229580 markings/sec, 175 secs
lola: 54778930 markings, 99006977 edges, 229129 markings/sec, 180 secs
lola: 55920778 markings, 100863046 edges, 228370 markings/sec, 185 secs
lola: 57056974 markings, 102709614 edges, 227239 markings/sec, 190 secs
lola: 58190125 markings, 104551408 edges, 226630 markings/sec, 195 secs
lola: 59321745 markings, 106390486 edges, 226324 markings/sec, 200 secs
lola: 60456115 markings, 108234162 edges, 226874 markings/sec, 205 secs
lola: 61590400 markings, 110077990 edges, 226857 markings/sec, 210 secs
lola: 62721144 markings, 111915863 edges, 226149 markings/sec, 215 secs
lola: 63849831 markings, 113750734 edges, 225737 markings/sec, 220 secs
lola: 64979185 markings, 115585623 edges, 225871 markings/sec, 225 secs
lola: 66086533 markings, 117386121 edges, 221470 markings/sec, 230 secs
lola: 67121827 markings, 119068332 edges, 207059 markings/sec, 235 secs
lola: 68140644 markings, 120724947 edges, 203763 markings/sec, 240 secs
lola: 69179513 markings, 122413452 edges, 207774 markings/sec, 245 secs
lola: 70220048 markings, 124104803 edges, 208107 markings/sec, 250 secs
lola: 71260768 markings, 125795760 edges, 208144 markings/sec, 255 secs
lola: 72385714 markings, 127625196 edges, 224989 markings/sec, 260 secs
lola: 73524089 markings, 129474864 edges, 227675 markings/sec, 265 secs
lola: 74661401 markings, 131323320 edges, 227462 markings/sec, 270 secs
lola: 75800183 markings, 133174476 edges, 227756 markings/sec, 275 secs
lola: 76938853 markings, 135025794 edges, 227734 markings/sec, 280 secs
lola: 78079196 markings, 136878753 edges, 228069 markings/sec, 285 secs
lola: 79220318 markings, 138733799 edges, 228224 markings/sec, 290 secs
lola: 80366858 markings, 140597544 edges, 229308 markings/sec, 295 secs
lola: 81517903 markings, 142468139 edges, 230209 markings/sec, 300 secs
lola: 82670781 markings, 144342296 edges, 230576 markings/sec, 305 secs
lola: 83825430 markings, 146219455 edges, 230930 markings/sec, 310 secs
lola: 84986293 markings, 148106261 edges, 232173 markings/sec, 315 secs
lola: 86150715 markings, 149998593 edges, 232884 markings/sec, 320 secs
lola: 87319828 markings, 151899180 edges, 233823 markings/sec, 325 secs
lola: 88492340 markings, 153805237 edges, 234502 markings/sec, 330 secs
lola: 89669209 markings, 155717955 edges, 235374 markings/sec, 335 secs
lola: 90851027 markings, 157639853 edges, 236364 markings/sec, 340 secs
lola: 92039412 markings, 159571283 edges, 237677 markings/sec, 345 secs
lola: 93236858 markings, 161517968 edges, 239489 markings/sec, 350 secs
lola: 94048336 markings, 162836905 edges, 162296 markings/sec, 355 secs
lola: 94340092 markings, 163310972 edges, 58351 markings/sec, 360 secs
lola: 94345602 markings, 163320468 edges, 1102 markings/sec, 365 secs
lola: 94349062 markings, 163325980 edges, 692 markings/sec, 370 secs
lola: 94350891 markings, 163328856 edges, 366 markings/sec, 375 secs
lola: Child process aborted or communication problem between parent and child process
lola: subprocess 14 will run for 1462 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: A (F (G ((F ((p_i1 <= off)) AND ((3 <= p_rel) OR (p_i1 <= off))))))
lola: ========================================
lola: SUBTASK
lola: checking LTL
lola: transforming LTL-Formula into a Büchi-Automaton
lola: processed formula: A (F (G ((F ((p_i1 <= off)) AND ((3 <= p_rel) OR (p_i1 <= off))))))
lola: processed formula length: 67
lola: 14 rewrites
lola: closed formula file LTLCardinality.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: 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: 1922401 markings, 2638483 edges, 384480 markings/sec, 0 secs
lola: 3737744 markings, 5134611 edges, 363069 markings/sec, 5 secs
lola: 5496677 markings, 7553232 edges, 351787 markings/sec, 10 secs
lola: 7245341 markings, 9957186 edges, 349733 markings/sec, 15 secs
lola: 8981835 markings, 12344748 edges, 347299 markings/sec, 20 secs
lola: 10716633 markings, 14730806 edges, 346960 markings/sec, 25 secs
lola: 12444980 markings, 17107500 edges, 345669 markings/sec, 30 secs
lola: 14166530 markings, 19473814 edges, 344310 markings/sec, 35 secs
lola: 15881818 markings, 21832695 edges, 343058 markings/sec, 40 secs
lola: 17595866 markings, 24189978 edges, 342810 markings/sec, 45 secs
lola: 19315450 markings, 26553949 edges, 343917 markings/sec, 50 secs
lola: 21031817 markings, 28913860 edges, 343273 markings/sec, 55 secs
lola: 22751487 markings, 31278553 edges, 343934 markings/sec, 60 secs
lola: 24468370 markings, 33639975 edges, 343377 markings/sec, 65 secs
lola: 26188442 markings, 36005233 edges, 344014 markings/sec, 70 secs
lola: 27903096 markings, 38362216 edges, 342931 markings/sec, 75 secs
lola: 29615924 markings, 40717492 edges, 342566 markings/sec, 80 secs
lola: 31330823 markings, 43075498 edges, 342980 markings/sec, 85 secs
lola: 33048020 markings, 45436744 edges, 343439 markings/sec, 90 secs
lola: 34769977 markings, 47804949 edges, 344391 markings/sec, 95 secs
lola: 36500690 markings, 50184068 edges, 346143 markings/sec, 100 secs
lola: 38229976 markings, 52562348 edges, 345857 markings/sec, 105 secs
lola: 39974708 markings, 54960764 edges, 348946 markings/sec, 110 secs
lola: 41725797 markings, 57369329 edges, 350218 markings/sec, 115 secs
lola: 43485934 markings, 59789334 edges, 352027 markings/sec, 120 secs
lola: 45258311 markings, 62226574 edges, 354475 markings/sec, 125 secs
lola: 47042487 markings, 64679354 edges, 356835 markings/sec, 130 secs
lola: 48847236 markings, 67161316 edges, 360950 markings/sec, 135 secs
lola: 50667774 markings, 69664148 edges, 364108 markings/sec, 140 secs
lola: 52504977 markings, 72190489 edges, 367441 markings/sec, 145 secs
lola: 54364663 markings, 74747493 edges, 371937 markings/sec, 150 secs
lola: 56256965 markings, 77349625 edges, 378460 markings/sec, 155 secs
lola: 58195695 markings, 80015442 edges, 387746 markings/sec, 160 secs
lola: 60200821 markings, 82772830 edges, 401025 markings/sec, 165 secs
lola: 62265832 markings, 85612286 edges, 413002 markings/sec, 170 secs
lola: 64067999 markings, 88089996 edges, 360433 markings/sec, 175 secs
lola: 64067999 markings, 88089996 edges, 0 markings/sec, 180 secs
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: 64067999 markings, 88089996 edges
lola: ========================================
lola: subprocess 15 will run for 2734 seconds at most (--localtimelimit=0)
lola: ========================================
lola: ...considering subproblem: (A (F (G ((r_active <= p_i1)))) AND A (G ((F ((3 <= access)) OR G ((r_active <= p_i1))))))
lola: ========================================
lola: SUBTASK
lola: checking a Boolean combination of formulas
lola: RUNNING
lola: time limit reached - aborting
lola:
preliminary result: no no no no yes no unknown yes no unknown unknown no yes yes no no
lola:
preliminary result: no no no no yes no unknown yes no unknown unknown no yes yes no no
lola: caught signal User defined signal 1 - aborting LoLA
lola:
preliminary result: no no no no yes no unknown yes no unknown unknown no yes yes no no
lola: memory consumption: 16904 KB
lola: time consumption: 3570 seconds
lola: print data as JSON (--json)
lola: memory consumption: 16904 KB
lola: time consumption: 3570 seconds
lola: print data as JSON (--json)
lola: writing JSON to LTLCardinality.json
lola: writing JSON to LTLCardinality.json
lola: lola: closed JSON file LTLCardinality.json
closed JSON file LTLCardinality.json
lola: caught signal User defined signal 1 - aborting LoLA
rslt: finished

BK_STOP 1552998943259

--------------------
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="RobotManipulation-PT-02000"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="lola"
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 2-3954"
echo " Executing tool lola"
echo " Input is RobotManipulation-PT-02000, 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 r148-ebro-155286403900240"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/RobotManipulation-PT-02000.tgz
mv RobotManipulation-PT-02000 execution
cd execution
if [ "LTLCardinality" = "GlobalProperties" ] ; then
rm -f GenericPropertiesVerdict.xml
fi
if [ "LTLCardinality" = "UpperBounds" ] ; 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
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 ;