About the Execution of GreatSPN+red for Szymanski-PT-b10
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
16162.479 | 3600000.00 | 5433025.00 | 9348.60 | FFFFT???T?FFT??? | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2024-input.r399-tall-171690531300892.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-5568
Executing tool greatspnxred
Input is Szymanski-PT-b10, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r399-tall-171690531300892
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 4.1M
-rw-r--r-- 1 mcc users 6.6K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 71K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.4K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 49K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.4K May 19 07:17 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K May 19 16:45 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K May 19 07:37 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K May 19 19:28 LTLFireability.xml
-rw-r--r-- 1 mcc users 13K Apr 11 15:05 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 141K Apr 11 15:05 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 4.5K Apr 11 15:03 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 29K Apr 11 15:03 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.5K May 19 07:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K May 19 15:31 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:43 equiv_col
-rw-r--r-- 1 mcc users 4 May 18 16:43 instance
-rw-r--r-- 1 mcc users 6 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 3.7M May 18 16:43 model.pnml
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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 Szymanski-PT-b10-LTLFireability-00
FORMULA_NAME Szymanski-PT-b10-LTLFireability-01
FORMULA_NAME Szymanski-PT-b10-LTLFireability-02
FORMULA_NAME Szymanski-PT-b10-LTLFireability-03
FORMULA_NAME Szymanski-PT-b10-LTLFireability-04
FORMULA_NAME Szymanski-PT-b10-LTLFireability-05
FORMULA_NAME Szymanski-PT-b10-LTLFireability-06
FORMULA_NAME Szymanski-PT-b10-LTLFireability-07
FORMULA_NAME Szymanski-PT-b10-LTLFireability-08
FORMULA_NAME Szymanski-PT-b10-LTLFireability-09
FORMULA_NAME Szymanski-PT-b10-LTLFireability-10
FORMULA_NAME Szymanski-PT-b10-LTLFireability-11
FORMULA_NAME Szymanski-PT-b10-LTLFireability-12
FORMULA_NAME Szymanski-PT-b10-LTLFireability-13
FORMULA_NAME Szymanski-PT-b10-LTLFireability-14
FORMULA_NAME Szymanski-PT-b10-LTLFireability-15
=== Now, execution of the tool begins
BK_START 1717106600193
Invoking MCC driver with
BK_TOOL=greatspnxred
BK_EXAMINATION=LTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Szymanski-PT-b10
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool greatspn
Invoking reducer
Running Version 202405141337
[2024-05-30 22:03:21] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -timeout, 360, -rebuildPNML]
[2024-05-30 22:03:21] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-30 22:03:21] [INFO ] Load time of PNML (sax parser for PT used): 330 ms
[2024-05-30 22:03:21] [INFO ] Transformed 568 places.
[2024-05-30 22:03:21] [INFO ] Transformed 8320 transitions.
[2024-05-30 22:03:21] [INFO ] Parsed PT model containing 568 places and 8320 transitions and 33408 arcs in 468 ms.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 13 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 6 formulas.
Deduced a syphon composed of 260 places in 18 ms
Reduce places removed 260 places and 256 transitions.
FORMULA Szymanski-PT-b10-LTLFireability-00 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Szymanski-PT-b10-LTLFireability-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Szymanski-PT-b10-LTLFireability-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Szymanski-PT-b10-LTLFireability-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Szymanski-PT-b10-LTLFireability-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Szymanski-PT-b10-LTLFireability-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 43 out of 308 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 308/308 places, 8064/8064 transitions.
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 2 place count 306 transition count 8064
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 3 place count 305 transition count 7936
Iterating global reduction 1 with 1 rules applied. Total rules applied 4 place count 305 transition count 7936
Applied a total of 4 rules in 195 ms. Remains 305 /308 variables (removed 3) and now considering 7936/8064 (removed 128) transitions.
[2024-05-30 22:03:22] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
// Phase 1: matrix 2732 rows 305 cols
[2024-05-30 22:03:22] [INFO ] Computed 1 invariants in 42 ms
[2024-05-30 22:03:22] [INFO ] Implicit Places using invariants in 609 ms returned []
[2024-05-30 22:03:22] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:03:22] [INFO ] Invariant cache hit.
[2024-05-30 22:03:24] [INFO ] State equation strengthened by 147 read => feed constraints.
[2024-05-30 22:03:43] [INFO ] Implicit Places using invariants and state equation in 20664 ms returned []
Implicit Place search using SMT with State Equation took 21309 ms to find 0 implicit places.
Running 7934 sub problems to find dead transitions.
[2024-05-30 22:03:43] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:03:43] [INFO ] Invariant cache hit.
[2024-05-30 22:03:43] [INFO ] State equation strengthened by 147 read => feed constraints.
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30176 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 7934/7934 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 7934 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30095 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 0/7934 constraints, Known Traps: 0/0 constraints]
After SMT, in 89031ms problems are : Problem set: 0 solved, 7934 unsolved
Search for dead transitions found 0 dead transitions in 89135ms
Starting structural reductions in LTL mode, iteration 1 : 305/308 places, 7936/8064 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 110708 ms. Remains : 305/308 places, 7936/8064 transitions.
Support contains 43 out of 305 places after structural reductions.
[2024-05-30 22:05:13] [INFO ] Flatten gal took : 434 ms
[2024-05-30 22:05:13] [INFO ] Flatten gal took : 265 ms
[2024-05-30 22:05:14] [INFO ] Input system was already deterministic with 7936 transitions.
Support contains 41 out of 305 places (down from 43) after GAL structural reductions.
Reduction of identical properties reduced properties to check from 22 to 21
RANDOM walk for 40016 steps (11 resets) in 1684 ms. (23 steps per ms) remains 15/21 properties
BEST_FIRST walk for 4003 steps (8 resets) in 94 ms. (42 steps per ms) remains 15/15 properties
BEST_FIRST walk for 4004 steps (8 resets) in 27 ms. (143 steps per ms) remains 14/15 properties
BEST_FIRST walk for 4003 steps (8 resets) in 24 ms. (160 steps per ms) remains 13/14 properties
BEST_FIRST walk for 4003 steps (8 resets) in 19 ms. (200 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4003 steps (8 resets) in 14 ms. (266 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4003 steps (8 resets) in 17 ms. (222 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4004 steps (8 resets) in 21 ms. (182 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4004 steps (8 resets) in 19 ms. (200 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4004 steps (8 resets) in 11 ms. (333 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4004 steps (8 resets) in 16 ms. (235 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4003 steps (8 resets) in 13 ms. (285 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4001 steps (8 resets) in 10 ms. (363 steps per ms) remains 13/13 properties
BEST_FIRST walk for 4004 steps (8 resets) in 22 ms. (174 steps per ms) remains 13/13 properties
[2024-05-30 22:05:14] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:05:14] [INFO ] Invariant cache hit.
[2024-05-30 22:05:14] [INFO ] State equation strengthened by 147 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/26 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 1 (OVERLAPS) 279/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/305 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 3 (OVERLAPS) 2732/3037 variables, 305/306 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/3037 variables, 147/453 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/3037 variables, 0/453 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 6 (OVERLAPS) 0/3037 variables, 0/453 constraints. Problems are: Problem set: 0 solved, 13 unsolved
No progress, stopping.
After SMT solving in domain Real declared 3037/3037 variables, and 453 constraints, problems are : Problem set: 0 solved, 13 unsolved in 2355 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 305/305 constraints, ReadFeed: 147/147 constraints, PredecessorRefiner: 13/13 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 13 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/26 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 1 (OVERLAPS) 279/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/305 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 3 (OVERLAPS) 2732/3037 variables, 305/306 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/3037 variables, 147/453 constraints. Problems are: Problem set: 0 solved, 13 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/3037 variables, 13/466 constraints. Problems are: Problem set: 0 solved, 13 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 3037/3037 variables, and 466 constraints, problems are : Problem set: 0 solved, 13 unsolved in 5010 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 305/305 constraints, ReadFeed: 147/147 constraints, PredecessorRefiner: 13/13 constraints, Known Traps: 0/0 constraints]
After SMT, in 7443ms problems are : Problem set: 0 solved, 13 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 26 out of 305 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 305/305 places, 7936/7936 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 54 transitions
Reduce isomorphic transitions removed 54 transitions.
Iterating post reduction 0 with 54 rules applied. Total rules applied 54 place count 305 transition count 7882
Applied a total of 54 rules in 375 ms. Remains 305 /305 variables (removed 0) and now considering 7882/7936 (removed 54) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 377 ms. Remains : 305/305 places, 7882/7936 transitions.
RANDOM walk for 40013 steps (8 resets) in 243 ms. (163 steps per ms) remains 13/13 properties
BEST_FIRST walk for 40004 steps (9 resets) in 112 ms. (354 steps per ms) remains 13/13 properties
BEST_FIRST walk for 40004 steps (10 resets) in 98 ms. (404 steps per ms) remains 12/13 properties
BEST_FIRST walk for 40003 steps (9 resets) in 133 ms. (298 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (10 resets) in 83 ms. (476 steps per ms) remains 11/12 properties
BEST_FIRST walk for 40003 steps (14 resets) in 120 ms. (330 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (10 resets) in 85 ms. (465 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (12 resets) in 108 ms. (367 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (10 resets) in 86 ms. (459 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40003 steps (9 resets) in 66 ms. (597 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (10 resets) in 63 ms. (625 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40003 steps (9 resets) in 82 ms. (481 steps per ms) remains 11/11 properties
[2024-05-30 22:05:23] [INFO ] Flow matrix only has 2678 transitions (discarded 5204 similar events)
// Phase 1: matrix 2678 rows 305 cols
[2024-05-30 22:05:23] [INFO ] Computed 1 invariants in 28 ms
[2024-05-30 22:05:23] [INFO ] State equation strengthened by 147 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/21 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 1 (OVERLAPS) 284/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/305 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 3 (OVERLAPS) 2678/2983 variables, 305/306 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/2983 variables, 147/453 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/2983 variables, 0/453 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 6 (OVERLAPS) 0/2983 variables, 0/453 constraints. Problems are: Problem set: 0 solved, 11 unsolved
No progress, stopping.
After SMT solving in domain Real declared 2983/2983 variables, and 453 constraints, problems are : Problem set: 0 solved, 11 unsolved in 4510 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 305/305 constraints, ReadFeed: 147/147 constraints, PredecessorRefiner: 11/11 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 11 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/21 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 1 (OVERLAPS) 284/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/305 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 3 (OVERLAPS) 2678/2983 variables, 305/306 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/2983 variables, 147/453 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/2983 variables, 11/464 constraints. Problems are: Problem set: 0 solved, 11 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/2983 variables, 0/464 constraints. Problems are: Problem set: 0 solved, 11 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 2983/2983 variables, and 464 constraints, problems are : Problem set: 0 solved, 11 unsolved in 45019 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 305/305 constraints, ReadFeed: 147/147 constraints, PredecessorRefiner: 11/11 constraints, Known Traps: 0/0 constraints]
After SMT, in 49635ms problems are : Problem set: 0 solved, 11 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 21 out of 305 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 305/305 places, 7882/7882 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 60 transitions
Reduce isomorphic transitions removed 60 transitions.
Iterating post reduction 0 with 60 rules applied. Total rules applied 60 place count 305 transition count 7822
Applied a total of 60 rules in 229 ms. Remains 305 /305 variables (removed 0) and now considering 7822/7882 (removed 60) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 229 ms. Remains : 305/305 places, 7822/7882 transitions.
RANDOM walk for 40005 steps (8 resets) in 201 ms. (198 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40003 steps (8 resets) in 77 ms. (512 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 47 ms. (833 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40003 steps (8 resets) in 112 ms. (354 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40003 steps (8 resets) in 65 ms. (606 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40003 steps (8 resets) in 46 ms. (851 steps per ms) remains 9/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 56 ms. (701 steps per ms) remains 9/9 properties
BEST_FIRST walk for 40004 steps (8 resets) in 61 ms. (645 steps per ms) remains 8/9 properties
BEST_FIRST walk for 40004 steps (8 resets) in 65 ms. (606 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40004 steps (8 resets) in 123 ms. (322 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40004 steps (8 resets) in 44 ms. (888 steps per ms) remains 8/8 properties
[2024-05-30 22:06:13] [INFO ] Flow matrix only has 2618 transitions (discarded 5204 similar events)
// Phase 1: matrix 2618 rows 305 cols
[2024-05-30 22:06:13] [INFO ] Computed 1 invariants in 16 ms
[2024-05-30 22:06:13] [INFO ] State equation strengthened by 147 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/15 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 1 (OVERLAPS) 290/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 8 unsolved
[2024-05-30 22:06:14] [INFO ] Deduced a trap composed of 37 places in 391 ms of which 16 ms to minimize.
At refinement iteration 2 (INCLUDED_ONLY) 0/305 variables, 1/2 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/305 variables, 0/2 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 4 (OVERLAPS) 2618/2923 variables, 305/307 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/2923 variables, 147/454 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/2923 variables, 0/454 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 7 (OVERLAPS) 0/2923 variables, 0/454 constraints. Problems are: Problem set: 0 solved, 8 unsolved
No progress, stopping.
After SMT solving in domain Real declared 2923/2923 variables, and 454 constraints, problems are : Problem set: 0 solved, 8 unsolved in 9453 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 305/305 constraints, ReadFeed: 147/147 constraints, PredecessorRefiner: 8/8 constraints, Known Traps: 1/1 constraints]
Escalating to Integer solving :Problem set: 0 solved, 8 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/15 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 1 (OVERLAPS) 290/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/305 variables, 1/2 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/305 variables, 0/2 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 4 (OVERLAPS) 2618/2923 variables, 305/307 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/2923 variables, 147/454 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/2923 variables, 8/462 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/2923 variables, 0/462 constraints. Problems are: Problem set: 0 solved, 8 unsolved
At refinement iteration 8 (OVERLAPS) 0/2923 variables, 0/462 constraints. Problems are: Problem set: 0 solved, 8 unsolved
No progress, stopping.
After SMT solving in domain Int declared 2923/2923 variables, and 462 constraints, problems are : Problem set: 0 solved, 8 unsolved in 27403 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 305/305 constraints, ReadFeed: 147/147 constraints, PredecessorRefiner: 8/8 constraints, Known Traps: 1/1 constraints]
After SMT, in 36940ms problems are : Problem set: 0 solved, 8 unsolved
Parikh walk visited 1 properties in 4768 ms.
Support contains 13 out of 305 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 305/305 places, 7822/7822 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 0 with 4 rules applied. Total rules applied 4 place count 305 transition count 7818
Applied a total of 4 rules in 310 ms. Remains 305 /305 variables (removed 0) and now considering 7818/7822 (removed 4) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 310 ms. Remains : 305/305 places, 7818/7822 transitions.
Computed a total of 11 stabilizing places and 2304 stable transitions
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202405141337/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F((!p0 U (G(!p0)||(!p0&&G(p1)))))))'
Support contains 4 out of 305 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 305/305 places, 7936/7936 transitions.
Applied a total of 0 rules in 332 ms. Remains 305 /305 variables (removed 0) and now considering 7936/7936 (removed 0) transitions.
[2024-05-30 22:06:56] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
// Phase 1: matrix 2732 rows 305 cols
[2024-05-30 22:06:56] [INFO ] Computed 1 invariants in 20 ms
[2024-05-30 22:06:56] [INFO ] Implicit Places using invariants in 480 ms returned []
[2024-05-30 22:06:56] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:06:56] [INFO ] Invariant cache hit.
[2024-05-30 22:06:58] [INFO ] State equation strengthened by 147 read => feed constraints.
[2024-05-30 22:07:28] [INFO ] Implicit Places using invariants and state equation in 31287 ms returned []
Implicit Place search using SMT with State Equation took 31774 ms to find 0 implicit places.
[2024-05-30 22:07:28] [INFO ] Redundant transitions in 862 ms returned []
Running 7934 sub problems to find dead transitions.
[2024-05-30 22:07:28] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:07:28] [INFO ] Invariant cache hit.
[2024-05-30 22:07:29] [INFO ] State equation strengthened by 147 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30097 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 7934/7934 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 7934 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30092 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 0/7934 constraints, Known Traps: 0/0 constraints]
After SMT, in 89665ms problems are : Problem set: 0 solved, 7934 unsolved
Search for dead transitions found 0 dead transitions in 89733ms
Finished structural reductions in SI_LTL mode , in 1 iterations and 122735 ms. Remains : 305/305 places, 7936/7936 transitions.
Stuttering acceptance computed with spot in 290 ms :[p0, p0, (AND (NOT p1) p0)]
Running random walk in product with property : Szymanski-PT-b10-LTLFireability-01
Product exploration explored 100000 steps with 1 reset in 515 ms.
Stack based approach found an accepted trace after 625 steps with 1 reset with depth 409 and stack size 403 in 7 ms.
FORMULA Szymanski-PT-b10-LTLFireability-01 FALSE TECHNIQUES STACK_TEST
Treatment of property Szymanski-PT-b10-LTLFireability-01 finished in 123658 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202405141337/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(((p1 U !p0)&&X(p2))))))'
Support contains 6 out of 305 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 305/305 places, 7936/7936 transitions.
Applied a total of 0 rules in 64 ms. Remains 305 /305 variables (removed 0) and now considering 7936/7936 (removed 0) transitions.
[2024-05-30 22:08:59] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:08:59] [INFO ] Invariant cache hit.
[2024-05-30 22:09:00] [INFO ] Implicit Places using invariants in 449 ms returned []
[2024-05-30 22:09:00] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:09:00] [INFO ] Invariant cache hit.
[2024-05-30 22:09:01] [INFO ] State equation strengthened by 147 read => feed constraints.
[2024-05-30 22:09:23] [INFO ] Implicit Places using invariants and state equation in 23304 ms returned []
Implicit Place search using SMT with State Equation took 23755 ms to find 0 implicit places.
Running 7934 sub problems to find dead transitions.
[2024-05-30 22:09:23] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:09:23] [INFO ] Invariant cache hit.
[2024-05-30 22:09:23] [INFO ] State equation strengthened by 147 read => feed constraints.
Error getting values : (error "ParserException while parsing response: ((s0 1.0)
(s1 1.0)
(s2 1.0)
(s3 1.0)
(s4 1.0)
(s5 1.0)
(s6 1.0)
(s7 1.0)
(s8 1.0)
(s9 1.0)
(s10 1.0)
(s11 1.0)
(s12 1.0)
(s13 1.0)
(s14 1.0)
(s15 1.0)
(s16 1.0)
(s17 1.0)
(s18 1.0)
(s19 1.0)
(s20 1.0)
(s21 timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30136 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 7934/7934 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 7934 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30110 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 0/7934 constraints, Known Traps: 0/0 constraints]
After SMT, in 94673ms problems are : Problem set: 0 solved, 7934 unsolved
Search for dead transitions found 0 dead transitions in 94749ms
Finished structural reductions in LTL mode , in 1 iterations and 118598 ms. Remains : 305/305 places, 7936/7936 transitions.
Stuttering acceptance computed with spot in 396 ms :[true, (NOT p0), (OR (NOT p2) p0), (NOT p2), p0]
Running random walk in product with property : Szymanski-PT-b10-LTLFireability-03
Stuttering criterion allowed to conclude after 572 steps with 0 reset in 6 ms.
FORMULA Szymanski-PT-b10-LTLFireability-03 FALSE TECHNIQUES STUTTER_TEST
Treatment of property Szymanski-PT-b10-LTLFireability-03 finished in 119055 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202405141337/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(p0))'
Support contains 2 out of 305 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 305/305 places, 7936/7936 transitions.
Applied a total of 0 rules in 80 ms. Remains 305 /305 variables (removed 0) and now considering 7936/7936 (removed 0) transitions.
[2024-05-30 22:10:58] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:10:58] [INFO ] Invariant cache hit.
[2024-05-30 22:10:59] [INFO ] Implicit Places using invariants in 556 ms returned []
[2024-05-30 22:10:59] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:10:59] [INFO ] Invariant cache hit.
[2024-05-30 22:11:00] [INFO ] State equation strengthened by 147 read => feed constraints.
[2024-05-30 22:11:31] [INFO ] Performed 284/305 implicitness test of which 0 returned IMPLICIT in 30 seconds.
[2024-05-30 22:11:37] [INFO ] Implicit Places using invariants and state equation in 37989 ms returned []
Implicit Place search using SMT with State Equation took 38555 ms to find 0 implicit places.
Running 7934 sub problems to find dead transitions.
[2024-05-30 22:11:37] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:11:37] [INFO ] Invariant cache hit.
[2024-05-30 22:11:37] [INFO ] State equation strengthened by 147 read => feed constraints.
Error getting values : (error "ParserException while parsing response: ((s0 1.0)
(s1 1.0)
(s2 1.0)
(s3 1.0)
(s4 1.0)
(s5 1.0)
(s6 1.0)
(s7 1.0)
(s8 1.0)
(s9 1.0)
(s10 1.0)
(s11 1.0)
(s12 1.0)
(s13 1.0)
(s14 1.0)
(s15 1.0)
(s16 1.0)
(s17 1.0)
(s18 1.0)
(s19 1.0)
(s20 1.0)
(s21 1.0)
(s22 1.0)
(s23 1.0)
(s24 1.0)
(s25 1.0)
(s26 1.0)
(s27 1.0)
(s28 1.0)
(s29 1.0)
(s30 1.0)
(s31 1.0)
(s32 1.0)
(s33 1.0)
(s34 1.0)
(s35 1.0)
(s36 1.0)
(s37 1.0)
(s38 1.0)
(s39 1.0)
(s40 1.0)
(s41 1.0)
(s42 1.0)
(s43 1.0)
(s44 1.0)
(s45 1.0)
(s46 1.0)
(s47 1.0)
(s48 1.0)
(s49 1.0)
(s50 1.0)
(s51 timeout
1.0 org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30114 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 7934/7934 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 7934 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/305 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 7934 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 305/3037 variables, and 1 constraints, problems are : Problem set: 0 solved, 7934 unsolved in 30092 ms.
Refiners :[Generalized P Invariants (flows): 1/1 constraints, State Equation: 0/305 constraints, ReadFeed: 0/147 constraints, PredecessorRefiner: 0/7934 constraints, Known Traps: 0/0 constraints]
After SMT, in 92262ms problems are : Problem set: 0 solved, 7934 unsolved
Search for dead transitions found 0 dead transitions in 92342ms
Finished structural reductions in LTL mode , in 1 iterations and 131005 ms. Remains : 305/305 places, 7936/7936 transitions.
Stuttering acceptance computed with spot in 105 ms :[(NOT p0), (NOT p0), true]
Running random walk in product with property : Szymanski-PT-b10-LTLFireability-04
Product exploration explored 100000 steps with 50000 reset in 658 ms.
Product exploration explored 100000 steps with 50000 reset in 534 ms.
Computed a total of 11 stabilizing places and 2304 stable transitions
Computed a total of 11 stabilizing places and 2304 stable transitions
Knowledge obtained : [p0, (X p0)]
False Knowledge obtained : []
Property proved to be true thanks to knowledge (Minato strategy)
Knowledge based reduction with 2 factoid took 21 ms. Reduced automaton from 3 states, 3 edges and 1 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA Szymanski-PT-b10-LTLFireability-04 TRUE TECHNIQUES KNOWLEDGE
Treatment of property Szymanski-PT-b10-LTLFireability-04 finished in 132389 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202405141337/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((X((G(p1) U p2))||p0)))'
Support contains 6 out of 305 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 305/305 places, 7936/7936 transitions.
Applied a total of 0 rules in 28 ms. Remains 305 /305 variables (removed 0) and now considering 7936/7936 (removed 0) transitions.
[2024-05-30 22:13:10] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:13:10] [INFO ] Invariant cache hit.
[2024-05-30 22:13:11] [INFO ] Implicit Places using invariants in 408 ms returned []
[2024-05-30 22:13:11] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:13:11] [INFO ] Invariant cache hit.
[2024-05-30 22:13:12] [INFO ] State equation strengthened by 147 read => feed constraints.
[2024-05-30 22:13:42] [INFO ] Implicit Places using invariants and state equation in 31527 ms returned []
Implicit Place search using SMT with State Equation took 31937 ms to find 0 implicit places.
Running 7934 sub problems to find dead transitions.
[2024-05-30 22:13:43] [INFO ] Flow matrix only has 2732 transitions (discarded 5204 similar events)
[2024-05-30 22:13:43] [INFO ] Invariant cache hit.
[2024-05-30 22:13:43] [INFO ] State equation strengthened by 147 read => feed constraints.
----------------------------------------------------------------------
GreatSPN-meddly tool, MCC 2023
----------------------------------------------------------------------
Running Szymanski-PT-b10
IS_COLORED=
IS_NUPN=
LOADING PETRI NET FILE /home/mcc/execution/model.pnml (PNML) ...
PNML VERSION 2009, P/T NET.
COLOR CLASSES: 0
CONSTANTS: 0
PLACES: 568
TRANSITIONS: 8320
COLOR VARS: 0
MEASURES: 0
LOADING TIME: [User 0.165s, Sys 0.021s]
SAVING FILE /home/mcc/execution/model (.net / .def) ...
EXPORT TIME: [User 0.026s, Sys 0.000s]
----------------------------------------------------------------------
GreatSPN/Meddly.
Copyright (C) 1987-2022, University of Torino, Italy.
website: https://github.com/greatspn/SOURCES
Based on MEDDLY version 0.16.0
Copyright (C) 2009, Iowa State University Research Foundation, Inc.
website: http://meddly.sourceforge.net
Process ID: 709
MODEL NAME: /home/mcc/execution/model
568 places, 8320 transitions.
Creating all event NSFs..
Creating all event NSFs..
Creating all event NSFs..
Creating all event NSFs..
Split: SplitSubtract
Start RS construction.
Split: SplitSubtract
Start RS construction.
Split: SplitSubtract
Start RS construction.
Split: SplitSubtract
Start RS construction.
BK_TIME_CONFINEMENT_REACHED
--------------------
content from stderr:
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202405141337.jar
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination LTLFireability -timeout 360 -rebuildPNML
MEDDLY ERROR: Insufficient memory
MEDDLY ERROR: Insufficient memory
MEDDLY ERROR: Insufficient memory
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="Szymanski-PT-b10"
export BK_EXAMINATION="LTLFireability"
export BK_TOOL="greatspnxred"
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 2-5568"
echo " Executing tool greatspnxred"
echo " Input is Szymanski-PT-b10, 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 r399-tall-171690531300892"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/Szymanski-PT-b10.tgz
mv Szymanski-PT-b10 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 ;