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.r601-tall-171774424000249.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)
.............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5568
Executing tool greatspnxred
Input is BlocksWorld-PT-12, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r601-tall-171774424000249
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 59M
-rw-r--r-- 1 mcc users 885K Jun 7 06:38 CTLCardinality.txt
-rw-r--r-- 1 mcc users 3.9M Jun 7 06:38 CTLCardinality.xml
-rw-r--r-- 1 mcc users 1.4M Jun 7 06:38 CTLFireability.txt
-rw-r--r-- 1 mcc users 7.2M Jun 7 06:38 CTLFireability.xml
-rw-r--r-- 1 mcc users 37K Jun 7 06:44 LTLCardinality.txt
-rw-r--r-- 1 mcc users 119K Jun 7 06:44 LTLCardinality.xml
-rw-r--r-- 1 mcc users 989K Jun 7 06:44 LTLFireability.txt
-rw-r--r-- 1 mcc users 3.7M Jun 7 06:44 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 Jun 7 06:26 NewModel
-rw-r--r-- 1 mcc users 1.1M Jun 7 06:39 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 4.3M Jun 7 06:39 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 5.0M Jun 7 06:39 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 27M Jun 7 06:39 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 119K Jun 7 06:43 UpperBounds.txt
-rw-r--r-- 1 mcc users 286K Jun 7 06:43 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Jun 7 06:26 equiv_col
-rw-r--r-- 1 mcc users 3 Jun 7 06:26 instance
-rw-r--r-- 1 mcc users 6 Jun 7 06:26 iscolored
-rw-r--r-- 1 mcc users 3.8M Jun 7 06:26 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 BlocksWorld-PT-12-CTLCardinality-2024-00
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-01
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-02
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-03
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-04
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-05
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-06
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-07
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-08
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-09
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-10
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-11
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-12
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-13
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-14
FORMULA_NAME BlocksWorld-PT-12-CTLCardinality-2024-15

=== Now, execution of the tool begins

BK_START 1717775799182

Invoking MCC driver with
BK_TOOL=greatspnxred
BK_EXAMINATION=CTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=BlocksWorld-PT-12
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool greatspn
Invoking reducer
Running Version 202405141337
[2024-06-07 15:56:40] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -timeout, 360, -rebuildPNML]
[2024-06-07 15:56:40] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-06-07 15:56:40] [INFO ] Load time of PNML (sax parser for PT used): 373 ms
[2024-06-07 15:56:40] [INFO ] Transformed 4031 places.
[2024-06-07 15:56:40] [INFO ] Transformed 7813 transitions.
[2024-06-07 15:56:40] [INFO ] Found NUPN structural information;
[2024-06-07 15:56:40] [INFO ] Completing missing partition info from NUPN : creating a component with [pred_on_table_0, pred_arm_empty_0, pred_on_table_1, pred_on_table_2, pred_on_table_3, pred_on_table_4, pred_on_table_5, pred_on_table_6, pred_on_table_7, pred_on_table_8, pred_on_table_9, pred_on_table_10, pred_on_table_11, pred_on_table_12, pred_on_table_13, pred_on_table_14, pred_on_table_15, pred_on_table_16, pred_on_table_17, pred_on_table_18, pred_on_table_19, pred_on_table_20, pred_on_table_21, pred_on_table_22, pred_on_table_23, pred_on_table_24, pred_on_table_25, pred_on_table_26, pred_on_table_27, pred_on_table_28, pred_on_table_29, pred_on_table_30, pred_on_table_31, pred_on_table_32, pred_on_table_33, pred_on_table_34, pred_on_table_35, pred_on_table_36, pred_on_table_37, pred_on_table_38, pred_on_table_39, pred_on_table_40, pred_on_table_41, pred_on_table_42, pred_on_table_43, pred_on_table_44, pred_on_table_45, pred_on_table_46, pred_on_table_47, pred_on_table_48, pred_on_table_49, pred_on_table_50, pred_on_table_51, pred_on_table_52, pred_on_table_53, pred_on_table_54, pred_on_table_55, pred_on_table_56, pred_on_table_57, pred_on_table_58, pred_on_table_59, pred_on_table_60, pred_on_table_61]
[2024-06-07 15:56:41] [INFO ] Parsed PT model containing 4031 places and 7813 transitions and 39042 arcs in 544 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 193 ms.
Support contains 4031 out of 4031 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 4031/4031 places, 7813/7813 transitions.
Applied a total of 0 rules in 56 ms. Remains 4031 /4031 variables (removed 0) and now considering 7813/7813 (removed 0) transitions.
// Phase 1: matrix 7813 rows 4031 cols
[2024-06-07 15:56:41] [INFO ] Computed 125 invariants in 141 ms
[2024-06-07 15:56:42] [INFO ] Implicit Places using invariants in 1060 ms returned []
[2024-06-07 15:56:42] [INFO ] Invariant cache hit.
[2024-06-07 15:56:47] [INFO ] State equation strengthened by 113 read => feed constraints.
[2024-06-07 15:56:48] [INFO ] Implicit Places using invariants and state equation in 5227 ms returned []
Implicit Place search using SMT with State Equation took 6516 ms to find 0 implicit places.
Running 7807 sub problems to find dead transitions.
[2024-06-07 15:56:48] [INFO ] Invariant cache hit.
[2024-06-07 15:56:48] [INFO ] State equation strengthened by 113 read => feed constraints.
Problem TDEAD1 is UNSAT
Problem TDEAD63 is UNSAT
Problem TDEAD187 is UNSAT
Problem TDEAD250 is UNSAT
Problem TDEAD313 is UNSAT
Problem TDEAD376 is UNSAT
Problem TDEAD439 is UNSAT
Problem TDEAD502 is UNSAT
Problem TDEAD565 is UNSAT
Problem TDEAD628 is UNSAT
Problem TDEAD691 is UNSAT
Problem TDEAD754 is UNSAT
Problem TDEAD817 is UNSAT
Problem TDEAD880 is UNSAT
Problem TDEAD943 is UNSAT
Problem TDEAD1006 is UNSAT
Problem TDEAD1069 is UNSAT
Problem TDEAD1195 is UNSAT
Problem TDEAD1258 is UNSAT
Problem TDEAD1321 is UNSAT
Problem TDEAD1384 is UNSAT
Problem TDEAD1447 is UNSAT
Problem TDEAD1510 is UNSAT
Problem TDEAD1573 is UNSAT
Problem TDEAD1636 is UNSAT
Problem TDEAD1699 is UNSAT
Problem TDEAD1762 is UNSAT
Problem TDEAD1825 is UNSAT
Problem TDEAD1888 is UNSAT
Problem TDEAD2014 is UNSAT
Problem TDEAD2077 is UNSAT
Problem TDEAD2140 is UNSAT
Problem TDEAD2203 is UNSAT
Problem TDEAD2266 is UNSAT
Problem TDEAD2329 is UNSAT
Problem TDEAD2392 is UNSAT
Problem TDEAD2455 is UNSAT
Problem TDEAD2518 is UNSAT
Problem TDEAD2644 is UNSAT
Problem TDEAD2707 is UNSAT
Problem TDEAD2770 is UNSAT
Problem TDEAD2833 is UNSAT
Problem TDEAD2896 is UNSAT
Problem TDEAD2959 is UNSAT
Problem TDEAD3022 is UNSAT
Problem TDEAD3085 is UNSAT
Problem TDEAD3148 is UNSAT
Problem TDEAD3211 is UNSAT
Problem TDEAD3274 is UNSAT
Problem TDEAD3463 is UNSAT
Problem TDEAD3526 is UNSAT
Problem TDEAD3589 is UNSAT
Problem TDEAD3652 is UNSAT
Problem TDEAD3715 is UNSAT
Problem TDEAD3841 is UNSAT
Problem TDEAD3904 is UNSAT
Problem TDEAD3967 is UNSAT
Problem TDEAD4030 is UNSAT
Problem TDEAD4152 is UNSAT
Problem TDEAD4272 is UNSAT
Problem TDEAD4390 is UNSAT
Problem TDEAD4506 is UNSAT
Problem TDEAD4620 is UNSAT
Problem TDEAD4732 is UNSAT
Problem TDEAD4842 is UNSAT
Problem TDEAD4950 is UNSAT
Problem TDEAD5056 is UNSAT
Problem TDEAD5160 is UNSAT
Problem TDEAD5262 is UNSAT
Problem TDEAD5362 is UNSAT
Problem TDEAD5460 is UNSAT
Problem TDEAD5556 is UNSAT
Problem TDEAD5742 is UNSAT
Problem TDEAD5832 is UNSAT
Problem TDEAD5920 is UNSAT
Problem TDEAD6006 is UNSAT
Problem TDEAD6090 is UNSAT
Problem TDEAD6172 is UNSAT
Problem TDEAD6252 is UNSAT
Problem TDEAD6330 is UNSAT
Problem TDEAD6406 is UNSAT
Problem TDEAD6480 is UNSAT
Problem TDEAD6552 is UNSAT
Problem TDEAD6622 is UNSAT
Problem TDEAD6756 is UNSAT
Problem TDEAD6820 is UNSAT
Problem TDEAD6882 is UNSAT
Problem TDEAD6942 is UNSAT
Problem TDEAD7000 is UNSAT
Problem TDEAD7056 is UNSAT
Problem TDEAD7110 is UNSAT
Problem TDEAD7162 is UNSAT
Problem TDEAD7212 is UNSAT
Problem TDEAD7306 is UNSAT
Problem TDEAD7350 is UNSAT
Problem TDEAD7392 is UNSAT
Problem TDEAD7432 is UNSAT
Problem TDEAD7470 is UNSAT
Problem TDEAD7506 is UNSAT
Problem TDEAD7540 is UNSAT
Problem TDEAD7572 is UNSAT
Problem TDEAD7602 is UNSAT
Problem TDEAD7630 is UNSAT
Problem TDEAD7656 is UNSAT
Problem TDEAD7722 is UNSAT
Problem TDEAD7740 is UNSAT
Problem TDEAD7756 is UNSAT
Problem TDEAD7770 is UNSAT
Problem TDEAD7782 is UNSAT
Problem TDEAD7800 is UNSAT
Problem TDEAD7806 is UNSAT
Problem TDEAD7810 is UNSAT
At refinement iteration 0 (INCLUDED_ONLY) 0/4025 variables, 113/113 constraints. Problems are: Problem set: 112 solved, 7695 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 4025/11844 variables, and 113 constraints, problems are : Problem set: 112 solved, 7695 unsolved in 30343 ms.
Refiners :[Positive P Invariants (semi-flows): 113/125 constraints, State Equation: 0/4031 constraints, ReadFeed: 0/113 constraints, PredecessorRefiner: 7751/3907 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 112 solved, 7695 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/3969 variables, 7/7 constraints. Problems are: Problem set: 112 solved, 7695 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 3969/11844 variables, and 7 constraints, problems are : Problem set: 112 solved, 7695 unsolved in 30140 ms.
Refiners :[Positive P Invariants (semi-flows): 7/125 constraints, State Equation: 0/4031 constraints, ReadFeed: 0/113 constraints, PredecessorRefiner: 3844/3907 constraints, Known Traps: 0/0 constraints]
After SMT, in 132837ms problems are : Problem set: 112 solved, 7695 unsolved
Search for dead transitions found 112 dead transitions in 132952ms
Found 112 dead transitions using SMT.
Drop transitions (Dead Transitions using SMT only with invariants) removed 112 transitions
Dead transitions reduction (with SMT) removed 112 transitions
Starting structural reductions in LTL mode, iteration 1 : 4031/4031 places, 7701/7813 transitions.
Deduced a syphon composed of 56 places in 6 ms
Applied a total of 0 rules in 38 ms. Remains 4031 /4031 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 139652 ms. Remains : 4031/4031 places, 7701/7813 transitions.
Deduced a syphon composed of 56 places in 13 ms
Reduce places removed 56 places and 0 transitions.
Support contains 3975 out of 3975 places after structural reductions.
[2024-06-07 15:59:02] [INFO ] Flatten gal took : 712 ms
[2024-06-07 15:59:02] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-06-07 15:59:03] [INFO ] Flatten gal took : 370 ms
[2024-06-07 15:59:04] [INFO ] Input system was already deterministic with 7701 transitions.
RANDOM walk for 40000 steps (8 resets) in 45082 ms. (0 steps per ms) remains 32/51 properties
BEST_FIRST walk for 4004 steps (8 resets) in 1006 ms. (3 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 527 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 494 ms. (8 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 878 ms. (4 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 541 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 337 ms. (11 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 620 ms. (6 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 685 ms. (5 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 341 ms. (11 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 843 ms. (4 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4002 steps (8 resets) in 1285 ms. (3 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 539 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 322 ms. (12 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 880 ms. (4 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 577 ms. (6 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 1269 ms. (3 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 893 ms. (4 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 416 ms. (9 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 611 ms. (6 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 652 ms. (6 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 657 ms. (6 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 314 ms. (12 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 507 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 504 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 528 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 509 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4002 steps (8 resets) in 503 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 537 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4002 steps (8 resets) in 493 ms. (8 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4003 steps (8 resets) in 489 ms. (8 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4004 steps (8 resets) in 514 ms. (7 steps per ms) remains 32/32 properties
BEST_FIRST walk for 4002 steps (8 resets) in 521 ms. (7 steps per ms) remains 32/32 properties
// Phase 1: matrix 7701 rows 3975 cols
[2024-06-07 15:59:22] [INFO ] Computed 125 invariants in 50 ms
[2024-06-07 15:59:22] [INFO ] State equation strengthened by 13 read => feed constraints.
Problem AtomicPropp6 is UNSAT
Problem AtomicPropp0 is UNSAT
Problem AtomicPropp1 is UNSAT
Problem AtomicPropp2 is UNSAT
Problem AtomicPropp3 is UNSAT
Problem AtomicPropp4 is UNSAT
Problem AtomicPropp5 is UNSAT
Problem AtomicPropp9 is UNSAT
Problem AtomicPropp11 is UNSAT
Problem AtomicPropp12 is UNSAT
Problem AtomicPropp13 is UNSAT
Problem AtomicPropp14 is UNSAT
Problem AtomicPropp16 is UNSAT
Problem AtomicPropp17 is UNSAT
Problem AtomicPropp19 is UNSAT
Problem AtomicPropp22 is UNSAT
Problem AtomicPropp25 is UNSAT
Problem AtomicPropp31 is UNSAT
Problem AtomicPropp32 is UNSAT
Problem AtomicPropp33 is UNSAT
Problem AtomicPropp36 is UNSAT
Problem AtomicPropp45 is UNSAT
At refinement iteration 0 (INCLUDED_ONLY) 0/3975 variables, 125/125 constraints. Problems are: Problem set: 22 solved, 10 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 3975/11676 variables, and 125 constraints, problems are : Problem set: 22 solved, 10 unsolved in 5027 ms.
Refiners :[Positive P Invariants (semi-flows): 125/125 constraints, State Equation: 0/3975 constraints, ReadFeed: 0/13 constraints, PredecessorRefiner: 17/11 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 22 solved, 10 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/3913 variables, 0/0 constraints. Problems are: Problem set: 22 solved, 10 unsolved
At refinement iteration 1 (OVERLAPS) 62/3975 variables, 125/125 constraints. Problems are: Problem set: 22 solved, 10 unsolved
[2024-06-07 15:59:39] [INFO ] Deduced a trap composed of 183 places in 6388 ms of which 225 ms to minimize.
SMT process timed out in 17215ms, After SMT, problems are : Problem set: 22 solved, 10 unsolved
Fused 10 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 3913 out of 3975 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 3975 transition count 7700
Applied a total of 1 rules in 1403 ms. Remains 3975 /3975 variables (removed 0) and now considering 7700/7701 (removed 1) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1405 ms. Remains : 3975/3975 places, 7700/7701 transitions.
RANDOM walk for 40000 steps (8 resets) in 18413 ms. (2 steps per ms) remains 9/10 properties
BEST_FIRST walk for 40004 steps (8 resets) in 3964 ms. (10 steps per ms) remains 7/9 properties
BEST_FIRST walk for 40002 steps (8 resets) in 8139 ms. (4 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40004 steps (8 resets) in 6442 ms. (6 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40004 steps (8 resets) in 3446 ms. (11 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40003 steps (8 resets) in 3267 ms. (12 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40003 steps (8 resets) in 2149 ms. (18 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40002 steps (8 resets) in 2076 ms. (19 steps per ms) remains 7/7 properties
// Phase 1: matrix 7700 rows 3975 cols
[2024-06-07 15:59:53] [INFO ] Computed 125 invariants in 48 ms
[2024-06-07 15:59:53] [INFO ] State equation strengthened by 12 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/3913 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 7 unsolved
At refinement iteration 1 (OVERLAPS) 62/3975 variables, 125/125 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:00:03] [INFO ] Deduced a trap composed of 124 places in 5729 ms of which 28 ms to minimize.
[2024-06-07 16:00:09] [INFO ] Deduced a trap composed of 183 places in 6123 ms of which 36 ms to minimize.
At refinement iteration 2 (INCLUDED_ONLY) 0/3975 variables, 2/127 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:00:19] [INFO ] Deduced a trap composed of 183 places in 6281 ms of which 32 ms to minimize.
At refinement iteration 3 (INCLUDED_ONLY) 0/3975 variables, 1/128 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:00:29] [INFO ] Deduced a trap composed of 183 places in 5886 ms of which 29 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/3975 variables, 1/129 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:00:35] [INFO ] Deduced a trap composed of 240 places in 1847 ms of which 14 ms to minimize.
[2024-06-07 16:00:36] [INFO ] Deduced a trap composed of 124 places in 1380 ms of which 12 ms to minimize.
[2024-06-07 16:00:42] [INFO ] Deduced a trap composed of 663 places in 5625 ms of which 27 ms to minimize.
SMT process timed out in 48669ms, After SMT, problems are : Problem set: 0 solved, 7 unsolved
Fused 7 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 3913 out of 3975 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 3975/3975 places, 7700/7700 transitions.
Applied a total of 0 rules in 1334 ms. Remains 3975 /3975 variables (removed 0) and now considering 7700/7700 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1334 ms. Remains : 3975/3975 places, 7700/7700 transitions.
RANDOM walk for 40000 steps (8 resets) in 17957 ms. (2 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40004 steps (8 resets) in 3839 ms. (10 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40003 steps (8 resets) in 8083 ms. (4 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40004 steps (8 resets) in 6468 ms. (6 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40003 steps (8 resets) in 3464 ms. (11 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40003 steps (8 resets) in 3179 ms. (12 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2074 ms. (19 steps per ms) remains 7/7 properties
BEST_FIRST walk for 40002 steps (8 resets) in 2121 ms. (18 steps per ms) remains 7/7 properties
Interrupted probabilistic random walk after 189680 steps, run timeout after 36004 ms. (steps per millisecond=5 ) properties seen :0 out of 7
Probabilistic random walk after 189680 steps, saw 161014 distinct states, run finished after 36014 ms. (steps per millisecond=5 ) properties seen :0
[2024-06-07 16:01:31] [INFO ] Invariant cache hit.
[2024-06-07 16:01:31] [INFO ] State equation strengthened by 12 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/3913 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 7 unsolved
At refinement iteration 1 (OVERLAPS) 62/3975 variables, 125/125 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:01:38] [INFO ] Deduced a trap composed of 124 places in 3161 ms of which 19 ms to minimize.
[2024-06-07 16:01:42] [INFO ] Deduced a trap composed of 448 places in 3168 ms of which 20 ms to minimize.
[2024-06-07 16:01:44] [INFO ] Deduced a trap composed of 799 places in 2084 ms of which 16 ms to minimize.
[2024-06-07 16:01:44] [INFO ] Deduced a trap composed of 240 places in 335 ms of which 3 ms to minimize.
[2024-06-07 16:01:49] [INFO ] Deduced a trap composed of 988 places in 4234 ms of which 24 ms to minimize.
[2024-06-07 16:01:55] [INFO ] Deduced a trap composed of 183 places in 6411 ms of which 31 ms to minimize.
At refinement iteration 2 (INCLUDED_ONLY) 0/3975 variables, 6/131 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:02:05] [INFO ] Deduced a trap composed of 183 places in 6063 ms of which 28 ms to minimize.
[2024-06-07 16:02:11] [INFO ] Deduced a trap composed of 183 places in 6024 ms of which 29 ms to minimize.
At refinement iteration 3 (INCLUDED_ONLY) 0/3975 variables, 2/133 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:02:22] [INFO ] Deduced a trap composed of 183 places in 6237 ms of which 31 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/3975 variables, 1/134 constraints. Problems are: Problem set: 0 solved, 7 unsolved
[2024-06-07 16:02:31] [INFO ] Deduced a trap composed of 903 places in 5786 ms of which 28 ms to minimize.
[2024-06-07 16:02:35] [INFO ] Deduced a trap composed of 540 places in 3596 ms of which 21 ms to minimize.
[2024-06-07 16:02:37] [INFO ] Deduced a trap composed of 924 places in 2204 ms of which 16 ms to minimize.
[2024-06-07 16:02:39] [INFO ] Deduced a trap composed of 855 places in 1923 ms of which 14 ms to minimize.
At refinement iteration 5 (INCLUDED_ONLY) 0/3975 variables, 4/138 constraints. Problems are: Problem set: 0 solved, 7 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/3975 variables, 0/138 constraints. Problems are: Problem set: 0 solved, 7 unsolved
At refinement iteration 7 (OVERLAPS) 7700/11675 variables, 3975/4113 constraints. Problems are: Problem set: 0 solved, 7 unsolved
SMT process timed out in 76076ms, After SMT, problems are : Problem set: 0 solved, 7 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 3913 out of 3975 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 3975/3975 places, 7700/7700 transitions.
Applied a total of 0 rules in 1189 ms. Remains 3975 /3975 variables (removed 0) and now considering 7700/7700 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1191 ms. Remains : 3975/3975 places, 7700/7700 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 3975/3975 places, 7700/7700 transitions.
Applied a total of 0 rules in 1197 ms. Remains 3975 /3975 variables (removed 0) and now considering 7700/7700 (removed 0) transitions.
[2024-06-07 16:02:50] [INFO ] Invariant cache hit.
[2024-06-07 16:02:50] [INFO ] Implicit Places using invariants in 587 ms returned []
[2024-06-07 16:02:50] [INFO ] Invariant cache hit.
[2024-06-07 16:02:56] [INFO ] State equation strengthened by 12 read => feed constraints.
[2024-06-07 16:02:56] [INFO ] Implicit Places using invariants and state equation in 5680 ms returned []
Implicit Place search using SMT with State Equation took 6269 ms to find 0 implicit places.
[2024-06-07 16:02:57] [INFO ] Redundant transitions in 962 ms returned []
Running 7694 sub problems to find dead transitions.
[2024-06-07 16:02:57] [INFO ] Invariant cache hit.
[2024-06-07 16:02:57] [INFO ] State equation strengthened by 12 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) 0/3969 variables, 113/113 constraints. Problems are: Problem set: 0 solved, 7694 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 3969/11675 variables, and 113 constraints, problems are : Problem set: 0 solved, 7694 unsolved in 30117 ms.
Refiners :[Positive P Invariants (semi-flows): 113/125 constraints, State Equation: 0/3975 constraints, ReadFeed: 0/12 constraints, PredecessorRefiner: 7694/3850 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 7694 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/3969 variables, 113/113 constraints. Problems are: Problem set: 0 solved, 7694 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 3969/11675 variables, and 113 constraints, problems are : Problem set: 0 solved, 7694 unsolved in 30115 ms.
Refiners :[Positive P Invariants (semi-flows): 113/125 constraints, State Equation: 0/3975 constraints, ReadFeed: 0/12 constraints, PredecessorRefiner: 3844/3850 constraints, Known Traps: 0/0 constraints]
After SMT, in 137012ms problems are : Problem set: 0 solved, 7694 unsolved
Search for dead transitions found 0 dead transitions in 137086ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 145542 ms. Remains : 3975/3975 places, 7700/7700 transitions.
Successfully simplified 22 atomic propositions for a total of 15 simplifications.
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-06-07 16:05:14] [INFO ] Initial state reduction rules for CTL removed 3 formulas.
[2024-06-07 16:05:14] [INFO ] Flatten gal took : 292 ms
[2024-06-07 16:05:14] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-03 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-00 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-06-07 16:05:15] [INFO ] Flatten gal took : 288 ms
[2024-06-07 16:05:15] [INFO ] Input system was already deterministic with 7701 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Starting structural reductions in SI_CTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 1472 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1479 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:17] [INFO ] Flatten gal took : 276 ms
[2024-06-07 16:05:17] [INFO ] Flatten gal took : 323 ms
[2024-06-07 16:05:18] [INFO ] Input system was already deterministic with 7701 transitions.
Starting structural reductions in LTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 528 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 531 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:19] [INFO ] Flatten gal took : 266 ms
[2024-06-07 16:05:19] [INFO ] Flatten gal took : 288 ms
[2024-06-07 16:05:20] [INFO ] Input system was already deterministic with 7701 transitions.
Starting structural reductions in LTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 287 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 288 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:20] [INFO ] Flatten gal took : 264 ms
[2024-06-07 16:05:21] [INFO ] Flatten gal took : 292 ms
[2024-06-07 16:05:21] [INFO ] Input system was already deterministic with 7701 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 1488 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1491 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:23] [INFO ] Flatten gal took : 253 ms
[2024-06-07 16:05:23] [INFO ] Flatten gal took : 281 ms
[2024-06-07 16:05:24] [INFO ] Input system was already deterministic with 7701 transitions.
RANDOM walk for 32899 steps (7 resets) in 2691 ms. (12 steps per ms) remains 0/1 properties
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Starting structural reductions in SI_CTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 1371 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1374 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:27] [INFO ] Flatten gal took : 232 ms
[2024-06-07 16:05:27] [INFO ] Flatten gal took : 255 ms
[2024-06-07 16:05:27] [INFO ] Input system was already deterministic with 7701 transitions.
Starting structural reductions in LTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 281 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 284 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:28] [INFO ] Flatten gal took : 266 ms
[2024-06-07 16:05:28] [INFO ] Flatten gal took : 283 ms
[2024-06-07 16:05:29] [INFO ] Input system was already deterministic with 7701 transitions.
Starting structural reductions in LTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 274 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 277 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:29] [INFO ] Flatten gal took : 246 ms
[2024-06-07 16:05:30] [INFO ] Flatten gal took : 272 ms
[2024-06-07 16:05:30] [INFO ] Input system was already deterministic with 7701 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 1388 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1389 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:32] [INFO ] Flatten gal took : 231 ms
[2024-06-07 16:05:32] [INFO ] Flatten gal took : 256 ms
[2024-06-07 16:05:33] [INFO ] Input system was already deterministic with 7701 transitions.
RANDOM walk for 24164 steps (4 resets) in 2116 ms. (11 steps per ms) remains 0/1 properties
FORMULA BlocksWorld-PT-12-CTLCardinality-2024-14 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Starting structural reductions in SI_CTL mode, iteration 0 : 3975/3975 places, 7701/7701 transitions.
Applied a total of 0 rules in 1466 ms. Remains 3975 /3975 variables (removed 0) and now considering 7701/7701 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1469 ms. Remains : 3975/3975 places, 7701/7701 transitions.
[2024-06-07 16:05:35] [INFO ] Flatten gal took : 260 ms
[2024-06-07 16:05:36] [INFO ] Flatten gal took : 290 ms
[2024-06-07 16:05:36] [INFO ] Input system was already deterministic with 7701 transitions.
[2024-06-07 16:05:36] [INFO ] Flatten gal took : 268 ms
[2024-06-07 16:05:37] [INFO ] Flatten gal took : 274 ms
[2024-06-07 16:05:37] [INFO ] Export to MCC of 7 properties in file /home/mcc/execution/CTLCardinality.sr.xml took 4 ms.
[2024-06-07 16:05:37] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 3975 places, 7701 transitions and 38482 arcs took 39 ms.
Total runtime 536866 ms.
There are residual formulas that ITS could not solve within timeout
----------------------------------------------------------------------
GreatSPN-meddly tool, MCC 2023
----------------------------------------------------------------------

Running BlocksWorld-PT-12

IS_COLORED=
IS_NUPN=

LOADING PETRI NET FILE /home/mcc/execution/414/model.pnml (PNML) ...
PNML VERSION 2009, P/T NET.
COLOR CLASSES: 0
CONSTANTS: 0
PLACES: 3975
TRANSITIONS: 7701
COLOR VARS: 0
MEASURES: 0
LOADING TIME: [User 0.216s, Sys 0.012s]


SAVING FILE /home/mcc/execution/414/model (.net / .def) ...
EXPORT TIME: [User 0.024s, Sys 0.008s]


----------------------------------------------------------------------
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: 674
MODEL NAME: /home/mcc/execution/414/model
3975 places, 7701 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 CTLCardinality -timeout 360 -rebuildPNML

Sequence of Actions to be Executed by the VM

This is useful if one wants to reexecute the tool in the VM from the submitted image disk.

set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="BlocksWorld-PT-12"
export BK_EXAMINATION="CTLCardinality"
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 BlocksWorld-PT-12, examination is CTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r601-tall-171774424000249"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BlocksWorld-PT-12.tgz
mv BlocksWorld-PT-12 execution
cd execution
if [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "UpperBounds" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] || [ "CTLCardinality" = "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 [ "CTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLCardinality" != "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 "CTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLCardinality.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 '' CTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLCardinality"
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 ;