Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2026-input.r112-tall-177955701200567.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2026-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 2-5973
Executing tool gold2025
Input is DoubleExponent-PT-200, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r112-tall-177955701200567
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 4.0M
-rw-r--r-- 1 mcc users 7.7K Mar 6 16:56 CTLCardinality.txt
-rw-r--r-- 1 mcc users 83K Mar 6 16:56 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.2K Mar 6 16:56 CTLFireability.txt
-rw-r--r-- 1 mcc users 31K Mar 6 16:56 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Mar 3 18:30 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.8K Mar 17 09:02 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Mar 17 09:02 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Mar 17 09:02 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Mar 17 09:02 LTLFireability.xml
-rw-r--r-- 1 mcc users 17K Mar 6 16:56 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 180K Mar 6 16:56 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.6K Mar 6 16:56 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 61K Mar 6 16:56 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Mar 17 09:02 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Mar 17 09:02 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 3.5M Mar 3 18:30 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

FORMULA_NAME QuasiLiveness

=== Now, execution of the tool begins

BK_START 1779633278244

Invoking MCC driver with
GOLD_TOOL=
BK_EXAMINATION=QuasiLiveness
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=DoubleExponent-PT-200
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
QuasiLiveness PT
Running Version 202505121319
[2026-05-24 14:34:39] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, QuasiLiveness, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2026-05-24 14:34:39] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-24 14:34:40] [INFO ] Load time of PNML (sax parser for PT used): 327 ms
[2026-05-24 14:34:40] [INFO ] Transformed 10604 places.
[2026-05-24 14:34:40] [INFO ] Transformed 9998 transitions.
[2026-05-24 14:34:40] [INFO ] Parsed PT model containing 10604 places and 9998 transitions and 28194 arcs in 479 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 10604/10604 places, 9998/9998 transitions.
Reduce places removed 4 places and 0 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 2400 transitions
Trivial Post-agglo rules discarded 2400 transitions
Performed 2400 trivial Post agglomeration. Transition count delta: 2400
Iterating post reduction 0 with 2404 rules applied. Total rules applied 2404 place count 10600 transition count 7598
Reduce places removed 2400 places and 0 transitions.
Iterating post reduction 1 with 2400 rules applied. Total rules applied 4804 place count 8200 transition count 7598
Performed 400 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 400 Pre rules applied. Total rules applied 4804 place count 8200 transition count 7198
Deduced a syphon composed of 400 places in 816 ms
Reduce places removed 400 places and 0 transitions.
Iterating global reduction 2 with 800 rules applied. Total rules applied 5604 place count 7800 transition count 7198
Performed 1804 Post agglomeration using F-continuation condition.Transition count delta: 1804
Deduced a syphon composed of 1804 places in 298 ms
Reduce places removed 1804 places and 0 transitions.
Iterating global reduction 2 with 3608 rules applied. Total rules applied 9212 place count 5996 transition count 5394
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 101 places in 267 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 2 with 202 rules applied. Total rules applied 9414 place count 5895 transition count 5394
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 101 places in 254 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 2 with 202 rules applied. Total rules applied 9616 place count 5794 transition count 5394
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 101 places in 327 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 2 with 202 rules applied. Total rules applied 9818 place count 5693 transition count 5394
Performed 95 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 95 places in 215 ms
Reduce places removed 95 places and 0 transitions.
Iterating global reduction 2 with 190 rules applied. Total rules applied 10008 place count 5598 transition count 5394
Applied a total of 10008 rules in 3550 ms. Remains 5598 /10604 variables (removed 5006) and now considering 5394/9998 (removed 4604) transitions.
// Phase 1: matrix 5394 rows 5598 cols
[2026-05-24 14:34:43] [INFO ] Invariants computation overflowed in 185 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 14:34:47] [INFO ] Implicit Places using invariants in 3857 ms returned []
// Phase 1: matrix 5394 rows 5598 cols
[2026-05-24 14:34:47] [INFO ] Invariants computation overflowed in 132 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 14:34:51] [INFO ] State equation strengthened by 400 read => feed constraints.
[2026-05-24 14:37:27] [INFO ] Implicit Places using invariants and state equation in 160304 ms returned []
Implicit Place search using SMT with State Equation took 164193 ms to find 0 implicit places.
Running 5393 sub problems to find dead transitions.
// Phase 1: matrix 5394 rows 5598 cols
[2026-05-24 14:37:28] [INFO ] Invariants computation overflowed in 125 ms
[2026-05-24 14:37:28] [INFO ] State equation strengthened by 400 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5597/10992 variables, and 0 constraints, problems are : Problem set: 0 solved, 5393 unsolved in 30110 ms.
Refiners :[State Equation: 0/5598 constraints, ReadFeed: 0/400 constraints, PredecessorRefiner: 5393/5393 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 5393 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 5597/10992 variables, and 0 constraints, problems are : Problem set: 0 solved, 5393 unsolved in 30078 ms.
Refiners :[State Equation: 0/5598 constraints, ReadFeed: 0/400 constraints, PredecessorRefiner: 0/5393 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 63656ms problems are : Problem set: 0 solved, 5393 unsolved
Search for dead transitions found 0 dead transitions in 63721ms
Starting structural reductions in LIVENESS mode, iteration 1 : 5598/10604 places, 5394/9998 transitions.
Finished structural reductions in LIVENESS mode , in 1 iterations and 231511 ms. Remains : 5598/10604 places, 5394/9998 transitions.
Discarding 1198 transitions out of 5394. Remains 4196
Initial state reduction rules removed 1 formulas.
[2026-05-24 14:38:33] [INFO ] Flatten gal took : 564 ms
[2026-05-24 14:38:33] [INFO ] Flatten gal took : 441 ms
[2026-05-24 14:38:33] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality5122058717410741890.gal : 158 ms
[2026-05-24 14:38:33] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality13530703192786493123.prop : 33 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality5122058717410741890.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality13530703192786493123.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality13530703192786493123.prop.
RANDOM walk for 40000 steps (4869 resets) in 13117 ms. (3 steps per ms) remains 4170/4195 properties
BEST_FIRST walk for 124 steps (8 resets) in 41 ms. (2 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 39 ms. (3 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 49 ms. (2 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 106 ms. (1 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 47 ms. (2 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 28 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (9 resets) in 29 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 18 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 26 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 25 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 33 ms. (3 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 27 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 21 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 24 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 28 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 30 ms. (3 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 29 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 24 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 25 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 30 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 28 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 21 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 24 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 21 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (9 resets) in 26 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 24 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 29 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 25 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 33 ms. (3 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 121 steps (8 resets) in 22 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 31 ms. (3 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 34 ms. (3 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 22 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 29 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 121 steps (8 resets) in 24 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (9 resets) in 25 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 22 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 19 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 19 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 22 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 24 ms. (4 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 21 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 18 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 124 steps (8 resets) in 19 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 18 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 23 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 19 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 123 steps (8 resets) in 21 ms. (5 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 17 ms. (6 steps per ms) remains 4170/4170 properties
BEST_FIRST walk for 122 steps (8 resets) in 19 ms. (6 steps per ms) remains 4170/4170 properties
Probabilistic random walk after 30001 steps, saw 15005 distinct states, run finished after 6030 ms. (steps per millisecond=4 ) properties seen :24
// Phase 1: matrix 5394 rows 5598 cols
[2026-05-24 14:38:42] [INFO ] Invariants computation overflowed in 118 ms
[2026-05-24 14:38:42] [INFO ] State equation strengthened by 400 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5534/10992 variables, and 0 constraints, problems are : Problem set: 0 solved, 4146 unsolved in 5061 ms.
Refiners :[State Equation: 0/5598 constraints, ReadFeed: 0/400 constraints, PredecessorRefiner: 4146/4146 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 4146 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
Error getting values : (error "Error writing to Z3 solver: java.io.IOException: Broken pipe")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 5534/10992 variables, and 0 constraints, problems are : Problem set: 0 solved, 4146 unsolved in 5060 ms.
Refiners :[State Equation: 0/5598 constraints, ReadFeed: 0/400 constraints, PredecessorRefiner: 0/4146 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 12573ms problems are : Problem set: 0 solved, 4146 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 5534 out of 5598 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5598/5598 places, 5394/5394 transitions.
Free-agglomeration rule (complex) applied 5 times.
Iterating global reduction 0 with 5 rules applied. Total rules applied 5 place count 5598 transition count 5389
Reduce places removed 5 places and 0 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 10 place count 5593 transition count 5389
Partial Free-agglomeration rule applied 8 times.
Drop transitions (Partial Free agglomeration) removed 8 transitions
Iterating global reduction 1 with 8 rules applied. Total rules applied 18 place count 5593 transition count 5389
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 1 with 1 rules applied. Total rules applied 19 place count 5592 transition count 5388
Applied a total of 19 rules in 1092 ms. Remains 5592 /5598 variables (removed 6) and now considering 5388/5394 (removed 6) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1093 ms. Remains : 5592/5598 places, 5388/5394 transitions.
Reachability property qltransition_4148 is true.
Reachability property qltransition_2018 is true.
SDD proceeding with computation,4193 properties remain. new max is 2
SDD size :1 after 3
Reachability property qltransition_2980 is true.
Reachability property qltransition_2952 is true.
Reachability property qltransition_1008 is true.
Reachability property qltransition_374 is true.
RANDOM walk for 536800 steps (68720 resets) in 120004 ms. (4 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (341 resets) in 700 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (342 resets) in 560 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (327 resets) in 521 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (351 resets) in 610 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (349 resets) in 560 ms. (7 steps per ms) remains 4146/4146 properties
SDD proceeding with computation,4189 properties remain. new max is 2
SDD size :3 after 7
BEST_FIRST walk for 4003 steps (330 resets) in 613 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (334 resets) in 540 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (336 resets) in 594 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (338 resets) in 562 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (330 resets) in 735 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (337 resets) in 665 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (339 resets) in 563 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (339 resets) in 766 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (326 resets) in 536 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (335 resets) in 674 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (332 resets) in 787 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (326 resets) in 624 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (344 resets) in 644 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (350 resets) in 643 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (337 resets) in 513 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (346 resets) in 556 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (331 resets) in 558 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (344 resets) in 588 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (322 resets) in 603 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (341 resets) in 739 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (362 resets) in 583 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (333 resets) in 543 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (331 resets) in 546 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (335 resets) in 599 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (345 resets) in 681 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4004 steps (338 resets) in 546 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (329 resets) in 542 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (336 resets) in 531 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (317 resets) in 689 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (334 resets) in 547 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (325 resets) in 690 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (350 resets) in 615 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4000 steps (330 resets) in 639 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (363 resets) in 540 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4003 steps (327 resets) in 519 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (350 resets) in 545 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (342 resets) in 554 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (343 resets) in 734 ms. (5 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (349 resets) in 540 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (322 resets) in 541 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (352 resets) in 615 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (349 resets) in 654 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4002 steps (337 resets) in 634 ms. (6 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4003 steps (350 resets) in 548 ms. (7 steps per ms) remains 4146/4146 properties
BEST_FIRST walk for 4001 steps (340 resets) in 544 ms. (7 steps per ms) remains 4146/4146 properties
SDD proceeding with computation,4189 properties remain. new max is 4
SDD size :7 after 8
SDD proceeding with computation,4189 properties remain. new max is 8
SDD size :8 after 9
Reachability property qltransition_171 is true.
SDD proceeding with computation,4188 properties remain. new max is 8
SDD size :9 after 11
SDD proceeding with computation,4188 properties remain. new max is 16
SDD size :11 after 17
Reachability property qltransition_4350 is true.
Reachability property qltransition_3133 is true.
Reachability property qltransition_3105 is true.
Reachability property qltransition_1066 is true.
Reachability property qltransition_633 is true.
SDD proceeding with computation,4183 properties remain. new max is 16
SDD size :17 after 26
Reachability property qltransition_720 is true.
Reachability property qltransition_258 is true.
SDD proceeding with computation,4181 properties remain. new max is 16
SDD size :26 after 32
SDD proceeding with computation,4181 properties remain. new max is 32
SDD size :32 after 40
Reachability property qltransition_978 is true.
SDD proceeding with computation,4180 properties remain. new max is 32
SDD size :40 after 62
Reachability property qltransition_4940 is true.
Reachability property qltransition_3569 is true.
Reachability property qltransition_3547 is true.
Reachability property qltransition_2220 is true.
Reachability property qltransition_1586 is true.
Reachability property qltransition_1153 is true.
Reachability property qltransition_288 is true.
SDD proceeding with computation,4173 properties remain. new max is 32
SDD size :62 after 70
Reachability property qltransition_4146 is true.
Reachability property qltransition_2422 is true.
Reachability property qltransition_2278 is true.
SDD proceeding with computation,4170 properties remain. new max is 32
SDD size :70 after 81
Reachability property qltransition_1382 is true.
Interrupted probabilistic random walk after 657005 steps, run timeout after 120001 ms. (steps per millisecond=5 ) properties seen :7 out of 4146
Probabilistic random walk after 657005 steps, saw 328636 distinct states, run finished after 120006 ms. (steps per millisecond=5 ) properties seen :7
// Phase 1: matrix 5388 rows 5592 cols
[2026-05-24 14:41:37] [INFO ] Invariants computation overflowed in 125 ms
[2026-05-24 14:41:37] [INFO ] State equation strengthened by 402 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
SDD proceeding with computation,4169 properties remain. new max is 32
SDD size :81 after 102
Reachability property qltransition_4352 is true.
SDD proceeding with computation,4168 properties remain. new max is 32
SDD size :102 after 131
Reachability property qltransition_2509 is true.
SDD proceeding with computation,4167 properties remain. new max is 32
SDD size :131 after 138
SDD proceeding with computation,4167 properties remain. new max is 64
SDD size :138 after 153
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5525/10980 variables, and 0 constraints, problems are : Problem set: 0 solved, 4139 unsolved in 45063 ms.
Refiners :[State Equation: 0/5592 constraints, ReadFeed: 0/402 constraints, PredecessorRefiner: 4139/4139 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 4139 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
SDD proceeding with computation,4167 properties remain. new max is 128
SDD size :153 after 190
SDD proceeding with computation,4167 properties remain. new max is 256
SDD size :190 after 401
Reachability property qltransition_5136 is true.
Reachability property qltransition_3722 is true.
Reachability property qltransition_3697 is true.
Reachability property qltransition_2538 is true.
Reachability property qltransition_1931 is true.
Reachability property qltransition_1844 is true.
Reachability property qltransition_1469 is true.
SDD proceeding with computation,4160 properties remain. new max is 256
SDD size :401 after 834
SDD proceeding with computation,4160 properties remain. new max is 512
SDD size :834 after 1380
Reachability property qltransition_5134 is true.
Reachability property qltransition_4938 is true.
Reachability property qltransition_3922 is true.
Reachability property qltransition_2707 is true.
Reachability property qltransition_2706 is true.
Reachability property qltransition_2190 is true.
Reachability property qltransition_1499 is true.
Reachability property qltransition_133 is true.
Reachability property qltransition_124 is true.
Reachability property qltransition_110 is true.
Reachability property qltransition_104 is true.
Reachability property qltransition_43 is true.
Reachability property qltransition_21 is true.
Reachability property qltransition_0 is true.
SDD proceeding with computation,4146 properties remain. new max is 512
SDD size :1380 after 3983
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 5525/10980 variables, and 0 constraints, problems are : Problem set: 0 solved, 4139 unsolved in 45064 ms.
Refiners :[State Equation: 0/5592 constraints, ReadFeed: 0/402 constraints, PredecessorRefiner: 0/4139 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 92258ms problems are : Problem set: 0 solved, 4139 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 5525 out of 5592 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5592/5592 places, 5388/5388 transitions.
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 5592 transition count 5387
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 2 place count 5591 transition count 5387
Partial Free-agglomeration rule applied 4 times.
Drop transitions (Partial Free agglomeration) removed 4 transitions
Iterating global reduction 1 with 4 rules applied. Total rules applied 6 place count 5591 transition count 5387
Applied a total of 6 rules in 704 ms. Remains 5591 /5592 variables (removed 1) and now considering 5387/5388 (removed 1) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 704 ms. Remains : 5591/5592 places, 5387/5388 transitions.
SDD proceeding with computation,4146 properties remain. new max is 1024
SDD size :3983 after 18250
Reachability property qltransition_3942 is true.
Reachability property qltransition_2725 is true.
Reachability property qltransition_2721 is true.
Reachability property qltransition_136 is true.
Reachability property qltransition_76 is true.
Reachability property qltransition_67 is true.
Reachability property qltransition_30 is true.
SDD proceeding with computation,4139 properties remain. new max is 1024
SDD size :18250 after 70244
RANDOM walk for 569071 steps (72982 resets) in 120004 ms. (4 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (320 resets) in 539 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (328 resets) in 542 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (337 resets) in 561 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (340 resets) in 791 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (351 resets) in 551 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (342 resets) in 627 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (358 resets) in 752 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (315 resets) in 635 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4000 steps (349 resets) in 541 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (337 resets) in 571 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4000 steps (339 resets) in 758 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (319 resets) in 622 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (320 resets) in 529 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4000 steps (346 resets) in 593 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (322 resets) in 744 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (326 resets) in 510 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (327 resets) in 537 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (316 resets) in 608 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (334 resets) in 567 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (324 resets) in 554 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (339 resets) in 750 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (335 resets) in 546 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (335 resets) in 553 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (323 resets) in 536 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (340 resets) in 724 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (340 resets) in 550 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (343 resets) in 672 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (339 resets) in 564 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (345 resets) in 689 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (334 resets) in 616 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (329 resets) in 621 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (344 resets) in 716 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (344 resets) in 572 ms. (6 steps per ms) remains 4139/4139 properties
SDD proceeding with computation,4139 properties remain. new max is 2048
SDD size :70244 after 125113
BEST_FIRST walk for 4001 steps (335 resets) in 699 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (348 resets) in 603 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (326 resets) in 752 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (332 resets) in 537 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (337 resets) in 698 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (336 resets) in 544 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (340 resets) in 716 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (344 resets) in 533 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (335 resets) in 530 ms. (7 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (344 resets) in 578 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (343 resets) in 593 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4002 steps (328 resets) in 591 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (315 resets) in 598 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (340 resets) in 596 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (329 resets) in 635 ms. (6 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4003 steps (347 resets) in 694 ms. (5 steps per ms) remains 4139/4139 properties
BEST_FIRST walk for 4001 steps (339 resets) in 534 ms. (7 steps per ms) remains 4139/4139 properties
SDD proceeding with computation,4139 properties remain. new max is 4096
SDD size :125113 after 165778
SDD proceeding with computation,4139 properties remain. new max is 8192
SDD size :165778 after 371919
SDD proceeding with computation,4139 properties remain. new max is 16384
SDD size :371919 after 790404
Reachability property qltransition_4010 is true.
Reachability property qltransition_3944 is true.
Reachability property qltransition_3924 is true.
Reachability property qltransition_2773 is true.
Reachability property qltransition_2772 is true.
Reachability property qltransition_278 is true.
Reachability property qltransition_269 is true.
Reachability property qltransition_254 is true.
Reachability property qltransition_248 is true.
Reachability property qltransition_187 is true.
Reachability property qltransition_164 is true.
Reachability property qltransition_143 is true.
Reachability property qltransition_100 is true.
Reachability property qltransition_34 is true.
SDD proceeding with computation,4125 properties remain. new max is 16384
SDD size :790404 after 3.6056e+07
SDD proceeding with computation,4125 properties remain. new max is 32768
SDD size :3.6056e+07 after 2.4249e+08
SDD proceeding with computation,4125 properties remain. new max is 65536
SDD size :2.4249e+08 after 9.79168e+08
SDD proceeding with computation,4125 properties remain. new max is 131072
SDD size :9.79168e+08 after 3.30917e+09
Interrupted probabilistic random walk after 658073 steps, run timeout after 120001 ms. (steps per millisecond=5 ) properties seen :0 out of 4139
Probabilistic random walk after 658073 steps, saw 329265 distinct states, run finished after 120002 ms. (steps per millisecond=5 ) properties seen :0
// Phase 1: matrix 5387 rows 5591 cols
[2026-05-24 14:45:51] [INFO ] Invariants computation overflowed in 126 ms
[2026-05-24 14:45:51] [INFO ] State equation strengthened by 404 read => feed constraints.
Starting Z3 with timeout 75.0 s and query timeout 7500.0 ms
SDD proceeding with computation,4125 properties remain. new max is 262144
SDD size :3.30917e+09 after 1.04085e+10
Reachability property qltransition_4030 is true.
Reachability property qltransition_2791 is true.
Reachability property qltransition_2787 is true.
Reachability property qltransition_281 is true.
Reachability property qltransition_220 is true.
Reachability property qltransition_211 is true.
Reachability property qltransition_174 is true.
SDD proceeding with computation,4118 properties remain. new max is 262144
SDD size :1.04085e+10 after 1.99088e+10
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5506/10978 variables, and 0 constraints, problems are : Problem set: 7 solved, 4118 unsolved in 75068 ms.
Refiners :[State Equation: 0/5591 constraints, ReadFeed: 0/404 constraints, PredecessorRefiner: 4125/4125 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 7 solved, 4118 unsolved
Starting Z3 with timeout 75.0 s and query timeout 7500.0 ms
SDD proceeding with computation,4118 properties remain. new max is 524288
SDD size :1.99088e+10 after 3.33869e+10
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 5497/10978 variables, and 0 constraints, problems are : Problem set: 7 solved, 4118 unsolved in 75059 ms.
Refiners :[State Equation: 0/5591 constraints, ReadFeed: 0/404 constraints, PredecessorRefiner: 0/4125 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 152184ms problems are : Problem set: 7 solved, 4118 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 5497 out of 5591 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5591/5591 places, 5387/5387 transitions.
Free-agglomeration rule (complex) applied 4 times.
Iterating global reduction 0 with 4 rules applied. Total rules applied 4 place count 5591 transition count 5383
Reduce places removed 4 places and 0 transitions.
Iterating post reduction 0 with 4 rules applied. Total rules applied 8 place count 5587 transition count 5383
Partial Free-agglomeration rule applied 5 times.
Drop transitions (Partial Free agglomeration) removed 5 transitions
Iterating global reduction 1 with 5 rules applied. Total rules applied 13 place count 5587 transition count 5383
Applied a total of 13 rules in 707 ms. Remains 5587 /5591 variables (removed 4) and now considering 5383/5387 (removed 4) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 707 ms. Remains : 5587/5591 places, 5383/5387 transitions.
SDD proceeding with computation,4118 properties remain. new max is 1048576
SDD size :3.33869e+10 after 5.85861e+10
Detected timeout of ITS tools.
[2026-05-24 14:48:34] [INFO ] Flatten gal took : 464 ms
[2026-05-24 14:48:34] [INFO ] Applying decomposition
[2026-05-24 14:48:35] [INFO ] Flatten gal took : 339 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph8858716987905395597.txt' '-o' '/tmp/graph8858716987905395597.bin' '-w' '/tmp/graph8858716987905395597.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph8858716987905395597.bin' '-l' '-1' '-v' '-w' '/tmp/graph8858716987905395597.weights' '-q' '0' '-e' '0.001'
[2026-05-24 14:48:36] [INFO ] Decomposing Gal with order
[2026-05-24 14:48:37] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-24 14:48:39] [INFO ] Removed a total of 4146 redundant transitions.
[2026-05-24 14:48:39] [INFO ] Flatten gal took : 812 ms
[2026-05-24 14:48:42] [INFO ] Fuse similar labels procedure discarded/fused a total of 256 labels/synchronizations in 368 ms.
[2026-05-24 14:48:43] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality17934566835225533.gal : 129 ms
[2026-05-24 14:48:43] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality2438124362360339659.prop : 39 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality17934566835225533.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality2438124362360339659.prop' '--nowitness'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...305
Loading property file /tmp/ReachabilityCardinality2438124362360339659.prop.
SDD proceeding with computation,4118 properties remain. new max is 4
SDD size :1 after 7
SDD proceeding with computation,4118 properties remain. new max is 8
SDD size :7 after 75
SDD proceeding with computation,4118 properties remain. new max is 16
SDD size :75 after 784
SDD proceeding with computation,4118 properties remain. new max is 32
SDD size :784 after 51581
RANDOM walk for 525686 steps (67310 resets) in 120005 ms. (4 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (335 resets) in 583 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (321 resets) in 754 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (345 resets) in 534 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (324 resets) in 548 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (344 resets) in 734 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (330 resets) in 537 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (338 resets) in 788 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (310 resets) in 546 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (341 resets) in 621 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (333 resets) in 763 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (332 resets) in 695 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (325 resets) in 693 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (333 resets) in 518 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (322 resets) in 629 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (346 resets) in 604 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (339 resets) in 537 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (333 resets) in 526 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (329 resets) in 544 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (344 resets) in 538 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (351 resets) in 540 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (341 resets) in 534 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (329 resets) in 749 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (356 resets) in 541 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (337 resets) in 543 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (348 resets) in 726 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (347 resets) in 673 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (332 resets) in 585 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (337 resets) in 683 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (326 resets) in 534 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (334 resets) in 768 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (352 resets) in 541 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (328 resets) in 521 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (349 resets) in 541 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (325 resets) in 528 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4004 steps (346 resets) in 538 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (354 resets) in 569 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (339 resets) in 723 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (343 resets) in 542 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (333 resets) in 562 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (308 resets) in 632 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (354 resets) in 519 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (358 resets) in 762 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (339 resets) in 579 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (349 resets) in 740 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (330 resets) in 583 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (343 resets) in 782 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (336 resets) in 785 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (341 resets) in 783 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (347 resets) in 572 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (341 resets) in 695 ms. (5 steps per ms) remains 4118/4118 properties
SDD proceeding with computation,4118 properties remain. new max is 64
SDD size :51581 after 1.1535e+06
SDD proceeding with computation,4118 properties remain. new max is 128
SDD size :1.1535e+06 after 1.154e+06
SDD proceeding with computation,4118 properties remain. new max is 256
SDD size :1.154e+06 after 1.15656e+06
SDD proceeding with computation,4118 properties remain. new max is 512
SDD size :1.15656e+06 after 1.16777e+06
Interrupted probabilistic random walk after 608376 steps, run timeout after 123001 ms. (steps per millisecond=4 ) properties seen :0 out of 4118
Probabilistic random walk after 608376 steps, saw 304376 distinct states, run finished after 123001 ms. (steps per millisecond=4 ) properties seen :0
// Phase 1: matrix 5383 rows 5587 cols
[2026-05-24 14:51:08] [INFO ] Invariants computation overflowed in 116 ms
[2026-05-24 14:51:08] [INFO ] State equation strengthened by 406 read => feed constraints.
Starting Z3 with timeout 90.0 s and query timeout 9000.0 ms
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5497/10970 variables, and 0 constraints, problems are : Problem set: 0 solved, 4118 unsolved in 90061 ms.
Refiners :[State Equation: 0/5587 constraints, ReadFeed: 0/406 constraints, PredecessorRefiner: 4118/4118 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 4118 unsolved
Starting Z3 with timeout 90.0 s and query timeout 9000.0 ms
SDD proceeding with computation,4118 properties remain. new max is 1024
SDD size :1.16777e+06 after 1.21331e+06
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 5497/10970 variables, and 0 constraints, problems are : Problem set: 0 solved, 4118 unsolved in 90088 ms.
Refiners :[State Equation: 0/5587 constraints, ReadFeed: 0/406 constraints, PredecessorRefiner: 0/4118 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 182434ms problems are : Problem set: 0 solved, 4118 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 5497 out of 5587 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5587/5587 places, 5383/5383 transitions.
Applied a total of 0 rules in 223 ms. Remains 5587 /5587 variables (removed 0) and now considering 5383/5383 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 223 ms. Remains : 5587/5587 places, 5383/5383 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5587/5587 places, 5383/5383 transitions.
Applied a total of 0 rules in 220 ms. Remains 5587 /5587 variables (removed 0) and now considering 5383/5383 (removed 0) transitions.
// Phase 1: matrix 5383 rows 5587 cols
[2026-05-24 14:54:11] [INFO ] Invariants computation overflowed in 127 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 14:54:12] [INFO ] Implicit Places using invariants in 762 ms returned []
// Phase 1: matrix 5383 rows 5587 cols
[2026-05-24 14:54:12] [INFO ] Invariants computation overflowed in 107 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 14:54:15] [INFO ] State equation strengthened by 406 read => feed constraints.
[2026-05-24 14:54:45] [INFO ] Implicit Places using invariants and state equation in 32733 ms returned [529, 599, 1836, 2539, 4591, 5297]
[2026-05-24 14:54:45] [INFO ] Actually due to overlaps returned [2539, 1836]
Discarding 2 places :
Implicit Place search using SMT with State Equation took 33515 ms to find 2 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 5585/5587 places, 5383/5383 transitions.
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 5585 transition count 5382
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 2 place count 5584 transition count 5382
Applied a total of 2 rules in 461 ms. Remains 5584 /5585 variables (removed 1) and now considering 5382/5383 (removed 1) transitions.
// Phase 1: matrix 5382 rows 5584 cols
[2026-05-24 14:54:45] [INFO ] Invariants computation overflowed in 98 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 14:54:46] [INFO ] Implicit Places using invariants in 636 ms returned []
// Phase 1: matrix 5382 rows 5584 cols
[2026-05-24 14:54:46] [INFO ] Invariants computation overflowed in 97 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 14:54:49] [INFO ] State equation strengthened by 406 read => feed constraints.
[2026-05-24 14:55:26] [INFO ] Performed 238/5584 implicitness test of which 0 returned IMPLICIT in 36 seconds.
[2026-05-24 14:55:59] [INFO ] Performed 351/5584 implicitness test of which 0 returned IMPLICIT in 69 seconds.
[2026-05-24 14:57:26] [INFO ] Implicit Places using invariants and state equation in 160242 ms returned []
Implicit Place search using SMT with State Equation took 160880 ms to find 0 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 2 : 5584/5587 places, 5382/5383 transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 195077 ms. Remains : 5584/5587 places, 5382/5383 transitions.
RANDOM walk for 572253 steps (82366 resets) in 120004 ms. (4 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (349 resets) in 511 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (367 resets) in 512 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (335 resets) in 510 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (371 resets) in 555 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4004 steps (357 resets) in 722 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (365 resets) in 518 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (359 resets) in 505 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (352 resets) in 516 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (374 resets) in 510 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (359 resets) in 511 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (375 resets) in 551 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (353 resets) in 516 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (400 resets) in 526 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (370 resets) in 734 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (361 resets) in 525 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (367 resets) in 508 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (365 resets) in 515 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (365 resets) in 554 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (362 resets) in 755 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (359 resets) in 760 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (367 resets) in 757 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (372 resets) in 560 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (393 resets) in 764 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4000 steps (352 resets) in 521 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (395 resets) in 509 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (380 resets) in 571 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (384 resets) in 567 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (342 resets) in 605 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (374 resets) in 590 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (364 resets) in 553 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (370 resets) in 718 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (354 resets) in 524 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (373 resets) in 761 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (365 resets) in 537 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (379 resets) in 554 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (364 resets) in 744 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (371 resets) in 627 ms. (6 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4004 steps (349 resets) in 684 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (372 resets) in 726 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (367 resets) in 509 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (346 resets) in 727 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (361 resets) in 526 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (368 resets) in 520 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (366 resets) in 549 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (373 resets) in 769 ms. (5 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (365 resets) in 518 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (377 resets) in 523 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4002 steps (366 resets) in 506 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4003 steps (390 resets) in 526 ms. (7 steps per ms) remains 4118/4118 properties
BEST_FIRST walk for 4001 steps (372 resets) in 562 ms. (7 steps per ms) remains 4118/4118 properties
Detected timeout of ITS tools.
Interrupted probabilistic random walk after 640343 steps, run timeout after 120001 ms. (steps per millisecond=5 ) properties seen :0 out of 4118
Probabilistic random walk after 640343 steps, saw 320364 distinct states, run finished after 120001 ms. (steps per millisecond=5 ) properties seen :0
// Phase 1: matrix 5382 rows 5584 cols
[2026-05-24 15:00:07] [INFO ] Invariants computation overflowed in 95 ms
[2026-05-24 15:00:07] [INFO ] State equation strengthened by 406 read => feed constraints.
Starting Z3 with timeout 105.0 s and query timeout 10500.0 ms
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 5497/10966 variables, and 0 constraints, problems are : Problem set: 0 solved, 4118 unsolved in 105052 ms.
Refiners :[State Equation: 0/5584 constraints, ReadFeed: 0/406 constraints, PredecessorRefiner: 4118/4118 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 4118 unsolved
Starting Z3 with timeout 105.0 s and query timeout 10500.0 ms
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 5497/10966 variables, and 0 constraints, problems are : Problem set: 0 solved, 4118 unsolved in 105065 ms.
Refiners :[State Equation: 0/5584 constraints, ReadFeed: 0/406 constraints, PredecessorRefiner: 0/4118 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 212109ms problems are : Problem set: 0 solved, 4118 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 5497 out of 5584 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5584/5584 places, 5382/5382 transitions.
Applied a total of 0 rules in 224 ms. Remains 5584 /5584 variables (removed 0) and now considering 5382/5382 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 224 ms. Remains : 5584/5584 places, 5382/5382 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5584/5584 places, 5382/5382 transitions.
Applied a total of 0 rules in 200 ms. Remains 5584 /5584 variables (removed 0) and now considering 5382/5382 (removed 0) transitions.
// Phase 1: matrix 5382 rows 5584 cols
[2026-05-24 15:03:40] [INFO ] Invariants computation overflowed in 86 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 15:03:40] [INFO ] Implicit Places using invariants in 696 ms returned []
// Phase 1: matrix 5382 rows 5584 cols
[2026-05-24 15:03:40] [INFO ] Invariants computation overflowed in 97 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-24 15:03:44] [INFO ] State equation strengthened by 406 read => feed constraints.
[2026-05-24 15:04:17] [INFO ] Performed 238/5584 implicitness test of which 0 returned IMPLICIT in 33 seconds.

BK_TIME_CONFINEMENT_REACHED

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ QuasiLiveness = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800

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="DoubleExponent-PT-200"
export BK_EXAMINATION="QuasiLiveness"
export BK_TOOL="gold2025"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
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 2-5973"
echo " Executing tool gold2025"
echo " Input is DoubleExponent-PT-200, examination is QuasiLiveness"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r112-tall-177955701200567"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DoubleExponent-PT-200.tgz
mv DoubleExponent-PT-200 execution
cd execution
if [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "UpperBounds" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] || [ "QuasiLiveness" = "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 [ "QuasiLiveness" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "QuasiLiveness" != "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 "QuasiLiveness.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 '' QuasiLiveness.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] ; then
echo "FORMULA_NAME QuasiLiveness"
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 ;