Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2023-input.r394-oct2-167903718100602.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 backing_fmt=qcow2 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
.......................
=====================================================================
Generated by BenchKit 2-5348
Executing tool marciexred
Input is ShieldPPPt-PT-005B, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r394-oct2-167903718100602
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 472K
-rw-r--r-- 1 mcc users 6.4K Feb 25 20:51 CTLCardinality.txt
-rw-r--r-- 1 mcc users 69K Feb 25 20:51 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.5K Feb 25 20:50 CTLFireability.txt
-rw-r--r-- 1 mcc users 52K Feb 25 20:50 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.6K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.4K Feb 25 17:00 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 25 17:00 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Feb 25 17:00 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 17:00 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.3K Feb 25 20:51 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 83K Feb 25 20:51 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.0K Feb 25 20:51 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 46K Feb 25 20:51 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:00 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 17:00 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 92K Mar 5 18:23 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 ShieldPPPt-PT-005B-CTLFireability-00
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-01
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-02
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-03
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-04
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-05
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-06
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-07
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-08
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-09
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-10
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-11
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-12
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-13
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-14
FORMULA_NAME ShieldPPPt-PT-005B-CTLFireability-15

=== Now, execution of the tool begins

BK_START 1679524547432

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=marciexred
BK_EXAMINATION=CTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=ShieldPPPt-PT-005B
Applying reductions before tool marcie
Invoking reducer
Running Version 202303021504
[2023-03-22 22:35:49] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLFireability, -timeout, 360, -rebuildPNML]
[2023-03-22 22:35:49] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-22 22:35:49] [INFO ] Load time of PNML (sax parser for PT used): 80 ms
[2023-03-22 22:35:49] [INFO ] Transformed 393 places.
[2023-03-22 22:35:49] [INFO ] Transformed 358 transitions.
[2023-03-22 22:35:49] [INFO ] Found NUPN structural information;
[2023-03-22 22:35:49] [INFO ] Parsed PT model containing 393 places and 358 transitions and 896 arcs in 161 ms.
Parsed 16 properties from file /home/mcc/execution/CTLFireability.xml in 9 ms.
Support contains 129 out of 393 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 393/393 places, 358/358 transitions.
Discarding 31 places :
Symmetric choice reduction at 0 with 31 rule applications. Total rules 31 place count 362 transition count 327
Iterating global reduction 0 with 31 rules applied. Total rules applied 62 place count 362 transition count 327
Applied a total of 62 rules in 47 ms. Remains 362 /393 variables (removed 31) and now considering 327/358 (removed 31) transitions.
// Phase 1: matrix 327 rows 362 cols
[2023-03-22 22:35:49] [INFO ] Computed 56 place invariants in 11 ms
[2023-03-22 22:35:50] [INFO ] Implicit Places using invariants in 293 ms returned []
[2023-03-22 22:35:50] [INFO ] Invariant cache hit.
[2023-03-22 22:35:50] [INFO ] Implicit Places using invariants and state equation in 364 ms returned []
Implicit Place search using SMT with State Equation took 686 ms to find 0 implicit places.
[2023-03-22 22:35:50] [INFO ] Invariant cache hit.
[2023-03-22 22:35:50] [INFO ] Dead Transitions using invariants and state equation in 304 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 362/393 places, 327/358 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1039 ms. Remains : 362/393 places, 327/358 transitions.
Support contains 129 out of 362 places after structural reductions.
[2023-03-22 22:35:51] [INFO ] Flatten gal took : 68 ms
[2023-03-22 22:35:51] [INFO ] Flatten gal took : 19 ms
[2023-03-22 22:35:51] [INFO ] Input system was already deterministic with 327 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 324 ms. (steps per millisecond=30 ) properties (out of 90) seen :88
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 21 ms. (steps per millisecond=476 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 12 ms. (steps per millisecond=833 ) properties (out of 2) seen :1
Running SMT prover for 1 properties.
[2023-03-22 22:35:51] [INFO ] Invariant cache hit.
[2023-03-22 22:35:51] [INFO ] [Real]Absence check using 56 positive place invariants in 22 ms returned sat
[2023-03-22 22:35:51] [INFO ] After 198ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-03-22 22:35:51] [INFO ] [Nat]Absence check using 56 positive place invariants in 24 ms returned sat
[2023-03-22 22:35:52] [INFO ] After 147ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 18 places in 65 ms of which 3 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 21 places in 82 ms of which 1 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 28 places in 50 ms of which 2 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 21 places in 47 ms of which 0 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 20 places in 55 ms of which 5 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 24 places in 39 ms of which 1 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Deduced a trap composed of 16 places in 47 ms of which 1 ms to minimize.
[2023-03-22 22:35:52] [INFO ] Trap strengthening (SAT) tested/added 8/7 trap constraints in 475 ms
[2023-03-22 22:35:52] [INFO ] After 641ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 13 ms.
[2023-03-22 22:35:52] [INFO ] After 794ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Parikh walk visited 0 properties in 3 ms.
Support contains 4 out of 362 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 362/362 places, 327/327 transitions.
Drop transitions removed 75 transitions
Trivial Post-agglo rules discarded 75 transitions
Performed 75 trivial Post agglomeration. Transition count delta: 75
Iterating post reduction 0 with 75 rules applied. Total rules applied 75 place count 362 transition count 252
Reduce places removed 75 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 1 with 77 rules applied. Total rules applied 152 place count 287 transition count 250
Reduce places removed 1 places and 0 transitions.
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Iterating post reduction 2 with 4 rules applied. Total rules applied 156 place count 286 transition count 247
Reduce places removed 3 places and 0 transitions.
Iterating post reduction 3 with 3 rules applied. Total rules applied 159 place count 283 transition count 247
Performed 28 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 28 Pre rules applied. Total rules applied 159 place count 283 transition count 219
Deduced a syphon composed of 28 places in 1 ms
Reduce places removed 28 places and 0 transitions.
Iterating global reduction 4 with 56 rules applied. Total rules applied 215 place count 255 transition count 219
Discarding 19 places :
Symmetric choice reduction at 4 with 19 rule applications. Total rules 234 place count 236 transition count 200
Iterating global reduction 4 with 19 rules applied. Total rules applied 253 place count 236 transition count 200
Performed 13 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 13 Pre rules applied. Total rules applied 253 place count 236 transition count 187
Deduced a syphon composed of 13 places in 0 ms
Reduce places removed 13 places and 0 transitions.
Iterating global reduction 4 with 26 rules applied. Total rules applied 279 place count 223 transition count 187
Performed 77 Post agglomeration using F-continuation condition.Transition count delta: 77
Deduced a syphon composed of 77 places in 0 ms
Reduce places removed 77 places and 0 transitions.
Iterating global reduction 4 with 154 rules applied. Total rules applied 433 place count 146 transition count 110
Performed 12 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 12 places in 0 ms
Reduce places removed 12 places and 0 transitions.
Iterating global reduction 4 with 24 rules applied. Total rules applied 457 place count 134 transition count 110
Partial Free-agglomeration rule applied 14 times.
Drop transitions removed 14 transitions
Iterating global reduction 4 with 14 rules applied. Total rules applied 471 place count 134 transition count 110
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 4 with 1 rules applied. Total rules applied 472 place count 133 transition count 109
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 4 with 1 rules applied. Total rules applied 473 place count 132 transition count 109
Performed 2 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 5 with 2 Pre rules applied. Total rules applied 473 place count 132 transition count 107
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 5 with 4 rules applied. Total rules applied 477 place count 130 transition count 107
Applied a total of 477 rules in 82 ms. Remains 130 /362 variables (removed 232) and now considering 107/327 (removed 220) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 82 ms. Remains : 130/362 places, 107/327 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 51 ms. (steps per millisecond=196 ) properties (out of 1) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 13 ms. (steps per millisecond=769 ) properties (out of 1) seen :0
Interrupted probabilistic random walk after 1036038 steps, run timeout after 3001 ms. (steps per millisecond=345 ) properties seen :{}
Probabilistic random walk after 1036038 steps, saw 700785 distinct states, run finished after 3004 ms. (steps per millisecond=344 ) properties seen :0
Running SMT prover for 1 properties.
// Phase 1: matrix 107 rows 130 cols
[2023-03-22 22:35:55] [INFO ] Computed 55 place invariants in 1 ms
[2023-03-22 22:35:55] [INFO ] [Real]Absence check using 55 positive place invariants in 13 ms returned sat
[2023-03-22 22:35:55] [INFO ] After 112ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-03-22 22:35:55] [INFO ] [Nat]Absence check using 55 positive place invariants in 8 ms returned sat
[2023-03-22 22:35:55] [INFO ] After 34ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-03-22 22:35:55] [INFO ] State equation strengthened by 4 read => feed constraints.
[2023-03-22 22:35:55] [INFO ] After 9ms SMT Verify possible using 4 Read/Feed constraints in natural domain returned unsat :0 sat :1
[2023-03-22 22:35:55] [INFO ] Deduced a trap composed of 6 places in 41 ms of which 0 ms to minimize.
[2023-03-22 22:35:55] [INFO ] Deduced a trap composed of 5 places in 25 ms of which 1 ms to minimize.
[2023-03-22 22:35:55] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 103 ms
[2023-03-22 22:35:55] [INFO ] After 120ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 5 ms.
[2023-03-22 22:35:56] [INFO ] After 205ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Parikh walk visited 0 properties in 1 ms.
Support contains 4 out of 130 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 130/130 places, 107/107 transitions.
Applied a total of 0 rules in 2 ms. Remains 130 /130 variables (removed 0) and now considering 107/107 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 2 ms. Remains : 130/130 places, 107/107 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 130/130 places, 107/107 transitions.
Applied a total of 0 rules in 3 ms. Remains 130 /130 variables (removed 0) and now considering 107/107 (removed 0) transitions.
[2023-03-22 22:35:56] [INFO ] Invariant cache hit.
[2023-03-22 22:35:56] [INFO ] Implicit Places using invariants in 112 ms returned [113, 117]
Discarding 2 places :
Implicit Place search using SMT only with invariants took 114 ms to find 2 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 128/130 places, 107/107 transitions.
Discarding 2 places :
Symmetric choice reduction at 0 with 2 rule applications. Total rules 2 place count 126 transition count 105
Iterating global reduction 0 with 2 rules applied. Total rules applied 4 place count 126 transition count 105
Applied a total of 4 rules in 4 ms. Remains 126 /128 variables (removed 2) and now considering 105/107 (removed 2) transitions.
// Phase 1: matrix 105 rows 126 cols
[2023-03-22 22:35:56] [INFO ] Computed 53 place invariants in 1 ms
[2023-03-22 22:35:56] [INFO ] Implicit Places using invariants in 80 ms returned []
[2023-03-22 22:35:56] [INFO ] Invariant cache hit.
[2023-03-22 22:35:56] [INFO ] State equation strengthened by 2 read => feed constraints.
[2023-03-22 22:35:56] [INFO ] Implicit Places using invariants and state equation in 117 ms returned []
Implicit Place search using SMT with State Equation took 213 ms to find 0 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 2 : 126/130 places, 105/107 transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 334 ms. Remains : 126/130 places, 105/107 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 29 ms. (steps per millisecond=344 ) properties (out of 1) seen :0
Finished Best-First random walk after 8001 steps, including 2 resets, run visited all 1 properties in 11 ms. (steps per millisecond=727 )
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 23 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 28 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 327 transitions.
Computed a total of 90 stabilizing places and 90 stable transitions
Starting structural reductions in SI_CTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Reduce places removed 1 places and 1 transitions.
Drop transitions removed 76 transitions
Trivial Post-agglo rules discarded 76 transitions
Performed 76 trivial Post agglomeration. Transition count delta: 76
Iterating post reduction 0 with 76 rules applied. Total rules applied 76 place count 361 transition count 250
Reduce places removed 76 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 1 with 78 rules applied. Total rules applied 154 place count 285 transition count 248
Reduce places removed 1 places and 0 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 2 with 2 rules applied. Total rules applied 156 place count 284 transition count 247
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 157 place count 283 transition count 247
Performed 30 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 30 Pre rules applied. Total rules applied 157 place count 283 transition count 217
Deduced a syphon composed of 30 places in 1 ms
Reduce places removed 30 places and 0 transitions.
Iterating global reduction 4 with 60 rules applied. Total rules applied 217 place count 253 transition count 217
Discarding 19 places :
Symmetric choice reduction at 4 with 19 rule applications. Total rules 236 place count 234 transition count 198
Iterating global reduction 4 with 19 rules applied. Total rules applied 255 place count 234 transition count 198
Performed 13 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 13 Pre rules applied. Total rules applied 255 place count 234 transition count 185
Deduced a syphon composed of 13 places in 1 ms
Reduce places removed 13 places and 0 transitions.
Iterating global reduction 4 with 26 rules applied. Total rules applied 281 place count 221 transition count 185
Performed 71 Post agglomeration using F-continuation condition.Transition count delta: 71
Deduced a syphon composed of 71 places in 0 ms
Reduce places removed 71 places and 0 transitions.
Iterating global reduction 4 with 142 rules applied. Total rules applied 423 place count 150 transition count 114
Partial Post-agglomeration rule applied 2 times.
Drop transitions removed 2 transitions
Iterating global reduction 4 with 2 rules applied. Total rules applied 425 place count 150 transition count 114
Reduce places removed 2 places and 2 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 427 place count 148 transition count 112
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 4 with 1 rules applied. Total rules applied 428 place count 147 transition count 112
Performed 2 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 5 with 2 Pre rules applied. Total rules applied 428 place count 147 transition count 110
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 5 with 4 rules applied. Total rules applied 432 place count 145 transition count 110
Applied a total of 432 rules in 38 ms. Remains 145 /362 variables (removed 217) and now considering 110/327 (removed 217) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 38 ms. Remains : 145/362 places, 110/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 4 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 6 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 110 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 23 places :
Symmetric choice reduction at 0 with 23 rule applications. Total rules 23 place count 339 transition count 304
Iterating global reduction 0 with 23 rules applied. Total rules applied 46 place count 339 transition count 304
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 47 place count 338 transition count 303
Iterating global reduction 0 with 1 rules applied. Total rules applied 48 place count 338 transition count 303
Applied a total of 48 rules in 16 ms. Remains 338 /362 variables (removed 24) and now considering 303/327 (removed 24) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 16 ms. Remains : 338/362 places, 303/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 20 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 12 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 303 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Drop transitions removed 80 transitions
Trivial Post-agglo rules discarded 80 transitions
Performed 80 trivial Post agglomeration. Transition count delta: 80
Iterating post reduction 0 with 80 rules applied. Total rules applied 80 place count 362 transition count 247
Reduce places removed 80 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 1 with 82 rules applied. Total rules applied 162 place count 282 transition count 245
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 163 place count 281 transition count 245
Performed 29 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 29 Pre rules applied. Total rules applied 163 place count 281 transition count 216
Deduced a syphon composed of 29 places in 1 ms
Reduce places removed 29 places and 0 transitions.
Iterating global reduction 3 with 58 rules applied. Total rules applied 221 place count 252 transition count 216
Discarding 19 places :
Symmetric choice reduction at 3 with 19 rule applications. Total rules 240 place count 233 transition count 197
Iterating global reduction 3 with 19 rules applied. Total rules applied 259 place count 233 transition count 197
Performed 13 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 13 Pre rules applied. Total rules applied 259 place count 233 transition count 184
Deduced a syphon composed of 13 places in 1 ms
Reduce places removed 13 places and 0 transitions.
Iterating global reduction 3 with 26 rules applied. Total rules applied 285 place count 220 transition count 184
Performed 73 Post agglomeration using F-continuation condition.Transition count delta: 73
Deduced a syphon composed of 73 places in 0 ms
Reduce places removed 73 places and 0 transitions.
Iterating global reduction 3 with 146 rules applied. Total rules applied 431 place count 147 transition count 111
Applied a total of 431 rules in 27 ms. Remains 147 /362 variables (removed 215) and now considering 111/327 (removed 216) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 27 ms. Remains : 147/362 places, 111/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 5 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 6 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 111 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 24 places :
Symmetric choice reduction at 0 with 24 rule applications. Total rules 24 place count 338 transition count 303
Iterating global reduction 0 with 24 rules applied. Total rules applied 48 place count 338 transition count 303
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 49 place count 337 transition count 302
Iterating global reduction 0 with 1 rules applied. Total rules applied 50 place count 337 transition count 302
Applied a total of 50 rules in 14 ms. Remains 337 /362 variables (removed 25) and now considering 302/327 (removed 25) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 14 ms. Remains : 337/362 places, 302/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 11 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 10 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 302 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 24 places :
Symmetric choice reduction at 0 with 24 rule applications. Total rules 24 place count 338 transition count 303
Iterating global reduction 0 with 24 rules applied. Total rules applied 48 place count 338 transition count 303
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 49 place count 337 transition count 302
Iterating global reduction 0 with 1 rules applied. Total rules applied 50 place count 337 transition count 302
Applied a total of 50 rules in 28 ms. Remains 337 /362 variables (removed 25) and now considering 302/327 (removed 25) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 28 ms. Remains : 337/362 places, 302/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 11 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 11 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 302 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 25 places :
Symmetric choice reduction at 0 with 25 rule applications. Total rules 25 place count 337 transition count 302
Iterating global reduction 0 with 25 rules applied. Total rules applied 50 place count 337 transition count 302
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 51 place count 336 transition count 301
Iterating global reduction 0 with 1 rules applied. Total rules applied 52 place count 336 transition count 301
Applied a total of 52 rules in 16 ms. Remains 336 /362 variables (removed 26) and now considering 301/327 (removed 26) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 16 ms. Remains : 336/362 places, 301/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 10 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 301 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 24 places :
Symmetric choice reduction at 0 with 24 rule applications. Total rules 24 place count 338 transition count 303
Iterating global reduction 0 with 24 rules applied. Total rules applied 48 place count 338 transition count 303
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 49 place count 337 transition count 302
Iterating global reduction 0 with 1 rules applied. Total rules applied 50 place count 337 transition count 302
Applied a total of 50 rules in 16 ms. Remains 337 /362 variables (removed 25) and now considering 302/327 (removed 25) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 16 ms. Remains : 337/362 places, 302/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 13 ms
[2023-03-22 22:35:56] [INFO ] Input system was already deterministic with 302 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 18 places :
Symmetric choice reduction at 0 with 18 rule applications. Total rules 18 place count 344 transition count 309
Iterating global reduction 0 with 18 rules applied. Total rules applied 36 place count 344 transition count 309
Applied a total of 36 rules in 9 ms. Remains 344 /362 variables (removed 18) and now considering 309/327 (removed 18) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 9 ms. Remains : 344/362 places, 309/327 transitions.
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:56] [INFO ] Flatten gal took : 10 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 309 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Reduce places removed 1 places and 1 transitions.
Drop transitions removed 79 transitions
Trivial Post-agglo rules discarded 79 transitions
Performed 79 trivial Post agglomeration. Transition count delta: 79
Iterating post reduction 0 with 79 rules applied. Total rules applied 79 place count 361 transition count 247
Reduce places removed 79 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 1 with 81 rules applied. Total rules applied 160 place count 282 transition count 245
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 161 place count 281 transition count 245
Performed 29 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 29 Pre rules applied. Total rules applied 161 place count 281 transition count 216
Deduced a syphon composed of 29 places in 1 ms
Reduce places removed 29 places and 0 transitions.
Iterating global reduction 3 with 58 rules applied. Total rules applied 219 place count 252 transition count 216
Discarding 19 places :
Symmetric choice reduction at 3 with 19 rule applications. Total rules 238 place count 233 transition count 197
Iterating global reduction 3 with 19 rules applied. Total rules applied 257 place count 233 transition count 197
Performed 13 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 13 Pre rules applied. Total rules applied 257 place count 233 transition count 184
Deduced a syphon composed of 13 places in 1 ms
Reduce places removed 13 places and 0 transitions.
Iterating global reduction 3 with 26 rules applied. Total rules applied 283 place count 220 transition count 184
Performed 72 Post agglomeration using F-continuation condition.Transition count delta: 72
Deduced a syphon composed of 72 places in 0 ms
Reduce places removed 72 places and 0 transitions.
Iterating global reduction 3 with 144 rules applied. Total rules applied 427 place count 148 transition count 112
Partial Post-agglomeration rule applied 1 times.
Drop transitions removed 1 transitions
Iterating global reduction 3 with 1 rules applied. Total rules applied 428 place count 148 transition count 112
Reduce places removed 2 places and 2 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 430 place count 146 transition count 110
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 431 place count 145 transition count 110
Performed 2 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 2 Pre rules applied. Total rules applied 431 place count 145 transition count 108
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 4 with 4 rules applied. Total rules applied 435 place count 143 transition count 108
Applied a total of 435 rules in 59 ms. Remains 143 /362 variables (removed 219) and now considering 108/327 (removed 219) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 59 ms. Remains : 143/362 places, 108/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 4 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 4 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 108 transitions.
Finished random walk after 1047 steps, including 0 resets, run visited all 1 properties in 5 ms. (steps per millisecond=209 )
FORMULA ShieldPPPt-PT-005B-CTLFireability-08 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 25 places :
Symmetric choice reduction at 0 with 25 rule applications. Total rules 25 place count 337 transition count 302
Iterating global reduction 0 with 25 rules applied. Total rules applied 50 place count 337 transition count 302
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 51 place count 336 transition count 301
Iterating global reduction 0 with 1 rules applied. Total rules applied 52 place count 336 transition count 301
Applied a total of 52 rules in 12 ms. Remains 336 /362 variables (removed 26) and now considering 301/327 (removed 26) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 12 ms. Remains : 336/362 places, 301/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 21 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 301 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 22 places :
Symmetric choice reduction at 0 with 22 rule applications. Total rules 22 place count 340 transition count 305
Iterating global reduction 0 with 22 rules applied. Total rules applied 44 place count 340 transition count 305
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 45 place count 339 transition count 304
Iterating global reduction 0 with 1 rules applied. Total rules applied 46 place count 339 transition count 304
Applied a total of 46 rules in 13 ms. Remains 339 /362 variables (removed 23) and now considering 304/327 (removed 23) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 13 ms. Remains : 339/362 places, 304/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 8 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 8 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 304 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 20 places :
Symmetric choice reduction at 0 with 20 rule applications. Total rules 20 place count 342 transition count 307
Iterating global reduction 0 with 20 rules applied. Total rules applied 40 place count 342 transition count 307
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 41 place count 341 transition count 306
Iterating global reduction 0 with 1 rules applied. Total rules applied 42 place count 341 transition count 306
Applied a total of 42 rules in 13 ms. Remains 341 /362 variables (removed 21) and now considering 306/327 (removed 21) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 13 ms. Remains : 341/362 places, 306/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 8 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 306 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 24 places :
Symmetric choice reduction at 0 with 24 rule applications. Total rules 24 place count 338 transition count 303
Iterating global reduction 0 with 24 rules applied. Total rules applied 48 place count 338 transition count 303
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 49 place count 337 transition count 302
Iterating global reduction 0 with 1 rules applied. Total rules applied 50 place count 337 transition count 302
Applied a total of 50 rules in 26 ms. Remains 337 /362 variables (removed 25) and now considering 302/327 (removed 25) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 27 ms. Remains : 337/362 places, 302/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 8 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 302 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 21 places :
Symmetric choice reduction at 0 with 21 rule applications. Total rules 21 place count 341 transition count 306
Iterating global reduction 0 with 21 rules applied. Total rules applied 42 place count 341 transition count 306
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 43 place count 340 transition count 305
Iterating global reduction 0 with 1 rules applied. Total rules applied 44 place count 340 transition count 305
Applied a total of 44 rules in 13 ms. Remains 340 /362 variables (removed 22) and now considering 305/327 (removed 22) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 26 ms. Remains : 340/362 places, 305/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 8 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 7 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 305 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 24 places :
Symmetric choice reduction at 0 with 24 rule applications. Total rules 24 place count 338 transition count 303
Iterating global reduction 0 with 24 rules applied. Total rules applied 48 place count 338 transition count 303
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 49 place count 337 transition count 302
Iterating global reduction 0 with 1 rules applied. Total rules applied 50 place count 337 transition count 302
Applied a total of 50 rules in 13 ms. Remains 337 /362 variables (removed 25) and now considering 302/327 (removed 25) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 13 ms. Remains : 337/362 places, 302/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 7 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 8 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 302 transitions.
Starting structural reductions in LTL mode, iteration 0 : 362/362 places, 327/327 transitions.
Discarding 23 places :
Symmetric choice reduction at 0 with 23 rule applications. Total rules 23 place count 339 transition count 304
Iterating global reduction 0 with 23 rules applied. Total rules applied 46 place count 339 transition count 304
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 47 place count 338 transition count 303
Iterating global reduction 0 with 1 rules applied. Total rules applied 48 place count 338 transition count 303
Applied a total of 48 rules in 13 ms. Remains 338 /362 variables (removed 24) and now considering 303/327 (removed 24) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 13 ms. Remains : 338/362 places, 303/327 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 7 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 7 ms
[2023-03-22 22:35:57] [INFO ] Input system was already deterministic with 303 transitions.
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:57] [INFO ] Flatten gal took : 9 ms
[2023-03-22 22:35:57] [INFO ] Export to MCC of 15 properties in file /home/mcc/execution/CTLFireability.sr.xml took 9 ms.
[2023-03-22 22:35:57] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 362 places, 327 transitions and 834 arcs took 6 ms.
Total runtime 8086 ms.
There are residual formulas that ITS could not solve within timeout
timeout --kill-after=10s --signal=SIGINT 1m for testing only

Marcie built on Linux at 2019-11-18.
A model checker for Generalized Stochastic Petri nets

authors: Alex Tovchigrechko (IDD package and CTL model checking)

Martin Schwarick (Symbolic numerical analysis and CSL model checking)

Christian Rohr (Simulative and approximative numerical model checking)

marcie@informatik.tu-cottbus.de

called as: /home/mcc/BenchKit/bin//../reducer/bin//../../marcie/bin/marcie --net-file=model.pnml --mcc-file=CTLFireability.xml --memory=6 --mcc-mode

parse successfull
net created successfully

Net: Petri
(NrP: 362 NrTr: 327 NrArc: 834)

parse formulas
formulas created successfully
place and transition orderings generation:0m 0.011sec

net check time: 0m 0.000sec

init dd package: 0m 2.923sec


before gc: list nodes free: 461684

after gc: idd nodes used:49223576, unused:14776424; list nodes free:64025675

RS generation: 21m50.904sec


-> last computed set: #nodes 49223216 (4.9e+07) #states 10,665,519,511,896 (13)


CANNOT_COMPUTE


BK_STOP 1679525909108

--------------------
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_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination CTLFireability -timeout 360 -rebuildPNML
check for maximal unmarked siphon
ok
check for constant places
ok
check if there are places and transitions
ok
check if there are transitions without pre-places
ok
check if at least one transition is enabled in m0
ok
check if there are transitions that can never fire
ok


initing FirstDep: 0m 0.000sec

idd.cc:820: DD Exception: No free nodes

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="ShieldPPPt-PT-005B"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="marciexred"
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 2-5348"
echo " Executing tool marciexred"
echo " Input is ShieldPPPt-PT-005B, examination is CTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r394-oct2-167903718100602"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ShieldPPPt-PT-005B.tgz
mv ShieldPPPt-PT-005B execution
cd execution
if [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "UpperBounds" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] || [ "CTLFireability" = "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 [ "CTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLFireability" != "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 "CTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLFireability.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 '' CTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLFireability"
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 ;