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.r521-tall-167987246100057.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
..................
=====================================================================
Generated by BenchKit 2-5348
Executing tool ltsminxred
Input is Anderson-PT-11, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r521-tall-167987246100057
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 2.0M
-rw-r--r-- 1 mcc users 6.2K Mar 23 15:19 CTLCardinality.txt
-rw-r--r-- 1 mcc users 62K Mar 23 15:19 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.8K Mar 23 15:18 CTLFireability.txt
-rw-r--r-- 1 mcc users 52K Mar 23 15:18 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.9K Mar 23 07:06 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Mar 23 07:06 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.1K Mar 23 07:06 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Mar 23 07:06 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 Mar 26 22:42 NewModel
-rw-r--r-- 1 mcc users 11K Mar 23 15:19 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 98K Mar 23 15:19 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.4K Mar 23 15:19 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 59K Mar 23 15:19 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 23 07:06 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Mar 23 07:06 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 26 22:42 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 26 22:42 instance
-rw-r--r-- 1 mcc users 6 Mar 26 22:42 iscolored
-rw-r--r-- 1 mcc users 1.6M Mar 31 16:48 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 Anderson-PT-11-CTLCardinality-00
FORMULA_NAME Anderson-PT-11-CTLCardinality-01
FORMULA_NAME Anderson-PT-11-CTLCardinality-02
FORMULA_NAME Anderson-PT-11-CTLCardinality-03
FORMULA_NAME Anderson-PT-11-CTLCardinality-04
FORMULA_NAME Anderson-PT-11-CTLCardinality-05
FORMULA_NAME Anderson-PT-11-CTLCardinality-06
FORMULA_NAME Anderson-PT-11-CTLCardinality-07
FORMULA_NAME Anderson-PT-11-CTLCardinality-08
FORMULA_NAME Anderson-PT-11-CTLCardinality-09
FORMULA_NAME Anderson-PT-11-CTLCardinality-10
FORMULA_NAME Anderson-PT-11-CTLCardinality-11
FORMULA_NAME Anderson-PT-11-CTLCardinality-12
FORMULA_NAME Anderson-PT-11-CTLCardinality-13
FORMULA_NAME Anderson-PT-11-CTLCardinality-14
FORMULA_NAME Anderson-PT-11-CTLCardinality-15

=== Now, execution of the tool begins

BK_START 1680867505500

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=ltsminxred
BK_EXAMINATION=CTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Anderson-PT-11
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202304061127
[2023-04-07 11:38:30] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -timeout, 360, -rebuildPNML]
[2023-04-07 11:38:30] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-04-07 11:38:31] [INFO ] Load time of PNML (sax parser for PT used): 655 ms
[2023-04-07 11:38:31] [INFO ] Transformed 749 places.
[2023-04-07 11:38:31] [INFO ] Transformed 3245 transitions.
[2023-04-07 11:38:31] [INFO ] Found NUPN structural information;
[2023-04-07 11:38:31] [INFO ] Parsed PT model containing 749 places and 3245 transitions and 12540 arcs in 1190 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 23 ms.
Support contains 77 out of 749 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 749/749 places, 3245/3245 transitions.
Discarding 186 places :
Symmetric choice reduction at 0 with 186 rule applications. Total rules 186 place count 563 transition count 1139
Iterating global reduction 0 with 186 rules applied. Total rules applied 372 place count 563 transition count 1139
Applied a total of 372 rules in 311 ms. Remains 563 /749 variables (removed 186) and now considering 1139/3245 (removed 2106) transitions.
// Phase 1: matrix 1139 rows 563 cols
[2023-04-07 11:38:31] [INFO ] Computed 25 invariants in 116 ms
[2023-04-07 11:38:37] [INFO ] Implicit Places using invariants in 5595 ms returned [0]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 5697 ms to find 1 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 562/749 places, 1139/3245 transitions.
Applied a total of 0 rules in 33 ms. Remains 562 /562 variables (removed 0) and now considering 1139/1139 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 6042 ms. Remains : 562/749 places, 1139/3245 transitions.
Support contains 77 out of 562 places after structural reductions.
[2023-04-07 11:38:38] [INFO ] Flatten gal took : 358 ms
[2023-04-07 11:38:39] [INFO ] Flatten gal took : 163 ms
[2023-04-07 11:38:39] [INFO ] Input system was already deterministic with 1139 transitions.
Support contains 66 out of 562 places (down from 77) after GAL structural reductions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 514 ms. (steps per millisecond=19 ) properties (out of 40) seen :32
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 92 ms. (steps per millisecond=108 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 81 ms. (steps per millisecond=123 ) properties (out of 8) seen :1
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 53 ms. (steps per millisecond=188 ) properties (out of 7) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 73 ms. (steps per millisecond=137 ) properties (out of 7) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 49 ms. (steps per millisecond=204 ) properties (out of 7) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 37 ms. (steps per millisecond=270 ) properties (out of 7) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 28 ms. (steps per millisecond=357 ) properties (out of 7) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 28 ms. (steps per millisecond=357 ) properties (out of 7) seen :0
Running SMT prover for 7 properties.
// Phase 1: matrix 1139 rows 562 cols
[2023-04-07 11:38:40] [INFO ] Computed 24 invariants in 115 ms
[2023-04-07 11:38:41] [INFO ] After 850ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:7
[2023-04-07 11:38:42] [INFO ] [Nat]Absence check using 13 positive place invariants in 29 ms returned sat
[2023-04-07 11:38:42] [INFO ] [Nat]Absence check using 13 positive and 11 generalized place invariants in 40 ms returned sat
[2023-04-07 11:38:48] [INFO ] After 5321ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :7
[2023-04-07 11:38:48] [INFO ] State equation strengthened by 110 read => feed constraints.
[2023-04-07 11:38:49] [INFO ] After 715ms SMT Verify possible using 110 Read/Feed constraints in natural domain returned unsat :0 sat :7
[2023-04-07 11:38:50] [INFO ] After 1795ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :7
Attempting to minimize the solution found.
Minimization took 835 ms.
[2023-04-07 11:38:51] [INFO ] After 9220ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :7
Parikh walk visited 2 properties in 44 ms.
Support contains 8 out of 562 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 117 transitions
Trivial Post-agglo rules discarded 117 transitions
Performed 117 trivial Post agglomeration. Transition count delta: 117
Iterating post reduction 0 with 117 rules applied. Total rules applied 117 place count 562 transition count 1022
Reduce places removed 117 places and 0 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Iterating post reduction 1 with 119 rules applied. Total rules applied 236 place count 445 transition count 1020
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 2 with 2 rules applied. Total rules applied 238 place count 443 transition count 1020
Performed 108 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 108 Pre rules applied. Total rules applied 238 place count 443 transition count 912
Deduced a syphon composed of 108 places in 2 ms
Reduce places removed 108 places and 0 transitions.
Iterating global reduction 3 with 216 rules applied. Total rules applied 454 place count 335 transition count 912
Discarding 30 places :
Symmetric choice reduction at 3 with 30 rule applications. Total rules 484 place count 305 transition count 642
Iterating global reduction 3 with 30 rules applied. Total rules applied 514 place count 305 transition count 642
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 3 with 4 rules applied. Total rules applied 518 place count 303 transition count 640
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 3 with 1 rules applied. Total rules applied 519 place count 303 transition count 639
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 520 place count 302 transition count 639
Applied a total of 520 rules in 266 ms. Remains 302 /562 variables (removed 260) and now considering 639/1139 (removed 500) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 266 ms. Remains : 302/562 places, 639/1139 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 114 ms. (steps per millisecond=87 ) properties (out of 5) seen :1
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 79 ms. (steps per millisecond=126 ) properties (out of 4) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 58 ms. (steps per millisecond=172 ) properties (out of 4) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 40 ms. (steps per millisecond=250 ) properties (out of 4) seen :1
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 16 ms. (steps per millisecond=625 ) properties (out of 3) seen :0
Running SMT prover for 3 properties.
// Phase 1: matrix 639 rows 302 cols
[2023-04-07 11:38:51] [INFO ] Computed 24 invariants in 4 ms
[2023-04-07 11:38:52] [INFO ] After 858ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:3
[2023-04-07 11:38:52] [INFO ] [Nat]Absence check using 13 positive place invariants in 58 ms returned sat
[2023-04-07 11:38:52] [INFO ] [Nat]Absence check using 13 positive and 11 generalized place invariants in 71 ms returned sat
[2023-04-07 11:38:53] [INFO ] After 685ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :3
[2023-04-07 11:38:53] [INFO ] State equation strengthened by 110 read => feed constraints.
[2023-04-07 11:38:53] [INFO ] After 225ms SMT Verify possible using 110 Read/Feed constraints in natural domain returned unsat :0 sat :3
[2023-04-07 11:38:54] [INFO ] After 457ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :3
Attempting to minimize the solution found.
Minimization took 187 ms.
[2023-04-07 11:38:54] [INFO ] After 1791ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :3
Parikh walk visited 0 properties in 23 ms.
Support contains 5 out of 302 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 302/302 places, 639/639 transitions.
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 1 place count 301 transition count 618
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 301 transition count 618
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 301 transition count 617
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 4 place count 300 transition count 617
Applied a total of 4 rules in 103 ms. Remains 300 /302 variables (removed 2) and now considering 617/639 (removed 22) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 115 ms. Remains : 300/302 places, 617/639 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 205 ms. (steps per millisecond=48 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 59 ms. (steps per millisecond=169 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 75 ms. (steps per millisecond=133 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 47 ms. (steps per millisecond=212 ) properties (out of 3) seen :0
Interrupted probabilistic random walk after 895580 steps, run timeout after 3001 ms. (steps per millisecond=298 ) properties seen :{1=1, 2=1}
Probabilistic random walk after 895580 steps, saw 672654 distinct states, run finished after 3015 ms. (steps per millisecond=297 ) properties seen :2
Running SMT prover for 1 properties.
// Phase 1: matrix 617 rows 300 cols
[2023-04-07 11:38:57] [INFO ] Computed 24 invariants in 6 ms
[2023-04-07 11:38:58] [INFO ] After 207ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-04-07 11:38:58] [INFO ] [Nat]Absence check using 13 positive place invariants in 6 ms returned sat
[2023-04-07 11:38:58] [INFO ] [Nat]Absence check using 13 positive and 11 generalized place invariants in 14 ms returned sat
[2023-04-07 11:38:58] [INFO ] After 508ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-04-07 11:38:58] [INFO ] State equation strengthened by 110 read => feed constraints.
[2023-04-07 11:38:58] [INFO ] After 72ms SMT Verify possible using 110 Read/Feed constraints in natural domain returned unsat :0 sat :1
[2023-04-07 11:38:58] [INFO ] After 171ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 52 ms.
[2023-04-07 11:38:58] [INFO ] After 897ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Parikh walk visited 0 properties in 1 ms.
Support contains 3 out of 300 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 300/300 places, 617/617 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Deduced a syphon composed of 2 places in 1 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 0 with 4 rules applied. Total rules applied 4 place count 298 transition count 615
Applied a total of 4 rules in 51 ms. Remains 298 /300 variables (removed 2) and now considering 615/617 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 51 ms. Remains : 298/300 places, 615/617 transitions.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 107 ms. (steps per millisecond=93 ) properties (out of 1) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 23 ms. (steps per millisecond=434 ) properties (out of 1) seen :0
Interrupted probabilistic random walk after 1001210 steps, run timeout after 3001 ms. (steps per millisecond=333 ) properties seen :{}
Probabilistic random walk after 1001210 steps, saw 747606 distinct states, run finished after 3019 ms. (steps per millisecond=331 ) properties seen :0
Running SMT prover for 1 properties.
// Phase 1: matrix 615 rows 298 cols
[2023-04-07 11:39:02] [INFO ] Computed 24 invariants in 3 ms
[2023-04-07 11:39:02] [INFO ] After 175ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-04-07 11:39:02] [INFO ] [Nat]Absence check using 13 positive place invariants in 14 ms returned sat
[2023-04-07 11:39:02] [INFO ] [Nat]Absence check using 13 positive and 11 generalized place invariants in 23 ms returned sat
[2023-04-07 11:39:02] [INFO ] After 321ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-04-07 11:39:02] [INFO ] State equation strengthened by 110 read => feed constraints.
[2023-04-07 11:39:02] [INFO ] After 110ms SMT Verify possible using 110 Read/Feed constraints in natural domain returned unsat :0 sat :1
[2023-04-07 11:39:03] [INFO ] After 181ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 70 ms.
[2023-04-07 11:39:03] [INFO ] After 726ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Parikh walk visited 0 properties in 1 ms.
Support contains 3 out of 298 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 298/298 places, 615/615 transitions.
Applied a total of 0 rules in 21 ms. Remains 298 /298 variables (removed 0) and now considering 615/615 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 25 ms. Remains : 298/298 places, 615/615 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 298/298 places, 615/615 transitions.
Applied a total of 0 rules in 23 ms. Remains 298 /298 variables (removed 0) and now considering 615/615 (removed 0) transitions.
[2023-04-07 11:39:03] [INFO ] Invariant cache hit.
[2023-04-07 11:39:05] [INFO ] Implicit Places using invariants in 2618 ms returned []
[2023-04-07 11:39:05] [INFO ] Invariant cache hit.
[2023-04-07 11:39:06] [INFO ] State equation strengthened by 110 read => feed constraints.
[2023-04-07 11:39:07] [INFO ] Implicit Places using invariants and state equation in 1456 ms returned []
Implicit Place search using SMT with State Equation took 4096 ms to find 0 implicit places.
[2023-04-07 11:39:07] [INFO ] Redundant transitions in 54 ms returned []
[2023-04-07 11:39:07] [INFO ] Invariant cache hit.
[2023-04-07 11:39:08] [INFO ] Dead Transitions using invariants and state equation in 690 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4893 ms. Remains : 298/298 places, 615/615 transitions.
Performed 119 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 0 with 119 Pre rules applied. Total rules applied 0 place count 298 transition count 496
Deduced a syphon composed of 119 places in 0 ms
Reduce places removed 119 places and 0 transitions.
Iterating global reduction 0 with 238 rules applied. Total rules applied 238 place count 179 transition count 496
Applied a total of 238 rules in 33 ms. Remains 179 /298 variables (removed 119) and now considering 496/615 (removed 119) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 496 rows 179 cols
[2023-04-07 11:39:08] [INFO ] Computed 24 invariants in 34 ms
[2023-04-07 11:39:08] [INFO ] After 101ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-04-07 11:39:08] [INFO ] [Nat]Absence check using 13 positive place invariants in 4 ms returned sat
[2023-04-07 11:39:08] [INFO ] [Nat]Absence check using 13 positive and 11 generalized place invariants in 20 ms returned sat
[2023-04-07 11:39:08] [INFO ] After 404ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-04-07 11:39:08] [INFO ] After 485ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 60 ms.
[2023-04-07 11:39:08] [INFO ] After 683ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
[2023-04-07 11:39:09] [INFO ] Flatten gal took : 148 ms
[2023-04-07 11:39:09] [INFO ] Flatten gal took : 176 ms
[2023-04-07 11:39:09] [INFO ] Input system was already deterministic with 1139 transitions.
Support contains 65 out of 562 places (down from 66) after GAL structural reductions.
Computed a total of 0 stabilizing places and 0 stable transitions
Starting structural reductions in SI_CTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 119 transitions
Trivial Post-agglo rules discarded 119 transitions
Performed 119 trivial Post agglomeration. Transition count delta: 119
Iterating post reduction 0 with 119 rules applied. Total rules applied 119 place count 562 transition count 1020
Reduce places removed 119 places and 0 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Iterating post reduction 1 with 120 rules applied. Total rules applied 239 place count 443 transition count 1019
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 240 place count 442 transition count 1019
Performed 108 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 108 Pre rules applied. Total rules applied 240 place count 442 transition count 911
Deduced a syphon composed of 108 places in 0 ms
Reduce places removed 108 places and 0 transitions.
Iterating global reduction 3 with 216 rules applied. Total rules applied 456 place count 334 transition count 911
Discarding 31 places :
Symmetric choice reduction at 3 with 31 rule applications. Total rules 487 place count 303 transition count 620
Iterating global reduction 3 with 31 rules applied. Total rules applied 518 place count 303 transition count 620
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 3 with 4 rules applied. Total rules applied 522 place count 301 transition count 618
Applied a total of 522 rules in 116 ms. Remains 301 /562 variables (removed 261) and now considering 618/1139 (removed 521) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 117 ms. Remains : 301/562 places, 618/1139 transitions.
[2023-04-07 11:39:09] [INFO ] Flatten gal took : 61 ms
[2023-04-07 11:39:09] [INFO ] Flatten gal took : 72 ms
[2023-04-07 11:39:10] [INFO ] Input system was already deterministic with 618 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 34 places :
Symmetric choice reduction at 0 with 34 rule applications. Total rules 34 place count 528 transition count 825
Iterating global reduction 0 with 34 rules applied. Total rules applied 68 place count 528 transition count 825
Applied a total of 68 rules in 31 ms. Remains 528 /562 variables (removed 34) and now considering 825/1139 (removed 314) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 32 ms. Remains : 528/562 places, 825/1139 transitions.
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 38 ms
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 24 ms
[2023-04-07 11:39:10] [INFO ] Input system was already deterministic with 825 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 26 places :
Symmetric choice reduction at 0 with 26 rule applications. Total rules 26 place count 536 transition count 933
Iterating global reduction 0 with 26 rules applied. Total rules applied 52 place count 536 transition count 933
Applied a total of 52 rules in 37 ms. Remains 536 /562 variables (removed 26) and now considering 933/1139 (removed 206) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 37 ms. Remains : 536/562 places, 933/1139 transitions.
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 42 ms
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 51 ms
[2023-04-07 11:39:10] [INFO ] Input system was already deterministic with 933 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 119 transitions
Trivial Post-agglo rules discarded 119 transitions
Performed 119 trivial Post agglomeration. Transition count delta: 119
Iterating post reduction 0 with 119 rules applied. Total rules applied 119 place count 562 transition count 1020
Reduce places removed 119 places and 0 transitions.
Iterating post reduction 1 with 119 rules applied. Total rules applied 238 place count 443 transition count 1020
Performed 110 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 110 Pre rules applied. Total rules applied 238 place count 443 transition count 910
Deduced a syphon composed of 110 places in 0 ms
Reduce places removed 110 places and 0 transitions.
Iterating global reduction 2 with 220 rules applied. Total rules applied 458 place count 333 transition count 910
Discarding 32 places :
Symmetric choice reduction at 2 with 32 rule applications. Total rules 490 place count 301 transition count 638
Iterating global reduction 2 with 32 rules applied. Total rules applied 522 place count 301 transition count 638
Applied a total of 522 rules in 41 ms. Remains 301 /562 variables (removed 261) and now considering 638/1139 (removed 501) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 42 ms. Remains : 301/562 places, 638/1139 transitions.
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 35 ms
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 36 ms
[2023-04-07 11:39:10] [INFO ] Input system was already deterministic with 638 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 34 places :
Symmetric choice reduction at 0 with 34 rule applications. Total rules 34 place count 528 transition count 825
Iterating global reduction 0 with 34 rules applied. Total rules applied 68 place count 528 transition count 825
Applied a total of 68 rules in 46 ms. Remains 528 /562 variables (removed 34) and now considering 825/1139 (removed 314) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 46 ms. Remains : 528/562 places, 825/1139 transitions.
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 36 ms
[2023-04-07 11:39:10] [INFO ] Flatten gal took : 30 ms
[2023-04-07 11:39:10] [INFO ] Input system was already deterministic with 825 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 28 places :
Symmetric choice reduction at 0 with 28 rule applications. Total rules 28 place count 534 transition count 871
Iterating global reduction 0 with 28 rules applied. Total rules applied 56 place count 534 transition count 871
Applied a total of 56 rules in 49 ms. Remains 534 /562 variables (removed 28) and now considering 871/1139 (removed 268) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 49 ms. Remains : 534/562 places, 871/1139 transitions.
[2023-04-07 11:39:11] [INFO ] Flatten gal took : 38 ms
[2023-04-07 11:39:11] [INFO ] Flatten gal took : 39 ms
[2023-04-07 11:39:11] [INFO ] Input system was already deterministic with 871 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 96 transitions
Trivial Post-agglo rules discarded 96 transitions
Performed 96 trivial Post agglomeration. Transition count delta: 96
Iterating post reduction 0 with 96 rules applied. Total rules applied 96 place count 562 transition count 1043
Reduce places removed 96 places and 0 transitions.
Performed 12 Post agglomeration using F-continuation condition.Transition count delta: 12
Iterating post reduction 1 with 108 rules applied. Total rules applied 204 place count 466 transition count 1031
Reduce places removed 12 places and 0 transitions.
Iterating post reduction 2 with 12 rules applied. Total rules applied 216 place count 454 transition count 1031
Performed 109 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 109 Pre rules applied. Total rules applied 216 place count 454 transition count 922
Deduced a syphon composed of 109 places in 0 ms
Reduce places removed 109 places and 0 transitions.
Iterating global reduction 3 with 218 rules applied. Total rules applied 434 place count 345 transition count 922
Discarding 33 places :
Symmetric choice reduction at 3 with 33 rule applications. Total rules 467 place count 312 transition count 629
Iterating global reduction 3 with 33 rules applied. Total rules applied 500 place count 312 transition count 629
Applied a total of 500 rules in 97 ms. Remains 312 /562 variables (removed 250) and now considering 629/1139 (removed 510) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 107 ms. Remains : 312/562 places, 629/1139 transitions.
[2023-04-07 11:39:11] [INFO ] Flatten gal took : 54 ms
[2023-04-07 11:39:11] [INFO ] Flatten gal took : 44 ms
[2023-04-07 11:39:11] [INFO ] Input system was already deterministic with 629 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 120 transitions
Trivial Post-agglo rules discarded 120 transitions
Performed 120 trivial Post agglomeration. Transition count delta: 120
Iterating post reduction 0 with 120 rules applied. Total rules applied 120 place count 562 transition count 1019
Reduce places removed 120 places and 0 transitions.
Iterating post reduction 1 with 120 rules applied. Total rules applied 240 place count 442 transition count 1019
Performed 107 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 107 Pre rules applied. Total rules applied 240 place count 442 transition count 912
Deduced a syphon composed of 107 places in 0 ms
Reduce places removed 107 places and 0 transitions.
Iterating global reduction 2 with 214 rules applied. Total rules applied 454 place count 335 transition count 912
Discarding 32 places :
Symmetric choice reduction at 2 with 32 rule applications. Total rules 486 place count 303 transition count 620
Iterating global reduction 2 with 32 rules applied. Total rules applied 518 place count 303 transition count 620
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 2 with 2 rules applied. Total rules applied 520 place count 302 transition count 619
Applied a total of 520 rules in 98 ms. Remains 302 /562 variables (removed 260) and now considering 619/1139 (removed 520) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 109 ms. Remains : 302/562 places, 619/1139 transitions.
[2023-04-07 11:39:11] [INFO ] Flatten gal took : 55 ms
[2023-04-07 11:39:11] [INFO ] Flatten gal took : 43 ms
[2023-04-07 11:39:11] [INFO ] Input system was already deterministic with 619 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 34 places :
Symmetric choice reduction at 0 with 34 rule applications. Total rules 34 place count 528 transition count 825
Iterating global reduction 0 with 34 rules applied. Total rules applied 68 place count 528 transition count 825
Applied a total of 68 rules in 72 ms. Remains 528 /562 variables (removed 34) and now considering 825/1139 (removed 314) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 72 ms. Remains : 528/562 places, 825/1139 transitions.
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 55 ms
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 79 ms
[2023-04-07 11:39:12] [INFO ] Input system was already deterministic with 825 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 33 places :
Symmetric choice reduction at 0 with 33 rule applications. Total rules 33 place count 529 transition count 826
Iterating global reduction 0 with 33 rules applied. Total rules applied 66 place count 529 transition count 826
Applied a total of 66 rules in 41 ms. Remains 529 /562 variables (removed 33) and now considering 826/1139 (removed 313) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 56 ms. Remains : 529/562 places, 826/1139 transitions.
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 38 ms
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 37 ms
[2023-04-07 11:39:12] [INFO ] Input system was already deterministic with 826 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 32 places :
Symmetric choice reduction at 0 with 32 rule applications. Total rules 32 place count 530 transition count 827
Iterating global reduction 0 with 32 rules applied. Total rules applied 64 place count 530 transition count 827
Applied a total of 64 rules in 20 ms. Remains 530 /562 variables (removed 32) and now considering 827/1139 (removed 312) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 28 ms. Remains : 530/562 places, 827/1139 transitions.
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 44 ms
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 66 ms
[2023-04-07 11:39:12] [INFO ] Input system was already deterministic with 827 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 34 places :
Symmetric choice reduction at 0 with 34 rule applications. Total rules 34 place count 528 transition count 825
Iterating global reduction 0 with 34 rules applied. Total rules applied 68 place count 528 transition count 825
Applied a total of 68 rules in 31 ms. Remains 528 /562 variables (removed 34) and now considering 825/1139 (removed 314) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 35 ms. Remains : 528/562 places, 825/1139 transitions.
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 17 ms
[2023-04-07 11:39:12] [INFO ] Flatten gal took : 33 ms
[2023-04-07 11:39:12] [INFO ] Input system was already deterministic with 825 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 121 transitions
Trivial Post-agglo rules discarded 121 transitions
Performed 121 trivial Post agglomeration. Transition count delta: 121
Iterating post reduction 0 with 121 rules applied. Total rules applied 121 place count 562 transition count 1018
Reduce places removed 121 places and 0 transitions.
Iterating post reduction 1 with 121 rules applied. Total rules applied 242 place count 441 transition count 1018
Performed 110 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 110 Pre rules applied. Total rules applied 242 place count 441 transition count 908
Deduced a syphon composed of 110 places in 0 ms
Reduce places removed 110 places and 0 transitions.
Iterating global reduction 2 with 220 rules applied. Total rules applied 462 place count 331 transition count 908
Discarding 34 places :
Symmetric choice reduction at 2 with 34 rule applications. Total rules 496 place count 297 transition count 594
Iterating global reduction 2 with 34 rules applied. Total rules applied 530 place count 297 transition count 594
Applied a total of 530 rules in 115 ms. Remains 297 /562 variables (removed 265) and now considering 594/1139 (removed 545) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 115 ms. Remains : 297/562 places, 594/1139 transitions.
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 36 ms
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 35 ms
[2023-04-07 11:39:13] [INFO ] Input system was already deterministic with 594 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Drop transitions removed 119 transitions
Trivial Post-agglo rules discarded 119 transitions
Performed 119 trivial Post agglomeration. Transition count delta: 119
Iterating post reduction 0 with 119 rules applied. Total rules applied 119 place count 562 transition count 1020
Reduce places removed 119 places and 0 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Iterating post reduction 1 with 121 rules applied. Total rules applied 240 place count 443 transition count 1018
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 2 with 2 rules applied. Total rules applied 242 place count 441 transition count 1018
Performed 110 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 110 Pre rules applied. Total rules applied 242 place count 441 transition count 908
Deduced a syphon composed of 110 places in 1 ms
Reduce places removed 110 places and 0 transitions.
Iterating global reduction 3 with 220 rules applied. Total rules applied 462 place count 331 transition count 908
Discarding 34 places :
Symmetric choice reduction at 3 with 34 rule applications. Total rules 496 place count 297 transition count 594
Iterating global reduction 3 with 34 rules applied. Total rules applied 530 place count 297 transition count 594
Applied a total of 530 rules in 83 ms. Remains 297 /562 variables (removed 265) and now considering 594/1139 (removed 545) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 95 ms. Remains : 297/562 places, 594/1139 transitions.
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 30 ms
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 31 ms
[2023-04-07 11:39:13] [INFO ] Input system was already deterministic with 594 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 33 places :
Symmetric choice reduction at 0 with 33 rule applications. Total rules 33 place count 529 transition count 846
Iterating global reduction 0 with 33 rules applied. Total rules applied 66 place count 529 transition count 846
Applied a total of 66 rules in 46 ms. Remains 529 /562 variables (removed 33) and now considering 846/1139 (removed 293) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 58 ms. Remains : 529/562 places, 846/1139 transitions.
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 43 ms
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 26 ms
[2023-04-07 11:39:13] [INFO ] Input system was already deterministic with 846 transitions.
Starting structural reductions in LTL mode, iteration 0 : 562/562 places, 1139/1139 transitions.
Discarding 32 places :
Symmetric choice reduction at 0 with 32 rule applications. Total rules 32 place count 530 transition count 827
Iterating global reduction 0 with 32 rules applied. Total rules applied 64 place count 530 transition count 827
Applied a total of 64 rules in 18 ms. Remains 530 /562 variables (removed 32) and now considering 827/1139 (removed 312) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 34 ms. Remains : 530/562 places, 827/1139 transitions.
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 29 ms
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 19 ms
[2023-04-07 11:39:13] [INFO ] Input system was already deterministic with 827 transitions.
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 41 ms
[2023-04-07 11:39:13] [INFO ] Flatten gal took : 37 ms
[2023-04-07 11:39:13] [INFO ] Export to MCC of 16 properties in file /home/mcc/execution/CTLCardinality.sr.xml took 4 ms.
[2023-04-07 11:39:14] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 562 places, 1139 transitions and 4054 arcs took 17 ms.
Total runtime 44017 ms.
There are residual formulas that ITS could not solve within timeout
pnml2lts-sym model.pnml --lace-workers=4 --vset=lddmc --saturation=sat -rbs,w2W,ru,hf --sylvan-sizes=20,28,20,28 --ctl=/tmp/518/ctl_0_ --ctl=/tmp/518/ctl_1_ --ctl=/tmp/518/ctl_2_ --ctl=/tmp/518/ctl_3_ --ctl=/tmp/518/ctl_4_ --ctl=/tmp/518/ctl_5_ --ctl=/tmp/518/ctl_6_ --ctl=/tmp/518/ctl_7_ --ctl=/tmp/518/ctl_8_ --ctl=/tmp/518/ctl_9_ --ctl=/tmp/518/ctl_10_ --ctl=/tmp/518/ctl_11_ --ctl=/tmp/518/ctl_12_ --ctl=/tmp/518/ctl_13_ --ctl=/tmp/518/ctl_14_ --ctl=/tmp/518/ctl_15_ --mu-par --mu-opt
TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16393216 kB
MemFree: 15546604 kB
After kill :
MemTotal: 16393216 kB
MemFree: 16104040 kB

BK_TIME_CONFINEMENT_REACHED

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

+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202304061127.jar
+ VERSION=202304061127
+ echo 'Running Version 202304061127'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination CTLCardinality -timeout 360 -rebuildPNML
mcc2023

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="Anderson-PT-11"
export BK_EXAMINATION="CTLCardinality"
export BK_TOOL="ltsminxred"
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 ltsminxred"
echo " Input is Anderson-PT-11, examination is CTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r521-tall-167987246100057"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/Anderson-PT-11.tgz
mv Anderson-PT-11 execution
cd execution
if [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "UpperBounds" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] || [ "CTLCardinality" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh

echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "CTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLCardinality" != "StateSpace" ] ; then
echo "The expected result is a vector of booleans"
echo BOOL_VECTOR
else
echo "no data necessary for post analysis"
fi
echo
if [ -f "CTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLCardinality.xml" ] ; then # for cunf (txt files deleted;-)
echo echo "here is the order used to build the result vector(from xml file)"
for x in $(grep '' CTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLCardinality"
fi
echo
echo "=== Now, execution of the tool begins"
echo
echo -n "BK_START "
date -u +%s%3N
echo
timeout -s 9 $BK_TIME_CONFINEMENT bash -c "/home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n \"BK_STOP \" ; date -u +%s%3N"
if [ $? -eq 137 ] ; then
echo
echo "BK_TIME_CONFINEMENT_REACHED"
fi
echo
echo "--------------------"
echo "content from stderr:"
echo
cat STDERR ;