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.r105-tall-167814480800127.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 CloudReconfiguration-PT-316, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r105-tall-167814480800127
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.1M
-rw-r--r-- 1 mcc users 6.5K Feb 25 11:50 CTLCardinality.txt
-rw-r--r-- 1 mcc users 65K Feb 25 11:50 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.9K Feb 25 11:49 CTLFireability.txt
-rw-r--r-- 1 mcc users 53K Feb 25 11:49 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.8K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.0K Feb 25 15:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Feb 25 15:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Feb 25 15:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Feb 25 15:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 13K Feb 25 11:50 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 133K Feb 25 11:50 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.3K Feb 25 11:50 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 68K Feb 25 11:50 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Feb 25 15:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 25 15:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 660K Mar 5 18:22 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 CloudReconfiguration-PT-316-ReachabilityFireability-00
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-01
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-02
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-03
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-04
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-05
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-06
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-07
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-08
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-09
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-10
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-11
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-12
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-13
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-14
FORMULA_NAME CloudReconfiguration-PT-316-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1678262141098

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=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=CloudReconfiguration-PT-316
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-08 07:55:42] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2023-03-08 07:55:42] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-08 07:55:43] [INFO ] Load time of PNML (sax parser for PT used): 134 ms
[2023-03-08 07:55:43] [INFO ] Transformed 2585 places.
[2023-03-08 07:55:43] [INFO ] Transformed 3095 transitions.
[2023-03-08 07:55:43] [INFO ] Found NUPN structural information;
[2023-03-08 07:55:43] [INFO ] Parsed PT model containing 2585 places and 3095 transitions and 6463 arcs in 482 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 12 ms.
Working with output stream class java.io.PrintStream
Incomplete random walk after 10000 steps, including 84 resets, run finished after 584 ms. (steps per millisecond=17 ) properties (out of 16) seen :2
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-00 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 27 resets, run finished after 172 ms. (steps per millisecond=58 ) properties (out of 14) seen :0
Incomplete Best-First random walk after 10001 steps, including 25 resets, run finished after 99 ms. (steps per millisecond=101 ) properties (out of 14) seen :0
Incomplete Best-First random walk after 10001 steps, including 26 resets, run finished after 82 ms. (steps per millisecond=121 ) properties (out of 14) seen :1
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-10 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 20 resets, run finished after 99 ms. (steps per millisecond=101 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 24 resets, run finished after 91 ms. (steps per millisecond=109 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10000 steps, including 22 resets, run finished after 75 ms. (steps per millisecond=133 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 24 resets, run finished after 102 ms. (steps per millisecond=98 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 25 resets, run finished after 79 ms. (steps per millisecond=126 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 27 resets, run finished after 68 ms. (steps per millisecond=147 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 24 resets, run finished after 70 ms. (steps per millisecond=142 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 24 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10000 steps, including 21 resets, run finished after 71 ms. (steps per millisecond=140 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10000 steps, including 26 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 13) seen :0
Running SMT prover for 13 properties.
// Phase 1: matrix 3095 rows 2585 cols
[2023-03-08 07:55:45] [INFO ] Computed 4 place invariants in 46 ms
[2023-03-08 07:55:46] [INFO ] After 1214ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:13
[2023-03-08 07:55:47] [INFO ] [Nat]Absence check using 0 positive and 4 generalized place invariants in 24 ms returned sat
[2023-03-08 07:55:50] [INFO ] After 2670ms SMT Verify possible using state equation in natural domain returned unsat :6 sat :7
[2023-03-08 07:55:52] [INFO ] After 4413ms SMT Verify possible using trap constraints in natural domain returned unsat :6 sat :7
Attempting to minimize the solution found.
Minimization took 780 ms.
[2023-03-08 07:55:53] [INFO ] After 6752ms SMT Verify possible using all constraints in natural domain returned unsat :6 sat :7
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-15 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-14 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-07 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-03 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-02 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-01 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 13 Parikh solutions to 7 different solutions.
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL PARIKH_WALK
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-13 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Parikh walk visited 2 properties in 96 ms.
Support contains 18 out of 2585 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 2585/2585 places, 3095/3095 transitions.
Graph (trivial) has 2911 edges and 2585 vertex of which 806 / 2585 are part of one of the 59 SCC in 10 ms
Free SCC test removed 747 places
Drop transitions removed 909 transitions
Reduce isomorphic transitions removed 909 transitions.
Graph (complete) has 2466 edges and 1838 vertex of which 1825 are kept as prefixes of interest. Removing 13 places using SCC suffix rule.4 ms
Discarding 13 places :
Also discarding 8 output transitions
Drop transitions removed 8 transitions
Drop transitions removed 8 transitions
Reduce isomorphic transitions removed 8 transitions.
Drop transitions removed 1211 transitions
Trivial Post-agglo rules discarded 1211 transitions
Performed 1211 trivial Post agglomeration. Transition count delta: 1211
Iterating post reduction 0 with 1219 rules applied. Total rules applied 1221 place count 1825 transition count 959
Reduce places removed 1211 places and 0 transitions.
Ensure Unique test removed 74 transitions
Reduce isomorphic transitions removed 74 transitions.
Drop transitions removed 59 transitions
Trivial Post-agglo rules discarded 59 transitions
Performed 59 trivial Post agglomeration. Transition count delta: 59
Iterating post reduction 1 with 1344 rules applied. Total rules applied 2565 place count 614 transition count 826
Reduce places removed 59 places and 0 transitions.
Ensure Unique test removed 7 transitions
Reduce isomorphic transitions removed 7 transitions.
Drop transitions removed 4 transitions
Trivial Post-agglo rules discarded 4 transitions
Performed 4 trivial Post agglomeration. Transition count delta: 4
Iterating post reduction 2 with 70 rules applied. Total rules applied 2635 place count 555 transition count 815
Reduce places removed 4 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 3 with 6 rules applied. Total rules applied 2641 place count 551 transition count 813
Reduce places removed 1 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions removed 2 transitions
Trivial Post-agglo rules discarded 2 transitions
Performed 2 trivial Post agglomeration. Transition count delta: 2
Iterating post reduction 4 with 4 rules applied. Total rules applied 2645 place count 550 transition count 810
Reduce places removed 2 places and 0 transitions.
Performed 21 Post agglomeration using F-continuation condition.Transition count delta: 21
Iterating post reduction 5 with 23 rules applied. Total rules applied 2668 place count 548 transition count 789
Reduce places removed 21 places and 0 transitions.
Ensure Unique test removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 6 with 26 rules applied. Total rules applied 2694 place count 527 transition count 784
Performed 21 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 7 with 21 Pre rules applied. Total rules applied 2694 place count 527 transition count 763
Deduced a syphon composed of 21 places in 2 ms
Reduce places removed 21 places and 0 transitions.
Iterating global reduction 7 with 42 rules applied. Total rules applied 2736 place count 506 transition count 763
Discarding 79 places :
Symmetric choice reduction at 7 with 79 rule applications. Total rules 2815 place count 427 transition count 684
Iterating global reduction 7 with 79 rules applied. Total rules applied 2894 place count 427 transition count 684
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 7 with 2 rules applied. Total rules applied 2896 place count 427 transition count 682
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 8 with 1 rules applied. Total rules applied 2897 place count 426 transition count 682
Performed 9 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 9 with 9 Pre rules applied. Total rules applied 2897 place count 426 transition count 673
Deduced a syphon composed of 9 places in 1 ms
Reduce places removed 9 places and 0 transitions.
Iterating global reduction 9 with 18 rules applied. Total rules applied 2915 place count 417 transition count 673
Discarding 61 places :
Symmetric choice reduction at 9 with 61 rule applications. Total rules 2976 place count 356 transition count 612
Iterating global reduction 9 with 61 rules applied. Total rules applied 3037 place count 356 transition count 612
Ensure Unique test removed 17 transitions
Reduce isomorphic transitions removed 17 transitions.
Drop transitions removed 17 transitions
Trivial Post-agglo rules discarded 17 transitions
Performed 17 trivial Post agglomeration. Transition count delta: 17
Iterating post reduction 9 with 34 rules applied. Total rules applied 3071 place count 356 transition count 578
Reduce places removed 17 places and 0 transitions.
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Drop transitions removed 4 transitions
Trivial Post-agglo rules discarded 4 transitions
Performed 4 trivial Post agglomeration. Transition count delta: 4
Iterating post reduction 10 with 25 rules applied. Total rules applied 3096 place count 339 transition count 570
Reduce places removed 4 places and 0 transitions.
Iterating post reduction 11 with 4 rules applied. Total rules applied 3100 place count 335 transition count 570
Discarding 19 places :
Symmetric choice reduction at 12 with 19 rule applications. Total rules 3119 place count 316 transition count 541
Iterating global reduction 12 with 19 rules applied. Total rules applied 3138 place count 316 transition count 541
Ensure Unique test removed 9 transitions
Reduce isomorphic transitions removed 9 transitions.
Iterating post reduction 12 with 9 rules applied. Total rules applied 3147 place count 316 transition count 532
Discarding 7 places :
Symmetric choice reduction at 13 with 7 rule applications. Total rules 3154 place count 309 transition count 518
Iterating global reduction 13 with 7 rules applied. Total rules applied 3161 place count 309 transition count 518
Discarding 3 places :
Symmetric choice reduction at 13 with 3 rule applications. Total rules 3164 place count 306 transition count 512
Iterating global reduction 13 with 3 rules applied. Total rules applied 3167 place count 306 transition count 512
Performed 151 Post agglomeration using F-continuation condition with reduction of 73 identical transitions.
Deduced a syphon composed of 151 places in 0 ms
Reduce places removed 151 places and 0 transitions.
Iterating global reduction 13 with 302 rules applied. Total rules applied 3469 place count 155 transition count 288
Ensure Unique test removed 8 transitions
Reduce isomorphic transitions removed 8 transitions.
Iterating post reduction 13 with 8 rules applied. Total rules applied 3477 place count 155 transition count 280
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 1 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 14 with 6 rules applied. Total rules applied 3483 place count 152 transition count 277
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 14 with 6 rules applied. Total rules applied 3489 place count 152 transition count 271
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 1 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 15 with 6 rules applied. Total rules applied 3495 place count 149 transition count 268
Ensure Unique test removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 15 with 5 rules applied. Total rules applied 3500 place count 149 transition count 263
Performed 37 Post agglomeration using F-continuation condition with reduction of 15 identical transitions.
Deduced a syphon composed of 37 places in 1 ms
Reduce places removed 37 places and 0 transitions.
Iterating global reduction 16 with 74 rules applied. Total rules applied 3574 place count 112 transition count 296
Ensure Unique test removed 26 transitions
Reduce isomorphic transitions removed 26 transitions.
Iterating post reduction 16 with 26 rules applied. Total rules applied 3600 place count 112 transition count 270
Discarding 19 places :
Symmetric choice reduction at 17 with 19 rule applications. Total rules 3619 place count 93 transition count 232
Iterating global reduction 17 with 19 rules applied. Total rules applied 3638 place count 93 transition count 232
Ensure Unique test removed 8 transitions
Reduce isomorphic transitions removed 8 transitions.
Iterating post reduction 17 with 8 rules applied. Total rules applied 3646 place count 93 transition count 224
Discarding 3 places :
Symmetric choice reduction at 18 with 3 rule applications. Total rules 3649 place count 90 transition count 218
Iterating global reduction 18 with 3 rules applied. Total rules applied 3652 place count 90 transition count 218
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 18 with 2 rules applied. Total rules applied 3654 place count 90 transition count 216
Drop transitions removed 17 transitions
Redundant transition composition rules discarded 17 transitions
Iterating global reduction 19 with 17 rules applied. Total rules applied 3671 place count 90 transition count 199
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 1 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 19 with 2 rules applied. Total rules applied 3673 place count 89 transition count 198
Free-agglomeration rule applied 9 times.
Iterating global reduction 19 with 9 rules applied. Total rules applied 3682 place count 89 transition count 189
Reduce places removed 9 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 19 with 10 rules applied. Total rules applied 3692 place count 80 transition count 188
Partial Free-agglomeration rule applied 4 times.
Drop transitions removed 4 transitions
Iterating global reduction 20 with 4 rules applied. Total rules applied 3696 place count 80 transition count 188
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 20 with 1 rules applied. Total rules applied 3697 place count 80 transition count 187
Discarding 1 places :
Symmetric choice reduction at 20 with 1 rule applications. Total rules 3698 place count 79 transition count 186
Iterating global reduction 20 with 1 rules applied. Total rules applied 3699 place count 79 transition count 186
Partial Post-agglomeration rule applied 1 times.
Drop transitions removed 1 transitions
Iterating global reduction 20 with 1 rules applied. Total rules applied 3700 place count 79 transition count 186
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 20 with 1 rules applied. Total rules applied 3701 place count 78 transition count 185
Applied a total of 3701 rules in 284 ms. Remains 78 /2585 variables (removed 2507) and now considering 185/3095 (removed 2910) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 286 ms. Remains : 78/2585 places, 185/3095 transitions.
Incomplete random walk after 10000 steps, including 127 resets, run finished after 105 ms. (steps per millisecond=95 ) properties (out of 5) seen :3
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-12 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-06 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 37 resets, run finished after 33 ms. (steps per millisecond=303 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 39 resets, run finished after 30 ms. (steps per millisecond=333 ) properties (out of 2) seen :0
Running SMT prover for 2 properties.
[2023-03-08 07:55:53] [INFO ] Flow matrix only has 174 transitions (discarded 11 similar events)
// Phase 1: matrix 174 rows 78 cols
[2023-03-08 07:55:53] [INFO ] Computed 3 place invariants in 1 ms
[2023-03-08 07:55:53] [INFO ] After 37ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-08 07:55:53] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2023-03-08 07:55:53] [INFO ] After 48ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :2
[2023-03-08 07:55:53] [INFO ] State equation strengthened by 4 read => feed constraints.
[2023-03-08 07:55:53] [INFO ] After 20ms SMT Verify possible using 4 Read/Feed constraints in natural domain returned unsat :0 sat :2
[2023-03-08 07:55:53] [INFO ] Deduced a trap composed of 22 places in 56 ms of which 1 ms to minimize.
[2023-03-08 07:55:53] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 69 ms
[2023-03-08 07:55:54] [INFO ] After 129ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :2
Attempting to minimize the solution found.
Minimization took 17 ms.
[2023-03-08 07:55:54] [INFO ] After 232ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :2
Parikh walk visited 0 properties in 2 ms.
Support contains 15 out of 78 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 78/78 places, 185/185 transitions.
Graph (trivial) has 19 edges and 78 vertex of which 6 / 78 are part of one of the 3 SCC in 0 ms
Free SCC test removed 3 places
Drop transitions removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
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 0 with 4 rules applied. Total rules applied 5 place count 73 transition count 177
Drop transitions removed 4 transitions
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 10 place count 73 transition count 172
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 11 place count 72 transition count 170
Iterating global reduction 1 with 1 rules applied. Total rules applied 12 place count 72 transition count 170
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 13 place count 72 transition count 169
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 0
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 15 place count 71 transition count 169
Drop transitions removed 1 transitions
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 2 with 2 rules applied. Total rules applied 17 place count 71 transition count 167
Discarding 1 places :
Symmetric choice reduction at 3 with 1 rule applications. Total rules 18 place count 70 transition count 165
Iterating global reduction 3 with 1 rules applied. Total rules applied 19 place count 70 transition count 165
Drop transitions removed 10 transitions
Redundant transition composition rules discarded 10 transitions
Iterating global reduction 3 with 10 rules applied. Total rules applied 29 place count 70 transition count 155
Discarding 1 places :
Symmetric choice reduction at 3 with 1 rule applications. Total rules 30 place count 69 transition count 152
Iterating global reduction 3 with 1 rules applied. Total rules applied 31 place count 69 transition count 152
Discarding 1 places :
Symmetric choice reduction at 3 with 1 rule applications. Total rules 32 place count 68 transition count 151
Iterating global reduction 3 with 1 rules applied. Total rules applied 33 place count 68 transition count 151
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 34 place count 68 transition count 150
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 4 with 1 rules applied. Total rules applied 35 place count 68 transition count 149
Free-agglomeration rule applied 1 times.
Iterating global reduction 4 with 1 rules applied. Total rules applied 36 place count 68 transition count 148
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 4 with 1 rules applied. Total rules applied 37 place count 67 transition count 148
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 5 with 1 rules applied. Total rules applied 38 place count 67 transition count 147
Applied a total of 38 rules in 45 ms. Remains 67 /78 variables (removed 11) and now considering 147/185 (removed 38) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45 ms. Remains : 67/78 places, 147/185 transitions.
Incomplete random walk after 10000 steps, including 149 resets, run finished after 62 ms. (steps per millisecond=161 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 40 resets, run finished after 6 ms. (steps per millisecond=1666 ) properties (out of 2) seen :1
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-04 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 41 resets, run finished after 8 ms. (steps per millisecond=1250 ) properties (out of 1) seen :0
Running SMT prover for 1 properties.
[2023-03-08 07:55:54] [INFO ] Flow matrix only has 139 transitions (discarded 8 similar events)
// Phase 1: matrix 139 rows 67 cols
[2023-03-08 07:55:54] [INFO ] Computed 3 place invariants in 3 ms
[2023-03-08 07:55:54] [INFO ] After 27ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2023-03-08 07:55:54] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2023-03-08 07:55:54] [INFO ] After 38ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2023-03-08 07:55:54] [INFO ] State equation strengthened by 3 read => feed constraints.
[2023-03-08 07:55:54] [INFO ] After 10ms SMT Verify possible using 3 Read/Feed constraints in natural domain returned unsat :0 sat :1
[2023-03-08 07:55:54] [INFO ] Deduced a trap composed of 15 places in 39 ms of which 1 ms to minimize.
[2023-03-08 07:55:54] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 47 ms
[2023-03-08 07:55:54] [INFO ] After 72ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
Attempting to minimize the solution found.
Minimization took 9 ms.
[2023-03-08 07:55:54] [INFO ] After 151ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Parikh walk visited 0 properties in 0 ms.
Support contains 13 out of 67 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 67/67 places, 147/147 transitions.
Graph (trivial) has 14 edges and 67 vertex of which 2 / 67 are part of one of the 1 SCC in 0 ms
Free SCC test removed 1 places
Drop transitions removed 2 transitions
Reduce isomorphic transitions removed 2 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 0 with 1 rules applied. Total rules applied 2 place count 66 transition count 144
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 3 place count 65 transition count 144
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 5 place count 64 transition count 143
Drop transitions removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 6 place count 64 transition count 142
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 8 place count 63 transition count 142
Drop transitions removed 1 transitions
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 3 with 2 rules applied. Total rules applied 10 place count 63 transition count 140
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 4 with 1 rules applied. Total rules applied 11 place count 63 transition count 139
Free-agglomeration rule applied 1 times.
Iterating global reduction 4 with 1 rules applied. Total rules applied 12 place count 63 transition count 138
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 4 with 1 rules applied. Total rules applied 13 place count 62 transition count 138
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 5 with 1 rules applied. Total rules applied 14 place count 62 transition count 137
Applied a total of 14 rules in 22 ms. Remains 62 /67 variables (removed 5) and now considering 137/147 (removed 10) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 22 ms. Remains : 62/67 places, 137/147 transitions.
Incomplete random walk after 10000 steps, including 152 resets, run finished after 15 ms. (steps per millisecond=666 ) properties (out of 1) seen :0
Incomplete Best-First random walk after 10001 steps, including 44 resets, run finished after 9 ms. (steps per millisecond=1111 ) properties (out of 1) seen :0
Finished probabilistic random walk after 22658 steps, run visited all 1 properties in 59 ms. (steps per millisecond=384 )
Probabilistic random walk after 22658 steps, saw 6151 distinct states, run finished after 59 ms. (steps per millisecond=384 ) properties seen :1
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-09 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
All properties solved without resorting to model-checking.
Total runtime 11738 ms.
pnml2lts-sym model.pnml --lace-workers=4 --vset=lddmc --saturation=sat -rbs,w2W,ru,hf --sylvan-sizes=20,28,20,28 --inv-bin-par --invariant=/tmp/479/inv_0_ --invariant=/tmp/479/inv_1_ --invariant=/tmp/479/inv_2_ --invariant=/tmp/479/inv_3_ --invariant=/tmp/479/inv_4_ --invariant=/tmp/479/inv_5_ --invariant=/tmp/479/inv_6_ --invariant=/tmp/479/inv_7_ --invariant=/tmp/479/inv_8_ --invariant=/tmp/479/inv_9_ --invariant=/tmp/479/inv_10_ --invariant=/tmp/479/inv_11_ --invariant=/tmp/479/inv_12_ --invariant=/tmp/479/inv_13_ --invariant=/tmp/479/inv_14_ --invariant=/tmp/479/inv_15_ --inv-par
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-00 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-01 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-02 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-03 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-04 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-05 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-06 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-07 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-08 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-09 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-10 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-11 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-12 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-13 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-14 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN
FORMULA CloudReconfiguration-PT-316-ReachabilityFireability-15 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING USE_NUPN

BK_STOP 1678262187694

--------------------
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 ReachabilityFireability -timeout 360 -rebuildPNML
mcc2023
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-00
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_0_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-01
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_1_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-02
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_2_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-03
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_3_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-04
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_4_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-05
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_5_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-06
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_6_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-07
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_7_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-08
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_8_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-09
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_9_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-10
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_10_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-11
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_11_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-12
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_12_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-13
rfs formula type AG
rfs formula formula --invariant=/tmp/479/inv_13_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-14
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_14_
rfs formula name CloudReconfiguration-PT-316-ReachabilityFireability-15
rfs formula type EF
rfs formula formula --invariant=/tmp/479/inv_15_
pnml2lts-sym: Exploration order is bfs-prev
pnml2lts-sym: Saturation strategy is sat
pnml2lts-sym: Guided search strategy is unguided
pnml2lts-sym: Attractor strategy is default
pnml2lts-sym: opening model.pnml
pnml2lts-sym: Edge label is id
Warning: program compiled against libxml 210 using older 209
pnml2lts-sym: Petri net has 2585 places, 3095 transitions and 6463 arcs
pnml2lts-sym: Petri net CloudReconfiguration-PT-316 analyzed
pnml2lts-sym: There are safe places
pnml2lts-sym: Loading Petri net took 0.030 real 0.020 user 0.010 sys
pnml2lts-sym: Initializing regrouping layer
pnml2lts-sym: Regroup specification: bs,w2W,ru,hf
pnml2lts-sym: Regroup Boost's Sloan
pnml2lts-sym: Regroup over-approximate must-write to may-write
pnml2lts-sym: Regroup Row sUbsume
pnml2lts-sym: Reqroup Horizontal Flip
pnml2lts-sym: Regrouping: 3095->3095 groups
pnml2lts-sym: Regrouping took 2.800 real 2.790 user 0.000 sys
pnml2lts-sym: state vector length is 2585; there are 3095 groups
pnml2lts-sym: Creating a multi-core ListDD domain.
pnml2lts-sym: Sylvan allocates 15.000 GB virtual memory for nodes table and operation cache.
pnml2lts-sym: Initial nodes table and operation cache requires 60.00 MB.
pnml2lts-sym: Using GBgetTransitionsShortR2W as next-state function
pnml2lts-sym: got initial state
pnml2lts-sym: vset_sylvan: starting garbage collection
pnml2lts-sym: vset_sylvan: garbage collection done
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_0_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_4_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_5_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_11_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_12_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_13_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_10_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_9_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_8_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym:
pnml2lts-sym: Invariant violation (/tmp/479/inv_6_) found at depth -1!
pnml2lts-sym:
pnml2lts-sym: Exploration took 1436840 group checks and 0 next state calls
pnml2lts-sym: reachability took 27.200 real 108.510 user 0.100 sys
pnml2lts-sym: counting visited states...
pnml2lts-sym: counting took 0.020 real 0.110 user 0.000 sys
pnml2lts-sym: state space has 131394296458 states, 95571 nodes
pnml2lts-sym: group_next: 12417 nodes total
pnml2lts-sym: group_explored: 6378 nodes, 6392 short vectors total
pnml2lts-sym: max token count: 1

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="CloudReconfiguration-PT-316"
export BK_EXAMINATION="ReachabilityFireability"
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 CloudReconfiguration-PT-316, examination is ReachabilityFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r105-tall-167814480800127"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CloudReconfiguration-PT-316.tgz
mv CloudReconfiguration-PT-316 execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityFireability.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;