About the Execution of LTSMin+red for SieveSingleMsgMbox-PT-d0m18
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
593.888 | 25047.00 | 52129.00 | 176.40 | ?TTFFTFTT?TFFFTF | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2024-input.r532-smll-171683810600017.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-5568
Executing tool ltsminxred
Input is SieveSingleMsgMbox-PT-d0m18, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r532-smll-171683810600017
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 500K
-rw-r--r-- 1 mcc users 7.1K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 77K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.9K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 68K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.7K Apr 23 07:56 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Apr 23 07:56 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Apr 23 07:56 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Apr 23 07:56 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.1K Apr 12 19:16 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 78K Apr 12 19:16 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Apr 12 19:15 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 93K Apr 12 19:15 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Apr 23 07:56 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Apr 23 07:56 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:43 equiv_col
-rw-r--r-- 1 mcc users 6 May 18 16:43 instance
-rw-r--r-- 1 mcc users 6 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 57K May 18 16:43 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 SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-00
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-01
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-02
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-03
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-04
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-05
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-06
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-07
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-08
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-09
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-10
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-11
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-12
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-13
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-14
FORMULA_NAME SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-15
=== Now, execution of the tool begins
BK_START 1717241704244
Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=CTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=SieveSingleMsgMbox-PT-d0m18
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202405141337
[2024-06-01 11:35:06] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -timeout, 360, -rebuildPNML]
[2024-06-01 11:35:06] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-06-01 11:35:07] [INFO ] Load time of PNML (sax parser for PT used): 144 ms
[2024-06-01 11:35:07] [INFO ] Transformed 262 places.
[2024-06-01 11:35:07] [INFO ] Transformed 73 transitions.
[2024-06-01 11:35:07] [INFO ] Parsed PT model containing 262 places and 73 transitions and 292 arcs in 376 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 37 ms.
Deduced a syphon composed of 190 places in 4 ms
Reduce places removed 190 places and 0 transitions.
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-14 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-15 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 5 out of 72 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 72/72 places, 73/73 transitions.
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 2 place count 70 transition count 73
Discarding 6 places :
Symmetric choice reduction at 1 with 6 rule applications. Total rules 8 place count 64 transition count 67
Iterating global reduction 1 with 6 rules applied. Total rules applied 14 place count 64 transition count 67
Applied a total of 14 rules in 52 ms. Remains 64 /72 variables (removed 8) and now considering 67/73 (removed 6) transitions.
// Phase 1: matrix 67 rows 64 cols
[2024-06-01 11:35:07] [INFO ] Computed 5 invariants in 23 ms
[2024-06-01 11:35:08] [INFO ] Implicit Places using invariants in 522 ms returned []
[2024-06-01 11:35:08] [INFO ] Invariant cache hit.
[2024-06-01 11:35:08] [INFO ] State equation strengthened by 27 read => feed constraints.
[2024-06-01 11:35:08] [INFO ] Implicit Places using invariants and state equation in 361 ms returned []
Implicit Place search using SMT with State Equation took 948 ms to find 0 implicit places.
Running 66 sub problems to find dead transitions.
[2024-06-01 11:35:08] [INFO ] Invariant cache hit.
[2024-06-01 11:35:08] [INFO ] State equation strengthened by 27 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/63 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/63 variables, 3/4 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/63 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 3 (OVERLAPS) 1/64 variables, 1/5 constraints. Problems are: Problem set: 0 solved, 66 unsolved
[2024-06-01 11:35:10] [INFO ] Deduced a trap composed of 21 places in 114 ms of which 25 ms to minimize.
[2024-06-01 11:35:10] [INFO ] Deduced a trap composed of 21 places in 57 ms of which 2 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/64 variables, 2/7 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/64 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 6 (OVERLAPS) 67/131 variables, 64/71 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/131 variables, 27/98 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/131 variables, 0/98 constraints. Problems are: Problem set: 0 solved, 66 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (OVERLAPS) 0/131 variables, 0/98 constraints. Problems are: Problem set: 0 solved, 66 unsolved
No progress, stopping.
After SMT solving in domain Real declared 131/131 variables, and 98 constraints, problems are : Problem set: 0 solved, 66 unsolved in 3470 ms.
Refiners :[Positive P Invariants (semi-flows): 2/2 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 64/64 constraints, ReadFeed: 27/27 constraints, PredecessorRefiner: 66/66 constraints, Known Traps: 2/2 constraints]
Escalating to Integer solving :Problem set: 0 solved, 66 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/63 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/63 variables, 3/4 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/63 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 3 (OVERLAPS) 1/64 variables, 1/5 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/64 variables, 2/7 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/64 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 6 (OVERLAPS) 67/131 variables, 64/71 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/131 variables, 27/98 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/131 variables, 66/164 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/131 variables, 0/164 constraints. Problems are: Problem set: 0 solved, 66 unsolved
At refinement iteration 10 (OVERLAPS) 0/131 variables, 0/164 constraints. Problems are: Problem set: 0 solved, 66 unsolved
No progress, stopping.
After SMT solving in domain Int declared 131/131 variables, and 164 constraints, problems are : Problem set: 0 solved, 66 unsolved in 3076 ms.
Refiners :[Positive P Invariants (semi-flows): 2/2 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 64/64 constraints, ReadFeed: 27/27 constraints, PredecessorRefiner: 66/66 constraints, Known Traps: 2/2 constraints]
After SMT, in 6831ms problems are : Problem set: 0 solved, 66 unsolved
Search for dead transitions found 0 dead transitions in 6855ms
Starting structural reductions in LTL mode, iteration 1 : 64/72 places, 67/73 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 7919 ms. Remains : 64/72 places, 67/73 transitions.
Support contains 5 out of 64 places after structural reductions.
[2024-06-01 11:35:15] [INFO ] Initial state reduction rules for CTL removed 5 formulas.
[2024-06-01 11:35:15] [INFO ] Flatten gal took : 55 ms
[2024-06-01 11:35:15] [INFO ] Initial state reduction rules for CTL removed 3 formulas.
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2023-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-01 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-06-01 11:35:15] [INFO ] Flatten gal took : 28 ms
[2024-06-01 11:35:15] [INFO ] Input system was already deterministic with 67 transitions.
Support contains 3 out of 64 places (down from 5) after GAL structural reductions.
FORMULA SieveSingleMsgMbox-PT-d0m18-CTLCardinality-2024-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 40000 steps (8879 resets) in 1502 ms. (26 steps per ms) remains 3/3 properties
BEST_FIRST walk for 40003 steps (4115 resets) in 1055 ms. (37 steps per ms) remains 3/3 properties
BEST_FIRST walk for 40002 steps (4161 resets) in 365 ms. (109 steps per ms) remains 3/3 properties
BEST_FIRST walk for 40002 steps (4151 resets) in 105 ms. (377 steps per ms) remains 3/3 properties
Interrupted probabilistic random walk after 760566 steps, run timeout after 3001 ms. (steps per millisecond=253 ) properties seen :0 out of 3
Probabilistic random walk after 760566 steps, saw 339099 distinct states, run finished after 3008 ms. (steps per millisecond=252 ) properties seen :0
[2024-06-01 11:35:19] [INFO ] Invariant cache hit.
[2024-06-01 11:35:19] [INFO ] State equation strengthened by 27 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/3 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 3 unsolved
Problem AtomicPropp1 is UNSAT
At refinement iteration 1 (OVERLAPS) 35/38 variables, 2/2 constraints. Problems are: Problem set: 1 solved, 2 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/2 constraints. Problems are: Problem set: 1 solved, 2 unsolved
Problem AtomicPropp2 is UNSAT
At refinement iteration 3 (OVERLAPS) 14/52 variables, 3/5 constraints. Problems are: Problem set: 2 solved, 1 unsolved
[2024-06-01 11:35:19] [INFO ] Deduced a trap composed of 13 places in 45 ms of which 1 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/52 variables, 1/6 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/52 variables, 0/6 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 58/110 variables, 52/58 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/110 variables, 18/76 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/110 variables, 0/76 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 21/131 variables, 12/88 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/131 variables, 9/97 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/131 variables, 0/97 constraints. Problems are: Problem set: 2 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (OVERLAPS) 0/131 variables, 0/97 constraints. Problems are: Problem set: 2 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 131/131 variables, and 97 constraints, problems are : Problem set: 2 solved, 1 unsolved in 160 ms.
Refiners :[Positive P Invariants (semi-flows): 2/2 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 64/64 constraints, ReadFeed: 27/27 constraints, PredecessorRefiner: 3/3 constraints, Known Traps: 1/1 constraints]
Escalating to Integer solving :Problem set: 2 solved, 1 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 29/30 variables, 1/1 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/30 variables, 0/1 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 8/38 variables, 1/2 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/38 variables, 0/2 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 14/52 variables, 3/5 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/52 variables, 1/6 constraints. Problems are: Problem set: 2 solved, 1 unsolved
[2024-06-01 11:35:20] [INFO ] Deduced a trap composed of 12 places in 49 ms of which 2 ms to minimize.
At refinement iteration 7 (INCLUDED_ONLY) 0/52 variables, 1/7 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/52 variables, 0/7 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 58/110 variables, 52/59 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/110 variables, 18/77 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/110 variables, 1/78 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/110 variables, 0/78 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 21/131 variables, 12/90 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/131 variables, 9/99 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/131 variables, 0/99 constraints. Problems are: Problem set: 2 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 0/131 variables, 0/99 constraints. Problems are: Problem set: 2 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 131/131 variables, and 99 constraints, problems are : Problem set: 2 solved, 1 unsolved in 171 ms.
Refiners :[Positive P Invariants (semi-flows): 2/2 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 64/64 constraints, ReadFeed: 27/27 constraints, PredecessorRefiner: 1/3 constraints, Known Traps: 2/2 constraints]
After SMT, in 342ms problems are : Problem set: 2 solved, 1 unsolved
Parikh walk visited 0 properties in 136 ms.
Support contains 1 out of 64 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 64/64 places, 67/67 transitions.
Graph (complete) has 177 edges and 64 vertex of which 63 are kept as prefixes of interest. Removing 1 places using SCC suffix rule.2 ms
Discarding 1 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 3 place count 63 transition count 65
Discarding 3 places :
Symmetric choice reduction at 1 with 3 rule applications. Total rules 6 place count 60 transition count 62
Iterating global reduction 1 with 3 rules applied. Total rules applied 9 place count 60 transition count 62
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 10 place count 59 transition count 61
Iterating global reduction 1 with 1 rules applied. Total rules applied 11 place count 59 transition count 61
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 12 place count 58 transition count 60
Iterating global reduction 1 with 1 rules applied. Total rules applied 13 place count 58 transition count 60
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 14 place count 58 transition count 59
Applied a total of 14 rules in 42 ms. Remains 58 /64 variables (removed 6) and now considering 59/67 (removed 8) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 42 ms. Remains : 58/64 places, 59/67 transitions.
RANDOM walk for 40000 steps (9025 resets) in 117 ms. (338 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40002 steps (4129 resets) in 76 ms. (519 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 2994852 steps, run timeout after 3001 ms. (steps per millisecond=997 ) properties seen :0 out of 1
Probabilistic random walk after 2994852 steps, saw 1259193 distinct states, run finished after 3001 ms. (steps per millisecond=997 ) properties seen :0
// Phase 1: matrix 59 rows 58 cols
[2024-06-01 11:35:23] [INFO ] Computed 4 invariants in 3 ms
[2024-06-01 11:35:23] [INFO ] State equation strengthened by 23 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 27/28 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/28 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 10/38 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
[2024-06-01 11:35:23] [INFO ] Deduced a trap composed of 20 places in 31 ms of which 1 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/38 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/38 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 2/40 variables, 1/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/40 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 44/84 variables, 40/45 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/84 variables, 0/45 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 19/103 variables, 11/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/103 variables, 16/72 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (INCLUDED_ONLY) 0/103 variables, 0/72 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 14/117 variables, 7/79 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/117 variables, 7/86 constraints. Problems are: Problem set: 0 solved, 1 unsolved
[2024-06-01 11:35:23] [INFO ] Deduced a trap composed of 13 places in 66 ms of which 1 ms to minimize.
At refinement iteration 15 (INCLUDED_ONLY) 0/117 variables, 1/87 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/117 variables, 0/87 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 0/117 variables, 0/87 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 117/117 variables, and 87 constraints, problems are : Problem set: 0 solved, 1 unsolved in 257 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, Generalized P Invariants (flows): 1/1 constraints, State Equation: 58/58 constraints, ReadFeed: 23/23 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 2/2 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 27/28 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/28 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 10/38 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/38 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/38 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 2/40 variables, 1/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/40 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 44/84 variables, 40/45 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/84 variables, 0/45 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 19/103 variables, 11/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/103 variables, 16/72 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/103 variables, 1/73 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/103 variables, 1/74 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/103 variables, 0/74 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/117 variables, 7/81 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/117 variables, 7/88 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/117 variables, 0/88 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 0/117 variables, 0/88 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 117/117 variables, and 88 constraints, problems are : Problem set: 0 solved, 1 unsolved in 137 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, Generalized P Invariants (flows): 1/1 constraints, State Equation: 58/58 constraints, ReadFeed: 23/23 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 2/2 constraints]
After SMT, in 408ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 83 ms.
Support contains 1 out of 58 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 58/58 places, 59/59 transitions.
Applied a total of 0 rules in 13 ms. Remains 58 /58 variables (removed 0) and now considering 59/59 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 13 ms. Remains : 58/58 places, 59/59 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 58/58 places, 59/59 transitions.
Applied a total of 0 rules in 9 ms. Remains 58 /58 variables (removed 0) and now considering 59/59 (removed 0) transitions.
[2024-06-01 11:35:23] [INFO ] Invariant cache hit.
[2024-06-01 11:35:23] [INFO ] Implicit Places using invariants in 95 ms returned []
[2024-06-01 11:35:23] [INFO ] Invariant cache hit.
[2024-06-01 11:35:24] [INFO ] State equation strengthened by 23 read => feed constraints.
[2024-06-01 11:35:24] [INFO ] Implicit Places using invariants and state equation in 140 ms returned []
Implicit Place search using SMT with State Equation took 239 ms to find 0 implicit places.
[2024-06-01 11:35:24] [INFO ] Redundant transitions in 1 ms returned []
Running 58 sub problems to find dead transitions.
[2024-06-01 11:35:24] [INFO ] Invariant cache hit.
[2024-06-01 11:35:24] [INFO ] State equation strengthened by 23 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/57 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/57 variables, 1/2 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/57 variables, 0/2 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 3 (OVERLAPS) 1/58 variables, 2/4 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/58 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 5 (OVERLAPS) 59/117 variables, 58/62 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/117 variables, 23/85 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/117 variables, 0/85 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 8 (OVERLAPS) 0/117 variables, 0/85 constraints. Problems are: Problem set: 0 solved, 58 unsolved
No progress, stopping.
After SMT solving in domain Real declared 117/117 variables, and 85 constraints, problems are : Problem set: 0 solved, 58 unsolved in 1310 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, Generalized P Invariants (flows): 1/1 constraints, State Equation: 58/58 constraints, ReadFeed: 23/23 constraints, PredecessorRefiner: 58/58 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 58 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/57 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/57 variables, 1/2 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/57 variables, 0/2 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 3 (OVERLAPS) 1/58 variables, 2/4 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/58 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 5 (OVERLAPS) 59/117 variables, 58/62 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/117 variables, 23/85 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/117 variables, 58/143 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/117 variables, 0/143 constraints. Problems are: Problem set: 0 solved, 58 unsolved
At refinement iteration 9 (OVERLAPS) 0/117 variables, 0/143 constraints. Problems are: Problem set: 0 solved, 58 unsolved
No progress, stopping.
After SMT solving in domain Int declared 117/117 variables, and 143 constraints, problems are : Problem set: 0 solved, 58 unsolved in 2804 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, Generalized P Invariants (flows): 1/1 constraints, State Equation: 58/58 constraints, ReadFeed: 23/23 constraints, PredecessorRefiner: 58/58 constraints, Known Traps: 0/0 constraints]
After SMT, in 4199ms problems are : Problem set: 0 solved, 58 unsolved
Search for dead transitions found 0 dead transitions in 4200ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4455 ms. Remains : 58/58 places, 59/59 transitions.
Attempting over-approximation, by ignoring read arcs.
Drop transitions (Empty/Sink Transition effects.) removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 3 rules applied. Total rules applied 3 place count 58 transition count 56
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 4 place count 57 transition count 56
Performed 10 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 10 Pre rules applied. Total rules applied 4 place count 57 transition count 46
Deduced a syphon composed of 10 places in 0 ms
Reduce places removed 10 places and 0 transitions.
Iterating global reduction 2 with 20 rules applied. Total rules applied 24 place count 47 transition count 46
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 2 with 2 rules applied. Total rules applied 26 place count 46 transition count 45
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 3 places in 0 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 2 with 6 rules applied. Total rules applied 32 place count 43 transition count 45
Applied a total of 32 rules in 28 ms. Remains 43 /58 variables (removed 15) and now considering 45/59 (removed 14) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 45 rows 43 cols
[2024-06-01 11:35:28] [INFO ] Computed 6 invariants in 3 ms
[2024-06-01 11:35:28] [INFO ] [Real]Absence check using 3 positive place invariants in 2 ms returned sat
[2024-06-01 11:35:28] [INFO ] [Real]Absence check using 3 positive and 3 generalized place invariants in 3 ms returned sat
[2024-06-01 11:35:28] [INFO ] After 96ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
[2024-06-01 11:35:28] [INFO ] [Nat]Absence check using 3 positive place invariants in 2 ms returned sat
[2024-06-01 11:35:28] [INFO ] [Nat]Absence check using 3 positive and 3 generalized place invariants in 2 ms returned sat
[2024-06-01 11:35:28] [INFO ] After 38ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2024-06-01 11:35:28] [INFO ] Deduced a trap composed of 11 places in 47 ms of which 1 ms to minimize.
[2024-06-01 11:35:28] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 58 ms
TRAPS : Iteration 1
[2024-06-01 11:35:28] [INFO ] After 118ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2024-06-01 11:35:28] [INFO ] After 167ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 314 ms.
Successfully simplified 2 atomic propositions for a total of 1 simplifications.
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 13 ms
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 14 ms
[2024-06-01 11:35:28] [INFO ] Input system was already deterministic with 67 transitions.
Computed a total of 7 stabilizing places and 10 stable transitions
Graph (complete) has 199 edges and 64 vertex of which 63 are kept as prefixes of interest. Removing 1 places using SCC suffix rule.3 ms
Starting structural reductions in LTL mode, iteration 0 : 64/64 places, 67/67 transitions.
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 3 place count 61 transition count 64
Iterating global reduction 0 with 3 rules applied. Total rules applied 6 place count 61 transition count 64
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 7 place count 60 transition count 63
Iterating global reduction 0 with 1 rules applied. Total rules applied 8 place count 60 transition count 63
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 9 place count 59 transition count 62
Iterating global reduction 0 with 1 rules applied. Total rules applied 10 place count 59 transition count 62
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 11 place count 59 transition count 61
Applied a total of 11 rules in 20 ms. Remains 59 /64 variables (removed 5) and now considering 61/67 (removed 6) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 22 ms. Remains : 59/64 places, 61/67 transitions.
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 10 ms
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 10 ms
[2024-06-01 11:35:28] [INFO ] Input system was already deterministic with 61 transitions.
Starting structural reductions in LTL mode, iteration 0 : 64/64 places, 67/67 transitions.
Discarding 3 places :
Symmetric choice reduction at 0 with 3 rule applications. Total rules 3 place count 61 transition count 64
Iterating global reduction 0 with 3 rules applied. Total rules applied 6 place count 61 transition count 64
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 7 place count 60 transition count 63
Iterating global reduction 0 with 1 rules applied. Total rules applied 8 place count 60 transition count 63
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 9 place count 59 transition count 62
Iterating global reduction 0 with 1 rules applied. Total rules applied 10 place count 59 transition count 62
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 11 place count 59 transition count 61
Applied a total of 11 rules in 19 ms. Remains 59 /64 variables (removed 5) and now considering 61/67 (removed 6) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 20 ms. Remains : 59/64 places, 61/67 transitions.
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 9 ms
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 9 ms
[2024-06-01 11:35:28] [INFO ] Input system was already deterministic with 61 transitions.
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 10 ms
[2024-06-01 11:35:28] [INFO ] Flatten gal took : 10 ms
[2024-06-01 11:35:28] [INFO ] Export to MCC of 2 properties in file /home/mcc/execution/CTLCardinality.sr.xml took 3 ms.
[2024-06-01 11:35:28] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 64 places, 67 transitions and 265 arcs took 4 ms.
Total runtime 22139 ms.
There are residual formulas that ITS could not solve within timeout
Usage: pnml2lts-sym [-gvqh] [--order=
[--mu-opt] [--saturation=
[--sat-granularity=
[--guidance=
[--action=
[--trace=
[--mu=
[--ctl=
[--save-levels=STRING] [--pg-solve] [--attr=
[--saturating-attractor] [--write-strategy=
[--check-strategy] [--interactive-play] [--player]
[--pg-write=
[--edge-label=
[--mucalc=
[--allow-undefined-edges] [--allow-undefined-values]
[-p|--por=
[--weak=[valmari] (default: uses stronger left-commutativity)]
[--leap] [-r|--regroup=<(T,)+>] [--sloan-w1=
[--cw-max-cols=
[--mh-timeout=
[--graph-metrics] [--regroup-exit] [--regroup-time]
[-g|--pins-guards] [--vset=
[--ldd32-cache=
[--cache-ratio=
[--min-free-nodes=
[--fdd-reorder=
[--vset-cache-diff=
[--next-union] [--peak-nodes] [--maxsum=
[--block-size=
[--debug=
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="SieveSingleMsgMbox-PT-d0m18"
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 2-5568"
echo " Executing tool ltsminxred"
echo " Input is SieveSingleMsgMbox-PT-d0m18, 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 r532-smll-171683810600017"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/SieveSingleMsgMbox-PT-d0m18.tgz
mv SieveSingleMsgMbox-PT-d0m18 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 '
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 ;