Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2024-input.r472-tajo-171620398800103.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2024-input.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.........................
=====================================================================
Generated by BenchKit 2-5568
Executing tool ltsminxred
Input is BridgeAndVehicles-COL-V50P50N20, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r472-tajo-171620398800103
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 504K
-rw-r--r-- 1 mcc users 6.0K Apr 13 02:08 CTLCardinality.txt
-rw-r--r-- 1 mcc users 52K Apr 13 02:08 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.7K Apr 13 02:04 CTLFireability.txt
-rw-r--r-- 1 mcc users 53K Apr 13 02:04 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:42 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K May 18 16:42 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.9K Apr 22 14:30 LTLCardinality.txt
-rw-r--r-- 1 mcc users 31K Apr 22 14:30 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.8K Apr 22 14:30 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Apr 22 14:30 LTLFireability.xml
-rw-r--r-- 1 mcc users 11K Apr 13 03:22 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 99K Apr 13 03:22 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 15K Apr 13 03:18 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 107K Apr 13 03:18 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Apr 22 14:30 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K Apr 22 14:30 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 18 16:42 equiv_pt
-rw-r--r-- 1 mcc users 10 May 18 16:42 instance
-rw-r--r-- 1 mcc users 5 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 42K May 18 16:42 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 BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-00
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-01
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-02
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-03
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-04
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-05
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-06
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-07
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-08
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-09
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-10
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-11
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-12
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-13
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-14
FORMULA_NAME BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-15

=== Now, execution of the tool begins

BK_START 1717218941053

Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=BridgeAndVehicles-COL-V50P50N20
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202405141337
[2024-06-01 05:15:42] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2024-06-01 05:15:42] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-06-01 05:15:42] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
log4j:WARN No appenders could be found for logger (org.apache.axiom.locator.DefaultOMMetaFactoryLocator).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[2024-06-01 05:15:42] [WARNING] Using fallBack plugin, rng conformance not checked
[2024-06-01 05:15:42] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 577 ms
[2024-06-01 05:15:42] [INFO ] Imported 15 HL places and 11 HL transitions for a total of 138 PT places and 218878.0 transition bindings in 19 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 26 ms.
Reduction of identical properties reduced properties to check from 16 to 15
Working with output stream class java.io.PrintStream
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-14 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-06-01 05:15:43] [INFO ] Built PT skeleton of HLPN with 15 places and 11 transitions 56 arcs in 5 ms.
[2024-06-01 05:15:43] [INFO ] Skeletonized 13 HLPN properties in 0 ms.
Remains 2 properties that can be checked using skeleton over-approximation.
Reduce places removed 3 places and 0 transitions.
Computed a total of 9 stabilizing places and 6 stable transitions
Graph (complete) has 22 edges and 12 vertex of which 10 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.1 ms
Initial state reduction rules removed 1 formulas.
Ensure Unique test removed 1 transitions
Reduce redundant transitions removed 1 transitions.
RANDOM walk for 495 steps (0 resets) in 10 ms. (45 steps per ms) remains 0/1 properties
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
[2024-06-01 05:15:43] [INFO ] Flatten gal took : 13 ms
[2024-06-01 05:15:43] [INFO ] Flatten gal took : 2 ms
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
Arc [1:1*[(MOD (ADD $cA 1) 51)]] contains successor/predecessor on variables of sort voitureA
Arc [6:1*[(MOD (ADD (MOD (MINUS $cB 1) 51) 51) 51)]] contains successor/predecessor on variables of sort voitureB
Arc [13:1*[(MOD (ADD $cpt 1) 21)]] contains successor/predecessor on variables of sort compteur
Arc [14:1*[(MOD (ADD $s 1) 2)]] contains successor/predecessor on variables of sort sens
[2024-06-01 05:15:43] [INFO ] Unfolded HLPN to a Petri net with 138 places and 2348 transitions 18090 arcs in 112 ms.
[2024-06-01 05:15:43] [INFO ] Unfolded 13 HLPN properties in 4 ms.
RANDOM walk for 40000 steps (92 resets) in 6783 ms. (5 steps per ms) remains 5/13 properties
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-15 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-13 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-12 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-11 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-09 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-01 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40003 steps (29 resets) in 1956 ms. (20 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40002 steps (36 resets) in 15228 ms. (2 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40002 steps (38 resets) in 10232 ms. (3 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40002 steps (31 resets) in 8228 ms. (4 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40001 steps (40 resets) in 5208 ms. (7 steps per ms) remains 5/5 properties
[2024-06-01 05:15:56] [INFO ] Flow matrix only has 290 transitions (discarded 2058 similar events)
// Phase 1: matrix 290 rows 138 cols
[2024-06-01 05:15:56] [INFO ] Computed 7 invariants in 46 ms
[2024-06-01 05:15:57] [INFO ] State equation strengthened by 42 read => feed constraints.
Problem BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-03 is UNSAT
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-03 TRUE TECHNIQUES SMT_REFINEMENT
Problem BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-05 is UNSAT
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-05 FALSE TECHNIQUES SMT_REFINEMENT
Problem BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-06 is UNSAT
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-06 TRUE TECHNIQUES SMT_REFINEMENT
Problem BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-08 is UNSAT
FORMULA BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-08 FALSE TECHNIQUES SMT_REFINEMENT
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/136 variables, 5/5 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/136 variables, 0/5 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 2 (OVERLAPS) 2/138 variables, 2/7 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/138 variables, 0/7 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 4 (OVERLAPS) 290/428 variables, 138/145 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/428 variables, 42/187 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/428 variables, 0/187 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 0/428 variables, 0/187 constraints. Problems are: Problem set: 4 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 428/428 variables, and 187 constraints, problems are : Problem set: 4 solved, 1 unsolved in 784 ms.
Refiners :[Positive P Invariants (semi-flows): 7/7 constraints, State Equation: 138/138 constraints, ReadFeed: 42/42 constraints, PredecessorRefiner: 5/5 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 4 solved, 1 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/54 variables, 0/0 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 12/66 variables, 5/5 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/5 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 290/356 variables, 66/71 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/356 variables, 42/113 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/356 variables, 0/113 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 72/428 variables, 72/185 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/428 variables, 2/187 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/428 variables, 1/188 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/428 variables, 0/188 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 0/428 variables, 0/188 constraints. Problems are: Problem set: 4 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 428/428 variables, and 188 constraints, problems are : Problem set: 4 solved, 1 unsolved in 922 ms.
Refiners :[Positive P Invariants (semi-flows): 7/7 constraints, State Equation: 138/138 constraints, ReadFeed: 42/42 constraints, PredecessorRefiner: 1/5 constraints, Known Traps: 0/0 constraints]
After SMT, in 12350ms problems are : Problem set: 4 solved, 1 unsolved
Parikh walk visited 0 properties in 169 ms.
Support contains 54 out of 138 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 138/138 places, 2348/2348 transitions.
Graph (complete) has 1302 edges and 138 vertex of which 136 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.13 ms
Discarding 2 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 569 ms. Remains 136 /138 variables (removed 2) and now considering 2348/2348 (removed 0) transitions.
Running 2345 sub problems to find dead transitions.
[2024-06-01 05:16:10] [INFO ] Flow matrix only has 290 transitions (discarded 2058 similar events)
// Phase 1: matrix 290 rows 136 cols
[2024-06-01 05:16:10] [INFO ] Computed 5 invariants in 9 ms
[2024-06-01 05:16:10] [INFO ] State equation strengthened by 42 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/136 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 2345 unsolved
[2024-06-01 05:16:37] [INFO ] Deduced a trap composed of 5 places in 327 ms of which 35 ms to minimize.
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 136/426 variables, and 6 constraints, problems are : Problem set: 0 solved, 2345 unsolved in 20076 ms.
Refiners :[Positive P Invariants (semi-flows): 5/5 constraints, State Equation: 0/136 constraints, ReadFeed: 0/42 constraints, PredecessorRefiner: 2345/2345 constraints, Known Traps: 1/1 constraints]
Escalating to Integer solving :Problem set: 0 solved, 2345 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/136 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 2345 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/136 variables, 1/6 constraints. Problems are: Problem set: 0 solved, 2345 unsolved
[2024-06-01 05:17:08] [INFO ] Deduced a trap composed of 25 places in 237 ms of which 3 ms to minimize.
Problem TDEAD1248 is UNSAT
Problem TDEAD1249 is UNSAT
Problem TDEAD1250 is UNSAT
Problem TDEAD1251 is UNSAT
Problem TDEAD1252 is UNSAT
Problem TDEAD1253 is UNSAT
Problem TDEAD1254 is UNSAT
Problem TDEAD1255 is UNSAT
Problem TDEAD1256 is UNSAT
Problem TDEAD1257 is UNSAT
Problem TDEAD1258 is UNSAT
Problem TDEAD1259 is UNSAT
Problem TDEAD1260 is UNSAT
Problem TDEAD1261 is UNSAT
Problem TDEAD1262 is UNSAT
Problem TDEAD1263 is UNSAT
Problem TDEAD1264 is UNSAT
Problem TDEAD1265 is UNSAT
Problem TDEAD1266 is UNSAT
Problem TDEAD1267 is UNSAT
Problem TDEAD1268 is UNSAT
Problem TDEAD1269 is UNSAT
Problem TDEAD1270 is UNSAT
Problem TDEAD1271 is UNSAT
Problem TDEAD1272 is UNSAT
Problem TDEAD1273 is UNSAT
Problem TDEAD1274 is UNSAT
Problem TDEAD1275 is UNSAT
Problem TDEAD1276 is UNSAT
Problem TDEAD1277 is UNSAT
Problem TDEAD1278 is UNSAT
Problem TDEAD1279 is UNSAT
Problem TDEAD1280 is UNSAT
Problem TDEAD1281 is UNSAT
Problem TDEAD1282 is UNSAT
Problem TDEAD1283 is UNSAT
Problem TDEAD1284 is UNSAT
Problem TDEAD1285 is UNSAT
Problem TDEAD1286 is UNSAT
Problem TDEAD1287 is UNSAT
Problem TDEAD1288 is UNSAT
Problem TDEAD1289 is UNSAT
Problem TDEAD1290 is UNSAT
Problem TDEAD1291 is UNSAT
Problem TDEAD1292 is UNSAT
Problem TDEAD1293 is UNSAT
Problem TDEAD1294 is UNSAT
Problem TDEAD1295 is UNSAT
Problem TDEAD1296 is UNSAT
Problem TDEAD1297 is UNSAT
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 136/426 variables, and 7 constraints, problems are : Problem set: 50 solved, 2295 unsolved in 20043 ms.
Refiners :[Positive P Invariants (semi-flows): 5/5 constraints, State Equation: 0/136 constraints, ReadFeed: 0/42 constraints, PredecessorRefiner: 0/2345 constraints, Known Traps: 2/2 constraints]
After SMT, in 58934ms problems are : Problem set: 50 solved, 2295 unsolved
Search for dead transitions found 50 dead transitions in 58982ms
Found 50 dead transitions using SMT.
Drop transitions (Dead Transitions using SMT only with invariants) removed 50 transitions
Dead transitions reduction (with SMT) triggered by suspicious arc values removed 50 transitions.
Starting structural reductions in REACHABILITY mode, iteration 1 : 136/138 places, 2298/2348 transitions.
Applied a total of 0 rules in 279 ms. Remains 136 /136 variables (removed 0) and now considering 2298/2298 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 59861 ms. Remains : 136/138 places, 2298/2348 transitions.
RANDOM walk for 40000 steps (92 resets) in 569 ms. (70 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40001 steps (28 resets) in 421 ms. (94 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 264480 steps, run timeout after 3001 ms. (steps per millisecond=88 ) properties seen :0 out of 1
Probabilistic random walk after 264480 steps, saw 70853 distinct states, run finished after 3004 ms. (steps per millisecond=88 ) properties seen :0
[2024-06-01 05:17:12] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
// Phase 1: matrix 289 rows 136 cols
[2024-06-01 05:17:12] [INFO ] Computed 5 invariants in 1 ms
[2024-06-01 05:17:12] [INFO ] State equation strengthened by 41 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/54 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 7/61 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/61 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 238/299 variables, 61/64 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/299 variables, 21/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/299 variables, 0/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (OVERLAPS) 125/424 variables, 74/159 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/424 variables, 2/161 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/424 variables, 20/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/424 variables, 0/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 1/425 variables, 1/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/425 variables, 0/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/425 variables, 0/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 425/425 variables, and 182 constraints, problems are : Problem set: 0 solved, 1 unsolved in 257 ms.
Refiners :[Positive P Invariants (semi-flows): 5/5 constraints, State Equation: 136/136 constraints, ReadFeed: 41/41 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/54 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 7/61 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/61 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 238/299 variables, 61/64 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/299 variables, 21/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/299 variables, 0/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 125/424 variables, 74/159 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/424 variables, 2/161 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/424 variables, 20/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/424 variables, 1/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/424 variables, 0/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 1/425 variables, 1/183 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/425 variables, 0/183 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/425 variables, 0/183 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 425/425 variables, and 183 constraints, problems are : Problem set: 0 solved, 1 unsolved in 858 ms.
Refiners :[Positive P Invariants (semi-flows): 5/5 constraints, State Equation: 136/136 constraints, ReadFeed: 41/41 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints]
After SMT, in 1220ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 172 ms.
Support contains 54 out of 136 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 136/136 places, 2298/2298 transitions.
Applied a total of 0 rules in 252 ms. Remains 136 /136 variables (removed 0) and now considering 2298/2298 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 252 ms. Remains : 136/136 places, 2298/2298 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 136/136 places, 2298/2298 transitions.
Applied a total of 0 rules in 259 ms. Remains 136 /136 variables (removed 0) and now considering 2298/2298 (removed 0) transitions.
[2024-06-01 05:17:14] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
[2024-06-01 05:17:14] [INFO ] Invariant cache hit.
[2024-06-01 05:17:14] [INFO ] Implicit Places using invariants in 315 ms returned []
[2024-06-01 05:17:14] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
[2024-06-01 05:17:14] [INFO ] Invariant cache hit.
[2024-06-01 05:17:15] [INFO ] State equation strengthened by 41 read => feed constraints.
[2024-06-01 05:17:15] [INFO ] Implicit Places using invariants and state equation in 914 ms returned [53]
Discarding 1 places :
Implicit Place search using SMT with State Equation took 1242 ms to find 1 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 135/136 places, 2298/2298 transitions.
Applied a total of 0 rules in 259 ms. Remains 135 /135 variables (removed 0) and now considering 2298/2298 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 1761 ms. Remains : 135/136 places, 2298/2298 transitions.
RANDOM walk for 40000 steps (92 resets) in 600 ms. (66 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (30 resets) in 559 ms. (71 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 264676 steps, run timeout after 3001 ms. (steps per millisecond=88 ) properties seen :0 out of 1
Probabilistic random walk after 264676 steps, saw 70886 distinct states, run finished after 3001 ms. (steps per millisecond=88 ) properties seen :0
[2024-06-01 05:17:19] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
// Phase 1: matrix 289 rows 135 cols
[2024-06-01 05:17:19] [INFO ] Computed 5 invariants in 4 ms
[2024-06-01 05:17:19] [INFO ] State equation strengthened by 41 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/54 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 7/61 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/61 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 238/299 variables, 61/64 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/299 variables, 21/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/299 variables, 0/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 124/423 variables, 73/158 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/423 variables, 2/160 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/423 variables, 20/180 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (INCLUDED_ONLY) 0/423 variables, 0/180 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 1/424 variables, 1/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/424 variables, 0/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/424 variables, 0/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 424/424 variables, and 181 constraints, problems are : Problem set: 0 solved, 1 unsolved in 263 ms.
Refiners :[Positive P Invariants (semi-flows): 5/5 constraints, State Equation: 135/135 constraints, ReadFeed: 41/41 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/54 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 7/61 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/61 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 238/299 variables, 61/64 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/299 variables, 21/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/299 variables, 0/85 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 124/423 variables, 73/158 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/423 variables, 2/160 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/423 variables, 20/180 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/423 variables, 1/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/423 variables, 0/181 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 1/424 variables, 1/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/424 variables, 0/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/424 variables, 0/182 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 424/424 variables, and 182 constraints, problems are : Problem set: 0 solved, 1 unsolved in 818 ms.
Refiners :[Positive P Invariants (semi-flows): 5/5 constraints, State Equation: 135/135 constraints, ReadFeed: 41/41 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints]
After SMT, in 1166ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 224 ms.
Support contains 54 out of 135 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 135/135 places, 2298/2298 transitions.
Applied a total of 0 rules in 206 ms. Remains 135 /135 variables (removed 0) and now considering 2298/2298 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 206 ms. Remains : 135/135 places, 2298/2298 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 135/135 places, 2298/2298 transitions.
Applied a total of 0 rules in 204 ms. Remains 135 /135 variables (removed 0) and now considering 2298/2298 (removed 0) transitions.
[2024-06-01 05:17:21] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
[2024-06-01 05:17:21] [INFO ] Invariant cache hit.
[2024-06-01 05:17:21] [INFO ] Implicit Places using invariants in 322 ms returned []
[2024-06-01 05:17:21] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
[2024-06-01 05:17:21] [INFO ] Invariant cache hit.
[2024-06-01 05:17:21] [INFO ] State equation strengthened by 41 read => feed constraints.
[2024-06-01 05:17:22] [INFO ] Implicit Places using invariants and state equation in 753 ms returned []
Implicit Place search using SMT with State Equation took 1078 ms to find 0 implicit places.
[2024-06-01 05:17:22] [INFO ] Redundant transitions in 139 ms returned []
Running 2295 sub problems to find dead transitions.
[2024-06-01 05:17:22] [INFO ] Flow matrix only has 289 transitions (discarded 2009 similar events)
[2024-06-01 05:17:22] [INFO ] Invariant cache hit.
[2024-06-01 05:17:22] [INFO ] State equation strengthened by 41 read => feed constraints.
Usage: pnml2lts-sym [-gvqh] [--order=]
[--mu-opt] [--saturation=]
[--sat-granularity=] [--save-sat-levels]
[--guidance=] [-d|--deadlock]
[--action=] [-i|--invariant=STRING] [-n|--no-exit]
[--trace=] [--type=]
[--mu=.mu] [--ctl-star=.ctl]
[--ctl=.ctl] [--ltl=.ltl] [--dot=STRING]
[--save-levels=STRING] [--pg-solve] [--attr=]
[--saturating-attractor] [--write-strategy=.spg]
[--check-strategy] [--interactive-play] [--player]
[--pg-write=.spg] [--no-matrix] [--noack=<1|2>]
[--edge-label=] [--labels] [-m|--matrix]
[--mucalc=.mcf|] [-c|--cache]
[--allow-undefined-edges] [--allow-undefined-values]
[-p|--por= (default: heur)]
[--weak=[valmari] (default: uses stronger left-commutativity)]
[--leap] [-r|--regroup=<(T,)+>] [--sloan-w1=] [--sloan-w2=]
[--cw-max-cols=] [--cw-max-rows=] [--col-ins=<(C.C',)+>]
[--mh-timeout=] [--row-perm=<(R,)+>] [--col-perm=<(C,)+>]
[--graph-metrics] [--regroup-exit] [--regroup-time]
[-g|--pins-guards] [--vset=] [--ldd32-step=]
[--ldd32-cache=] [--ldd-step=] [--ldd-cache=]
[--cache-ratio=] [--max-increase=]
[--min-free-nodes=] [--fdd-bits=]
[--fdd-reorder=]
[--vset-cache-diff=] [--no-soundness-check] [--precise]
[--next-union] [--peak-nodes] [--maxsum=]
[--block-size=] [--cluster-size=] [-v] [-q]
[--debug=] [--stats] [--where] [--when]
[--timeout=INT] [--version] [-h|--help] [--usage]
[OPTIONS] []
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-00
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-01
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-02
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-03
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-04
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-05
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-06
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-07
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-08
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-09
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-10
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-11
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-12
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-13
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-14
Could not compute solution for formula : BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-15

BK_STOP 1717219050009

--------------------
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_1.0.0.202405141337.jar
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -timeout 360 -rebuildPNML
mcc2024
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-00
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_0_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-01
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_1_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-02
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_2_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-03
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_3_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-04
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_4_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-05
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_5_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-06
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_6_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-07
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_7_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-08
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_8_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-09
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_9_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-10
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_10_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-11
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_11_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-12
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_12_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-13
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_13_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-14
rfs formula type AG
rfs formula formula --invariant=/tmp/578/inv_14_
rfs formula name BridgeAndVehicles-COL-V50P50N20-ReachabilityFireability-2024-15
rfs formula type EF
rfs formula formula --invariant=/tmp/578/inv_15_
pnml2lts-sym, ** error **: unknown vector set implementation lddmc

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="BridgeAndVehicles-COL-V50P50N20"
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 2-5568"
echo " Executing tool ltsminxred"
echo " Input is BridgeAndVehicles-COL-V50P50N20, 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 r472-tajo-171620398800103"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-COL-V50P50N20.tgz
mv BridgeAndVehicles-COL-V50P50N20 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 ;