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.r496-tall-171640602700109.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)
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5568
Executing tool ltsminxred
Input is FlexibleBarrier-PT-16b, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r496-tall-171640602700109
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.5M
-rw-r--r-- 1 mcc users 7.2K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 81K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.1K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 44K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:42 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.7K May 19 07:09 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K May 19 15:53 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K May 19 07:18 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 19 18:22 LTLFireability.xml
-rw-r--r-- 1 mcc users 17K Apr 13 08:03 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 185K Apr 13 08:03 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.7K Apr 13 08:02 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 72K Apr 13 08:02 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Apr 22 14:45 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Apr 22 14:45 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:42 equiv_col
-rw-r--r-- 1 mcc users 4 May 18 16:42 instance
-rw-r--r-- 1 mcc users 6 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 945K 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 positive values
NUM_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-00
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-01
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-02
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-03
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-04
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-05
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-06
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-07
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-08
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-09
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-10
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-11
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-12
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-13
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-14
FORMULA_NAME FlexibleBarrier-PT-16b-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1717183223157

Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=FlexibleBarrier-PT-16b
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202405141337
[2024-05-31 19:20:24] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -timeout, 360, -rebuildPNML]
[2024-05-31 19:20:24] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-31 19:20:24] [INFO ] Load time of PNML (sax parser for PT used): 189 ms
[2024-05-31 19:20:24] [INFO ] Transformed 3472 places.
[2024-05-31 19:20:24] [INFO ] Transformed 4001 transitions.
[2024-05-31 19:20:24] [INFO ] Found NUPN structural information;
[2024-05-31 19:20:24] [INFO ] Parsed PT model containing 3472 places and 4001 transitions and 10043 arcs in 304 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 8 ms.
Current structural bounds on expressions (Initiallly, because the net is safe) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
Current structural bounds on expressions (Before main loop) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
// Phase 1: matrix 4001 rows 3472 cols
[2024-05-31 19:20:24] [INFO ] Computed 18 invariants in 136 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
RANDOM walk for 10000 steps (90 resets) in 69 ms. (142 steps per ms)
FORMULA FlexibleBarrier-PT-16b-UpperBounds-12 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-11 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-08 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-06 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-00 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-04 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 100009 steps (75 resets) in 122 ms. (813 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-05-31 19:20:25] [INFO ] Invariant cache hit.
[2024-05-31 19:20:25] [INFO ] [Real]Absence check using 18 positive place invariants in 84 ms returned sat
[2024-05-31 19:20:28] [INFO ] [Real]Absence check using state equation in 2372 ms returned sat
[2024-05-31 19:20:30] [INFO ] Deduced a trap composed of 1229 places in 1727 ms of which 128 ms to minimize.
[2024-05-31 19:20:30] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 0
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.SMTTrapUtils.refineWithTraps(SMTTrapUtils.java:177)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:868)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2249)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
[2024-05-31 19:20:30] [INFO ] [Real]Absence check using 18 positive place invariants in 88 ms returned sat
[2024-05-31 19:20:33] [INFO ] [Real]Absence check using state equation in 2312 ms returned sat
[2024-05-31 19:20:33] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 268 ms.
[2024-05-31 19:20:34] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:20:34] [INFO ] [Nat]Absence check using 18 positive place invariants in 85 ms returned sat
[2024-05-31 19:20:37] [INFO ] [Nat]Absence check using state equation in 2470 ms returned sat
[2024-05-31 19:20:37] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 200 ms.
[2024-05-31 19:20:39] [INFO ] Added : 45 causal constraints over 9 iterations in 1836 ms. Result :unknown
[2024-05-31 19:20:39] [INFO ] [Real]Absence check using 18 positive place invariants in 79 ms returned sat
[2024-05-31 19:20:42] [INFO ] [Real]Absence check using state equation in 2470 ms returned sat
[2024-05-31 19:20:42] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 200 ms.
[2024-05-31 19:20:43] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:20:43] [INFO ] [Nat]Absence check using 18 positive place invariants in 80 ms returned sat
[2024-05-31 19:20:46] [INFO ] [Nat]Absence check using state equation in 2478 ms returned sat
[2024-05-31 19:20:46] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 189 ms.
[2024-05-31 19:20:48] [INFO ] Added : 45 causal constraints over 9 iterations in 1910 ms. Result :unknown
[2024-05-31 19:20:48] [INFO ] [Real]Absence check using 18 positive place invariants in 80 ms returned sat
[2024-05-31 19:20:50] [INFO ] [Real]Absence check using state equation in 1398 ms returned sat
[2024-05-31 19:20:50] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 192 ms.
[2024-05-31 19:20:51] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:20:51] [INFO ] [Nat]Absence check using 18 positive place invariants in 81 ms returned sat
[2024-05-31 19:20:53] [INFO ] [Nat]Absence check using state equation in 1490 ms returned sat
[2024-05-31 19:20:53] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 198 ms.
[2024-05-31 19:20:56] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 3
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.DeadlockTester.refineWithCausalOrder(DeadlockTester.java:1137)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:875)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2251)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
[2024-05-31 19:20:56] [INFO ] [Real]Absence check using 18 positive place invariants in 78 ms returned sat
[2024-05-31 19:20:58] [INFO ] [Real]Absence check using state equation in 1457 ms returned sat
[2024-05-31 19:20:58] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 224 ms.
[2024-05-31 19:20:59] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:20:59] [INFO ] [Nat]Absence check using 18 positive place invariants in 79 ms returned sat
[2024-05-31 19:21:01] [INFO ] [Nat]Absence check using state equation in 1398 ms returned sat
[2024-05-31 19:21:01] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 241 ms.
[2024-05-31 19:21:04] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 4
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.DeadlockTester.refineWithCausalOrder(DeadlockTester.java:1137)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:875)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2251)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
[2024-05-31 19:21:04] [INFO ] [Real]Absence check using 18 positive place invariants in 76 ms returned sat
[2024-05-31 19:21:06] [INFO ] [Real]Absence check using state equation in 1448 ms returned sat
[2024-05-31 19:21:06] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 209 ms.
[2024-05-31 19:21:07] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:21:07] [INFO ] [Nat]Absence check using 18 positive place invariants in 81 ms returned sat
[2024-05-31 19:21:09] [INFO ] [Nat]Absence check using state equation in 1437 ms returned sat
[2024-05-31 19:21:09] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 232 ms.
Maximisation of solution failed !
Minimization took 2 ms.
[2024-05-31 19:21:12] [INFO ] [Real]Absence check using 18 positive place invariants in 79 ms returned sat
[2024-05-31 19:21:15] [INFO ] [Real]Absence check using state equation in 2412 ms returned sat
[2024-05-31 19:21:15] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 224 ms.
[2024-05-31 19:21:16] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:21:16] [INFO ] [Nat]Absence check using 18 positive place invariants in 83 ms returned sat
[2024-05-31 19:21:19] [INFO ] [Nat]Absence check using state equation in 2444 ms returned sat
[2024-05-31 19:21:19] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 217 ms.
[2024-05-31 19:21:21] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 6
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.DeadlockTester.refineWithCausalOrder(DeadlockTester.java:1137)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:875)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2251)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
[2024-05-31 19:21:21] [INFO ] [Real]Absence check using 18 positive place invariants in 76 ms returned sat
[2024-05-31 19:21:23] [INFO ] [Real]Absence check using state equation in 1434 ms returned sat
[2024-05-31 19:21:23] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 196 ms.
[2024-05-31 19:21:24] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:21:24] [INFO ] [Nat]Absence check using 18 positive place invariants in 78 ms returned sat
[2024-05-31 19:21:26] [INFO ] [Nat]Absence check using state equation in 1430 ms returned sat
[2024-05-31 19:21:26] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 214 ms.
[2024-05-31 19:21:29] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 7
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.DeadlockTester.refineWithCausalOrder(DeadlockTester.java:1137)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:875)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2251)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
[2024-05-31 19:21:29] [INFO ] [Real]Absence check using 18 positive place invariants in 72 ms returned sat
[2024-05-31 19:21:30] [INFO ] [Real]Absence check using state equation in 1326 ms returned sat
[2024-05-31 19:21:31] [INFO ] Deduced a trap composed of 153 places in 448 ms of which 9 ms to minimize.
[2024-05-31 19:21:31] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:21:32] [INFO ] [Nat]Absence check using 18 positive place invariants in 77 ms returned sat
[2024-05-31 19:21:33] [INFO ] [Nat]Absence check using state equation in 1316 ms returned sat
[2024-05-31 19:21:34] [INFO ] Deduced a trap composed of 153 places in 459 ms of which 8 ms to minimize.
[2024-05-31 19:21:34] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 684 ms
[2024-05-31 19:21:34] [INFO ] Computed and/alt/rep : 3689/5797/3689 causal constraints (skipped 311 transitions) in 196 ms.
[2024-05-31 19:21:36] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 8
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.DeadlockTester.refineWithCausalOrder(DeadlockTester.java:1137)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:875)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2251)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
[2024-05-31 19:21:37] [INFO ] [Real]Absence check using 18 positive place invariants in 78 ms returned sat
[2024-05-31 19:21:38] [INFO ] [Real]Absence check using state equation in 1436 ms returned sat
[2024-05-31 19:21:40] [INFO ] Deduced a trap composed of 1318 places in 1849 ms of which 16 ms to minimize.
[2024-05-31 19:21:41] [INFO ] Solution in real domain found non-integer solution.
[2024-05-31 19:21:41] [INFO ] [Nat]Absence check using 18 positive place invariants in 76 ms returned sat
[2024-05-31 19:21:43] [INFO ] [Nat]Absence check using state equation in 1384 ms returned sat
[2024-05-31 19:21:44] [INFO ] Deduced a trap composed of 1318 places in 1785 ms of which 15 ms to minimize.
[2024-05-31 19:21:46] [INFO ] Deduced a trap composed of 1237 places in 1723 ms of which 16 ms to minimize.
[2024-05-31 19:21:46] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 9
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:299)
at fr.lip6.move.gal.structural.smt.SMTTrapUtils.refineWithTraps(SMTTrapUtils.java:177)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:868)
at fr.lip6.move.gal.structural.smt.DeadlockTester.findStructuralMaxWithSMT(DeadlockTester.java:2251)
at fr.lip6.move.gal.application.solver.UpperBoundsSolver.applyReductions(UpperBoundsSolver.java:219)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:910)
at fr.lip6.move.gal.application.Application.start(Application.java:189)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:208)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
at org.eclipse.equinox.launcher.Main.main(Main.java:1432)
Current structural bounds on expressions (after SMT) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
FORMULA FlexibleBarrier-PT-16b-UpperBounds-05 1 TECHNIQUES TOPOLOGICAL PARIKH_WALK
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0, 1, 0, 0, 1, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1]
Support contains 9 out of 3472 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 3472/3472 places, 4001/4001 transitions.
Graph (trivial) has 3406 edges and 3472 vertex of which 98 / 3472 are part of one of the 16 SCC in 15 ms
Free SCC test removed 82 places
Drop transitions (Empty/Sink Transition effects.) removed 99 transitions
Reduce isomorphic transitions removed 99 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 850 transitions
Trivial Post-agglo rules discarded 850 transitions
Performed 850 trivial Post agglomeration. Transition count delta: 850
Iterating post reduction 0 with 850 rules applied. Total rules applied 851 place count 3390 transition count 3052
Reduce places removed 850 places and 0 transitions.
Performed 4 Post agglomeration using F-continuation condition.Transition count delta: 4
Iterating post reduction 1 with 854 rules applied. Total rules applied 1705 place count 2540 transition count 3048
Reduce places removed 4 places and 0 transitions.
Iterating post reduction 2 with 4 rules applied. Total rules applied 1709 place count 2536 transition count 3048
Performed 234 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 234 Pre rules applied. Total rules applied 1709 place count 2536 transition count 2814
Deduced a syphon composed of 234 places in 2 ms
Reduce places removed 234 places and 0 transitions.
Iterating global reduction 3 with 468 rules applied. Total rules applied 2177 place count 2302 transition count 2814
Discarding 1380 places :
Symmetric choice reduction at 3 with 1380 rule applications. Total rules 3557 place count 922 transition count 1434
Iterating global reduction 3 with 1380 rules applied. Total rules applied 4937 place count 922 transition count 1434
Performed 16 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 16 Pre rules applied. Total rules applied 4937 place count 922 transition count 1418
Deduced a syphon composed of 16 places in 3 ms
Reduce places removed 16 places and 0 transitions.
Iterating global reduction 3 with 32 rules applied. Total rules applied 4969 place count 906 transition count 1418
Discarding 222 places :
Symmetric choice reduction at 3 with 222 rule applications. Total rules 5191 place count 684 transition count 1196
Iterating global reduction 3 with 222 rules applied. Total rules applied 5413 place count 684 transition count 1196
Ensure Unique test removed 219 transitions
Reduce isomorphic transitions removed 219 transitions.
Iterating post reduction 3 with 219 rules applied. Total rules applied 5632 place count 684 transition count 977
Performed 83 Post agglomeration using F-continuation condition.Transition count delta: 83
Deduced a syphon composed of 83 places in 0 ms
Reduce places removed 83 places and 0 transitions.
Iterating global reduction 4 with 166 rules applied. Total rules applied 5798 place count 601 transition count 894
Drop transitions (Empty/Sink Transition effects.) removed 32 transitions
Reduce isomorphic transitions removed 32 transitions.
Iterating post reduction 4 with 32 rules applied. Total rules applied 5830 place count 601 transition count 862
Discarding 16 places :
Symmetric choice reduction at 5 with 16 rule applications. Total rules 5846 place count 585 transition count 846
Iterating global reduction 5 with 16 rules applied. Total rules applied 5862 place count 585 transition count 846
Free-agglomeration rule applied 488 times.
Iterating global reduction 5 with 488 rules applied. Total rules applied 6350 place count 585 transition count 358
Reduce places removed 488 places and 0 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 222 transitions
Reduce isomorphic transitions removed 222 transitions.
Graph (complete) has 267 edges and 97 vertex of which 72 are kept as prefixes of interest. Removing 25 places using SCC suffix rule.1 ms
Discarding 25 places :
Also discarding 0 output transitions
Iterating post reduction 5 with 711 rules applied. Total rules applied 7061 place count 72 transition count 136
Drop transitions (Empty/Sink Transition effects.) removed 35 transitions
Reduce isomorphic transitions removed 35 transitions.
Iterating post reduction 6 with 35 rules applied. Total rules applied 7096 place count 72 transition count 101
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 7 with 1 rules applied. Total rules applied 7097 place count 71 transition count 100
Reduce places removed 1 places and 0 transitions.
Graph (trivial) has 55 edges and 70 vertex of which 22 / 70 are part of one of the 11 SCC in 0 ms
Free SCC test removed 11 places
Iterating post reduction 7 with 2 rules applied. Total rules applied 7099 place count 59 transition count 100
Drop transitions (Empty/Sink Transition effects.) removed 22 transitions
Reduce isomorphic transitions removed 22 transitions.
Iterating post reduction 8 with 22 rules applied. Total rules applied 7121 place count 59 transition count 78
Performed 11 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 9 with 11 Pre rules applied. Total rules applied 7121 place count 59 transition count 67
Deduced a syphon composed of 11 places in 1 ms
Reduce places removed 11 places and 0 transitions.
Iterating global reduction 9 with 22 rules applied. Total rules applied 7143 place count 48 transition count 67
Drop transitions (Empty/Sink Transition effects.) removed 11 transitions
Reduce isomorphic transitions removed 11 transitions.
Iterating post reduction 9 with 11 rules applied. Total rules applied 7154 place count 48 transition count 56
Performed 11 Post agglomeration using F-continuation condition.Transition count delta: 11
Deduced a syphon composed of 11 places in 0 ms
Reduce places removed 11 places and 0 transitions.
Iterating global reduction 10 with 22 rules applied. Total rules applied 7176 place count 37 transition count 45
Free-agglomeration rule applied 11 times.
Iterating global reduction 10 with 11 rules applied. Total rules applied 7187 place count 37 transition count 34
Reduce places removed 19 places and 0 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 11 transitions
Reduce isomorphic transitions removed 11 transitions.
Iterating post reduction 10 with 30 rules applied. Total rules applied 7217 place count 18 transition count 23
Free-agglomeration rule applied 2 times.
Iterating global reduction 11 with 2 rules applied. Total rules applied 7219 place count 18 transition count 21
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 11 with 2 rules applied. Total rules applied 7221 place count 16 transition count 21
Applied a total of 7221 rules in 736 ms. Remains 16 /3472 variables (removed 3456) and now considering 21/4001 (removed 3980) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 745 ms. Remains : 16/3472 places, 21/4001 transitions.
// Phase 1: matrix 21 rows 16 cols
[2024-05-31 19:21:47] [INFO ] Computed 4 invariants in 0 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0, 1, 0, 0, 1, 0, 0, 0, 0] Max Struct:[1, 1, 1, 1, 1, 1, 1, 1, 1]
FORMULA FlexibleBarrier-PT-16b-UpperBounds-09 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FlexibleBarrier-PT-16b-UpperBounds-02 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 1000000 steps (2 resets) in 752 ms. (1328 steps per ms)
FORMULA FlexibleBarrier-PT-16b-UpperBounds-15 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-14 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-13 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-10 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-07 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-03 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FlexibleBarrier-PT-16b-UpperBounds-01 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 1000000 steps (2 resets) in 263 ms. (3787 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[] Max Struct:[]
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 )
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[] Max Struct:[]
All properties solved without resorting to model-checking.
Total runtime 84590 ms.
ITS solved all properties within timeout

BK_STOP 1717183308913

--------------------
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 UpperBounds -timeout 360 -rebuildPNML

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="FlexibleBarrier-PT-16b"
export BK_EXAMINATION="UpperBounds"
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 FlexibleBarrier-PT-16b, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r496-tall-171640602700109"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/FlexibleBarrier-PT-16b.tgz
mv FlexibleBarrier-PT-16b execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "UpperBounds.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 '' UpperBounds.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;