About the Execution of ITS-Tools for DrinkVendingMachine-COL-10
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 401.500 | 22168.00 | 34997.00 | 682.50 | TFTFFFFFTFFFFTTF | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2023-input.r133-smll-167819411400580.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-5348
Executing tool itstools
Input is DrinkVendingMachine-COL-10, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r133-smll-167819411400580
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 548K
-rw-r--r-- 1 mcc users 7.4K Feb 26 07:15 CTLCardinality.txt
-rw-r--r-- 1 mcc users 73K Feb 26 07:15 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.3K Feb 26 06:56 CTLFireability.txt
-rw-r--r-- 1 mcc users 40K Feb 26 06:56 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.5K Feb 25 16:02 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K Feb 25 16:02 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Feb 25 16:02 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 16:02 LTLFireability.xml
-rw-r--r-- 1 mcc users 18K Feb 26 21:18 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 174K Feb 26 21:18 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 12K Feb 26 20:18 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 87K Feb 26 20:18 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Feb 25 16:02 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Feb 25 16:02 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:22 equiv_pt
-rw-r--r-- 1 mcc users 3 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 5 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 24K Mar 5 18:22 model.pnml
--------------------
content from stdout:
=== Data for post analysis generated by BenchKit (invocation template)
The expected result is a vector of booleans
BOOL_VECTOR
here is the order used to build the result vector(from text file)
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-00
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-01
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-02
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-03
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-04
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-05
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-06
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-07
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-08
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-09
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-10
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-11
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-12
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-13
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-14
FORMULA_NAME DrinkVendingMachine-COL-10-LTLFireability-15
=== Now, execution of the tool begins
BK_START 1678621928965
bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=LTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=DrinkVendingMachine-COL-10
Not applying reductions.
Model is COL
LTLFireability COL
Running Version 202303021504
[2023-03-12 11:52:11] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2023-03-12 11:52:11] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-12 11:52:11] [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.
[2023-03-12 11:52:12] [WARNING] Using fallBack plugin, rng conformance not checked
[2023-03-12 11:52:12] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 1018 ms
[2023-03-12 11:52:12] [INFO ] Imported 6 HL places and 7 HL transitions for a total of 120 PT places and 444460.0 transition bindings in 30 ms.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 19 ms.
Working with output stream class java.io.PrintStream
[2023-03-12 11:52:13] [INFO ] Built PT skeleton of HLPN with 6 places and 7 transitions 28 arcs in 8 ms.
[2023-03-12 11:52:13] [INFO ] Skeletonized 8 HLPN properties in 4 ms. Removed 8 properties that had guard overlaps.
Computed a total of 0 stabilizing places and 0 stable transitions
Remains 4 properties that can be checked using skeleton over-approximation.
Computed a total of 0 stabilizing places and 0 stable transitions
Finished random walk after 132 steps, including 0 resets, run visited all 3 properties in 13 ms. (steps per millisecond=10 )
[2023-03-12 11:52:13] [INFO ] Flatten gal took : 26 ms
[2023-03-12 11:52:13] [INFO ] Flatten gal took : 5 ms
Symmetric sort wr.t. initial and guards and successors and join/free detected :Quality
Symmetric sort wr.t. initial detected :Quality
Transition elaborate0 : guard parameter $x(Quality:40) in guard (LEQ $x 9)introduces in Quality(40) partition with 2 elements
Transition elaborate1 : guard parameter $x(Quality:40) in guard (AND (GT $x 9) (LEQ $x 19))introduces in Quality(40) partition with 2 elements
Transition elaborate2 : guard parameter $x(Quality:40) in guard (AND (GT $x 19) (LEQ $x 29))introduces in Quality(40) partition with 2 elements
Transition elaborate3 : guard parameter $x(Quality:40) in guard (AND (GT $x 29) (LEQ $x 39))introduces in Quality(40) partition with 2 elements
Sort wr.t. initial and guards Quality has partition 4
Applying symmetric unfolding of partitioned symmetric sort :Quality domain size was 40 reducing to 4 values.
For transition elaborate0:(LEQ $x 9) -> (EQ $x 3)
For transition elaborate1:(AND (GT $x 9) (LEQ $x 19)) -> (EQ $x 2)
For transition elaborate2:(AND (GT $x 19) (LEQ $x 29)) -> (EQ $x 1)
For transition elaborate3:(AND (GT $x 29) (LEQ $x 39)) -> (EQ $x 0)
Symmetric sort wr.t. initial and guards and successors and join/free detected :Options
Symmetric sort wr.t. initial detected :Options
Symmetric sort wr.t. initial and guards detected :Options
Applying symmetric unfolding of full symmetric sort :Options domain size was 10
Symmetric sort wr.t. initial and guards and successors and join/free detected :Products
Symmetric sort wr.t. initial detected :Products
Symmetric sort wr.t. initial and guards detected :Products
Applying symmetric unfolding of full symmetric sort :Products domain size was 10
[2023-03-12 11:52:13] [INFO ] Unfolded HLPN to a Petri net with 12 places and 10 transitions 34 arcs in 28 ms.
[2023-03-12 11:52:13] [INFO ] Unfolded 16 HLPN properties in 0 ms.
Support contains 12 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 11 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
// Phase 1: matrix 10 rows 12 cols
[2023-03-12 11:52:13] [INFO ] Computed 6 place invariants in 3 ms
[2023-03-12 11:52:13] [INFO ] Dead Transitions using invariants and state equation in 174 ms found 0 transitions.
[2023-03-12 11:52:13] [INFO ] Invariant cache hit.
[2023-03-12 11:52:13] [INFO ] Implicit Places using invariants in 31 ms returned []
[2023-03-12 11:52:13] [INFO ] Invariant cache hit.
[2023-03-12 11:52:13] [INFO ] Implicit Places using invariants and state equation in 43 ms returned []
Implicit Place search using SMT with State Equation took 76 ms to find 0 implicit places.
[2023-03-12 11:52:13] [INFO ] Invariant cache hit.
[2023-03-12 11:52:13] [INFO ] Dead Transitions using invariants and state equation in 37 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 357 ms. Remains : 12/12 places, 10/10 transitions.
Support contains 12 out of 12 places after structural reductions.
[2023-03-12 11:52:13] [INFO ] Flatten gal took : 7 ms
[2023-03-12 11:52:13] [INFO ] Flatten gal took : 7 ms
[2023-03-12 11:52:13] [INFO ] Input system was already deterministic with 10 transitions.
Incomplete random walk after 10009 steps, including 2 resets, run finished after 101 ms. (steps per millisecond=99 ) properties (out of 14) seen :13
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 55 ms. (steps per millisecond=181 ) properties (out of 1) seen :0
Running SMT prover for 1 properties.
[2023-03-12 11:52:13] [INFO ] Invariant cache hit.
[2023-03-12 11:52:13] [INFO ] After 38ms SMT Verify possible using all constraints in real domain returned unsat :1 sat :0
Fused 1 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-11 FALSE TECHNIQUES REACHABILITY_KNOWLEDGE
Successfully simplified 1 atomic propositions for a total of 15 simplifications.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-00 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Computed a total of 0 stabilizing places and 0 stable transitions
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(((p0||G(p1))&&(X(F(!p0))||p2))))'
Support contains 7 out of 12 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 8 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:14] [INFO ] Invariant cache hit.
[2023-03-12 11:52:14] [INFO ] Dead Transitions using invariants and state equation in 41 ms found 0 transitions.
[2023-03-12 11:52:14] [INFO ] Invariant cache hit.
[2023-03-12 11:52:14] [INFO ] Implicit Places using invariants in 33 ms returned []
[2023-03-12 11:52:14] [INFO ] Invariant cache hit.
[2023-03-12 11:52:14] [INFO ] Implicit Places using invariants and state equation in 40 ms returned []
Implicit Place search using SMT with State Equation took 77 ms to find 0 implicit places.
[2023-03-12 11:52:14] [INFO ] Redundant transitions in 1 ms returned []
[2023-03-12 11:52:14] [INFO ] Invariant cache hit.
[2023-03-12 11:52:14] [INFO ] Dead Transitions using invariants and state equation in 46 ms found 0 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 182 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 406 ms :[(OR (AND (NOT p0) (NOT p1)) (AND p0 (NOT p2))), true, (AND p0 (NOT p1)), p0]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-01 automaton TGBA Formula[mat=[[{ cond=(OR p0 p1), acceptance={} source=0 dest: 0}, { cond=(AND (NOT p0) (NOT p1)), acceptance={} source=0 dest: 1}, { cond=(AND (NOT p0) p1), acceptance={} source=0 dest: 2}, { cond=(OR (AND p0 (NOT p2)) (AND p1 (NOT p2))), acceptance={} source=0 dest: 3}], [{ cond=true, acceptance={0} source=1 dest: 1}], [{ cond=(AND p0 (NOT p1)), acceptance={} source=2 dest: 1}, { cond=(AND p0 p1), acceptance={} source=2 dest: 2}], [{ cond=p0, acceptance={0} source=3 dest: 3}]], initial=0, aps=[p0:(AND (GEQ s1 2) (GEQ s3 1) (GEQ s5 1)), p1:(OR (GEQ s8 1) (GEQ s9 1) (GEQ s10 1) (GEQ s11 1)), p2:(OR (GEQ s8 1) (GEQ s9 1) (GEQ s10 1) (GEQ s11 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][true, true, true, true]]
Entered a terminal (fully accepting) state of product in 13785 steps with 894 reset in 107 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-01 FALSE TECHNIQUES STUTTER_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-01 finished in 806 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X((G(p1)||p0)))'
Support contains 5 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 1 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:15] [INFO ] Invariant cache hit.
[2023-03-12 11:52:15] [INFO ] Dead Transitions using invariants and state equation in 34 ms found 0 transitions.
[2023-03-12 11:52:15] [INFO ] Invariant cache hit.
[2023-03-12 11:52:15] [INFO ] Implicit Places using invariants in 33 ms returned []
[2023-03-12 11:52:15] [INFO ] Invariant cache hit.
[2023-03-12 11:52:15] [INFO ] Implicit Places using invariants and state equation in 44 ms returned []
Implicit Place search using SMT with State Equation took 79 ms to find 0 implicit places.
[2023-03-12 11:52:15] [INFO ] Invariant cache hit.
[2023-03-12 11:52:15] [INFO ] Dead Transitions using invariants and state equation in 36 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 152 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 175 ms :[true, (AND (NOT p1) (NOT p0)), (NOT p1), (AND (NOT p1) (NOT p0))]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-02 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 3}], [{ cond=(NOT p1), acceptance={} source=2 dest: 0}, { cond=p1, acceptance={} source=2 dest: 2}], [{ cond=(AND (NOT p0) (NOT p1)), acceptance={} source=3 dest: 0}, { cond=(AND (NOT p0) p1), acceptance={} source=3 dest: 2}]], initial=1, aps=[p1:(GEQ s0 1), p0:(OR (GEQ s8 1) (GEQ s9 1) (GEQ s10 1) (GEQ s11 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Product exploration explored 100000 steps with 50000 reset in 227 ms.
Product exploration explored 100000 steps with 50000 reset in 244 ms.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Knowledge obtained : [(AND (NOT p1) (NOT p0)), (X (NOT (AND (NOT p0) p1))), (X (NOT (AND (NOT p0) (NOT p1)))), true]
False Knowledge obtained : [(X (X (NOT p1))), (X (X p1))]
Property proved to be true thanks to knowledge :(X (NOT (AND (NOT p0) (NOT p1))))
Knowledge based reduction with 4 factoid took 167 ms. Reduced automaton from 4 states, 6 edges and 2 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA DrinkVendingMachine-COL-10-LTLFireability-02 TRUE TECHNIQUES KNOWLEDGE
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-02 finished in 994 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F((!p0 U (G(!p0)||(!p0&&G(!p1))))))'
Support contains 7 out of 12 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 2 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Dead Transitions using invariants and state equation in 37 ms found 0 transitions.
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Implicit Places using invariants in 36 ms returned []
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Implicit Places using invariants and state equation in 34 ms returned []
Implicit Place search using SMT with State Equation took 72 ms to find 0 implicit places.
[2023-03-12 11:52:16] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Dead Transitions using invariants and state equation in 32 ms found 0 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 151 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 78 ms :[p0, (AND p1 p0)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-03 automaton TGBA Formula[mat=[[{ cond=(AND p1 (NOT p0)), acceptance={0} source=0 dest: 0}, { cond=p0, acceptance={0, 1} source=0 dest: 0}, { cond=(AND (NOT p1) (NOT p0)), acceptance={} source=0 dest: 1}], [{ cond=(AND p1 (NOT p0)), acceptance={0} source=1 dest: 0}, { cond=(AND p1 p0), acceptance={0, 1} source=1 dest: 0}, { cond=(AND (NOT p1) (NOT p0)), acceptance={} source=1 dest: 1}, { cond=(AND (NOT p1) p0), acceptance={1} source=1 dest: 1}]], initial=0, aps=[p1:(AND (GEQ s1 3) (GEQ s3 1) (GEQ s4 1)), p0:(OR (GEQ s8 1) (GEQ s9 1) (GEQ s10 1) (GEQ s11 1))], nbAcceptance=2, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null, null][true, true]]
Product exploration explored 100000 steps with 0 reset in 217 ms.
Stack based approach found an accepted trace after 17 steps with 0 reset with depth 18 and stack size 18 in 0 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-03 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-03 finished in 463 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(F(p0))))'
Support contains 7 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 0 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Dead Transitions using invariants and state equation in 34 ms found 0 transitions.
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Implicit Places using invariants in 24 ms returned []
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Implicit Places using invariants and state equation in 32 ms returned []
Implicit Place search using SMT with State Equation took 58 ms to find 0 implicit places.
[2023-03-12 11:52:16] [INFO ] Invariant cache hit.
[2023-03-12 11:52:16] [INFO ] Dead Transitions using invariants and state equation in 28 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 121 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 112 ms :[(NOT p0), (NOT p0), (NOT p0)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-04 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 0}], [{ cond=true, acceptance={} source=2 dest: 1}]], initial=2, aps=[p0:(AND (LT s8 1) (LT s9 1) (LT s10 1) (LT s11 1) (OR (LT s1 3) (LT s3 1) (LT s4 1)))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 1798 reset in 111 ms.
Stack based approach found an accepted trace after 8 steps with 0 reset with depth 9 and stack size 9 in 1 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-04 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-04 finished in 359 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(!(p0 U (X(p0) U X(p1))))))'
Support contains 5 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 0 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Dead Transitions using invariants and state equation in 32 ms found 0 transitions.
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Implicit Places using invariants in 27 ms returned []
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Implicit Places using invariants and state equation in 46 ms returned []
Implicit Place search using SMT with State Equation took 75 ms to find 0 implicit places.
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Dead Transitions using invariants and state equation in 29 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 140 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 138 ms :[p1, false, p1]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-05 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=p0, acceptance={} source=0 dest: 1}, { cond=true, acceptance={} source=0 dest: 2}], [{ cond=(AND p0 (NOT p1)), acceptance={1} source=1 dest: 1}, { cond=(NOT p1), acceptance={0, 1} source=1 dest: 2}], [{ cond=(AND p0 p1), acceptance={1} source=2 dest: 1}, { cond=(AND p0 (NOT p1)), acceptance={0} source=2 dest: 2}, { cond=p1, acceptance={0, 1} source=2 dest: 2}]], initial=0, aps=[p0:(OR (GEQ s8 1) (GEQ s9 1) (GEQ s10 1) (GEQ s11 1)), p1:(GEQ s2 1)], nbAcceptance=2, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 21774 reset in 192 ms.
Stack based approach found an accepted trace after 988 steps with 211 reset with depth 6 and stack size 6 in 2 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-05 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-05 finished in 498 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F(G(p0))&&(G(p1)||G(F(p2)))))'
Support contains 7 out of 12 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 1 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Dead Transitions using invariants and state equation in 32 ms found 0 transitions.
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Implicit Places using invariants in 30 ms returned []
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Implicit Places using invariants and state equation in 32 ms returned []
Implicit Place search using SMT with State Equation took 64 ms to find 0 implicit places.
[2023-03-12 11:52:17] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-12 11:52:17] [INFO ] Invariant cache hit.
[2023-03-12 11:52:17] [INFO ] Dead Transitions using invariants and state equation in 31 ms found 0 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 139 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 254 ms :[(OR (NOT p0) (AND (NOT p1) (NOT p2))), (NOT p0), (NOT p2), (NOT p2), (AND (NOT p2) (NOT p1))]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-06 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}, { cond=(AND (NOT p1) (NOT p2)), acceptance={} source=0 dest: 2}, { cond=(NOT p1), acceptance={} source=0 dest: 3}, { cond=p1, acceptance={} source=0 dest: 4}], [{ cond=p0, acceptance={} source=1 dest: 1}, { cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p2), acceptance={0} source=2 dest: 2}], [{ cond=(NOT p2), acceptance={} source=3 dest: 2}, { cond=true, acceptance={} source=3 dest: 3}], [{ cond=(AND (NOT p1) (NOT p2)), acceptance={} source=4 dest: 2}, { cond=(NOT p1), acceptance={} source=4 dest: 3}, { cond=p1, acceptance={} source=4 dest: 4}]], initial=0, aps=[p1:(GEQ s0 1), p2:(AND (GEQ s3 1) (GEQ s7 1)), p0:(OR (GEQ s8 1) (GEQ s9 1) (GEQ s10 1) (GEQ s11 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null, null, null][true, true, true, true, true]]
Product exploration explored 100000 steps with 0 reset in 177 ms.
Stack based approach found an accepted trace after 159 steps with 2 reset with depth 52 and stack size 52 in 2 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-06 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-06 finished in 591 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(((F(!p0) U p1)||G(p2)))'
Support contains 5 out of 12 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 0 with 3 rules applied. Total rules applied 3 place count 10 transition count 9
Applied a total of 3 rules in 5 ms. Remains 10 /12 variables (removed 2) and now considering 9/10 (removed 1) transitions.
// Phase 1: matrix 9 rows 10 cols
[2023-03-12 11:52:18] [INFO ] Computed 5 place invariants in 1 ms
[2023-03-12 11:52:18] [INFO ] Dead Transitions using invariants and state equation in 45 ms found 0 transitions.
[2023-03-12 11:52:18] [INFO ] Invariant cache hit.
[2023-03-12 11:52:18] [INFO ] Implicit Places using invariants in 22 ms returned []
[2023-03-12 11:52:18] [INFO ] Invariant cache hit.
[2023-03-12 11:52:18] [INFO ] Implicit Places using invariants and state equation in 29 ms returned []
Implicit Place search using SMT with State Equation took 53 ms to find 0 implicit places.
[2023-03-12 11:52:18] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-12 11:52:18] [INFO ] Invariant cache hit.
[2023-03-12 11:52:18] [INFO ] Dead Transitions using invariants and state equation in 31 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 10/12 places, 9/10 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 144 ms. Remains : 10/12 places, 9/10 transitions.
Stuttering acceptance computed with spot in 160 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-07 automaton TGBA Formula[mat=[[{ cond=(AND (NOT p1) p2), acceptance={} source=0 dest: 0}, { cond=(AND (NOT p1) p0 (NOT p2)), acceptance={} source=0 dest: 1}, { cond=(AND (NOT p1) (NOT p2)), acceptance={} source=0 dest: 2}, { cond=(AND (NOT p1) p0 p2), acceptance={} source=0 dest: 3}], [{ cond=p0, acceptance={0} source=1 dest: 1}], [{ cond=(AND (NOT p1) p0), acceptance={0} source=2 dest: 1}, { cond=(NOT p1), acceptance={0} source=2 dest: 2}], [{ cond=(AND p0 (NOT p2)), acceptance={} source=3 dest: 1}, { cond=(AND p0 p2), acceptance={} source=3 dest: 3}]], initial=0, aps=[p1:(OR (LT s1 1) (LT s3 1) (LT s5 1)), p2:(AND (GEQ s3 1) (GEQ s6 1)), p0:(AND (GEQ s1 3) (GEQ s3 1) (GEQ s4 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][true, true, true, true]]
Product exploration explored 100000 steps with 8471 reset in 194 ms.
Product exploration explored 100000 steps with 8450 reset in 391 ms.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Knowledge obtained : [(AND (NOT p1) p2 p0), (X (NOT (AND (NOT p1) p0 (NOT p2)))), (X (AND (NOT p1) p2)), (X (AND (NOT p1) p0 p2)), (X (NOT p1)), (X (NOT (AND p0 (NOT p2)))), (X (NOT (AND (NOT p1) (NOT p2)))), (X (AND p0 p2)), (X p0), (X (AND (NOT p1) p0)), (X (X (NOT (AND (NOT p1) p0 (NOT p2))))), (X (X (AND (NOT p1) p2))), (X (X (AND (NOT p1) p0 p2))), (X (X (NOT p1))), (X (X (NOT (AND p0 (NOT p2))))), (X (X (NOT (AND (NOT p1) (NOT p2))))), (X (X (AND p0 p2))), (X (X p0)), (X (X (AND (NOT p1) p0)))]
False Knowledge obtained : []
Knowledge based reduction with 19 factoid took 930 ms. Reduced automaton from 4 states, 9 edges and 3 AP (stutter insensitive) to 4 states, 9 edges and 3 AP (stutter insensitive).
Stuttering acceptance computed with spot in 156 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Finished random walk after 122 steps, including 0 resets, run visited all 9 properties in 15 ms. (steps per millisecond=8 )
Knowledge obtained : [(AND (NOT p1) p2 p0), (X (NOT (AND (NOT p1) p0 (NOT p2)))), (X (AND (NOT p1) p2)), (X (AND (NOT p1) p0 p2)), (X (NOT p1)), (X (NOT (AND p0 (NOT p2)))), (X (NOT (AND (NOT p1) (NOT p2)))), (X (AND p0 p2)), (X p0), (X (AND (NOT p1) p0)), (X (X (NOT (AND (NOT p1) p0 (NOT p2))))), (X (X (AND (NOT p1) p2))), (X (X (AND (NOT p1) p0 p2))), (X (X (NOT p1))), (X (X (NOT (AND p0 (NOT p2))))), (X (X (NOT (AND (NOT p1) (NOT p2))))), (X (X (AND p0 p2))), (X (X p0)), (X (X (AND (NOT p1) p0)))]
False Knowledge obtained : [(F (NOT p0)), (F (NOT (AND p2 p0 (NOT p1)))), (F p1), (F (NOT (AND p0 (NOT p1)))), (F (NOT (AND p2 (NOT p1)))), (F (AND (NOT p2) (NOT p1))), (F (AND (NOT p2) p0 (NOT p1))), (F (NOT (AND p2 p0))), (F (AND (NOT p2) p0))]
Knowledge based reduction with 19 factoid took 1202 ms. Reduced automaton from 4 states, 9 edges and 3 AP (stutter insensitive) to 4 states, 9 edges and 3 AP (stutter insensitive).
Stuttering acceptance computed with spot in 206 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Stuttering acceptance computed with spot in 178 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Support contains 5 out of 10 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 10/10 places, 9/9 transitions.
Applied a total of 0 rules in 1 ms. Remains 10 /10 variables (removed 0) and now considering 9/9 (removed 0) transitions.
[2023-03-12 11:52:21] [INFO ] Invariant cache hit.
[2023-03-12 11:52:21] [INFO ] Dead Transitions using invariants and state equation in 31 ms found 0 transitions.
[2023-03-12 11:52:21] [INFO ] Invariant cache hit.
[2023-03-12 11:52:21] [INFO ] Implicit Places using invariants in 20 ms returned []
[2023-03-12 11:52:21] [INFO ] Invariant cache hit.
[2023-03-12 11:52:21] [INFO ] Implicit Places using invariants and state equation in 35 ms returned []
Implicit Place search using SMT with State Equation took 59 ms to find 0 implicit places.
[2023-03-12 11:52:21] [INFO ] Redundant transitions in 0 ms returned []
[2023-03-12 11:52:21] [INFO ] Invariant cache hit.
[2023-03-12 11:52:21] [INFO ] Dead Transitions using invariants and state equation in 26 ms found 0 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 125 ms. Remains : 10/10 places, 9/9 transitions.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Knowledge obtained : [(AND p2 (NOT p1) p0), (X (AND p2 p0)), (X (NOT (AND (NOT p2) (NOT p1)))), (X (NOT (AND (NOT p2) p0 (NOT p1)))), (X (NOT p1)), (X (AND p2 p0 (NOT p1))), (X (NOT (AND (NOT p2) p0))), (X p0), (X (AND p0 (NOT p1))), (X (AND p2 (NOT p1))), (X (X (AND p2 p0))), (X (X (NOT (AND (NOT p2) (NOT p1))))), (X (X (NOT (AND (NOT p2) p0 (NOT p1))))), (X (X (NOT p1))), (X (X (AND p2 p0 (NOT p1)))), (X (X (NOT (AND (NOT p2) p0)))), (X (X p0)), (X (X (AND p0 (NOT p1)))), (X (X (AND p2 (NOT p1))))]
False Knowledge obtained : []
Knowledge based reduction with 19 factoid took 1163 ms. Reduced automaton from 4 states, 9 edges and 3 AP (stutter insensitive) to 4 states, 9 edges and 3 AP (stutter insensitive).
Stuttering acceptance computed with spot in 181 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Finished random walk after 56 steps, including 0 resets, run visited all 9 properties in 2 ms. (steps per millisecond=28 )
Knowledge obtained : [(AND p2 (NOT p1) p0), (X (AND p2 p0)), (X (NOT (AND (NOT p2) (NOT p1)))), (X (NOT (AND (NOT p2) p0 (NOT p1)))), (X (NOT p1)), (X (AND p2 p0 (NOT p1))), (X (NOT (AND (NOT p2) p0))), (X p0), (X (AND p0 (NOT p1))), (X (AND p2 (NOT p1))), (X (X (AND p2 p0))), (X (X (NOT (AND (NOT p2) (NOT p1))))), (X (X (NOT (AND (NOT p2) p0 (NOT p1))))), (X (X (NOT p1))), (X (X (AND p2 p0 (NOT p1)))), (X (X (NOT (AND (NOT p2) p0)))), (X (X p0)), (X (X (AND p0 (NOT p1)))), (X (X (AND p2 (NOT p1))))]
False Knowledge obtained : [(F (NOT p0)), (F (NOT (AND p0 (NOT p1) p2))), (F p1), (F (NOT (AND p0 (NOT p1)))), (F (NOT (AND (NOT p1) p2))), (F (AND (NOT p1) (NOT p2))), (F (AND p0 (NOT p1) (NOT p2))), (F (NOT (AND p0 p2))), (F (AND p0 (NOT p2)))]
Knowledge based reduction with 19 factoid took 1229 ms. Reduced automaton from 4 states, 9 edges and 3 AP (stutter insensitive) to 4 states, 9 edges and 3 AP (stutter insensitive).
Stuttering acceptance computed with spot in 158 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Stuttering acceptance computed with spot in 164 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Stuttering acceptance computed with spot in 187 ms :[(AND (NOT p1) (NOT p2)), p0, (NOT p1), (AND p0 (NOT p2))]
Product exploration explored 100000 steps with 8440 reset in 292 ms.
Product exploration explored 100000 steps with 8410 reset in 266 ms.
Built C files in :
/tmp/ltsmin14809150805493149474
[2023-03-12 11:52:25] [INFO ] Computing symmetric may disable matrix : 9 transitions.
[2023-03-12 11:52:25] [INFO ] Computation of Complete disable matrix. took 1 ms. Total solver calls (SAT/UNSAT): 0(0/0)
[2023-03-12 11:52:25] [INFO ] Computing symmetric may enable matrix : 9 transitions.
[2023-03-12 11:52:25] [INFO ] Computation of Complete enable matrix. took 1 ms. Total solver calls (SAT/UNSAT): 0(0/0)
[2023-03-12 11:52:25] [INFO ] Computing Do-Not-Accords matrix : 9 transitions.
[2023-03-12 11:52:25] [INFO ] Computation of Completed DNA matrix. took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
[2023-03-12 11:52:25] [INFO ] Built C files in 8ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin14809150805493149474
Running compilation step : cd /tmp/ltsmin14809150805493149474;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202303021504/bin/limit_time.pl' '3' 'gcc' '-c' '-I/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202303021504/bin/include/' '-I.' '-std=c99' '-fPIC' '-O0' 'model.c'
Compilation finished in 255 ms.
Running link step : cd /tmp/ltsmin14809150805493149474;'gcc' '-shared' '-o' 'gal.so' 'model.o'
Link finished in 45 ms.
Running LTSmin : cd /tmp/ltsmin14809150805493149474;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202303021504/bin/pins2lts-mc-linux64' './gal.so' '--threads=8' '-p' '--pins-guards' '--when' '--hoa' '/tmp/stateBased17189143897224337009.hoa' '--buchi-type=spotba'
LTSmin run took 89 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-07 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-07 finished in 7861 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(F(p0)))'
Support contains 3 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 0 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
// Phase 1: matrix 10 rows 12 cols
[2023-03-12 11:52:25] [INFO ] Computed 6 place invariants in 0 ms
[2023-03-12 11:52:26] [INFO ] Dead Transitions using invariants and state equation in 61 ms found 0 transitions.
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Implicit Places using invariants in 32 ms returned []
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Implicit Places using invariants and state equation in 43 ms returned []
Implicit Place search using SMT with State Equation took 79 ms to find 0 implicit places.
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Dead Transitions using invariants and state equation in 42 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 184 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 86 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-08 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(AND (GEQ s1 2) (GEQ s3 1) (GEQ s5 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null][false, false]]
Product exploration explored 100000 steps with 50000 reset in 133 ms.
Product exploration explored 100000 steps with 50000 reset in 147 ms.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Knowledge obtained : [p0, (X p0), (X (X p0))]
False Knowledge obtained : []
Property proved to be true thanks to knowledge :(X p0)
Knowledge based reduction with 3 factoid took 87 ms. Reduced automaton from 2 states, 2 edges and 1 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA DrinkVendingMachine-COL-10-LTLFireability-08 TRUE TECHNIQUES KNOWLEDGE
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-08 finished in 655 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(G((p0&&X(G(p1))))))'
Support contains 4 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 1 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Dead Transitions using invariants and state equation in 31 ms found 0 transitions.
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Implicit Places using invariants in 23 ms returned []
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Implicit Places using invariants and state equation in 36 ms returned []
Implicit Place search using SMT with State Equation took 61 ms to find 0 implicit places.
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:26] [INFO ] Dead Transitions using invariants and state equation in 38 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 134 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 170 ms :[true, (OR (NOT p1) (NOT p0)), (OR (NOT p0) (NOT p1)), (OR (NOT p1) (NOT p0))]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-09 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 0}, { cond=p0, acceptance={} source=2 dest: 3}], [{ cond=(OR (NOT p0) (NOT p1)), acceptance={} source=3 dest: 0}, { cond=(AND p0 p1), acceptance={} source=3 dest: 3}]], initial=1, aps=[p0:(OR (LT s1 1) (LT s3 1) (LT s6 1)), p1:(AND (OR (LT s1 1) (LT s3 1) (LT s6 1)) (LT s0 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null][false, false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 0 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-09 finished in 328 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((G(F(p0))||G(p1)))'
Support contains 3 out of 12 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 0 ms
Reduce places removed 6 places and 0 transitions.
Iterating global reduction 0 with 9 rules applied. Total rules applied 9 place count 6 transition count 7
Applied a total of 9 rules in 2 ms. Remains 6 /12 variables (removed 6) and now considering 7/10 (removed 3) transitions.
// Phase 1: matrix 7 rows 6 cols
[2023-03-12 11:52:26] [INFO ] Computed 3 place invariants in 1 ms
[2023-03-12 11:52:26] [INFO ] Dead Transitions using invariants and state equation in 24 ms found 0 transitions.
[2023-03-12 11:52:26] [INFO ] Invariant cache hit.
[2023-03-12 11:52:27] [INFO ] Implicit Places using invariants in 23 ms returned []
[2023-03-12 11:52:27] [INFO ] Invariant cache hit.
[2023-03-12 11:52:27] [INFO ] Implicit Places using invariants and state equation in 30 ms returned []
Implicit Place search using SMT with State Equation took 56 ms to find 0 implicit places.
[2023-03-12 11:52:27] [INFO ] Redundant transitions in 25 ms returned []
[2023-03-12 11:52:27] [INFO ] Invariant cache hit.
[2023-03-12 11:52:27] [INFO ] Dead Transitions using invariants and state equation in 29 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 6/12 places, 7/10 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 146 ms. Remains : 6/12 places, 7/10 transitions.
Stuttering acceptance computed with spot in 150 ms :[(AND (NOT p1) (NOT p0)), (NOT p0), (NOT p0)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-10 automaton TGBA Formula[mat=[[{ cond=p1, acceptance={} source=0 dest: 0}, { cond=(AND (NOT p0) (NOT p1)), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p0), acceptance={} source=2 dest: 1}, { cond=true, acceptance={} source=2 dest: 2}]], initial=0, aps=[p1:(OR (LT s0 1) (AND (GEQ s3 1) (GEQ s4 1))), p0:(AND (GEQ s3 1) (GEQ s4 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null, null][true, true, true]]
Product exploration explored 100000 steps with 2365 reset in 198 ms.
Stack based approach found an accepted trace after 14767 steps with 331 reset with depth 128 and stack size 94 in 39 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-10 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-10 finished in 550 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(p0)))'
Support contains 4 out of 12 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Deduced a syphon composed of 2 places in 0 ms
Reduce places removed 4 places and 0 transitions.
Iterating global reduction 0 with 6 rules applied. Total rules applied 6 place count 8 transition count 8
Applied a total of 6 rules in 2 ms. Remains 8 /12 variables (removed 4) and now considering 8/10 (removed 2) transitions.
// Phase 1: matrix 8 rows 8 cols
[2023-03-12 11:52:27] [INFO ] Computed 4 place invariants in 1 ms
[2023-03-12 11:52:27] [INFO ] Dead Transitions using invariants and state equation in 27 ms found 0 transitions.
[2023-03-12 11:52:27] [INFO ] Invariant cache hit.
[2023-03-12 11:52:27] [INFO ] Implicit Places using invariants in 23 ms returned []
[2023-03-12 11:52:27] [INFO ] Invariant cache hit.
[2023-03-12 11:52:27] [INFO ] Implicit Places using invariants and state equation in 33 ms returned []
Implicit Place search using SMT with State Equation took 59 ms to find 0 implicit places.
[2023-03-12 11:52:27] [INFO ] Redundant transitions in 16 ms returned []
[2023-03-12 11:52:27] [INFO ] Invariant cache hit.
[2023-03-12 11:52:27] [INFO ] Dead Transitions using invariants and state equation in 25 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 8/12 places, 8/10 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 139 ms. Remains : 8/12 places, 8/10 transitions.
Stuttering acceptance computed with spot in 307 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-12 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(AND (GEQ s1 3) (GEQ s3 1) (GEQ s4 1) (GEQ s1 1) (GEQ s5 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null][true, true]]
Product exploration explored 100000 steps with 2912 reset in 159 ms.
Stack based approach found an accepted trace after 15 steps with 0 reset with depth 16 and stack size 16 in 1 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-12 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-12 finished in 627 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X((F(G(p0)) U p1)))'
Support contains 4 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 1 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
// Phase 1: matrix 10 rows 12 cols
[2023-03-12 11:52:28] [INFO ] Computed 6 place invariants in 1 ms
[2023-03-12 11:52:28] [INFO ] Dead Transitions using invariants and state equation in 28 ms found 0 transitions.
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Implicit Places using invariants in 22 ms returned []
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Implicit Places using invariants and state equation in 27 ms returned []
Implicit Place search using SMT with State Equation took 52 ms to find 0 implicit places.
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Dead Transitions using invariants and state equation in 26 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 109 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 127 ms :[(NOT p1), (NOT p1), (NOT p0)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-13 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=(NOT p1), acceptance={0} source=1 dest: 1}, { cond=(NOT p1), acceptance={} source=1 dest: 2}], [{ cond=p0, acceptance={} source=2 dest: 2}, { cond=(NOT p0), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p1:(AND (GEQ s1 2) (GEQ s3 1) (GEQ s5 1)), p0:(AND (GEQ s3 1) (GEQ s7 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 50000 reset in 136 ms.
Product exploration explored 100000 steps with 50000 reset in 161 ms.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Knowledge obtained : [(AND p1 p0), (X p1), (X (X p1)), (X (X p0))]
False Knowledge obtained : []
Property proved to be true thanks to knowledge :(X p1)
Knowledge based reduction with 4 factoid took 79 ms. Reduced automaton from 3 states, 5 edges and 2 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA DrinkVendingMachine-COL-10-LTLFireability-13 TRUE TECHNIQUES KNOWLEDGE
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-13 finished in 631 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X(F(p0))||G(!p1)))'
Support contains 4 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 1 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Dead Transitions using invariants and state equation in 29 ms found 0 transitions.
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Implicit Places using invariants in 22 ms returned []
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Implicit Places using invariants and state equation in 31 ms returned []
Implicit Place search using SMT with State Equation took 55 ms to find 0 implicit places.
[2023-03-12 11:52:28] [INFO ] Invariant cache hit.
[2023-03-12 11:52:28] [INFO ] Dead Transitions using invariants and state equation in 26 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 112 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 134 ms :[(NOT p0), (AND (NOT p0) p1), (AND (NOT p0) p1)]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-14 automaton TGBA Formula[mat=[[{ cond=(NOT p0), acceptance={0} source=0 dest: 0}], [{ cond=p1, acceptance={} source=1 dest: 0}, { cond=(NOT p1), acceptance={} source=1 dest: 2}], [{ cond=(AND p1 (NOT p0)), acceptance={} source=2 dest: 0}, { cond=(AND (NOT p1) (NOT p0)), acceptance={} source=2 dest: 2}]], initial=1, aps=[p0:(AND (GEQ s3 1) (GEQ s7 1)), p1:(OR (LT s1 1) (LT s3 1) (LT s6 1))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 50000 reset in 100 ms.
Product exploration explored 100000 steps with 50000 reset in 203 ms.
Computed a total of 0 stabilizing places and 0 stable transitions
Computed a total of 0 stabilizing places and 0 stable transitions
Knowledge obtained : [(AND p0 (NOT p1)), (X (NOT (AND p1 (NOT p0)))), (X (NOT (AND (NOT p1) (NOT p0)))), (X p0), (X (X (NOT (AND p1 (NOT p0))))), (X (X (NOT (AND (NOT p1) (NOT p0))))), (X (X p0))]
False Knowledge obtained : []
Property proved to be true thanks to knowledge :(X p0)
Knowledge based reduction with 7 factoid took 170 ms. Reduced automaton from 3 states, 5 edges and 2 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA DrinkVendingMachine-COL-10-LTLFireability-14 TRUE TECHNIQUES KNOWLEDGE
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-14 finished in 739 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(F(!p0))))'
Support contains 1 out of 12 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 12/12 places, 10/10 transitions.
Applied a total of 0 rules in 0 ms. Remains 12 /12 variables (removed 0) and now considering 10/10 (removed 0) transitions.
[2023-03-12 11:52:29] [INFO ] Invariant cache hit.
[2023-03-12 11:52:29] [INFO ] Dead Transitions using invariants and state equation in 29 ms found 0 transitions.
[2023-03-12 11:52:29] [INFO ] Invariant cache hit.
[2023-03-12 11:52:29] [INFO ] Implicit Places using invariants in 29 ms returned []
[2023-03-12 11:52:29] [INFO ] Invariant cache hit.
[2023-03-12 11:52:29] [INFO ] Implicit Places using invariants and state equation in 36 ms returned []
Implicit Place search using SMT with State Equation took 67 ms to find 0 implicit places.
[2023-03-12 11:52:29] [INFO ] Invariant cache hit.
[2023-03-12 11:52:29] [INFO ] Dead Transitions using invariants and state equation in 36 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 137 ms. Remains : 12/12 places, 10/10 transitions.
Stuttering acceptance computed with spot in 139 ms :[p0, p0, p0]
Running random walk in product with property : DrinkVendingMachine-COL-10-LTLFireability-15 automaton TGBA Formula[mat=[[{ cond=p0, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 0}], [{ cond=true, acceptance={} source=2 dest: 1}]], initial=2, aps=[p0:(GEQ s2 1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Product exploration explored 100000 steps with 16 reset in 166 ms.
Stack based approach found an accepted trace after 20 steps with 0 reset with depth 21 and stack size 21 in 0 ms.
FORMULA DrinkVendingMachine-COL-10-LTLFireability-15 FALSE TECHNIQUES STACK_TEST
Treatment of property DrinkVendingMachine-COL-10-LTLFireability-15 finished in 464 ms.
All properties solved by simple procedures.
Total runtime 18329 ms.
BK_STOP 1678621951133
--------------------
content from stderr:
+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ LTLFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution LTLFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination LTLFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
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="DrinkVendingMachine-COL-10"
export BK_EXAMINATION="LTLFireability"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"
# this is specific to your benchmark or test
export BIN_DIR="$HOME/BenchKit/bin"
# remove the execution directoty if it exists (to avoid increse of .vmdk images)
if [ -d execution ] ; then
rm -rf execution
fi
# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5348"
echo " Executing tool itstools"
echo " Input is DrinkVendingMachine-COL-10, examination is LTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r133-smll-167819411400580"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/DrinkVendingMachine-COL-10.tgz
mv DrinkVendingMachine-COL-10 execution
cd execution
if [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "UpperBounds" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] || [ "LTLFireability" = "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 [ "LTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLFireability" != "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 "LTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLFireability.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 [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLFireability"
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 ;