/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-MCR.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d9e330d [2020-02-11 01:19:08,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-02-11 01:19:08,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-02-11 01:19:08,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-02-11 01:19:08,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-02-11 01:19:08,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-02-11 01:19:08,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-02-11 01:19:08,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-02-11 01:19:08,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-02-11 01:19:08,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-02-11 01:19:08,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-02-11 01:19:08,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-02-11 01:19:08,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-02-11 01:19:08,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-02-11 01:19:08,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-02-11 01:19:08,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-02-11 01:19:08,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-02-11 01:19:08,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-02-11 01:19:08,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-02-11 01:19:08,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-02-11 01:19:08,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-02-11 01:19:08,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-02-11 01:19:08,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-02-11 01:19:08,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-02-11 01:19:08,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-02-11 01:19:08,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-02-11 01:19:08,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-02-11 01:19:08,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-02-11 01:19:08,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-MCR.epf [2020-02-11 01:19:08,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-02-11 01:19:08,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-02-11 01:19:08,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-02-11 01:19:08,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-02-11 01:19:08,388 INFO L138 SettingsManager]: * Use SBE=true [2020-02-11 01:19:08,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-02-11 01:19:08,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-02-11 01:19:08,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-02-11 01:19:08,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-02-11 01:19:08,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-02-11 01:19:08,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-02-11 01:19:08,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-02-11 01:19:08,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-02-11 01:19:08,390 INFO L138 SettingsManager]: * sizeof long double=12 [2020-02-11 01:19:08,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-02-11 01:19:08,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-02-11 01:19:08,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-02-11 01:19:08,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-02-11 01:19:08,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-02-11 01:19:08,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-02-11 01:19:08,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-02-11 01:19:08,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-11 01:19:08,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-02-11 01:19:08,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-02-11 01:19:08,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-02-11 01:19:08,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-02-11 01:19:08,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-02-11 01:19:08,392 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-02-11 01:19:08,393 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-02-11 01:19:08,393 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-02-11 01:19:08,393 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-02-11 01:19:08,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-02-11 01:19:08,664 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-02-11 01:19:08,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-02-11 01:19:08,680 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-02-11 01:19:08,682 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-02-11 01:19:08,682 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-02-11 01:19:08,683 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2020-02-11 01:19:08,683 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2020-02-11 01:19:08,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-02-11 01:19:08,717 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-02-11 01:19:08,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-02-11 01:19:08,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-02-11 01:19:08,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-02-11 01:19:08,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,752 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-02-11 01:19:08,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-02-11 01:19:08,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-02-11 01:19:08,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-02-11 01:19:08,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... [2020-02-11 01:19:08,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-02-11 01:19:08,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-02-11 01:19:08,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-02-11 01:19:08,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-02-11 01:19:08,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-11 01:19:08,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-02-11 01:19:08,840 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-02-11 01:19:08,840 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-02-11 01:19:08,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-02-11 01:19:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-02-11 01:19:08,841 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-02-11 01:19:08,841 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2020-02-11 01:19:08,841 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2020-02-11 01:19:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2020-02-11 01:19:08,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-02-11 01:19:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-02-11 01:19:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-02-11 01:19:08,842 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-02-11 01:19:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-02-11 01:19:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-02-11 01:19:08,844 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-02-11 01:19:09,015 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-02-11 01:19:09,015 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-02-11 01:19:09,019 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:19:09 BoogieIcfgContainer [2020-02-11 01:19:09,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-02-11 01:19:09,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-02-11 01:19:09,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-02-11 01:19:09,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-02-11 01:19:09,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:19:08" (1/2) ... [2020-02-11 01:19:09,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b28e70a and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:19:09, skipping insertion in model container [2020-02-11 01:19:09,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:19:09" (2/2) ... [2020-02-11 01:19:09,031 INFO L109 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2020-02-11 01:19:09,043 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-02-11 01:19:09,051 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-02-11 01:19:09,052 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-02-11 01:19:09,256 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-02-11 01:19:09,276 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-02-11 01:19:09,277 INFO L376 AbstractCegarLoop]: Hoare is false [2020-02-11 01:19:09,277 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-02-11 01:19:09,277 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-02-11 01:19:09,277 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-02-11 01:19:09,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-02-11 01:19:09,278 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-02-11 01:19:09,278 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-02-11 01:19:09,289 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 36 places, 35 transitions [2020-02-11 01:19:09,336 INFO L129 PetriNetUnfolder]: 17/47 cut-off events. [2020-02-11 01:19:09,336 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-02-11 01:19:09,342 INFO L76 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 47 events. 17/47 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 124 event pairs. 0/46 useless extension candidates. Maximal degree in co-relation 41. Up to 12 conditions per place. [2020-02-11 01:19:09,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 35 transitions [2020-02-11 01:19:09,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions [2020-02-11 01:19:09,369 INFO L129 PetriNetUnfolder]: 17/44 cut-off events. [2020-02-11 01:19:09,370 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-02-11 01:19:09,370 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-11 01:19:09,371 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-11 01:19:09,371 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-11 01:19:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-11 01:19:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1438249779, now seen corresponding path program 1 times [2020-02-11 01:19:09,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-11 01:19:09,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898694532] [2020-02-11 01:19:09,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-11 01:19:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-11 01:19:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-11 01:19:09,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898694532] [2020-02-11 01:19:09,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-11 01:19:09,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-11 01:19:09,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1473951029] [2020-02-11 01:19:09,551 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-02-11 01:19:09,568 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-02-11 01:19:09,619 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-02-11 01:19:09,620 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-02-11 01:19:09,633 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2020-02-11 01:19:09,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-11 01:19:09,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-11 01:19:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-11 01:19:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-11 01:19:09,651 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2020-02-11 01:19:09,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions. Second operand 3 states. [2020-02-11 01:19:09,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-11 01:19:09,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2020-02-11 01:19:09,655 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-11 01:19:09,701 INFO L129 PetriNetUnfolder]: 14/41 cut-off events. [2020-02-11 01:19:09,701 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2020-02-11 01:19:09,703 INFO L76 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 41 events. 14/41 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 87 event pairs. 1/42 useless extension candidates. Maximal degree in co-relation 39. Up to 12 conditions per place. [2020-02-11 01:19:09,705 INFO L145 encePairwiseOnDemand]: 33/35 looper letters, 3 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2020-02-11 01:19:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-11 01:19:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-11 01:19:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2020-02-11 01:19:09,713 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-02-11 01:19:09,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2020-02-11 01:19:09,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2020-02-11 01:19:09,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-11 01:19:09,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2020-02-11 01:19:09,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-11 01:19:09,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-11 01:19:09,729 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-11 01:19:09,731 INFO L178 Difference]: Start difference. First operand has 30 places, 29 transitions. Second operand 3 states and 95 transitions. [2020-02-11 01:19:09,733 INFO L206 Difference]: Finished difference. Result has 32 places, 28 transitions [2020-02-11 01:19:09,736 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2020-02-11 01:19:09,737 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 32 places, 28 transitions [2020-02-11 01:19:09,772 INFO L129 PetriNetUnfolder]: 14/41 cut-off events. [2020-02-11 01:19:09,772 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2020-02-11 01:19:09,775 INFO L76 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 41 events. 14/41 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 89 event pairs. 0/41 useless extension candidates. Maximal degree in co-relation 71. Up to 12 conditions per place. [2020-02-11 01:19:09,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 28 transitions [2020-02-11 01:19:09,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 28 transitions [2020-02-11 01:19:09,779 INFO L479 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions [2020-02-11 01:19:09,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-11 01:19:09,792 INFO L129 PetriNetUnfolder]: 14/40 cut-off events. [2020-02-11 01:19:09,792 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2020-02-11 01:19:09,792 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-11 01:19:09,793 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-11 01:19:09,793 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-11 01:19:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-11 01:19:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1641717773, now seen corresponding path program 1 times [2020-02-11 01:19:09,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-11 01:19:09,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662720269] [2020-02-11 01:19:09,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-11 01:19:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-11 01:19:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-11 01:19:09,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662720269] [2020-02-11 01:19:09,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-11 01:19:09,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-11 01:19:09,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1139237467] [2020-02-11 01:19:09,839 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-02-11 01:19:09,841 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-02-11 01:19:09,861 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-02-11 01:19:09,862 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-02-11 01:19:09,871 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2020-02-11 01:19:09,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-11 01:19:09,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-11 01:19:09,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-11 01:19:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-11 01:19:09,882 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2020-02-11 01:19:09,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions. Second operand 3 states. [2020-02-11 01:19:09,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-11 01:19:09,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2020-02-11 01:19:09,882 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-11 01:19:09,910 INFO L129 PetriNetUnfolder]: 3/23 cut-off events. [2020-02-11 01:19:09,910 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-02-11 01:19:09,911 INFO L76 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 23 events. 3/23 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs. 6/29 useless extension candidates. Maximal degree in co-relation 37. Up to 4 conditions per place. [2020-02-11 01:19:09,912 INFO L145 encePairwiseOnDemand]: 31/35 looper letters, 1 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2020-02-11 01:19:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-11 01:19:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-11 01:19:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2020-02-11 01:19:09,920 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-02-11 01:19:09,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2020-02-11 01:19:09,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2020-02-11 01:19:09,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-11 01:19:09,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2020-02-11 01:19:09,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-11 01:19:09,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-11 01:19:09,924 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-11 01:19:09,924 INFO L178 Difference]: Start difference. First operand has 32 places, 28 transitions. Second operand 3 states and 95 transitions. [2020-02-11 01:19:09,927 INFO L206 Difference]: Finished difference. Result has 34 places, 22 transitions [2020-02-11 01:19:09,928 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2020-02-11 01:19:09,931 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 34 places, 22 transitions [2020-02-11 01:19:09,943 INFO L129 PetriNetUnfolder]: 3/23 cut-off events. [2020-02-11 01:19:09,944 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-11 01:19:09,944 INFO L76 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 23 events. 3/23 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs. 0/23 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2020-02-11 01:19:09,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 22 transitions [2020-02-11 01:19:09,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 22 transitions [2020-02-11 01:19:09,952 INFO L479 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions [2020-02-11 01:19:09,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-11 01:19:09,962 INFO L129 PetriNetUnfolder]: 3/22 cut-off events. [2020-02-11 01:19:09,962 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-11 01:19:09,963 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-11 01:19:09,963 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-11 01:19:09,963 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-11 01:19:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-11 01:19:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1774682987, now seen corresponding path program 1 times [2020-02-11 01:19:09,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-11 01:19:09,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060406469] [2020-02-11 01:19:09,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-11 01:19:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-11 01:19:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-11 01:19:10,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060406469] [2020-02-11 01:19:10,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-11 01:19:10,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-11 01:19:10,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1701624074] [2020-02-11 01:19:10,002 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-02-11 01:19:10,003 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-02-11 01:19:10,017 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-02-11 01:19:10,018 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-02-11 01:19:10,020 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2020-02-11 01:19:10,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-11 01:19:10,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-11 01:19:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-11 01:19:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-11 01:19:10,024 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2020-02-11 01:19:10,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions. Second operand 3 states. [2020-02-11 01:19:10,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-11 01:19:10,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2020-02-11 01:19:10,025 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-11 01:19:10,043 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-02-11 01:19:10,043 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2020-02-11 01:19:10,043 INFO L76 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 17 events. 0/17 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs. 2/19 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2020-02-11 01:19:10,044 INFO L145 encePairwiseOnDemand]: 32/35 looper letters, 1 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2020-02-11 01:19:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-11 01:19:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-11 01:19:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2020-02-11 01:19:10,046 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2020-02-11 01:19:10,046 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2020-02-11 01:19:10,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2020-02-11 01:19:10,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-11 01:19:10,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2020-02-11 01:19:10,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-11 01:19:10,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-11 01:19:10,048 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-11 01:19:10,048 INFO L178 Difference]: Start difference. First operand has 34 places, 22 transitions. Second operand 3 states and 94 transitions. [2020-02-11 01:19:10,049 INFO L206 Difference]: Finished difference. Result has 36 places, 17 transitions [2020-02-11 01:19:10,049 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=36, PETRI_TRANSITIONS=17} [2020-02-11 01:19:10,049 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 36 places, 17 transitions [2020-02-11 01:19:10,053 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-02-11 01:19:10,054 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-02-11 01:19:10,054 INFO L76 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 17 events. 0/17 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs. 0/17 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2020-02-11 01:19:10,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 17 transitions [2020-02-11 01:19:10,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 17 transitions [2020-02-11 01:19:10,055 INFO L479 AbstractCegarLoop]: Abstraction has has 36 places, 17 transitions [2020-02-11 01:19:10,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-11 01:19:10,059 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2020-02-11 01:19:10,060 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-02-11 01:19:10,060 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-11 01:19:10,060 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-11 01:19:10,060 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-11 01:19:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-11 01:19:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1038889903, now seen corresponding path program 1 times [2020-02-11 01:19:10,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-11 01:19:10,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132227359] [2020-02-11 01:19:10,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-11 01:19:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-11 01:19:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-11 01:19:10,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132227359] [2020-02-11 01:19:10,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-11 01:19:10,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-02-11 01:19:10,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827653220] [2020-02-11 01:19:10,285 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-02-11 01:19:10,286 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-02-11 01:19:10,293 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-02-11 01:19:10,293 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-02-11 01:19:10,970 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-02-11 01:19:11,280 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 40 times. [2020-02-11 01:19:11,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-02-11 01:19:11,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-11 01:19:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-02-11 01:19:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-02-11 01:19:11,283 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2020-02-11 01:19:11,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 17 transitions. Second operand 27 states. [2020-02-11 01:19:11,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-11 01:19:11,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2020-02-11 01:19:11,284 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-11 01:19:12,828 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-02-11 01:19:13,871 INFO L129 PetriNetUnfolder]: 52/169 cut-off events. [2020-02-11 01:19:13,872 INFO L130 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2020-02-11 01:19:13,873 INFO L76 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 169 events. 52/169 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 887 event pairs. 1/170 useless extension candidates. Maximal degree in co-relation 328. Up to 27 conditions per place. [2020-02-11 01:19:13,876 INFO L145 encePairwiseOnDemand]: 27/35 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2020-02-11 01:19:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-02-11 01:19:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-02-11 01:19:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 580 transitions. [2020-02-11 01:19:13,882 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.47346938775510206 [2020-02-11 01:19:13,883 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 580 transitions. [2020-02-11 01:19:13,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 580 transitions. [2020-02-11 01:19:13,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-11 01:19:13,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 580 transitions. [2020-02-11 01:19:13,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 36 states. [2020-02-11 01:19:13,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 36 states. [2020-02-11 01:19:13,892 INFO L81 ComplementDD]: Finished complementDD. Result 36 states. [2020-02-11 01:19:13,892 INFO L178 Difference]: Start difference. First operand has 36 places, 17 transitions. Second operand 35 states and 580 transitions. [2020-02-11 01:19:13,893 INFO L206 Difference]: Finished difference. Result has 70 places, 0 transitions [2020-02-11 01:19:13,893 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2020-02-11 01:19:13,894 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 70 places, 0 transitions [2020-02-11 01:19:13,894 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-11 01:19:13,894 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-11 01:19:13,894 INFO L76 FinitePrefix]: Finished finitePrefix Result has 9 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2020-02-11 01:19:13,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 0 transitions [2020-02-11 01:19:13,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions [2020-02-11 01:19:13,895 INFO L479 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions [2020-02-11 01:19:13,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-02-11 01:19:13,895 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-11 01:19:13,896 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-11 01:19:13,907 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:19:13 BasicIcfg [2020-02-11 01:19:13,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-02-11 01:19:13,910 INFO L168 Benchmark]: Toolchain (without parser) took 5193.68 ms. Allocated memory was 141.6 MB in the beginning and 256.4 MB in the end (delta: 114.8 MB). Free memory was 120.2 MB in the beginning and 187.7 MB in the end (delta: -67.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2020-02-11 01:19:13,911 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-02-11 01:19:13,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.06 ms. Allocated memory is still 141.6 MB. Free memory was 120.0 MB in the beginning and 118.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-02-11 01:19:13,913 INFO L168 Benchmark]: Boogie Preprocessor took 18.58 ms. Allocated memory is still 141.6 MB. Free memory was 118.3 MB in the beginning and 117.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-02-11 01:19:13,913 INFO L168 Benchmark]: RCFGBuilder took 248.19 ms. Allocated memory is still 141.6 MB. Free memory was 117.3 MB in the beginning and 106.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-02-11 01:19:13,914 INFO L168 Benchmark]: TraceAbstraction took 4887.02 ms. Allocated memory was 141.6 MB in the beginning and 256.4 MB in the end (delta: 114.8 MB). Free memory was 105.8 MB in the beginning and 187.7 MB in the end (delta: -81.8 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-02-11 01:19:13,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.06 ms. Allocated memory is still 141.6 MB. Free memory was 120.0 MB in the beginning and 118.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.58 ms. Allocated memory is still 141.6 MB. Free memory was 118.3 MB in the beginning and 117.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 248.19 ms. Allocated memory is still 141.6 MB. Free memory was 117.3 MB in the beginning and 106.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4887.02 ms. Allocated memory was 141.6 MB in the beginning and 256.4 MB in the end (delta: 114.8 MB). Free memory was 105.8 MB in the beginning and 187.7 MB in the end (delta: -81.8 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 4.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 127 SDslu, 228 SDs, 0 SdLazy, 404 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 4544 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...