/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-abd8500 [2020-01-16 23:37:23,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-01-16 23:37:23,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-01-16 23:37:23,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-01-16 23:37:23,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-01-16 23:37:23,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-01-16 23:37:23,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-01-16 23:37:23,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-01-16 23:37:23,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-01-16 23:37:23,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-01-16 23:37:23,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-01-16 23:37:23,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-01-16 23:37:23,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-01-16 23:37:23,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-01-16 23:37:23,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-01-16 23:37:23,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-01-16 23:37:23,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-01-16 23:37:23,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-01-16 23:37:23,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-01-16 23:37:23,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-01-16 23:37:23,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-01-16 23:37:23,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-01-16 23:37:23,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-01-16 23:37:23,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-01-16 23:37:23,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-01-16 23:37:23,270 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 [2020-01-16 23:37:23,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-01-16 23:37:23,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-01-16 23:37:23,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-01-16 23:37:23,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-01-16 23:37:23,290 INFO L138 SettingsManager]: * Use SBE=true [2020-01-16 23:37:23,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-01-16 23:37:23,290 INFO L138 SettingsManager]: * sizeof long=4 [2020-01-16 23:37:23,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-01-16 23:37:23,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-01-16 23:37:23,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-01-16 23:37:23,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-01-16 23:37:23,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-01-16 23:37:23,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-01-16 23:37:23,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-01-16 23:37:23,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-01-16 23:37:23,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-01-16 23:37:23,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-01-16 23:37:23,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-01-16 23:37:23,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-01-16 23:37:23,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-01-16 23:37:23,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-01-16 23:37:23,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-01-16 23:37:23,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-01-16 23:37:23,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-01-16 23:37:23,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-01-16 23:37:23,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-01-16 23:37:23,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-01-16 23:37:23,295 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-01-16 23:37:23,295 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-01-16 23:37:23,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-01-16 23:37:23,295 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-01-16 23:37:23,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-01-16 23:37:23,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-01-16 23:37:23,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-01-16 23:37:23,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-01-16 23:37:23,626 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-01-16 23:37:23,626 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-01-16 23:37:23,627 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2020-01-16 23:37:23,627 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2020-01-16 23:37:23,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-01-16 23:37:23,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-01-16 23:37:23,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-01-16 23:37:23,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-01-16 23:37:23,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-01-16 23:37:23,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-01-16 23:37:23,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-01-16 23:37:23,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-01-16 23:37:23,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-01-16 23:37:23,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/1) ... [2020-01-16 23:37:23,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-01-16 23:37:23,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-01-16 23:37:23,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-01-16 23:37:23,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-01-16 23:37:23,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (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 [2020-01-16 23:37:23,777 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-01-16 23:37:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-01-16 23:37:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-01-16 23:37:23,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-01-16 23:37:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-01-16 23:37:23,778 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-01-16 23:37:23,778 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2020-01-16 23:37:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2020-01-16 23:37:23,779 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2020-01-16 23:37:23,779 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-01-16 23:37:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-01-16 23:37:23,779 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-01-16 23:37:23,779 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-01-16 23:37:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-01-16 23:37:23,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-01-16 23:37:23,781 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-01-16 23:37:23,951 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-01-16 23:37:23,952 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2020-01-16 23:37:23,953 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 11:37:23 BoogieIcfgContainer [2020-01-16 23:37:23,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-01-16 23:37:23,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-01-16 23:37:23,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-01-16 23:37:23,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-01-16 23:37:23,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.01 11:37:23" (1/2) ... [2020-01-16 23:37:23,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18987ebc and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.01 11:37:23, skipping insertion in model container [2020-01-16 23:37:23,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.01 11:37:23" (2/2) ... [2020-01-16 23:37:23,965 INFO L109 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2020-01-16 23:37:23,975 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-01-16 23:37:23,984 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-01-16 23:37:23,985 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-01-16 23:37:24,209 INFO L250 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-01-16 23:37:24,230 INFO L374 AbstractCegarLoop]: Interprodecural is true [2020-01-16 23:37:24,230 INFO L375 AbstractCegarLoop]: Hoare is false [2020-01-16 23:37:24,231 INFO L376 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-01-16 23:37:24,231 INFO L377 AbstractCegarLoop]: Backedges is MCR [2020-01-16 23:37:24,231 INFO L378 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-01-16 23:37:24,231 INFO L379 AbstractCegarLoop]: Difference is false [2020-01-16 23:37:24,231 INFO L380 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-01-16 23:37:24,231 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-01-16 23:37:24,328 INFO L129 PetriNetUnfolder]: 17/44 cut-off events. [2020-01-16 23:37:24,329 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-01-16 23:37:24,330 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:24,331 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:24,331 INFO L426 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash 350835277, now seen corresponding path program 1 times [2020-01-16 23:37:24,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:24,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741592884] [2020-01-16 23:37:24,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 23:37:24,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741592884] [2020-01-16 23:37:24,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:24,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:37:24,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739150002] [2020-01-16 23:37:24,512 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:24,524 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:24,570 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-01-16 23:37:24,570 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:24,586 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2020-01-16 23:37:24,587 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 23:37:24,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 23:37:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 23:37:24,606 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2020-01-16 23:37:24,609 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions. Second operand 3 states. [2020-01-16 23:37:24,609 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:24,609 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2020-01-16 23:37:24,611 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:24,640 INFO L129 PetriNetUnfolder]: 5/28 cut-off events. [2020-01-16 23:37:24,640 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2020-01-16 23:37:24,645 INFO L76 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 28 events. 5/28 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs. 7/34 useless extension candidates. Maximal degree in co-relation 32. Up to 6 conditions per place. [2020-01-16 23:37:24,646 INFO L123 encePairwiseOnDemand]: 31/35 looper letters, 1 selfloop transitions, 4 changer transitions [2020-01-16 23:37:24,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 23:37:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 23:37:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2020-01-16 23:37:24,659 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.9047619047619048 [2020-01-16 23:37:24,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2020-01-16 23:37:24,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2020-01-16 23:37:24,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:24,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2020-01-16 23:37:24,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 23:37:24,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 23:37:24,675 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 23:37:24,677 INFO L174 Difference]: Start difference. First operand has 36 places, 35 transitions. Second operand 3 states and 95 transitions. [2020-01-16 23:37:24,678 INFO L199 Difference]: Finished difference. Result has 38 places, 25 transitions [2020-01-16 23:37:24,681 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2020-01-16 23:37:24,683 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 38 places, 25 transitions [2020-01-16 23:37:24,683 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 38 places, 25 transitions [2020-01-16 23:37:24,694 INFO L129 PetriNetUnfolder]: 5/28 cut-off events. [2020-01-16 23:37:24,694 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-01-16 23:37:24,696 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 28 events. 5/28 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs. 0/27 useless extension candidates. Maximal degree in co-relation 37. Up to 6 conditions per place. [2020-01-16 23:37:24,701 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 6 of 38 places, 0 of 25 transitions, 2 of 94 flow. [2020-01-16 23:37:24,703 INFO L478 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions [2020-01-16 23:37:24,703 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 23:37:24,715 INFO L129 PetriNetUnfolder]: 5/26 cut-off events. [2020-01-16 23:37:24,715 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-01-16 23:37:24,716 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:24,716 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:24,716 INFO L426 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:24,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1058595605, now seen corresponding path program 1 times [2020-01-16 23:37:24,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:24,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389910149] [2020-01-16 23:37:24,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 23:37:24,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389910149] [2020-01-16 23:37:24,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:24,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:37:24,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [138597194] [2020-01-16 23:37:24,754 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:24,756 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:24,770 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-01-16 23:37:24,771 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:24,773 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2020-01-16 23:37:24,775 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 23:37:24,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:24,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 23:37:24,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 23:37:24,790 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2020-01-16 23:37:24,791 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions. Second operand 3 states. [2020-01-16 23:37:24,791 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:24,791 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2020-01-16 23:37:24,791 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:24,806 INFO L129 PetriNetUnfolder]: 3/25 cut-off events. [2020-01-16 23:37:24,807 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2020-01-16 23:37:24,808 INFO L76 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 25 events. 3/25 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs. 1/25 useless extension candidates. Maximal degree in co-relation 29. Up to 4 conditions per place. [2020-01-16 23:37:24,808 INFO L123 encePairwiseOnDemand]: 33/35 looper letters, 2 selfloop transitions, 2 changer transitions [2020-01-16 23:37:24,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 23:37:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 23:37:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2020-01-16 23:37:24,810 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2020-01-16 23:37:24,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2020-01-16 23:37:24,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2020-01-16 23:37:24,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:24,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2020-01-16 23:37:24,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 23:37:24,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 23:37:24,813 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 23:37:24,813 INFO L174 Difference]: Start difference. First operand has 32 places, 25 transitions. Second operand 3 states and 94 transitions. [2020-01-16 23:37:24,814 INFO L199 Difference]: Finished difference. Result has 34 places, 24 transitions [2020-01-16 23:37:24,814 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2020-01-16 23:37:24,815 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 34 places, 24 transitions [2020-01-16 23:37:24,815 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 34 places, 24 transitions [2020-01-16 23:37:24,823 INFO L129 PetriNetUnfolder]: 3/25 cut-off events. [2020-01-16 23:37:24,823 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 23:37:24,824 INFO L76 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 25 events. 3/25 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs. 0/24 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2020-01-16 23:37:24,825 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 34 places, 0 of 24 transitions, 1 of 89 flow. [2020-01-16 23:37:24,825 INFO L478 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions [2020-01-16 23:37:24,826 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 23:37:24,833 INFO L129 PetriNetUnfolder]: 3/23 cut-off events. [2020-01-16 23:37:24,833 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-01-16 23:37:24,833 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:24,833 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:24,834 INFO L426 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:24,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1371297673, now seen corresponding path program 1 times [2020-01-16 23:37:24,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:24,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27390743] [2020-01-16 23:37:24,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 23:37:24,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27390743] [2020-01-16 23:37:24,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:24,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-01-16 23:37:24,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1484721233] [2020-01-16 23:37:24,876 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:24,877 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:24,895 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-01-16 23:37:24,895 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:24,900 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2020-01-16 23:37:24,901 INFO L458 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-01-16 23:37:24,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:24,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-01-16 23:37:24,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-01-16 23:37:24,906 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 35 [2020-01-16 23:37:24,907 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions. Second operand 3 states. [2020-01-16 23:37:24,907 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:24,908 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 35 [2020-01-16 23:37:24,908 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:24,929 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2020-01-16 23:37:24,930 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2020-01-16 23:37:24,931 INFO L76 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 19 events. 0/19 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs. 2/20 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2020-01-16 23:37:24,932 INFO L123 encePairwiseOnDemand]: 32/35 looper letters, 1 selfloop transitions, 3 changer transitions [2020-01-16 23:37:24,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-01-16 23:37:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-01-16 23:37:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2020-01-16 23:37:24,934 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.8952380952380953 [2020-01-16 23:37:24,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2020-01-16 23:37:24,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2020-01-16 23:37:24,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:24,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2020-01-16 23:37:24,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-01-16 23:37:24,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-01-16 23:37:24,938 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-01-16 23:37:24,938 INFO L174 Difference]: Start difference. First operand has 33 places, 24 transitions. Second operand 3 states and 94 transitions. [2020-01-16 23:37:24,939 INFO L199 Difference]: Finished difference. Result has 35 places, 19 transitions [2020-01-16 23:37:24,939 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=35, PETRI_TRANSITIONS=19} [2020-01-16 23:37:24,940 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 35 places, 19 transitions [2020-01-16 23:37:24,941 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 35 places, 19 transitions [2020-01-16 23:37:24,953 INFO L129 PetriNetUnfolder]: 0/19 cut-off events. [2020-01-16 23:37:24,954 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-01-16 23:37:24,957 INFO L76 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 19 events. 0/19 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs. 0/18 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2020-01-16 23:37:24,958 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 1 of 35 places, 0 of 19 transitions, 1 of 65 flow. [2020-01-16 23:37:24,958 INFO L478 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions [2020-01-16 23:37:24,959 INFO L479 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-01-16 23:37:24,968 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-01-16 23:37:24,968 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-01-16 23:37:24,968 INFO L202 CegarLoopForPetriNet]: Found error trace [2020-01-16 23:37:24,969 INFO L210 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-01-16 23:37:24,969 INFO L426 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-01-16 23:37:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-01-16 23:37:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1269317739, now seen corresponding path program 1 times [2020-01-16 23:37:24,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-01-16 23:37:24,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970995056] [2020-01-16 23:37:24,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-01-16 23:37:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-01-16 23:37:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-01-16 23:37:25,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970995056] [2020-01-16 23:37:25,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-01-16 23:37:25,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-01-16 23:37:25,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783026827] [2020-01-16 23:37:25,219 INFO L124 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2020-01-16 23:37:25,221 INFO L189 pAbStrategyModuleMcr]: Started intersection. [2020-01-16 23:37:25,229 INFO L200 pAbStrategyModuleMcr]: Finished intersection with 162 states and 433 transitions. [2020-01-16 23:37:25,230 INFO L211 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2020-01-16 23:37:26,032 INFO L284 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 35 times. [2020-01-16 23:37:26,032 INFO L458 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-01-16 23:37:26,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-01-16 23:37:26,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-01-16 23:37:26,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-01-16 23:37:26,035 INFO L387 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2020-01-16 23:37:26,035 INFO L91 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions. Second operand 24 states. [2020-01-16 23:37:26,035 INFO L100 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-01-16 23:37:26,035 INFO L101 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2020-01-16 23:37:26,036 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-01-16 23:37:27,421 INFO L129 PetriNetUnfolder]: 45/136 cut-off events. [2020-01-16 23:37:27,421 INFO L130 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2020-01-16 23:37:27,423 INFO L76 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 136 events. 45/136 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 591 event pairs. 0/136 useless extension candidates. Maximal degree in co-relation 221. Up to 18 conditions per place. [2020-01-16 23:37:27,424 INFO L123 encePairwiseOnDemand]: 27/35 looper letters, 26 selfloop transitions, 45 changer transitions [2020-01-16 23:37:27,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-01-16 23:37:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-01-16 23:37:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 407 transitions. [2020-01-16 23:37:27,427 INFO L434 CegarLoopForPetriNet]: DFA transition density 0.4845238095238095 [2020-01-16 23:37:27,427 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 407 transitions. [2020-01-16 23:37:27,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 407 transitions. [2020-01-16 23:37:27,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-01-16 23:37:27,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 407 transitions. [2020-01-16 23:37:27,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-01-16 23:37:27,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-01-16 23:37:27,432 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-01-16 23:37:27,432 INFO L174 Difference]: Start difference. First operand has 34 places, 19 transitions. Second operand 24 states and 407 transitions. [2020-01-16 23:37:27,433 INFO L199 Difference]: Finished difference. Result has 64 places, 58 transitions [2020-01-16 23:37:27,434 INFO L284 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2020-01-16 23:37:27,434 INFO L115 RemoveUnreachable]: Start removeUnreachable. Operand has 64 places, 58 transitions [2020-01-16 23:37:27,434 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 64 places, 58 transitions [2020-01-16 23:37:27,445 INFO L129 PetriNetUnfolder]: 24/86 cut-off events. [2020-01-16 23:37:27,446 INFO L130 PetriNetUnfolder]: For 85/88 co-relation queries the response was YES. [2020-01-16 23:37:27,447 INFO L76 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 86 events. 24/86 cut-off events. For 85/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 347 event pairs. 2/87 useless extension candidates. Maximal degree in co-relation 169. Up to 14 conditions per place. [2020-01-16 23:37:27,448 INFO L126 RemoveUnreachable]: Finished removeUnreachable. Removed 2 of 64 places, 0 of 58 transitions, 2 of 292 flow. [2020-01-16 23:37:27,449 INFO L478 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions [2020-01-16 23:37:27,449 INFO L479 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-01-16 23:37:27,459 INFO L129 PetriNetUnfolder]: 24/89 cut-off events. [2020-01-16 23:37:27,459 INFO L130 PetriNetUnfolder]: For 119/121 co-relation queries the response was YES. [2020-01-16 23:37:27,465 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.01 11:37:27 BasicIcfg [2020-01-16 23:37:27,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-01-16 23:37:27,469 INFO L168 Benchmark]: Toolchain (without parser) took 3809.00 ms. Allocated memory was 140.5 MB in the beginning and 216.0 MB in the end (delta: 75.5 MB). Free memory was 120.6 MB in the beginning and 93.8 MB in the end (delta: 26.8 MB). Peak memory consumption was 102.3 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:27,470 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-01-16 23:37:27,471 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.47 ms. Allocated memory is still 140.5 MB. Free memory was 120.6 MB in the beginning and 118.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:27,471 INFO L168 Benchmark]: Boogie Preprocessor took 18.82 ms. Allocated memory is still 140.5 MB. Free memory was 118.9 MB in the beginning and 117.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:27,472 INFO L168 Benchmark]: RCFGBuilder took 240.67 ms. Allocated memory is still 140.5 MB. Free memory was 117.6 MB in the beginning and 107.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:27,473 INFO L168 Benchmark]: TraceAbstraction took 3510.81 ms. Allocated memory was 140.5 MB in the beginning and 216.0 MB in the end (delta: 75.5 MB). Free memory was 106.6 MB in the beginning and 93.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 88.3 MB. Max. memory is 7.1 GB. [2020-01-16 23:37:27,477 INFO L335 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 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 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 33.47 ms. Allocated memory is still 140.5 MB. Free memory was 120.6 MB in the beginning and 118.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.82 ms. Allocated memory is still 140.5 MB. Free memory was 118.9 MB in the beginning and 117.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.67 ms. Allocated memory is still 140.5 MB. Free memory was 117.6 MB in the beginning and 107.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3510.81 ms. Allocated memory was 140.5 MB in the beginning and 216.0 MB in the end (delta: 75.5 MB). Free memory was 106.6 MB in the beginning and 93.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 88.3 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: 3.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 94 SDslu, 231 SDs, 0 SdLazy, 428 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=4, 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, 10 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, 4704 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...