/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-VariableLbe.epf -i ../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d9e330d [2020-02-10 23:28:35,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-02-10 23:28:35,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-02-10 23:28:35,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-02-10 23:28:35,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-02-10 23:28:35,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-02-10 23:28:35,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-02-10 23:28:35,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-02-10 23:28:35,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-02-10 23:28:35,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-02-10 23:28:35,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-02-10 23:28:35,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-02-10 23:28:35,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-02-10 23:28:35,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-02-10 23:28:35,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-02-10 23:28:35,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-02-10 23:28:35,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-02-10 23:28:35,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-02-10 23:28:35,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-02-10 23:28:35,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-02-10 23:28:35,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-02-10 23:28:35,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-02-10 23:28:35,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-02-10 23:28:35,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-02-10 23:28:35,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-02-10 23:28:35,444 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-VariableLbe.epf [2020-02-10 23:28:35,478 INFO L113 SettingsManager]: Loading preferences was successful [2020-02-10 23:28:35,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-02-10 23:28:35,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-02-10 23:28:35,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-02-10 23:28:35,482 INFO L138 SettingsManager]: * Use SBE=true [2020-02-10 23:28:35,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-02-10 23:28:35,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-02-10 23:28:35,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-02-10 23:28:35,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-02-10 23:28:35,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-02-10 23:28:35,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-02-10 23:28:35,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-02-10 23:28:35,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-02-10 23:28:35,484 INFO L138 SettingsManager]: * sizeof long double=12 [2020-02-10 23:28:35,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-02-10 23:28:35,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-02-10 23:28:35,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-02-10 23:28:35,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-02-10 23:28:35,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-02-10 23:28:35,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-02-10 23:28:35,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-02-10 23:28:35,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-02-10 23:28:35,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-02-10 23:28:35,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-02-10 23:28:35,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-02-10 23:28:35,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-02-10 23:28:35,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-02-10 23:28:35,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-02-10 23:28:35,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-02-10 23:28:35,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-02-10 23:28:35,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-02-10 23:28:35,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-02-10 23:28:35,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-02-10 23:28:35,806 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2020-02-10 23:28:35,807 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2020-02-10 23:28:35,808 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl [2020-02-10 23:28:35,808 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_3.bpl' [2020-02-10 23:28:35,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-02-10 23:28:35,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-02-10 23:28:35,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-02-10 23:28:35,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-02-10 23:28:35,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-02-10 23:28:35,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-02-10 23:28:35,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-02-10 23:28:35,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-02-10 23:28:35,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-02-10 23:28:35,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/1) ... [2020-02-10 23:28:35,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-02-10 23:28:35,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-02-10 23:28:35,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-02-10 23:28:35,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-02-10 23:28:35,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (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 [2020-02-10 23:28:35,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2020-02-10 23:28:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2020-02-10 23:28:35,966 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2020-02-10 23:28:35,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2020-02-10 23:28:35,967 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2020-02-10 23:28:35,967 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2020-02-10 23:28:35,967 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2020-02-10 23:28:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2020-02-10 23:28:35,968 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2020-02-10 23:28:35,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2020-02-10 23:28:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-02-10 23:28:35,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-02-10 23:28:35,970 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-02-10 23:28:36,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-02-10 23:28:36,121 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-02-10 23:28:36,125 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 11:28:36 BoogieIcfgContainer [2020-02-10 23:28:36,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-02-10 23:28:36,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-02-10 23:28:36,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-02-10 23:28:36,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-02-10 23:28:36,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 11:28:35" (1/2) ... [2020-02-10 23:28:36,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c161904 and model type example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 11:28:36, skipping insertion in model container [2020-02-10 23:28:36,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 11:28:36" (2/2) ... [2020-02-10 23:28:36,136 INFO L109 eAbstractionObserver]: Analyzing ICFG example_3.bpl [2020-02-10 23:28:36,147 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-02-10 23:28:36,156 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-02-10 23:28:36,157 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-02-10 23:28:36,274 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-02-10 23:28:36,292 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-02-10 23:28:36,293 INFO L376 AbstractCegarLoop]: Hoare is false [2020-02-10 23:28:36,293 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-02-10 23:28:36,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-02-10 23:28:36,293 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-02-10 23:28:36,293 INFO L380 AbstractCegarLoop]: Difference is false [2020-02-10 23:28:36,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-02-10 23:28:36,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-02-10 23:28:36,302 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions [2020-02-10 23:28:36,336 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-02-10 23:28:36,336 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:28:36,341 INFO L76 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 24 events. 5/24 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-02-10 23:28:36,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions [2020-02-10 23:28:36,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 19 transitions [2020-02-10 23:28:36,354 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 19 transitions [2020-02-10 23:28:36,354 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions [2020-02-10 23:28:36,365 INFO L129 PetriNetUnfolder]: 5/22 cut-off events. [2020-02-10 23:28:36,365 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:28:36,366 INFO L76 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 5/22 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-02-10 23:28:36,368 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions [2020-02-10 23:28:36,378 INFO L129 PetriNetUnfolder]: 5/22 cut-off events. [2020-02-10 23:28:36,378 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:28:36,379 INFO L76 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 22 events. 5/22 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 6 conditions per place. [2020-02-10 23:28:36,380 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 84 [2020-02-10 23:28:36,381 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-02-10 23:28:36,448 INFO L206 etLargeBlockEncoding]: Checked pairs total: 27 [2020-02-10 23:28:36,449 INFO L214 etLargeBlockEncoding]: Total number of compositions: 3 [2020-02-10 23:28:36,449 INFO L160 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 99 [2020-02-10 23:28:36,472 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2020-02-10 23:28:36,472 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:28:36,473 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:36,485 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:36,485 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1482935430, now seen corresponding path program 1 times [2020-02-10 23:28:36,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:36,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728389517] [2020-02-10 23:28:36,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:36,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728389517] [2020-02-10 23:28:36,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:36,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 23:28:36,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870388723] [2020-02-10 23:28:36,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-10 23:28:36,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-10 23:28:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-10 23:28:36,718 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2020-02-10 23:28:36,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions. Second operand 3 states. [2020-02-10 23:28:36,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:36,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2020-02-10 23:28:36,723 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:36,755 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-02-10 23:28:36,755 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-02-10 23:28:36,761 INFO L76 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 16 events. 3/16 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs. 1/17 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2020-02-10 23:28:36,763 INFO L145 encePairwiseOnDemand]: 25/27 looper letters, 2 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2020-02-10 23:28:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-10 23:28:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-10 23:28:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2020-02-10 23:28:36,780 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.9012345679012346 [2020-02-10 23:28:36,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2020-02-10 23:28:36,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2020-02-10 23:28:36,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:36,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2020-02-10 23:28:36,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-10 23:28:36,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-10 23:28:36,797 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-10 23:28:36,799 INFO L178 Difference]: Start difference. First operand has 20 places, 16 transitions. Second operand 3 states and 73 transitions. [2020-02-10 23:28:36,800 INFO L206 Difference]: Finished difference. Result has 22 places, 15 transitions [2020-02-10 23:28:36,803 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2020-02-10 23:28:36,805 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 22 places, 15 transitions [2020-02-10 23:28:36,813 INFO L129 PetriNetUnfolder]: 3/16 cut-off events. [2020-02-10 23:28:36,815 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-02-10 23:28:36,816 INFO L76 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 16 events. 3/16 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 17 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2020-02-10 23:28:36,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 15 transitions [2020-02-10 23:28:36,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 15 transitions [2020-02-10 23:28:36,821 INFO L479 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions [2020-02-10 23:28:36,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-10 23:28:36,835 INFO L129 PetriNetUnfolder]: 3/15 cut-off events. [2020-02-10 23:28:36,838 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2020-02-10 23:28:36,838 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:36,838 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:36,839 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1742319870, now seen corresponding path program 1 times [2020-02-10 23:28:36,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:36,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066094824] [2020-02-10 23:28:36,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:36,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066094824] [2020-02-10 23:28:36,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:36,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-02-10 23:28:36,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441869023] [2020-02-10 23:28:36,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-02-10 23:28:36,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-02-10 23:28:36,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-02-10 23:28:36,894 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 27 [2020-02-10 23:28:36,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions. Second operand 3 states. [2020-02-10 23:28:36,895 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:36,895 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 27 [2020-02-10 23:28:36,895 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:36,915 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2020-02-10 23:28:36,915 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-02-10 23:28:36,915 INFO L76 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 10 events. 0/10 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs. 2/12 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2020-02-10 23:28:36,916 INFO L145 encePairwiseOnDemand]: 24/27 looper letters, 1 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2020-02-10 23:28:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-02-10 23:28:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-02-10 23:28:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2020-02-10 23:28:36,922 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.9012345679012346 [2020-02-10 23:28:36,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 73 transitions. [2020-02-10 23:28:36,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 73 transitions. [2020-02-10 23:28:36,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:36,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 73 transitions. [2020-02-10 23:28:36,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-02-10 23:28:36,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-02-10 23:28:36,925 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-02-10 23:28:36,925 INFO L178 Difference]: Start difference. First operand has 22 places, 15 transitions. Second operand 3 states and 73 transitions. [2020-02-10 23:28:36,926 INFO L206 Difference]: Finished difference. Result has 24 places, 10 transitions [2020-02-10 23:28:36,926 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=24, PETRI_TRANSITIONS=10} [2020-02-10 23:28:36,927 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 24 places, 10 transitions [2020-02-10 23:28:36,931 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2020-02-10 23:28:36,932 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-02-10 23:28:36,932 INFO L76 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 10 events. 0/10 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 5 event pairs. 0/10 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2020-02-10 23:28:36,932 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 10 transitions [2020-02-10 23:28:36,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 10 transitions [2020-02-10 23:28:36,933 INFO L479 AbstractCegarLoop]: Abstraction has has 24 places, 10 transitions [2020-02-10 23:28:36,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-02-10 23:28:36,937 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2020-02-10 23:28:36,937 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-02-10 23:28:36,938 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:36,938 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:36,938 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash 33659132, now seen corresponding path program 1 times [2020-02-10 23:28:36,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:36,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009676554] [2020-02-10 23:28:36,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:37,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009676554] [2020-02-10 23:28:37,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:37,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:28:37,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148432328] [2020-02-10 23:28:37,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:28:37,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:37,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:28:37,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:28:37,094 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:28:37,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 10 transitions. Second operand 5 states. [2020-02-10 23:28:37,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:37,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:28:37,095 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:37,183 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2020-02-10 23:28:37,183 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2020-02-10 23:28:37,184 INFO L76 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 28 events. 3/28 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 59 event pairs. 1/26 useless extension candidates. Maximal degree in co-relation 54. Up to 7 conditions per place. [2020-02-10 23:28:37,185 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 2 changer transitions 1/14 dead transitions. [2020-02-10 23:28:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:28:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:28:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:28:37,187 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:28:37,188 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:37,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:28:37,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:28:37,191 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:28:37,191 INFO L178 Difference]: Start difference. First operand has 24 places, 10 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:28:37,191 INFO L206 Difference]: Finished difference. Result has 31 places, 11 transitions [2020-02-10 23:28:37,192 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=11} [2020-02-10 23:28:37,192 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 31 places, 11 transitions [2020-02-10 23:28:37,200 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-02-10 23:28:37,200 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-02-10 23:28:37,201 INFO L76 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 18 events. 0/18 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs. 0/16 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2020-02-10 23:28:37,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 11 transitions [2020-02-10 23:28:37,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 11 transitions [2020-02-10 23:28:37,202 INFO L479 AbstractCegarLoop]: Abstraction has has 30 places, 11 transitions [2020-02-10 23:28:37,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:28:37,219 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2020-02-10 23:28:37,219 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-02-10 23:28:37,219 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:37,220 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:37,220 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash -812759278, now seen corresponding path program 2 times [2020-02-10 23:28:37,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:37,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018496185] [2020-02-10 23:28:37,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:37,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018496185] [2020-02-10 23:28:37,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:37,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:28:37,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413275104] [2020-02-10 23:28:37,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:28:37,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:28:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:28:37,372 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:28:37,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 11 transitions. Second operand 5 states. [2020-02-10 23:28:37,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:37,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:28:37,373 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:37,417 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2020-02-10 23:28:37,417 INFO L130 PetriNetUnfolder]: For 37/40 co-relation queries the response was YES. [2020-02-10 23:28:37,418 INFO L76 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 29 events. 2/29 cut-off events. For 37/40 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 80 event pairs. 1/28 useless extension candidates. Maximal degree in co-relation 74. Up to 7 conditions per place. [2020-02-10 23:28:37,419 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 3 changer transitions 2/16 dead transitions. [2020-02-10 23:28:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:28:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:28:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:28:37,421 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:28:37,421 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:37,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:28:37,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:28:37,424 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:28:37,425 INFO L178 Difference]: Start difference. First operand has 30 places, 11 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:28:37,425 INFO L206 Difference]: Finished difference. Result has 37 places, 12 transitions [2020-02-10 23:28:37,425 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=12} [2020-02-10 23:28:37,426 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 37 places, 12 transitions [2020-02-10 23:28:37,433 INFO L129 PetriNetUnfolder]: 0/20 cut-off events. [2020-02-10 23:28:37,433 INFO L130 PetriNetUnfolder]: For 32/33 co-relation queries the response was YES. [2020-02-10 23:28:37,434 INFO L76 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 20 events. 0/20 cut-off events. For 32/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs. 0/19 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2020-02-10 23:28:37,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 12 transitions [2020-02-10 23:28:37,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 12 transitions [2020-02-10 23:28:37,439 INFO L479 AbstractCegarLoop]: Abstraction has has 36 places, 12 transitions [2020-02-10 23:28:37,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:28:37,446 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-02-10 23:28:37,446 INFO L130 PetriNetUnfolder]: For 32/33 co-relation queries the response was YES. [2020-02-10 23:28:37,446 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:37,447 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:37,447 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:37,447 INFO L82 PathProgramCache]: Analyzing trace with hash 71195792, now seen corresponding path program 3 times [2020-02-10 23:28:37,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:37,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422914196] [2020-02-10 23:28:37,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:37,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422914196] [2020-02-10 23:28:37,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:37,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:28:37,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491905750] [2020-02-10 23:28:37,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:28:37,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:28:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:28:37,574 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:28:37,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 12 transitions. Second operand 5 states. [2020-02-10 23:28:37,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:37,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:28:37,574 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:37,639 INFO L129 PetriNetUnfolder]: 0/31 cut-off events. [2020-02-10 23:28:37,639 INFO L130 PetriNetUnfolder]: For 87/92 co-relation queries the response was YES. [2020-02-10 23:28:37,640 INFO L76 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 31 events. 0/31 cut-off events. For 87/92 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs. 1/29 useless extension candidates. Maximal degree in co-relation 95. Up to 7 conditions per place. [2020-02-10 23:28:37,641 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 6 selfloop transitions, 2 changer transitions 1/15 dead transitions. [2020-02-10 23:28:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:28:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:28:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:28:37,643 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:28:37,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:37,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:28:37,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:28:37,646 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:28:37,646 INFO L178 Difference]: Start difference. First operand has 36 places, 12 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:28:37,647 INFO L206 Difference]: Finished difference. Result has 43 places, 13 transitions [2020-02-10 23:28:37,647 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=43, PETRI_TRANSITIONS=13} [2020-02-10 23:28:37,647 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 43 places, 13 transitions [2020-02-10 23:28:37,654 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2020-02-10 23:28:37,654 INFO L130 PetriNetUnfolder]: For 97/98 co-relation queries the response was YES. [2020-02-10 23:28:37,655 INFO L76 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 27 events. 0/27 cut-off events. For 97/98 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs. 0/25 useless extension candidates. Maximal degree in co-relation 83. Up to 5 conditions per place. [2020-02-10 23:28:37,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 13 transitions [2020-02-10 23:28:37,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 13 transitions [2020-02-10 23:28:37,656 INFO L479 AbstractCegarLoop]: Abstraction has has 42 places, 13 transitions [2020-02-10 23:28:37,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:28:37,662 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2020-02-10 23:28:37,662 INFO L130 PetriNetUnfolder]: For 97/98 co-relation queries the response was YES. [2020-02-10 23:28:37,662 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:37,663 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:37,663 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 902364692, now seen corresponding path program 4 times [2020-02-10 23:28:37,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:37,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666460739] [2020-02-10 23:28:37,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:37,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666460739] [2020-02-10 23:28:37,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:37,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:28:37,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194814972] [2020-02-10 23:28:37,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:28:37,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:28:37,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:28:37,768 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:28:37,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 13 transitions. Second operand 5 states. [2020-02-10 23:28:37,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:37,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:28:37,769 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:37,836 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2020-02-10 23:28:37,836 INFO L130 PetriNetUnfolder]: For 137/145 co-relation queries the response was YES. [2020-02-10 23:28:37,840 INFO L76 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 26 events. 0/26 cut-off events. For 137/145 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 69 event pairs. 1/26 useless extension candidates. Maximal degree in co-relation 92. Up to 5 conditions per place. [2020-02-10 23:28:37,842 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 5 selfloop transitions, 5 changer transitions 1/17 dead transitions. [2020-02-10 23:28:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:28:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:28:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2020-02-10 23:28:37,846 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2020-02-10 23:28:37,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:37,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 104 transitions. [2020-02-10 23:28:37,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:28:37,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:28:37,852 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:28:37,852 INFO L178 Difference]: Start difference. First operand has 42 places, 13 transitions. Second operand 5 states and 104 transitions. [2020-02-10 23:28:37,853 INFO L206 Difference]: Finished difference. Result has 48 places, 14 transitions [2020-02-10 23:28:37,853 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=14} [2020-02-10 23:28:37,854 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 48 places, 14 transitions [2020-02-10 23:28:37,865 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2020-02-10 23:28:37,865 INFO L130 PetriNetUnfolder]: For 144/148 co-relation queries the response was YES. [2020-02-10 23:28:37,866 INFO L76 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 25 events. 0/25 cut-off events. For 144/148 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 65 event pairs. 0/24 useless extension candidates. Maximal degree in co-relation 86. Up to 5 conditions per place. [2020-02-10 23:28:37,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 14 transitions [2020-02-10 23:28:37,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 14 transitions [2020-02-10 23:28:37,868 INFO L479 AbstractCegarLoop]: Abstraction has has 48 places, 14 transitions [2020-02-10 23:28:37,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:28:37,874 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2020-02-10 23:28:37,875 INFO L130 PetriNetUnfolder]: For 144/148 co-relation queries the response was YES. [2020-02-10 23:28:37,875 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:37,875 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:37,876 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:37,876 INFO L82 PathProgramCache]: Analyzing trace with hash -832277188, now seen corresponding path program 5 times [2020-02-10 23:28:37,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:37,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183062245] [2020-02-10 23:28:37,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:38,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183062245] [2020-02-10 23:28:38,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:38,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:28:38,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076661487] [2020-02-10 23:28:38,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:28:38,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:28:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:28:38,026 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:28:38,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 14 transitions. Second operand 5 states. [2020-02-10 23:28:38,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:38,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:28:38,027 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:38,060 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2020-02-10 23:28:38,060 INFO L130 PetriNetUnfolder]: For 202/217 co-relation queries the response was YES. [2020-02-10 23:28:38,061 INFO L76 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 24 events. 0/24 cut-off events. For 202/217 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 61 event pairs. 2/25 useless extension candidates. Maximal degree in co-relation 93. Up to 5 conditions per place. [2020-02-10 23:28:38,062 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 4 selfloop transitions, 3 changer transitions 3/16 dead transitions. [2020-02-10 23:28:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:28:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:28:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2020-02-10 23:28:38,063 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2020-02-10 23:28:38,063 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2020-02-10 23:28:38,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2020-02-10 23:28:38,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:38,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2020-02-10 23:28:38,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:28:38,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:28:38,065 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:28:38,066 INFO L178 Difference]: Start difference. First operand has 48 places, 14 transitions. Second operand 5 states and 103 transitions. [2020-02-10 23:28:38,066 INFO L206 Difference]: Finished difference. Result has 54 places, 13 transitions [2020-02-10 23:28:38,066 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=13} [2020-02-10 23:28:38,067 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 54 places, 13 transitions [2020-02-10 23:28:38,071 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2020-02-10 23:28:38,071 INFO L130 PetriNetUnfolder]: For 128/129 co-relation queries the response was YES. [2020-02-10 23:28:38,072 INFO L76 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 18 events. 0/18 cut-off events. For 128/129 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs. 0/18 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2020-02-10 23:28:38,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 13 transitions [2020-02-10 23:28:38,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 13 transitions [2020-02-10 23:28:38,073 INFO L479 AbstractCegarLoop]: Abstraction has has 52 places, 13 transitions [2020-02-10 23:28:38,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:28:38,077 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-02-10 23:28:38,078 INFO L130 PetriNetUnfolder]: For 146/151 co-relation queries the response was YES. [2020-02-10 23:28:38,078 INFO L219 CegarLoopForPetriNet]: Found error trace [2020-02-10 23:28:38,078 INFO L227 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-02-10 23:28:38,080 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-02-10 23:28:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-02-10 23:28:38,080 INFO L82 PathProgramCache]: Analyzing trace with hash 644826302, now seen corresponding path program 6 times [2020-02-10 23:28:38,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-02-10 23:28:38,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568260644] [2020-02-10 23:28:38,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-02-10 23:28:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-02-10 23:28:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-02-10 23:28:38,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568260644] [2020-02-10 23:28:38,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-02-10 23:28:38,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-02-10 23:28:38,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927849629] [2020-02-10 23:28:38,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-02-10 23:28:38,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-02-10 23:28:38,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-02-10 23:28:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-02-10 23:28:38,163 INFO L413 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 27 [2020-02-10 23:28:38,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 13 transitions. Second operand 5 states. [2020-02-10 23:28:38,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-02-10 23:28:38,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 27 [2020-02-10 23:28:38,163 INFO L68 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-02-10 23:28:38,191 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-02-10 23:28:38,191 INFO L130 PetriNetUnfolder]: For 199/214 co-relation queries the response was YES. [2020-02-10 23:28:38,192 INFO L76 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 17 events. 0/17 cut-off events. For 199/214 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs. 4/21 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2020-02-10 23:28:38,192 INFO L145 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2020-02-10 23:28:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-02-10 23:28:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-02-10 23:28:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2020-02-10 23:28:38,194 INFO L464 CegarLoopForPetriNet]: DFA transition density 0.7481481481481481 [2020-02-10 23:28:38,194 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 101 transitions. [2020-02-10 23:28:38,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 101 transitions. [2020-02-10 23:28:38,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-02-10 23:28:38,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 101 transitions. [2020-02-10 23:28:38,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-02-10 23:28:38,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-02-10 23:28:38,196 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-02-10 23:28:38,196 INFO L178 Difference]: Start difference. First operand has 52 places, 13 transitions. Second operand 5 states and 101 transitions. [2020-02-10 23:28:38,196 INFO L206 Difference]: Finished difference. Result has 56 places, 0 transitions [2020-02-10 23:28:38,196 INFO L292 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2020-02-10 23:28:38,197 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 56 places, 0 transitions [2020-02-10 23:28:38,197 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-10 23:28:38,197 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-10 23:28:38,197 INFO L76 FinitePrefix]: Finished finitePrefix Result has 25 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. [2020-02-10 23:28:38,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 0 transitions [2020-02-10 23:28:38,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 0 places, 0 transitions [2020-02-10 23:28:38,198 INFO L479 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions [2020-02-10 23:28:38,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-02-10 23:28:38,198 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2020-02-10 23:28:38,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-02-10 23:28:38,203 INFO L202 PluginConnector]: Adding new model example_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 11:28:38 BasicIcfg [2020-02-10 23:28:38,203 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-02-10 23:28:38,206 INFO L168 Benchmark]: Toolchain (without parser) took 2364.52 ms. Allocated memory was 140.5 MB in the beginning and 196.1 MB in the end (delta: 55.6 MB). Free memory was 122.4 MB in the beginning and 139.4 MB in the end (delta: -17.0 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-02-10 23:28:38,208 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.7 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-02-10 23:28:38,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.64 ms. Allocated memory is still 140.5 MB. Free memory was 122.2 MB in the beginning and 120.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-02-10 23:28:38,209 INFO L168 Benchmark]: Boogie Preprocessor took 18.65 ms. Allocated memory is still 140.5 MB. Free memory was 120.5 MB in the beginning and 119.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-02-10 23:28:38,210 INFO L168 Benchmark]: RCFGBuilder took 226.82 ms. Allocated memory is still 140.5 MB. Free memory was 119.4 MB in the beginning and 109.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-02-10 23:28:38,211 INFO L168 Benchmark]: TraceAbstraction took 2077.07 ms. Allocated memory was 140.5 MB in the beginning and 196.1 MB in the end (delta: 55.6 MB). Free memory was 108.7 MB in the beginning and 139.4 MB in the end (delta: -30.7 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-02-10 23:28:38,215 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 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 123.7 MB in the beginning and 123.4 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 35.64 ms. Allocated memory is still 140.5 MB. Free memory was 122.2 MB in the beginning and 120.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.65 ms. Allocated memory is still 140.5 MB. Free memory was 120.5 MB in the beginning and 119.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.82 ms. Allocated memory is still 140.5 MB. Free memory was 119.4 MB in the beginning and 109.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2077.07 ms. Allocated memory was 140.5 MB in the beginning and 196.1 MB in the end (delta: 55.6 MB). Free memory was 108.7 MB in the beginning and 139.4 MB in the end (delta: -30.7 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.0s, 23 ProgramPointsBefore, 20 ProgramPointsAfterwards, 19 TransitionsBefore, 16 TransitionsAfterwards, 84 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 24 VarBasedMoverChecksPositive, 0 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 27 CheckedPairsTotal, 3 TotalNumberOfCompositions - PositiveResult [Line: 19]: 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 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. Result: SAFE, OverallTime: 1.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 37 SDtfs, 32 SDslu, 18 SDs, 0 SdLazy, 59 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 8 MinimizatonAttempts, 61 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 4590 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...