java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:05:12,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:05:12,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:05:12,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:05:12,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:05:12,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:05:12,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:05:12,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:05:12,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:05:12,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:05:12,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:05:12,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:05:12,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:05:12,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:05:12,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:05:12,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:05:12,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:05:12,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:05:12,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:05:12,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:05:12,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:05:12,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:05:12,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:05:12,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:05:12,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:05:12,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:05:12,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:05:12,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:05:12,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:05:12,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:05:12,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:05:12,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:05:12,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:05:12,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:05:12,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:05:12,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:05:12,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:05:12,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:05:12,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:05:12,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:05:12,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:05:12,182 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:05:12,208 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:05:12,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:05:12,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:05:12,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:05:12,211 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:05:12,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:05:12,212 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:05:12,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:05:12,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:05:12,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:05:12,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:05:12,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:05:12,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:05:12,214 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:05:12,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:05:12,214 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:05:12,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:05:12,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:05:12,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:05:12,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:05:12,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:05:12,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:05:12,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:05:12,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:05:12,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:05:12,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:05:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:05:12,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:05:12,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:05:12,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:05:12,546 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:05:12,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:05:12,551 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:05:12,552 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:05:12,552 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product29.cil.c [2019-10-13 23:05:12,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4066945bd/362480695eda45b99b070c38c335b55b/FLAGd3150787b [2019-10-13 23:05:13,255 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:05:13,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product29.cil.c [2019-10-13 23:05:13,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4066945bd/362480695eda45b99b070c38c335b55b/FLAGd3150787b [2019-10-13 23:05:13,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4066945bd/362480695eda45b99b070c38c335b55b [2019-10-13 23:05:13,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:05:13,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:05:13,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:05:13,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:05:13,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:05:13,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:05:13" (1/1) ... [2019-10-13 23:05:13,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d01eef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:13, skipping insertion in model container [2019-10-13 23:05:13,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:05:13" (1/1) ... [2019-10-13 23:05:13,612 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:05:13,686 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:05:14,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:05:14,365 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:05:14,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:05:14,545 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:05:14,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14 WrapperNode [2019-10-13 23:05:14,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:05:14,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:05:14,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:05:14,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:05:14,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (1/1) ... [2019-10-13 23:05:14,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:05:14,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:05:14,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:05:14,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:05:14,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (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 [2019-10-13 23:05:14,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:05:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:05:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:05:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:05:14,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:05:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:05:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:05:14,831 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:05:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:05:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:05:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:05:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:05:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:05:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:05:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:05:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:05:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:05:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:05:14,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:05:14,838 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:05:14,839 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:05:14,839 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:05:14,839 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:05:14,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:05:14,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:05:14,840 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:05:14,840 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:05:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:05:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:05:14,841 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:05:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:05:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:05:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:05:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:05:14,842 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:05:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:05:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:05:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:05:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:05:14,843 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:05:14,844 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:05:14,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:05:14,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:05:14,844 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:05:14,844 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:05:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:05:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:05:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:05:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:05:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:05:14,845 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:05:14,846 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:05:14,846 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:05:14,846 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:05:14,846 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:05:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:05:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:05:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:05:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:05:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:05:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:05:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:05:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:05:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:05:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:05:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:05:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:05:14,849 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:05:14,850 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:05:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:05:14,851 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:05:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:05:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:05:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:05:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:05:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:05:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:05:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:05:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:05:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:05:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:05:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:05:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:05:14,855 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:05:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:05:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:05:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:05:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:05:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:05:14,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:05:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:05:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:05:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:05:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:05:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:05:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:05:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:05:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:05:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:05:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:05:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:05:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:05:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:05:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:05:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:05:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:05:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:05:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:05:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:05:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:05:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:05:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:05:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:05:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:05:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:05:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:05:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:05:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:05:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:05:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:05:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:05:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:05:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:05:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:05:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:05:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:05:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:05:14,865 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:05:14,865 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:05:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:05:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:05:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:05:14,870 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:05:14,871 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:05:14,871 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:05:14,872 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:05:14,872 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:05:14,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:05:14,872 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:05:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:05:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:05:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:05:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:05:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:05:14,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:05:14,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:05:14,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:05:14,880 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:05:14,880 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:05:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:05:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:05:14,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:05:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:05:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:05:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:05:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:05:14,882 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:05:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:05:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:05:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:05:14,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:05:19,599 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:05:19,600 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:05:19,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:05:19 BoogieIcfgContainer [2019-10-13 23:05:19,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:05:19,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:05:19,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:05:19,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:05:19,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:05:13" (1/3) ... [2019-10-13 23:05:19,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f974b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:05:19, skipping insertion in model container [2019-10-13 23:05:19,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:14" (2/3) ... [2019-10-13 23:05:19,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f974b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:05:19, skipping insertion in model container [2019-10-13 23:05:19,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:05:19" (3/3) ... [2019-10-13 23:05:19,609 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product29.cil.c [2019-10-13 23:05:19,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:05:19,627 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:05:19,638 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:05:19,672 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:05:19,672 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:05:19,672 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:05:19,672 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:05:19,672 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:05:19,673 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:05:19,673 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:05:19,673 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:05:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states. [2019-10-13 23:05:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 23:05:19,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:19,741 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:19,743 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1689807222, now seen corresponding path program 1 times [2019-10-13 23:05:19,758 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:19,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793792924] [2019-10-13 23:05:19,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:19,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:19,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:20,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793792924] [2019-10-13 23:05:20,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286966712] [2019-10-13 23:05:20,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:21,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 3001 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:21,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:21,317 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:21,515 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:21,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 23:05:21,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54173371] [2019-10-13 23:05:21,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:21,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:05:21,539 INFO L87 Difference]: Start difference. First operand 598 states. Second operand 3 states. [2019-10-13 23:05:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:21,766 INFO L93 Difference]: Finished difference Result 1316 states and 2001 transitions. [2019-10-13 23:05:21,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:21,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-13 23:05:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:21,814 INFO L225 Difference]: With dead ends: 1316 [2019-10-13 23:05:21,814 INFO L226 Difference]: Without dead ends: 850 [2019-10-13 23:05:21,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:05:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2019-10-13 23:05:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 837. [2019-10-13 23:05:21,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2019-10-13 23:05:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1256 transitions. [2019-10-13 23:05:21,978 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1256 transitions. Word has length 112 [2019-10-13 23:05:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:21,979 INFO L462 AbstractCegarLoop]: Abstraction has 837 states and 1256 transitions. [2019-10-13 23:05:21,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1256 transitions. [2019-10-13 23:05:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 23:05:21,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:21,990 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:22,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:22,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash 343984818, now seen corresponding path program 1 times [2019-10-13 23:05:22,201 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:22,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475933439] [2019-10-13 23:05:22,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:22,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:22,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:22,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475933439] [2019-10-13 23:05:22,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134190090] [2019-10-13 23:05:22,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:23,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:05:23,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:23,204 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:23,345 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:23,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-13 23:05:23,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769033293] [2019-10-13 23:05:23,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:05:23,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:05:23,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:23,348 INFO L87 Difference]: Start difference. First operand 837 states and 1256 transitions. Second operand 5 states. [2019-10-13 23:05:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:25,166 INFO L93 Difference]: Finished difference Result 3196 states and 4897 transitions. [2019-10-13 23:05:25,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:05:25,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-10-13 23:05:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:25,197 INFO L225 Difference]: With dead ends: 3196 [2019-10-13 23:05:25,197 INFO L226 Difference]: Without dead ends: 2390 [2019-10-13 23:05:25,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2019-10-13 23:05:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2340. [2019-10-13 23:05:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2340 states. [2019-10-13 23:05:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 3483 transitions. [2019-10-13 23:05:25,405 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 3483 transitions. Word has length 113 [2019-10-13 23:05:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:25,408 INFO L462 AbstractCegarLoop]: Abstraction has 2340 states and 3483 transitions. [2019-10-13 23:05:25,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:05:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 3483 transitions. [2019-10-13 23:05:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 23:05:25,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:25,416 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:25,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:25,624 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:25,625 INFO L82 PathProgramCache]: Analyzing trace with hash -483217119, now seen corresponding path program 1 times [2019-10-13 23:05:25,625 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:25,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112327450] [2019-10-13 23:05:25,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:25,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:25,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:25,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112327450] [2019-10-13 23:05:25,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668079713] [2019-10-13 23:05:25,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:26,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 23:05:26,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:26,511 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:26,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 23:05:26,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:26,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 23:05:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:26,950 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:26,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7] total 16 [2019-10-13 23:05:26,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479175834] [2019-10-13 23:05:26,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:05:26,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:26,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:05:26,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-13 23:05:26,953 INFO L87 Difference]: Start difference. First operand 2340 states and 3483 transitions. Second operand 11 states. [2019-10-13 23:05:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:28,573 INFO L93 Difference]: Finished difference Result 4405 states and 6612 transitions. [2019-10-13 23:05:28,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:05:28,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2019-10-13 23:05:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:28,600 INFO L225 Difference]: With dead ends: 4405 [2019-10-13 23:05:28,600 INFO L226 Difference]: Without dead ends: 2652 [2019-10-13 23:05:28,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:05:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2019-10-13 23:05:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2524. [2019-10-13 23:05:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2524 states. [2019-10-13 23:05:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 3735 transitions. [2019-10-13 23:05:28,838 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 3735 transitions. Word has length 118 [2019-10-13 23:05:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:28,839 INFO L462 AbstractCegarLoop]: Abstraction has 2524 states and 3735 transitions. [2019-10-13 23:05:28,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 23:05:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 3735 transitions. [2019-10-13 23:05:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 23:05:28,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:28,846 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:29,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:29,056 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1170444739, now seen corresponding path program 1 times [2019-10-13 23:05:29,057 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:29,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200630206] [2019-10-13 23:05:29,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:29,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:29,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:29,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200630206] [2019-10-13 23:05:29,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273488961] [2019-10-13 23:05:29,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:29,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 3018 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:05:29,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:29,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:30,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:30,165 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:30,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 13 [2019-10-13 23:05:30,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795805793] [2019-10-13 23:05:30,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:05:30,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:05:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:30,167 INFO L87 Difference]: Start difference. First operand 2524 states and 3735 transitions. Second operand 8 states. [2019-10-13 23:05:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:30,486 INFO L93 Difference]: Finished difference Result 4981 states and 7473 transitions. [2019-10-13 23:05:30,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:05:30,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-13 23:05:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:30,518 INFO L225 Difference]: With dead ends: 4981 [2019-10-13 23:05:30,518 INFO L226 Difference]: Without dead ends: 3012 [2019-10-13 23:05:30,533 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 229 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:05:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2019-10-13 23:05:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 3012. [2019-10-13 23:05:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3012 states. [2019-10-13 23:05:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4479 transitions. [2019-10-13 23:05:30,771 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4479 transitions. Word has length 118 [2019-10-13 23:05:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:30,772 INFO L462 AbstractCegarLoop]: Abstraction has 3012 states and 4479 transitions. [2019-10-13 23:05:30,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:05:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4479 transitions. [2019-10-13 23:05:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 23:05:30,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:30,782 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:30,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:30,993 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1768528239, now seen corresponding path program 1 times [2019-10-13 23:05:30,994 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:30,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763376470] [2019-10-13 23:05:30,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:30,995 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:30,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:31,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763376470] [2019-10-13 23:05:31,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909667705] [2019-10-13 23:05:31,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:31,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 3018 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:05:31,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:31,889 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:31,978 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:31,979 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 7 [2019-10-13 23:05:31,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706039401] [2019-10-13 23:05:31,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:05:31,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:05:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:05:31,981 INFO L87 Difference]: Start difference. First operand 3012 states and 4479 transitions. Second operand 4 states. [2019-10-13 23:05:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:33,326 INFO L93 Difference]: Finished difference Result 11549 states and 17701 transitions. [2019-10-13 23:05:33,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:05:33,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-13 23:05:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:33,419 INFO L225 Difference]: With dead ends: 11549 [2019-10-13 23:05:33,419 INFO L226 Difference]: Without dead ends: 8609 [2019-10-13 23:05:33,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:05:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8609 states. [2019-10-13 23:05:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8609 to 8470. [2019-10-13 23:05:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8470 states. [2019-10-13 23:05:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8470 states to 8470 states and 12850 transitions. [2019-10-13 23:05:33,890 INFO L78 Accepts]: Start accepts. Automaton has 8470 states and 12850 transitions. Word has length 119 [2019-10-13 23:05:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:33,892 INFO L462 AbstractCegarLoop]: Abstraction has 8470 states and 12850 transitions. [2019-10-13 23:05:33,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:05:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8470 states and 12850 transitions. [2019-10-13 23:05:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 23:05:33,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:33,897 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:34,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:34,104 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:34,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1185474952, now seen corresponding path program 1 times [2019-10-13 23:05:34,105 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:34,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309590980] [2019-10-13 23:05:34,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:34,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:34,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:34,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309590980] [2019-10-13 23:05:34,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953154833] [2019-10-13 23:05:34,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:34,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 23:05:34,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:34,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:35,127 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-13 23:05:35,229 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-13 23:05:35,535 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-13 23:05:36,061 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-13 23:05:36,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:36,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:36,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:36,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:36,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:36,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:05:36,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2019-10-13 23:05:36,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760383277] [2019-10-13 23:05:36,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:05:36,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:05:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:36,173 INFO L87 Difference]: Start difference. First operand 8470 states and 12850 transitions. Second operand 6 states. [2019-10-13 23:05:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:37,797 INFO L93 Difference]: Finished difference Result 17048 states and 25944 transitions. [2019-10-13 23:05:37,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:05:37,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-10-13 23:05:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:37,873 INFO L225 Difference]: With dead ends: 17048 [2019-10-13 23:05:37,874 INFO L226 Difference]: Without dead ends: 8609 [2019-10-13 23:05:37,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8609 states. [2019-10-13 23:05:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8609 to 8470. [2019-10-13 23:05:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8470 states. [2019-10-13 23:05:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8470 states to 8470 states and 12847 transitions. [2019-10-13 23:05:39,300 INFO L78 Accepts]: Start accepts. Automaton has 8470 states and 12847 transitions. Word has length 121 [2019-10-13 23:05:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:39,301 INFO L462 AbstractCegarLoop]: Abstraction has 8470 states and 12847 transitions. [2019-10-13 23:05:39,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:05:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8470 states and 12847 transitions. [2019-10-13 23:05:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 23:05:39,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:39,310 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:39,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:39,519 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1854972425, now seen corresponding path program 1 times [2019-10-13 23:05:39,520 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:39,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086426617] [2019-10-13 23:05:39,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:39,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:39,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:39,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086426617] [2019-10-13 23:05:39,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853448967] [2019-10-13 23:05:39,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:40,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 3030 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:40,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:40,494 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:40,628 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:40,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-13 23:05:40,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927080886] [2019-10-13 23:05:40,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:05:40,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:05:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:40,631 INFO L87 Difference]: Start difference. First operand 8470 states and 12847 transitions. Second operand 4 states. [2019-10-13 23:05:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:40,968 INFO L93 Difference]: Finished difference Result 17179 states and 26331 transitions. [2019-10-13 23:05:40,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:05:40,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 23:05:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:41,034 INFO L225 Difference]: With dead ends: 17179 [2019-10-13 23:05:41,035 INFO L226 Difference]: Without dead ends: 8740 [2019-10-13 23:05:41,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8740 states. [2019-10-13 23:05:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8740 to 8569. [2019-10-13 23:05:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8569 states. [2019-10-13 23:05:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8569 states to 8569 states and 12964 transitions. [2019-10-13 23:05:41,452 INFO L78 Accepts]: Start accepts. Automaton has 8569 states and 12964 transitions. Word has length 122 [2019-10-13 23:05:41,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:41,453 INFO L462 AbstractCegarLoop]: Abstraction has 8569 states and 12964 transitions. [2019-10-13 23:05:41,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:05:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 8569 states and 12964 transitions. [2019-10-13 23:05:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:05:41,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:41,458 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:41,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:41,670 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1522690234, now seen corresponding path program 1 times [2019-10-13 23:05:41,671 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:41,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216618545] [2019-10-13 23:05:41,671 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:41,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:41,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:42,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216618545] [2019-10-13 23:05:42,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147730466] [2019-10-13 23:05:42,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:42,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 3017 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:42,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:42,752 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:42,856 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:42,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 23:05:42,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914191814] [2019-10-13 23:05:42,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:42,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:05:42,860 INFO L87 Difference]: Start difference. First operand 8569 states and 12964 transitions. Second operand 3 states. [2019-10-13 23:05:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:43,261 INFO L93 Difference]: Finished difference Result 21211 states and 32538 transitions. [2019-10-13 23:05:43,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:43,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-13 23:05:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:43,341 INFO L225 Difference]: With dead ends: 21211 [2019-10-13 23:05:43,342 INFO L226 Difference]: Without dead ends: 12673 [2019-10-13 23:05:43,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:05:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12673 states. [2019-10-13 23:05:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12673 to 12448. [2019-10-13 23:05:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12448 states.