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_spec9_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:10:00,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:10:00,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:10:00,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:10:00,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:10:00,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:10:00,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:10:00,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:10:00,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:10:00,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:10:00,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:10:00,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:10:00,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:10:00,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:10:00,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:10:00,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:10:00,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:10:00,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:10:00,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:10:00,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:10:00,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:10:00,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:10:00,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:10:00,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:10:00,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:10:00,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:10:00,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:10:00,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:10:00,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:10:00,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:10:00,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:10:00,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:10:00,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:10:00,803 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:10:00,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:10:00,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:10:00,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:10:00,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:10:00,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:10:00,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:10:00,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:10:00,808 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 [2019-10-15 03:10:00,823 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:10:00,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:10:00,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:10:00,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:10:00,826 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:10:00,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:10:00,826 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:10:00,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:10:00,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:10:00,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:10:00,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:10:00,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:10:00,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:10:00,828 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:10:00,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:10:00,828 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:10:00,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:10:00,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:10:00,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:10:00,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:10:00,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:10:00,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:10:00,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:10:00,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:10:00,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:10:00,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:10:00,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:10:00,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:10:00,831 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 [2019-10-15 03:10:01,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:10:01,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:10:01,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:10:01,232 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:10:01,232 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:10:01,233 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec9_product31.cil.c [2019-10-15 03:10:01,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b2b6f0f/6f1ace64beea4daaa72f31d35a1b27f7/FLAG6f2ab6279 [2019-10-15 03:10:02,143 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:10:02,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec9_product31.cil.c [2019-10-15 03:10:02,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b2b6f0f/6f1ace64beea4daaa72f31d35a1b27f7/FLAG6f2ab6279 [2019-10-15 03:10:02,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b2b6f0f/6f1ace64beea4daaa72f31d35a1b27f7 [2019-10-15 03:10:02,272 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:10:02,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:10:02,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:10:02,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:10:02,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:10:02,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:10:02" (1/1) ... [2019-10-15 03:10:02,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1763af5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:02, skipping insertion in model container [2019-10-15 03:10:02,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:10:02" (1/1) ... [2019-10-15 03:10:02,294 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:10:02,393 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:10:03,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:10:03,458 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:10:03,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:10:03,724 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:10:03,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03 WrapperNode [2019-10-15 03:10:03,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:10:03,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:10:03,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:10:03,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:10:03,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (1/1) ... [2019-10-15 03:10:03,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:10:03,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:10:03,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:10:03,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:10:03,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (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 [2019-10-15 03:10:04,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:10:04,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:10:04,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:10:04,021 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:10:04,022 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:10:04,023 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:10:04,023 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:10:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:10:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:10:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:10:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:10:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:10:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:10:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:10:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:10:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:10:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:10:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:10:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2019-10-15 03:10:04,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2019-10-15 03:10:04,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2019-10-15 03:10:04,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2019-10-15 03:10:04,031 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:10:04,031 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:10:04,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:10:04,032 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 03:10:04,032 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:10:04,032 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:10:04,033 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 03:10:04,033 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:10:04,033 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:10:04,034 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:10:04,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:10:04,034 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:10:04,035 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:10:04,035 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:10:04,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:10:04,035 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:10:04,036 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:10:04,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:10:04,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 03:10:04,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:10:04,036 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:10:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:10:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:10:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 03:10:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:10:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:10:04,037 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:10:04,038 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:10:04,038 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:10:04,038 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:10:04,038 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 03:10:04,039 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 03:10:04,039 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:10:04,039 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:10:04,039 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:10:04,039 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:10:04,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:10:04,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:10:04,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:10:04,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:10:04,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:10:04,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:10:04,042 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:10:04,042 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:10:04,042 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:10:04,042 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:10:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:10:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:10:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:10:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:10:04,043 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:10:04,045 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:10:04,045 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:10:04,045 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:10:04,046 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:10:04,047 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:10:04,047 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:10:04,047 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:10:04,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:10:04,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:10:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:10:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:10:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:10:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:10:04,050 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:10:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:10:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:10:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:10:04,051 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:10:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:10:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:10:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:10:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:10:04,052 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:10:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:10:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:10:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:10:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:10:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:10:04,053 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:10:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:10:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:10:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:10:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:10:04,054 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:10:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:10:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2019-10-15 03:10:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2019-10-15 03:10:04,055 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2019-10-15 03:10:04,056 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2019-10-15 03:10:04,056 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:10:04,056 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:10:04,057 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:10:04,057 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:10:04,057 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:10:04,057 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 03:10:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 03:10:04,058 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 03:10:04,059 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:10:04,059 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 03:10:04,059 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:10:04,059 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:10:04,060 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:10:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:10:04,061 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:10:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:10:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 03:10:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:10:04,062 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:10:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:10:04,063 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 03:10:04,064 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:10:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:10:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:10:04,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:10:04,070 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:10:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:10:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:10:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:10:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:10:04,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:10:04,072 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:10:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:10:04,075 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:10:04,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:10:04,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:10:04,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:10:04,077 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:10:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:10:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:10:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:10:04,078 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:10:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:10:04,081 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:10:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:10:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:10:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:10:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:10:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:10:04,082 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:10:04,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:10:04,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:10:10,327 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:10:10,328 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:10:10,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:10:10 BoogieIcfgContainer [2019-10-15 03:10:10,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:10:10,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:10:10,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:10:10,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:10:10,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:10:02" (1/3) ... [2019-10-15 03:10:10,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c01c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:10:10, skipping insertion in model container [2019-10-15 03:10:10,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:10:03" (2/3) ... [2019-10-15 03:10:10,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c01c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:10:10, skipping insertion in model container [2019-10-15 03:10:10,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:10:10" (3/3) ... [2019-10-15 03:10:10,339 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2019-10-15 03:10:10,350 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:10:10,363 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:10:10,375 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:10:10,430 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:10:10,430 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:10:10,430 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:10:10,431 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:10:10,432 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:10:10,432 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:10:10,432 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:10:10,432 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:10:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states. [2019-10-15 03:10:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 03:10:10,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:10,519 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:10,527 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1503407421, now seen corresponding path program 1 times [2019-10-15 03:10:10,549 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:10,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605594093] [2019-10-15 03:10:10,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:10,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:10,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:11,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605594093] [2019-10-15 03:10:11,328 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:11,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:10:11,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016972643] [2019-10-15 03:10:11,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:10:11,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:10:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:10:11,359 INFO L87 Difference]: Start difference. First operand 592 states. Second operand 2 states. [2019-10-15 03:10:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:11,572 INFO L93 Difference]: Finished difference Result 495 states and 726 transitions. [2019-10-15 03:10:11,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:10:11,573 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 112 [2019-10-15 03:10:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:11,615 INFO L225 Difference]: With dead ends: 495 [2019-10-15 03:10:11,615 INFO L226 Difference]: Without dead ends: 461 [2019-10-15 03:10:11,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:10:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2019-10-15 03:10:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2019-10-15 03:10:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-10-15 03:10:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 675 transitions. [2019-10-15 03:10:11,749 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 675 transitions. Word has length 112 [2019-10-15 03:10:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:11,752 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 675 transitions. [2019-10-15 03:10:11,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:10:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 675 transitions. [2019-10-15 03:10:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 03:10:11,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:11,764 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:11,764 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1509585309, now seen corresponding path program 1 times [2019-10-15 03:10:11,765 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:11,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374694680] [2019-10-15 03:10:11,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:11,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:11,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:12,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374694680] [2019-10-15 03:10:12,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:12,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:10:12,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061323733] [2019-10-15 03:10:12,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:10:12,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:10:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:10:12,140 INFO L87 Difference]: Start difference. First operand 461 states and 675 transitions. Second operand 7 states. [2019-10-15 03:10:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:17,325 INFO L93 Difference]: Finished difference Result 1310 states and 1962 transitions. [2019-10-15 03:10:17,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 03:10:17,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-15 03:10:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:17,337 INFO L225 Difference]: With dead ends: 1310 [2019-10-15 03:10:17,337 INFO L226 Difference]: Without dead ends: 891 [2019-10-15 03:10:17,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:10:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2019-10-15 03:10:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 866. [2019-10-15 03:10:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-10-15 03:10:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1293 transitions. [2019-10-15 03:10:17,476 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1293 transitions. Word has length 113 [2019-10-15 03:10:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:17,477 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1293 transitions. [2019-10-15 03:10:17,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:10:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1293 transitions. [2019-10-15 03:10:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 03:10:17,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:17,486 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:17,486 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash 210108482, now seen corresponding path program 1 times [2019-10-15 03:10:17,487 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:17,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571649423] [2019-10-15 03:10:17,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:17,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:17,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:17,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571649423] [2019-10-15 03:10:17,768 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:17,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:10:17,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599749612] [2019-10-15 03:10:17,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:10:17,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:10:17,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:17,774 INFO L87 Difference]: Start difference. First operand 866 states and 1293 transitions. Second operand 3 states. [2019-10-15 03:10:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:17,989 INFO L93 Difference]: Finished difference Result 2472 states and 3759 transitions. [2019-10-15 03:10:17,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:10:17,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2019-10-15 03:10:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:18,009 INFO L225 Difference]: With dead ends: 2472 [2019-10-15 03:10:18,009 INFO L226 Difference]: Without dead ends: 1648 [2019-10-15 03:10:18,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2019-10-15 03:10:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1616. [2019-10-15 03:10:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1616 states. [2019-10-15 03:10:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2453 transitions. [2019-10-15 03:10:18,140 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2453 transitions. Word has length 117 [2019-10-15 03:10:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:18,141 INFO L462 AbstractCegarLoop]: Abstraction has 1616 states and 2453 transitions. [2019-10-15 03:10:18,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:10:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2453 transitions. [2019-10-15 03:10:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 03:10:18,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:18,146 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:18,146 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2077884368, now seen corresponding path program 1 times [2019-10-15 03:10:18,147 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:18,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100094596] [2019-10-15 03:10:18,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:18,147 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:18,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:18,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100094596] [2019-10-15 03:10:18,371 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:18,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:10:18,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746341788] [2019-10-15 03:10:18,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:10:18,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:10:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:18,374 INFO L87 Difference]: Start difference. First operand 1616 states and 2453 transitions. Second operand 3 states. [2019-10-15 03:10:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:18,595 INFO L93 Difference]: Finished difference Result 4723 states and 7276 transitions. [2019-10-15 03:10:18,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:10:18,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-15 03:10:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:18,623 INFO L225 Difference]: With dead ends: 4723 [2019-10-15 03:10:18,624 INFO L226 Difference]: Without dead ends: 3150 [2019-10-15 03:10:18,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2019-10-15 03:10:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 3117. [2019-10-15 03:10:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3117 states. [2019-10-15 03:10:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 4795 transitions. [2019-10-15 03:10:18,829 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 4795 transitions. Word has length 118 [2019-10-15 03:10:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:18,830 INFO L462 AbstractCegarLoop]: Abstraction has 3117 states and 4795 transitions. [2019-10-15 03:10:18,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:10:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 4795 transitions. [2019-10-15 03:10:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 03:10:18,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:18,834 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:18,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash 8785220, now seen corresponding path program 1 times [2019-10-15 03:10:18,835 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:18,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786965059] [2019-10-15 03:10:18,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:18,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:18,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:19,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786965059] [2019-10-15 03:10:19,123 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:19,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:10:19,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900424641] [2019-10-15 03:10:19,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:10:19,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:10:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:19,126 INFO L87 Difference]: Start difference. First operand 3117 states and 4795 transitions. Second operand 3 states. [2019-10-15 03:10:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:19,449 INFO L93 Difference]: Finished difference Result 9226 states and 14421 transitions. [2019-10-15 03:10:19,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:10:19,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-15 03:10:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:19,523 INFO L225 Difference]: With dead ends: 9226 [2019-10-15 03:10:19,523 INFO L226 Difference]: Without dead ends: 6154 [2019-10-15 03:10:19,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2019-10-15 03:10:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 6120. [2019-10-15 03:10:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6120 states. [2019-10-15 03:10:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 9555 transitions. [2019-10-15 03:10:20,106 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 9555 transitions. Word has length 119 [2019-10-15 03:10:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:20,109 INFO L462 AbstractCegarLoop]: Abstraction has 6120 states and 9555 transitions. [2019-10-15 03:10:20,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:10:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 9555 transitions. [2019-10-15 03:10:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 03:10:20,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:20,117 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:20,122 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash 271036914, now seen corresponding path program 1 times [2019-10-15 03:10:20,123 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:20,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669448923] [2019-10-15 03:10:20,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:20,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:20,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:20,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669448923] [2019-10-15 03:10:20,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:20,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:10:20,344 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60931168] [2019-10-15 03:10:20,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:10:20,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:20,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:10:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:20,346 INFO L87 Difference]: Start difference. First operand 6120 states and 9555 transitions. Second operand 3 states. [2019-10-15 03:10:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:21,071 INFO L93 Difference]: Finished difference Result 18233 states and 29104 transitions. [2019-10-15 03:10:21,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:10:21,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-15 03:10:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:21,224 INFO L225 Difference]: With dead ends: 18233 [2019-10-15 03:10:21,224 INFO L226 Difference]: Without dead ends: 12162 [2019-10-15 03:10:21,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12162 states. [2019-10-15 03:10:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12162 to 12127. [2019-10-15 03:10:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12127 states. [2019-10-15 03:10:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12127 states to 12127 states and 19351 transitions. [2019-10-15 03:10:22,163 INFO L78 Accepts]: Start accepts. Automaton has 12127 states and 19351 transitions. Word has length 120 [2019-10-15 03:10:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:22,164 INFO L462 AbstractCegarLoop]: Abstraction has 12127 states and 19351 transitions. [2019-10-15 03:10:22,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:10:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 12127 states and 19351 transitions. [2019-10-15 03:10:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 03:10:22,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:22,170 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-15 03:10:22,170 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -189091258, now seen corresponding path program 1 times [2019-10-15 03:10:22,172 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:22,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920971957] [2019-10-15 03:10:22,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:22,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:22,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:10:23,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920971957] [2019-10-15 03:10:23,104 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:23,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:10:23,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772506418] [2019-10-15 03:10:23,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:10:23,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:23,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:10:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:23,107 INFO L87 Difference]: Start difference. First operand 12127 states and 19351 transitions. Second operand 3 states. [2019-10-15 03:10:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:23,586 INFO L93 Difference]: Finished difference Result 12914 states and 20690 transitions. [2019-10-15 03:10:23,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:10:23,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-15 03:10:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:23,748 INFO L225 Difference]: With dead ends: 12914 [2019-10-15 03:10:23,748 INFO L226 Difference]: Without dead ends: 12901 [2019-10-15 03:10:23,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:10:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12901 states. [2019-10-15 03:10:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12901 to 12871. [2019-10-15 03:10:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12871 states. [2019-10-15 03:10:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12871 states to 12871 states and 20628 transitions. [2019-10-15 03:10:24,750 INFO L78 Accepts]: Start accepts. Automaton has 12871 states and 20628 transitions. Word has length 121 [2019-10-15 03:10:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:24,752 INFO L462 AbstractCegarLoop]: Abstraction has 12871 states and 20628 transitions. [2019-10-15 03:10:24,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:10:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12871 states and 20628 transitions. [2019-10-15 03:10:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 03:10:24,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:24,761 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:10:24,761 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash 795157014, now seen corresponding path program 1 times [2019-10-15 03:10:24,763 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:24,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024878846] [2019-10-15 03:10:24,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:24,764 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:24,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-15 03:10:24,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024878846] [2019-10-15 03:10:24,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:10:24,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:10:24,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021277434] [2019-10-15 03:10:24,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:10:24,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:10:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:10:24,996 INFO L87 Difference]: Start difference. First operand 12871 states and 20628 transitions. Second operand 5 states. [2019-10-15 03:10:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:25,594 INFO L93 Difference]: Finished difference Result 25886 states and 42190 transitions. [2019-10-15 03:10:25,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:10:25,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-15 03:10:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:25,752 INFO L225 Difference]: With dead ends: 25886 [2019-10-15 03:10:25,752 INFO L226 Difference]: Without dead ends: 13058 [2019-10-15 03:10:25,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:10:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13058 states. [2019-10-15 03:10:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13058 to 13055. [2019-10-15 03:10:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13055 states. [2019-10-15 03:10:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13055 states to 13055 states and 20974 transitions. [2019-10-15 03:10:26,932 INFO L78 Accepts]: Start accepts. Automaton has 13055 states and 20974 transitions. Word has length 186 [2019-10-15 03:10:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:26,933 INFO L462 AbstractCegarLoop]: Abstraction has 13055 states and 20974 transitions. [2019-10-15 03:10:26,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:10:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 13055 states and 20974 transitions. [2019-10-15 03:10:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-15 03:10:26,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:26,945 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:10:26,946 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash 338406242, now seen corresponding path program 1 times [2019-10-15 03:10:26,946 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:26,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353918619] [2019-10-15 03:10:26,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:26,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:26,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-10-15 03:10:27,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353918619] [2019-10-15 03:10:27,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352850854] [2019-10-15 03:10:27,271 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 [2019-10-15 03:10:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:27,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 3459 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:10:27,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:10:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 03:10:28,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:10:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-10-15 03:10:29,159 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:10:29,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 03:10:29,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215702942] [2019-10-15 03:10:29,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:10:29,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:10:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:10:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:10:29,163 INFO L87 Difference]: Start difference. First operand 13055 states and 20974 transitions. Second operand 4 states. [2019-10-15 03:10:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:10:30,593 INFO L93 Difference]: Finished difference Result 27393 states and 45200 transitions. [2019-10-15 03:10:30,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:10:30,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 195 [2019-10-15 03:10:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:10:30,708 INFO L225 Difference]: With dead ends: 27393 [2019-10-15 03:10:30,708 INFO L226 Difference]: Without dead ends: 14381 [2019-10-15 03:10:30,776 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:10:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14381 states. [2019-10-15 03:10:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14381 to 14381. [2019-10-15 03:10:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14381 states. [2019-10-15 03:10:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14381 states to 14381 states and 23456 transitions. [2019-10-15 03:10:31,975 INFO L78 Accepts]: Start accepts. Automaton has 14381 states and 23456 transitions. Word has length 195 [2019-10-15 03:10:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:10:31,976 INFO L462 AbstractCegarLoop]: Abstraction has 14381 states and 23456 transitions. [2019-10-15 03:10:31,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:10:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 14381 states and 23456 transitions. [2019-10-15 03:10:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 03:10:31,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:10:31,991 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:10:32,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:10:32,205 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:10:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:10:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1200519654, now seen corresponding path program 1 times [2019-10-15 03:10:32,207 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:10:32,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562398390] [2019-10-15 03:10:32,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:32,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:10:32,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:10:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:10:32,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562398390] [2019-10-15 03:10:32,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578798738] [2019-10-15 03:10:32,607 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 [2019-10-15 03:10:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:10:34,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 3464 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:10:34,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:10:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:10:34,426 INFO L321 TraceCheckSpWp]: Computing backward predicates...