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_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:04:21,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:04:21,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:04:21,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:04:21,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:04:21,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:04:21,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:04:21,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:04:21,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:04:21,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:04:21,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:04:21,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:04:21,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:04:21,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:04:21,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:04:21,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:04:21,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:04:21,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:04:21,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:04:21,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:04:21,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:04:21,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:04:21,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:04:21,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:04:21,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:04:21,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:04:21,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:04:21,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:04:21,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:04:21,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:04:21,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:04:21,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:04:21,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:04:21,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:04:21,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:04:21,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:04:21,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:04:21,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:04:21,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:04:21,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:04:21,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:04:21,874 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 23:04:21,898 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:04:21,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:04:21,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:04:21,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:04:21,901 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:04:21,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:04:21,901 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:04:21,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:04:21,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:04:21,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:04:21,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:04:21,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:04:21,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:04:21,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:04:21,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:04:21,905 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:04:21,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:04:21,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:04:21,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:04:21,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:04:21,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:04:21,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:04:21,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:04:21,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:04:21,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:04:21,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:04:21,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:04:21,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:04:21,908 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 23:04:22,206 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:04:22,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:04:22,225 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:04:22,227 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:04:22,227 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:04:22,228 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product03.cil.c [2019-10-13 23:04:22,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6642d67ed/4d7b282420ae47d8a5ae42cceb93b7f4/FLAG5d08e49f1 [2019-10-13 23:04:23,011 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:04:23,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product03.cil.c [2019-10-13 23:04:23,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6642d67ed/4d7b282420ae47d8a5ae42cceb93b7f4/FLAG5d08e49f1 [2019-10-13 23:04:23,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6642d67ed/4d7b282420ae47d8a5ae42cceb93b7f4 [2019-10-13 23:04:23,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:04:23,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:04:23,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:23,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:04:23,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:04:23,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:23" (1/1) ... [2019-10-13 23:04:23,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c381ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:23, skipping insertion in model container [2019-10-13 23:04:23,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:23" (1/1) ... [2019-10-13 23:04:23,225 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:04:23,293 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:04:24,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:24,113 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:04:24,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:24,410 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:04:24,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24 WrapperNode [2019-10-13 23:04:24,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:24,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:04:24,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:04:24,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:04:24,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (1/1) ... [2019-10-13 23:04:24,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:04:24,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:04:24,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:04:24,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:04:24,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (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 23:04:24,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:04:24,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:04:24,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:24,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:24,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:04:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:04:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:04:24,748 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:04:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:04:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:04:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:04:24,750 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:04:24,753 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:04:24,753 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:04:24,753 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:04:24,755 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:04:24,755 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:04:24,755 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:04:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:04:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:04:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:04:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:04:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:04:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:04:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:04:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:04:24,757 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:04:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:04:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:04:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:04:24,758 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:04:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:04:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:04:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:04:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:04:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:04:24,759 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:04:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__base [2019-10-13 23:04:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:04:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:04:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:04:24,760 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-10-13 23:04:24,761 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:24,761 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:04:24,762 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:04:24,762 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:04:24,762 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:04:24,762 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:04:24,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:04:24,763 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:04:24,763 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:04:24,763 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:04:24,763 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:04:24,763 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:04:24,764 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:04:24,764 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:04:24,764 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:04:24,765 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:04:24,765 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:04:24,765 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:04:24,765 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:04:24,766 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:04:24,766 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:04:24,766 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:04:24,766 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:04:24,767 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:04:24,767 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:04:24,767 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:04:24,767 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:04:24,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:04:24,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:04:24,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:04:24,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:04:24,770 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:04:24,770 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:04:24,771 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:04:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:04:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:04:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:04:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:04:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:04:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:04:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:04:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:04:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:04:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:04:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:04:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:04:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:04:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:04:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:04:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:04:24,777 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:04:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:04:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:04:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:04:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:04:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:04:24,779 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:04:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:04:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:04:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:04:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:04:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:04:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:04:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:04:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:04:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:04:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:04:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:04:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:04:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:04:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:04:24,783 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:04:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:04:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:04:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:04:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:04:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:04:24,788 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:04:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__base [2019-10-13 23:04:24,789 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:04:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:04:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-10-13 23:04:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:04:24,790 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:04:24,791 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:04:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:04:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:04:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:04:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:04:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:04:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:04:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:04:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:04:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:04:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:04:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:04:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:04:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:04:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:04:24,801 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:04:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:04:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:04:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:04:24,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:04:29,617 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:04:29,617 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:04:29,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:29 BoogieIcfgContainer [2019-10-13 23:04:29,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:04:29,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:04:29,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:04:29,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:04:29,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:04:23" (1/3) ... [2019-10-13 23:04:29,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4ae4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:29, skipping insertion in model container [2019-10-13 23:04:29,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:24" (2/3) ... [2019-10-13 23:04:29,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4ae4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:29, skipping insertion in model container [2019-10-13 23:04:29,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:29" (3/3) ... [2019-10-13 23:04:29,632 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2019-10-13 23:04:29,643 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:04:29,653 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:04:29,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:04:29,698 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:04:29,698 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:04:29,699 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:04:29,699 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:04:29,699 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:04:29,699 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:04:29,699 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:04:29,699 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:04:29,735 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states. [2019-10-13 23:04:29,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 23:04:29,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:29,761 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 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] [2019-10-13 23:04:29,764 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2099438583, now seen corresponding path program 1 times [2019-10-13 23:04:29,783 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:29,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464050153] [2019-10-13 23:04:29,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:29,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:29,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:04:30,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464050153] [2019-10-13 23:04:30,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143439560] [2019-10-13 23:04:30,577 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 23:04:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:31,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 2982 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:04:31,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:04:31,355 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:04:31,519 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:31,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 23:04:31,520 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476835464] [2019-10-13 23:04:31,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:04:31,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:04:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:04:31,542 INFO L87 Difference]: Start difference. First operand 581 states. Second operand 3 states. [2019-10-13 23:04:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:31,810 INFO L93 Difference]: Finished difference Result 1265 states and 1950 transitions. [2019-10-13 23:04:31,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:04:31,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2019-10-13 23:04:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:31,846 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 23:04:31,847 INFO L226 Difference]: Without dead ends: 816 [2019-10-13 23:04:31,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 237 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 23:04:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2019-10-13 23:04:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 803. [2019-10-13 23:04:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-10-13 23:04:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1222 transitions. [2019-10-13 23:04:32,024 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1222 transitions. Word has length 118 [2019-10-13 23:04:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:32,025 INFO L462 AbstractCegarLoop]: Abstraction has 803 states and 1222 transitions. [2019-10-13 23:04:32,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:04:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1222 transitions. [2019-10-13 23:04:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 23:04:32,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:32,036 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 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] [2019-10-13 23:04:32,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:32,245 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1494326674, now seen corresponding path program 1 times [2019-10-13 23:04:32,246 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:32,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516960063] [2019-10-13 23:04:32,247 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:32,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:32,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:04:32,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516960063] [2019-10-13 23:04:32,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:32,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:04:32,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893942855] [2019-10-13 23:04:32,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:04:32,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:04:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:04:32,654 INFO L87 Difference]: Start difference. First operand 803 states and 1222 transitions. Second operand 7 states. [2019-10-13 23:04:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:35,641 INFO L93 Difference]: Finished difference Result 3066 states and 4800 transitions. [2019-10-13 23:04:35,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 23:04:35,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2019-10-13 23:04:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:35,663 INFO L225 Difference]: With dead ends: 3066 [2019-10-13 23:04:35,663 INFO L226 Difference]: Without dead ends: 2294 [2019-10-13 23:04:35,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:04:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2019-10-13 23:04:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2219. [2019-10-13 23:04:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2019-10-13 23:04:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3464 transitions. [2019-10-13 23:04:35,822 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3464 transitions. Word has length 119 [2019-10-13 23:04:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:35,823 INFO L462 AbstractCegarLoop]: Abstraction has 2219 states and 3464 transitions. [2019-10-13 23:04:35,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:04:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3464 transitions. [2019-10-13 23:04:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 23:04:35,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:35,829 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 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] [2019-10-13 23:04:35,829 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:35,830 INFO L82 PathProgramCache]: Analyzing trace with hash 746786505, now seen corresponding path program 1 times [2019-10-13 23:04:35,830 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:35,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475986850] [2019-10-13 23:04:35,830 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:35,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:35,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:04:36,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475986850] [2019-10-13 23:04:36,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427391513] [2019-10-13 23:04:36,143 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 23:04:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:36,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 2996 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:04:36,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 23:04:36,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:04:36,953 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:36,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-13 23:04:36,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378625314] [2019-10-13 23:04:36,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:04:36,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:04:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:36,956 INFO L87 Difference]: Start difference. First operand 2219 states and 3464 transitions. Second operand 4 states. [2019-10-13 23:04:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:37,136 INFO L93 Difference]: Finished difference Result 4254 states and 6711 transitions. [2019-10-13 23:04:37,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:04:37,137 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-13 23:04:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:37,159 INFO L225 Difference]: With dead ends: 4254 [2019-10-13 23:04:37,160 INFO L226 Difference]: Without dead ends: 2066 [2019-10-13 23:04:37,176 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 243 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 23:04:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2019-10-13 23:04:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2016. [2019-10-13 23:04:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2019-10-13 23:04:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3115 transitions. [2019-10-13 23:04:37,313 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3115 transitions. Word has length 121 [2019-10-13 23:04:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:37,314 INFO L462 AbstractCegarLoop]: Abstraction has 2016 states and 3115 transitions. [2019-10-13 23:04:37,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:04:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3115 transitions. [2019-10-13 23:04:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 23:04:37,320 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:37,320 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 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] [2019-10-13 23:04:37,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:37,531 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1903198849, now seen corresponding path program 1 times [2019-10-13 23:04:37,532 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:37,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609310424] [2019-10-13 23:04:37,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:37,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:37,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:04:37,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609310424] [2019-10-13 23:04:37,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259320098] [2019-10-13 23:04:37,781 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 23:04:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:38,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:04:38,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:04:38,481 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:04:38,589 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:38,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 23:04:38,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606828581] [2019-10-13 23:04:38,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:04:38,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:38,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:04:38,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:04:38,591 INFO L87 Difference]: Start difference. First operand 2016 states and 3115 transitions. Second operand 3 states. [2019-10-13 23:04:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:38,767 INFO L93 Difference]: Finished difference Result 5044 states and 7944 transitions. [2019-10-13 23:04:38,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:04:38,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-13 23:04:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:38,794 INFO L225 Difference]: With dead ends: 5044 [2019-10-13 23:04:38,795 INFO L226 Difference]: Without dead ends: 3059 [2019-10-13 23:04:38,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:04:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2019-10-13 23:04:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 2974. [2019-10-13 23:04:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2974 states. [2019-10-13 23:04:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 4625 transitions. [2019-10-13 23:04:38,995 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 4625 transitions. Word has length 119 [2019-10-13 23:04:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:38,996 INFO L462 AbstractCegarLoop]: Abstraction has 2974 states and 4625 transitions. [2019-10-13 23:04:38,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:04:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 4625 transitions. [2019-10-13 23:04:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:04:39,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:39,003 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 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] [2019-10-13 23:04:39,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:39,223 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash -104889300, now seen corresponding path program 1 times [2019-10-13 23:04:39,224 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:39,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801234992] [2019-10-13 23:04:39,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:39,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:39,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:04:39,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801234992] [2019-10-13 23:04:39,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138689767] [2019-10-13 23:04:39,512 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 23:04:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:40,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 2996 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:04:40,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 23:04:40,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:40,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:04:40,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:04:40,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-10-13 23:04:40,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892464038] [2019-10-13 23:04:40,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:04:40,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:04:40,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:04:40,500 INFO L87 Difference]: Start difference. First operand 2974 states and 4625 transitions. Second operand 6 states. [2019-10-13 23:04:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:41,675 INFO L93 Difference]: Finished difference Result 7797 states and 12341 transitions. [2019-10-13 23:04:41,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:04:41,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-10-13 23:04:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:41,716 INFO L225 Difference]: With dead ends: 7797 [2019-10-13 23:04:41,716 INFO L226 Difference]: Without dead ends: 4854 [2019-10-13 23:04:41,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:04:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2019-10-13 23:04:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 4818. [2019-10-13 23:04:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4818 states. [2019-10-13 23:04:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 7367 transitions. [2019-10-13 23:04:42,003 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 7367 transitions. Word has length 120 [2019-10-13 23:04:42,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:42,004 INFO L462 AbstractCegarLoop]: Abstraction has 4818 states and 7367 transitions. [2019-10-13 23:04:42,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:04:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 7367 transitions. [2019-10-13 23:04:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 23:04:42,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:42,011 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 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] [2019-10-13 23:04:42,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:42,230 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1646523800, now seen corresponding path program 1 times [2019-10-13 23:04:42,231 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:42,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634047919] [2019-10-13 23:04:42,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:42,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:42,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 23:04:42,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634047919] [2019-10-13 23:04:42,519 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:42,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:04:42,520 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519341541] [2019-10-13 23:04:42,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:04:42,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:04:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:42,523 INFO L87 Difference]: Start difference. First operand 4818 states and 7367 transitions. Second operand 10 states. [2019-10-13 23:04:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:45,713 INFO L93 Difference]: Finished difference Result 17022 states and 26706 transitions. [2019-10-13 23:04:45,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:04:45,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 125 [2019-10-13 23:04:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:45,844 INFO L225 Difference]: With dead ends: 17022 [2019-10-13 23:04:45,844 INFO L226 Difference]: Without dead ends: 12235 [2019-10-13 23:04:45,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:04:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12235 states. [2019-10-13 23:04:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12235 to 12080. [2019-10-13 23:04:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12080 states. [2019-10-13 23:04:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12080 states to 12080 states and 18752 transitions. [2019-10-13 23:04:47,267 INFO L78 Accepts]: Start accepts. Automaton has 12080 states and 18752 transitions. Word has length 125 [2019-10-13 23:04:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:47,268 INFO L462 AbstractCegarLoop]: Abstraction has 12080 states and 18752 transitions. [2019-10-13 23:04:47,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:04:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 12080 states and 18752 transitions. [2019-10-13 23:04:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 23:04:47,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:47,272 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1] [2019-10-13 23:04:47,272 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1902884276, now seen corresponding path program 1 times [2019-10-13 23:04:47,273 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:47,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357591032] [2019-10-13 23:04:47,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:47,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:47,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:04:47,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357591032] [2019-10-13 23:04:47,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949064607] [2019-10-13 23:04:47,523 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 23:04:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:48,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 3026 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:04:48,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 23:04:48,373 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:04:48,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:04:48,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2019-10-13 23:04:48,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039074721] [2019-10-13 23:04:48,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:04:48,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:04:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:04:48,618 INFO L87 Difference]: Start difference. First operand 12080 states and 18752 transitions. Second operand 7 states. [2019-10-13 23:04:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:51,158 INFO L93 Difference]: Finished difference Result 25422 states and 39436 transitions. [2019-10-13 23:04:51,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:04:51,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2019-10-13 23:04:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:51,264 INFO L225 Difference]: With dead ends: 25422 [2019-10-13 23:04:51,265 INFO L226 Difference]: Without dead ends: 13373 [2019-10-13 23:04:51,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:04:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13373 states. [2019-10-13 23:04:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13373 to 13326. [2019-10-13 23:04:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13326 states. [2019-10-13 23:04:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 20435 transitions. [2019-10-13 23:04:52,079 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 20435 transitions. Word has length 131 [2019-10-13 23:04:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:52,080 INFO L462 AbstractCegarLoop]: Abstraction has 13326 states and 20435 transitions. [2019-10-13 23:04:52,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:04:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 20435 transitions. [2019-10-13 23:04:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 23:04:52,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:52,084 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:52,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:52,293 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:52,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:52,293 INFO L82 PathProgramCache]: Analyzing trace with hash 724432837, now seen corresponding path program 1 times [2019-10-13 23:04:52,294 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:52,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367666853] [2019-10-13 23:04:52,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:52,294 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:52,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:04:52,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367666853] [2019-10-13 23:04:52,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:52,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:04:52,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797851903] [2019-10-13 23:04:52,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:04:52,475 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:04:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:52,476 INFO L87 Difference]: Start difference. First operand 13326 states and 20435 transitions. Second operand 10 states. [2019-10-13 23:04:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:52,861 INFO L93 Difference]: Finished difference Result 24892 states and 38363 transitions. [2019-10-13 23:04:52,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 23:04:52,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2019-10-13 23:04:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:52,939 INFO L225 Difference]: With dead ends: 24892 [2019-10-13 23:04:52,939 INFO L226 Difference]: Without dead ends: 13570 [2019-10-13 23:04:52,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13570 states. [2019-10-13 23:04:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13570 to 13570. [2019-10-13 23:04:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13570 states. [2019-10-13 23:04:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13570 states to 13570 states and 20761 transitions. [2019-10-13 23:04:53,840 INFO L78 Accepts]: Start accepts. Automaton has 13570 states and 20761 transitions. Word has length 136 [2019-10-13 23:04:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:53,841 INFO L462 AbstractCegarLoop]: Abstraction has 13570 states and 20761 transitions. [2019-10-13 23:04:53,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:04:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 13570 states and 20761 transitions. [2019-10-13 23:04:53,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:04:53,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:53,845 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:53,846 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2029833286, now seen corresponding path program 1 times [2019-10-13 23:04:53,846 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:53,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201552562] [2019-10-13 23:04:53,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:53,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:53,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:04:54,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201552562] [2019-10-13 23:04:54,046 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:54,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:04:54,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47478339] [2019-10-13 23:04:54,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:04:54,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:04:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:54,048 INFO L87 Difference]: Start difference. First operand 13570 states and 20761 transitions. Second operand 10 states.