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_spec14_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:02:22,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:02:22,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:02:22,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:02:22,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:02:22,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:02:22,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:02:22,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:02:22,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:02:22,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:02:22,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:02:22,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:02:22,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:02:22,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:02:22,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:02:22,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:02:22,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:02:22,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:02:22,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:02:22,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:02:22,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:02:22,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:02:22,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:02:22,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:02:22,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:02:22,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:02:22,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:02:22,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:02:22,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:02:22,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:02:22,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:02:22,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:02:22,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:02:22,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:02:22,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:02:22,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:02:22,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:02:22,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:02:22,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:02:22,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:02:22,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:02:22,883 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 23:02:22,916 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:02:22,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:02:22,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:02:22,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:02:22,921 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:02:22,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:02:22,921 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:02:22,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:02:22,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:02:22,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:02:22,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:02:22,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:02:22,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:02:22,922 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:02:22,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:02:22,923 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:02:22,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:02:22,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:02:22,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:02:22,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:02:22,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:02:22,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:02:22,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:02:22,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:02:22,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:02:22,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:02:22,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:02:22,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:02:22,929 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 23:02:23,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:02:23,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:02:23,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:02:23,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:02:23,250 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:02:23,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product24.cil.c [2019-10-13 23:02:23,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd079ee9/efeebd15d733436c8220ed55a2ccc50e/FLAG649e9ddd3 [2019-10-13 23:02:23,903 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:02:23,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product24.cil.c [2019-10-13 23:02:23,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd079ee9/efeebd15d733436c8220ed55a2ccc50e/FLAG649e9ddd3 [2019-10-13 23:02:24,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd079ee9/efeebd15d733436c8220ed55a2ccc50e [2019-10-13 23:02:24,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:02:24,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:02:24,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:02:24,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:02:24,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:02:24,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:24" (1/1) ... [2019-10-13 23:02:24,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@507cfa22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:24, skipping insertion in model container [2019-10-13 23:02:24,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:24" (1/1) ... [2019-10-13 23:02:24,139 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:02:24,226 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:02:25,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:02:25,100 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:02:25,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:02:25,337 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:02:25,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25 WrapperNode [2019-10-13 23:02:25,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:02:25,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:02:25,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:02:25,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:02:25,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (1/1) ... [2019-10-13 23:02:25,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:02:25,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:02:25,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:02:25,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:02:25,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (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 23:02:25,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:02:25,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:02:25,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:02:25,668 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:02:25,668 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:02:25,669 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:02:25,670 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:02:25,670 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:02:25,670 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:02:25,670 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:02:25,671 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:02:25,672 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:02:25,672 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:02:25,672 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:02:25,672 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:02:25,673 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:02:25,675 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:02:25,675 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:02:25,675 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:02:25,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:02:25,676 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:02:25,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-13 23:02:25,677 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:02:25,677 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:02:25,677 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:02:25,677 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:02:25,678 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:02:25,678 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:02:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:02:25,680 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:02:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:02:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:02:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:02:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:02:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:02:25,681 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 23:02:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:02:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 23:02:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:02:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:02:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:02:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:02:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:02:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:02:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:02:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:02:25,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:02:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:02:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:02:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:02:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:02:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:02:25,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:02:25,685 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:02:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:02:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:02:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:02:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:02:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:02:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:02:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:02:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:02:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:02:25,687 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:02:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:02:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:02:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:02:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:02:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:02:25,688 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:02:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:02:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:02:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:02:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:02:25,689 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:02:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:02:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:02:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:02:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:02:25,690 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:02:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:02:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:02:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:02:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:02:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:02:25,691 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:02:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:02:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:02:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:02:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:02:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:02:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:02:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:02:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:02:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:02:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-13 23:02:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:02:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:02:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:02:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:02:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:02:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:02:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:02:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:02:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:02:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:02:25,695 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:02:25,696 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:02:25,696 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:02:25,696 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:02:25,696 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:02:25,696 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:02:25,697 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:02:25,697 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:02:25,697 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:02:25,697 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:02:25,697 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:02:25,698 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:02:25,698 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:02:25,698 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:02:25,698 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:02:25,698 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:02:25,698 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:02:25,699 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:02:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:02:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:02:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:02:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:02:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:02:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:02:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:02:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:02:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:02:25,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:02:30,507 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:02:30,507 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:02:30,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:30 BoogieIcfgContainer [2019-10-13 23:02:30,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:02:30,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:02:30,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:02:30,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:02:30,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:02:24" (1/3) ... [2019-10-13 23:02:30,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5bc264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:30, skipping insertion in model container [2019-10-13 23:02:30,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:25" (2/3) ... [2019-10-13 23:02:30,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5bc264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:30, skipping insertion in model container [2019-10-13 23:02:30,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:30" (3/3) ... [2019-10-13 23:02:30,518 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2019-10-13 23:02:30,529 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:02:30,539 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:02:30,551 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:02:30,581 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:02:30,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:02:30,582 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:02:30,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:02:30,582 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:02:30,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:02:30,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:02:30,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:02:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states. [2019-10-13 23:02:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:02:30,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:30,631 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:30,633 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:30,640 INFO L82 PathProgramCache]: Analyzing trace with hash 226367558, now seen corresponding path program 1 times [2019-10-13 23:02:30,650 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:30,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920047322] [2019-10-13 23:02:30,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:30,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:30,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:02:31,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920047322] [2019-10-13 23:02:31,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:31,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:02:31,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802923786] [2019-10-13 23:02:31,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:02:31,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:02:31,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:02:31,415 INFO L87 Difference]: Start difference. First operand 580 states. Second operand 3 states. [2019-10-13 23:02:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:31,823 INFO L93 Difference]: Finished difference Result 1322 states and 1982 transitions. [2019-10-13 23:02:31,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:02:31,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-13 23:02:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:31,862 INFO L225 Difference]: With dead ends: 1322 [2019-10-13 23:02:31,862 INFO L226 Difference]: Without dead ends: 870 [2019-10-13 23:02:31,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:02:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2019-10-13 23:02:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 827. [2019-10-13 23:02:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2019-10-13 23:02:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1234 transitions. [2019-10-13 23:02:32,035 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1234 transitions. Word has length 72 [2019-10-13 23:02:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:32,036 INFO L462 AbstractCegarLoop]: Abstraction has 827 states and 1234 transitions. [2019-10-13 23:02:32,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:02:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1234 transitions. [2019-10-13 23:02:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 23:02:32,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:32,058 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-10-13 23:02:32,059 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:32,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1192932849, now seen corresponding path program 1 times [2019-10-13 23:02:32,062 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:32,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117003638] [2019-10-13 23:02:32,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:32,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:32,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:32,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117003638] [2019-10-13 23:02:32,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099343613] [2019-10-13 23:02:32,532 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 23:02:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:33,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:02:33,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:02:33,351 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:33,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:33,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-10-13 23:02:33,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281639964] [2019-10-13 23:02:33,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:02:33,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:02:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:02:33,651 INFO L87 Difference]: Start difference. First operand 827 states and 1234 transitions. Second operand 6 states. [2019-10-13 23:02:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:34,351 INFO L93 Difference]: Finished difference Result 1906 states and 2820 transitions. [2019-10-13 23:02:34,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:02:34,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-13 23:02:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:34,365 INFO L225 Difference]: With dead ends: 1906 [2019-10-13 23:02:34,365 INFO L226 Difference]: Without dead ends: 1109 [2019-10-13 23:02:34,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2019-10-13 23:02:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102. [2019-10-13 23:02:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2019-10-13 23:02:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1596 transitions. [2019-10-13 23:02:34,471 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1596 transitions. Word has length 119 [2019-10-13 23:02:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:34,473 INFO L462 AbstractCegarLoop]: Abstraction has 1102 states and 1596 transitions. [2019-10-13 23:02:34,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:02:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1596 transitions. [2019-10-13 23:02:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:02:34,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:34,487 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-10-13 23:02:34,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:34,691 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:34,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:34,691 INFO L82 PathProgramCache]: Analyzing trace with hash -914410689, now seen corresponding path program 1 times [2019-10-13 23:02:34,692 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:34,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077264578] [2019-10-13 23:02:34,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:34,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:34,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 23:02:34,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077264578] [2019-10-13 23:02:34,960 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:34,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:34,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071161732] [2019-10-13 23:02:34,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:34,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:34,962 INFO L87 Difference]: Start difference. First operand 1102 states and 1596 transitions. Second operand 7 states. [2019-10-13 23:02:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:39,279 INFO L93 Difference]: Finished difference Result 3083 states and 4543 transitions. [2019-10-13 23:02:39,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:02:39,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-10-13 23:02:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:39,302 INFO L225 Difference]: With dead ends: 3083 [2019-10-13 23:02:39,303 INFO L226 Difference]: Without dead ends: 2013 [2019-10-13 23:02:39,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2019-10-13 23:02:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1918. [2019-10-13 23:02:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2019-10-13 23:02:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2822 transitions. [2019-10-13 23:02:39,474 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2822 transitions. Word has length 120 [2019-10-13 23:02:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:39,476 INFO L462 AbstractCegarLoop]: Abstraction has 1918 states and 2822 transitions. [2019-10-13 23:02:39,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2822 transitions. [2019-10-13 23:02:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 23:02:39,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:39,485 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 23:02:39,485 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2039267797, now seen corresponding path program 1 times [2019-10-13 23:02:39,486 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:39,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958202194] [2019-10-13 23:02:39,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:39,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:39,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:39,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958202194] [2019-10-13 23:02:39,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:39,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:39,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806653411] [2019-10-13 23:02:39,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:39,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:39,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:39,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:39,773 INFO L87 Difference]: Start difference. First operand 1918 states and 2822 transitions. Second operand 9 states. [2019-10-13 23:02:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:43,960 INFO L93 Difference]: Finished difference Result 2097 states and 3104 transitions. [2019-10-13 23:02:43,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 23:02:43,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-10-13 23:02:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:43,975 INFO L225 Difference]: With dead ends: 2097 [2019-10-13 23:02:43,976 INFO L226 Difference]: Without dead ends: 2094 [2019-10-13 23:02:43,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-10-13 23:02:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2014. [2019-10-13 23:02:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2014 states. [2019-10-13 23:02:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 2981 transitions. [2019-10-13 23:02:44,096 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 2981 transitions. Word has length 124 [2019-10-13 23:02:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:44,097 INFO L462 AbstractCegarLoop]: Abstraction has 2014 states and 2981 transitions. [2019-10-13 23:02:44,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 2981 transitions. [2019-10-13 23:02:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 23:02:44,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:44,105 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:44,106 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash -368058761, now seen corresponding path program 1 times [2019-10-13 23:02:44,106 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:44,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194437737] [2019-10-13 23:02:44,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:44,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:44,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-13 23:02:44,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194437737] [2019-10-13 23:02:44,341 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:44,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:02:44,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330538164] [2019-10-13 23:02:44,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:44,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:44,344 INFO L87 Difference]: Start difference. First operand 2014 states and 2981 transitions. Second operand 5 states. [2019-10-13 23:02:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:44,461 INFO L93 Difference]: Finished difference Result 4021 states and 5999 transitions. [2019-10-13 23:02:44,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:44,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-13 23:02:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:44,480 INFO L225 Difference]: With dead ends: 4021 [2019-10-13 23:02:44,480 INFO L226 Difference]: Without dead ends: 2038 [2019-10-13 23:02:44,492 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 [2019-10-13 23:02:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2019-10-13 23:02:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 2038. [2019-10-13 23:02:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2038 states. [2019-10-13 23:02:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 3005 transitions. [2019-10-13 23:02:44,594 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 3005 transitions. Word has length 160 [2019-10-13 23:02:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:44,596 INFO L462 AbstractCegarLoop]: Abstraction has 2038 states and 3005 transitions. [2019-10-13 23:02:44,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 3005 transitions. [2019-10-13 23:02:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 23:02:44,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:44,606 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 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 23:02:44,606 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:44,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1887029752, now seen corresponding path program 1 times [2019-10-13 23:02:44,607 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:44,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234200274] [2019-10-13 23:02:44,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:44,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:44,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 23:02:44,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234200274] [2019-10-13 23:02:44,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920463385] [2019-10-13 23:02:44,852 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 23:02:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:45,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:45,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 23:02:45,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 23:02:45,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:45,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 23:02:45,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219252573] [2019-10-13 23:02:45,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:45,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:45,911 INFO L87 Difference]: Start difference. First operand 2038 states and 3005 transitions. Second operand 4 states. [2019-10-13 23:02:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:46,159 INFO L93 Difference]: Finished difference Result 4201 states and 6338 transitions. [2019-10-13 23:02:46,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:46,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-13 23:02:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:46,176 INFO L225 Difference]: With dead ends: 4201 [2019-10-13 23:02:46,176 INFO L226 Difference]: Without dead ends: 2194 [2019-10-13 23:02:46,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2019-10-13 23:02:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2019-10-13 23:02:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2194 states. [2019-10-13 23:02:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3297 transitions. [2019-10-13 23:02:46,295 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3297 transitions. Word has length 169 [2019-10-13 23:02:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:46,296 INFO L462 AbstractCegarLoop]: Abstraction has 2194 states and 3297 transitions. [2019-10-13 23:02:46,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3297 transitions. [2019-10-13 23:02:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 23:02:46,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:46,304 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 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 23:02:46,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:46,504 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1818494410, now seen corresponding path program 1 times [2019-10-13 23:02:46,505 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:46,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146174540] [2019-10-13 23:02:46,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:46,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:46,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 23:02:46,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146174540] [2019-10-13 23:02:46,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406571200] [2019-10-13 23:02:46,740 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 23:02:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:47,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 3195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:47,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 23:02:47,587 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 23:02:47,779 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:47,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:47,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498432330] [2019-10-13 23:02:47,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:47,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:47,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:47,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:47,780 INFO L87 Difference]: Start difference. First operand 2194 states and 3297 transitions. Second operand 4 states. [2019-10-13 23:02:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:48,035 INFO L93 Difference]: Finished difference Result 4513 states and 6918 transitions. [2019-10-13 23:02:48,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:48,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-13 23:02:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:48,052 INFO L225 Difference]: With dead ends: 4513 [2019-10-13 23:02:48,052 INFO L226 Difference]: Without dead ends: 2350 [2019-10-13 23:02:48,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2019-10-13 23:02:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2350. [2019-10-13 23:02:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-13 23:02:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3589 transitions. [2019-10-13 23:02:48,173 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3589 transitions. Word has length 174 [2019-10-13 23:02:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:48,176 INFO L462 AbstractCegarLoop]: Abstraction has 2350 states and 3589 transitions. [2019-10-13 23:02:48,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3589 transitions. [2019-10-13 23:02:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 23:02:48,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:48,184 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 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 23:02:48,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:48,393 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash 582729210, now seen corresponding path program 1 times [2019-10-13 23:02:48,394 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:48,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017819837] [2019-10-13 23:02:48,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:48,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:48,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:02:48,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017819837] [2019-10-13 23:02:48,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087712778] [2019-10-13 23:02:48,649 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 23:02:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:49,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:49,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 23:02:49,550 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 23:02:49,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:49,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:49,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045031540] [2019-10-13 23:02:49,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:49,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:49,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:49,791 INFO L87 Difference]: Start difference. First operand 2350 states and 3589 transitions. Second operand 4 states. [2019-10-13 23:02:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:50,050 INFO L93 Difference]: Finished difference Result 4825 states and 7498 transitions. [2019-10-13 23:02:50,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:50,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 23:02:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:50,067 INFO L225 Difference]: With dead ends: 4825 [2019-10-13 23:02:50,068 INFO L226 Difference]: Without dead ends: 2506 [2019-10-13 23:02:50,079 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2019-10-13 23:02:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2506. [2019-10-13 23:02:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2506 states. [2019-10-13 23:02:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3881 transitions. [2019-10-13 23:02:50,172 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3881 transitions. Word has length 178 [2019-10-13 23:02:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:50,173 INFO L462 AbstractCegarLoop]: Abstraction has 2506 states and 3881 transitions. [2019-10-13 23:02:50,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3881 transitions. [2019-10-13 23:02:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 23:02:50,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:50,180 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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, 1, 1, 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 23:02:50,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:50,389 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 623841128, now seen corresponding path program 1 times [2019-10-13 23:02:50,392 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:50,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773944552] [2019-10-13 23:02:50,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:50,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:50,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:50,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773944552] [2019-10-13 23:02:50,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952801108] [2019-10-13 23:02:50,606 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 23:02:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:51,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:51,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 23:02:51,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:51,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:51,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:51,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342380367] [2019-10-13 23:02:51,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:51,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:51,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:51,580 INFO L87 Difference]: Start difference. First operand 2506 states and 3881 transitions. Second operand 4 states. [2019-10-13 23:02:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:51,899 INFO L93 Difference]: Finished difference Result 5137 states and 8078 transitions. [2019-10-13 23:02:51,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:51,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-10-13 23:02:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:51,923 INFO L225 Difference]: With dead ends: 5137 [2019-10-13 23:02:51,924 INFO L226 Difference]: Without dead ends: 2662 [2019-10-13 23:02:51,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2019-10-13 23:02:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2662. [2019-10-13 23:02:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2019-10-13 23:02:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 4173 transitions. [2019-10-13 23:02:52,088 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 4173 transitions. Word has length 181 [2019-10-13 23:02:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:52,091 INFO L462 AbstractCegarLoop]: Abstraction has 2662 states and 4173 transitions. [2019-10-13 23:02:52,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 4173 transitions. [2019-10-13 23:02:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 23:02:52,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:52,104 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 2, 2, 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, 1, 1, 1, 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 23:02:52,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:52,322 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1767295928, now seen corresponding path program 1 times [2019-10-13 23:02:52,323 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:52,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385612419] [2019-10-13 23:02:52,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:52,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:52,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:52,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385612419] [2019-10-13 23:02:52,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:52,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:02:52,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504964642] [2019-10-13 23:02:52,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:52,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:52,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:02:52,500 INFO L87 Difference]: Start difference. First operand 2662 states and 4173 transitions. Second operand 4 states. [2019-10-13 23:02:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:52,734 INFO L93 Difference]: Finished difference Result 5461 states and 8654 transitions. [2019-10-13 23:02:52,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:52,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 183 [2019-10-13 23:02:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:52,751 INFO L225 Difference]: With dead ends: 5461 [2019-10-13 23:02:52,751 INFO L226 Difference]: Without dead ends: 2798 [2019-10-13 23:02:52,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:52,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2019-10-13 23:02:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2798. [2019-10-13 23:02:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2798 states. [2019-10-13 23:02:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4245 transitions. [2019-10-13 23:02:52,885 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4245 transitions. Word has length 183 [2019-10-13 23:02:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:52,885 INFO L462 AbstractCegarLoop]: Abstraction has 2798 states and 4245 transitions. [2019-10-13 23:02:52,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4245 transitions. [2019-10-13 23:02:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 23:02:52,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:52,894 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:52,894 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1943099161, now seen corresponding path program 1 times [2019-10-13 23:02:52,894 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:52,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046886035] [2019-10-13 23:02:52,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:52,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:52,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:53,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046886035] [2019-10-13 23:02:53,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:53,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:53,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265957236] [2019-10-13 23:02:53,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:53,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:53,236 INFO L87 Difference]: Start difference. First operand 2798 states and 4245 transitions. Second operand 9 states.