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_spec13_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:01:53,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:01:53,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:01:53,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:01:53,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:01:53,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:01:53,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:01:53,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:01:53,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:01:53,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:01:53,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:01:53,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:01:53,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:01:53,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:01:53,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:01:53,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:01:53,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:01:53,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:01:53,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:01:53,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:01:53,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:01:53,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:01:53,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:01:53,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:01:53,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:01:53,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:01:53,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:01:53,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:01:53,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:01:53,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:01:53,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:01:53,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:01:53,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:01:53,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:01:53,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:01:53,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:01:53,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:01:53,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:01:53,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:01:53,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:01:53,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:01:53,119 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 23:01:53,133 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:01:53,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:01:53,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:01:53,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:01:53,135 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:01:53,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:01:53,135 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:01:53,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:01:53,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:01:53,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:01:53,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:01:53,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:01:53,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:01:53,137 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:01:53,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:01:53,137 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:01:53,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:01:53,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:01:53,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:01:53,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:01:53,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:01:53,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:53,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:01:53,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:01:53,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:01:53,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:01:53,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:01:53,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:01:53,139 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 23:01:53,434 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:01:53,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:01:53,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:01:53,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:01:53,455 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:01:53,455 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-10-13 23:01:53,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59dc328eb/d0bafb39cbac40afb0f02055e0326b48/FLAG6e5bba2f7 [2019-10-13 23:01:54,242 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:01:54,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-10-13 23:01:54,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59dc328eb/d0bafb39cbac40afb0f02055e0326b48/FLAG6e5bba2f7 [2019-10-13 23:01:54,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59dc328eb/d0bafb39cbac40afb0f02055e0326b48 [2019-10-13 23:01:54,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:01:54,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:01:54,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:54,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:01:54,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:01:54,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:54" (1/1) ... [2019-10-13 23:01:54,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e285c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:54, skipping insertion in model container [2019-10-13 23:01:54,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:54" (1/1) ... [2019-10-13 23:01:54,422 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:01:54,517 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:01:55,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:55,226 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:01:55,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:55,461 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:01:55,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55 WrapperNode [2019-10-13 23:01:55,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:55,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:01:55,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:01:55,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:01:55,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (1/1) ... [2019-10-13 23:01:55,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:01:55,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:01:55,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:01:55,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:01:55,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (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 23:01:55,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:01:55,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:01:55,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:55,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:01:55,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:55,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:55,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:55,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:01:55,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:01:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:01:55,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:01:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:01:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:01:55,826 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:01:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:01:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:01:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:01:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:01:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:01:55,830 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:01:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:01:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:01:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:01:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:01:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:01:55,831 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:01:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:01:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:01:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:01:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:01:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:01:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:01:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:01:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:01:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:01:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:01:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:01:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:01:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:01:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:01:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:01:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:01:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:01:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:01:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:01:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:01:55,836 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:01:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:01:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:01:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:01:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:01:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:01:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:01:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:01:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:01:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:01:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:01:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:01:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:01:55,839 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:01:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:01:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:01:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:01:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:01:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:01:55,840 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:01:55,841 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:01:55,841 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:55,841 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:01:55,841 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:01:55,841 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:01:55,842 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:01:55,842 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:01:55,843 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:01:55,843 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:01:55,843 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:01:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:01:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:01:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:01:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:01:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:01:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:01:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:01:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:01:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:01:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:01:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:01:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:01:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:01:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:01:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:01:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:01:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:01:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:01:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:01:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:01:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:01:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:01:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:01:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:01:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:01:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:01:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:01:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:01:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:01:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:01:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:01:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:01:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:01:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:01:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:01:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:01:55,851 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:01:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:01:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:01:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:01:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:01:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:01:55,852 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:01:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:01:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:01:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:01:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:01:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:01:55,853 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:01:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:01:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:01:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:01:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:01:55,854 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:01:55,855 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:01:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:01:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:01:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:01:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:01:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:01:55,856 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:01:55,857 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:01:55,858 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:01:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:01:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:02:00,895 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:02:00,896 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:02:00,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:00 BoogieIcfgContainer [2019-10-13 23:02:00,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:02:00,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:02:00,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:02:00,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:02:00,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:01:54" (1/3) ... [2019-10-13 23:02:00,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a448e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:00, skipping insertion in model container [2019-10-13 23:02:00,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:55" (2/3) ... [2019-10-13 23:02:00,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56a448e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:00, skipping insertion in model container [2019-10-13 23:02:00,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:00" (3/3) ... [2019-10-13 23:02:00,906 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2019-10-13 23:02:00,915 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:02:00,924 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:02:00,935 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:02:00,969 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:02:00,970 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:02:00,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:02:00,970 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:02:00,970 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:02:00,970 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:02:00,970 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:02:00,970 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:02:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states. [2019-10-13 23:02:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 23:02:01,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:01,047 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:01,049 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:01,055 INFO L82 PathProgramCache]: Analyzing trace with hash -118967536, now seen corresponding path program 1 times [2019-10-13 23:02:01,066 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:01,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449149951] [2019-10-13 23:02:01,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:01,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:01,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:01,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449149951] [2019-10-13 23:02:01,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170901776] [2019-10-13 23:02:01,792 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 23:02:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:02,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 23:02:02,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:02,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:02,653 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:02,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-10-13 23:02:02,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641319571] [2019-10-13 23:02:02,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:02:02,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:02:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:02:02,673 INFO L87 Difference]: Start difference. First operand 621 states. Second operand 2 states. [2019-10-13 23:02:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:02,765 INFO L93 Difference]: Finished difference Result 992 states and 1498 transitions. [2019-10-13 23:02:02,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:02:02,767 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 133 [2019-10-13 23:02:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:02,813 INFO L225 Difference]: With dead ends: 992 [2019-10-13 23:02:02,814 INFO L226 Difference]: Without dead ends: 504 [2019-10-13 23:02:02,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:02:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2019-10-13 23:02:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2019-10-13 23:02:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2019-10-13 23:02:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 745 transitions. [2019-10-13 23:02:02,946 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 745 transitions. Word has length 133 [2019-10-13 23:02:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:02,948 INFO L462 AbstractCegarLoop]: Abstraction has 504 states and 745 transitions. [2019-10-13 23:02:02,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:02:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 745 transitions. [2019-10-13 23:02:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 23:02:02,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:02,956 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:03,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:03,165 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1296682160, now seen corresponding path program 1 times [2019-10-13 23:02:03,167 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:03,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480108443] [2019-10-13 23:02:03,167 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:03,168 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:03,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:02:03,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480108443] [2019-10-13 23:02:03,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:03,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:02:03,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339091994] [2019-10-13 23:02:03,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:03,545 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:03,546 INFO L87 Difference]: Start difference. First operand 504 states and 745 transitions. Second operand 5 states. [2019-10-13 23:02:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:04,457 INFO L93 Difference]: Finished difference Result 1438 states and 2166 transitions. [2019-10-13 23:02:04,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:04,457 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-10-13 23:02:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:04,467 INFO L225 Difference]: With dead ends: 1438 [2019-10-13 23:02:04,467 INFO L226 Difference]: Without dead ends: 971 [2019-10-13 23:02:04,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2019-10-13 23:02:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 963. [2019-10-13 23:02:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-10-13 23:02:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1446 transitions. [2019-10-13 23:02:04,534 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1446 transitions. Word has length 133 [2019-10-13 23:02:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:04,535 INFO L462 AbstractCegarLoop]: Abstraction has 963 states and 1446 transitions. [2019-10-13 23:02:04,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1446 transitions. [2019-10-13 23:02:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 23:02:04,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:04,541 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:04,541 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash 237582798, now seen corresponding path program 1 times [2019-10-13 23:02:04,542 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:04,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524934000] [2019-10-13 23:02:04,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:04,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:04,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:04,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524934000] [2019-10-13 23:02:04,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015979526] [2019-10-13 23:02:04,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:02:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:05,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:05,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:05,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:05,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:05,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 23:02:05,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868113100] [2019-10-13 23:02:05,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:05,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:05,626 INFO L87 Difference]: Start difference. First operand 963 states and 1446 transitions. Second operand 4 states. [2019-10-13 23:02:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:05,711 INFO L93 Difference]: Finished difference Result 1901 states and 2887 transitions. [2019-10-13 23:02:05,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:05,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 23:02:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:05,724 INFO L225 Difference]: With dead ends: 1901 [2019-10-13 23:02:05,725 INFO L226 Difference]: Without dead ends: 975 [2019-10-13 23:02:05,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2019-10-13 23:02:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 975. [2019-10-13 23:02:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-10-13 23:02:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1458 transitions. [2019-10-13 23:02:05,803 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1458 transitions. Word has length 137 [2019-10-13 23:02:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:05,804 INFO L462 AbstractCegarLoop]: Abstraction has 975 states and 1458 transitions. [2019-10-13 23:02:05,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1458 transitions. [2019-10-13 23:02:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 23:02:05,809 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:05,809 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:06,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:06,017 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1649777829, now seen corresponding path program 1 times [2019-10-13 23:02:06,019 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:06,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995844283] [2019-10-13 23:02:06,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:06,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995844283] [2019-10-13 23:02:06,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098158218] [2019-10-13 23:02:06,198 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 23:02:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:06,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:06,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 23:02:06,867 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:07,026 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:07,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-13 23:02:07,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979257787] [2019-10-13 23:02:07,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:07,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:07,028 INFO L87 Difference]: Start difference. First operand 975 states and 1458 transitions. Second operand 5 states. [2019-10-13 23:02:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:07,118 INFO L93 Difference]: Finished difference Result 1919 states and 2897 transitions. [2019-10-13 23:02:07,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:07,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-10-13 23:02:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:07,129 INFO L225 Difference]: With dead ends: 1919 [2019-10-13 23:02:07,130 INFO L226 Difference]: Without dead ends: 973 [2019-10-13 23:02:07,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-10-13 23:02:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2019-10-13 23:02:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-10-13 23:02:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1450 transitions. [2019-10-13 23:02:07,188 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1450 transitions. Word has length 139 [2019-10-13 23:02:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:07,193 INFO L462 AbstractCegarLoop]: Abstraction has 973 states and 1450 transitions. [2019-10-13 23:02:07,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1450 transitions. [2019-10-13 23:02:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 23:02:07,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:07,204 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:07,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:07,413 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash -787169402, now seen corresponding path program 1 times [2019-10-13 23:02:07,415 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:07,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287048877] [2019-10-13 23:02:07,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:07,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:07,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:07,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287048877] [2019-10-13 23:02:07,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613421685] [2019-10-13 23:02:07,601 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 23:02:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:08,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:08,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:08,281 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:08,488 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:08,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-10-13 23:02:08,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443686549] [2019-10-13 23:02:08,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:08,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:08,490 INFO L87 Difference]: Start difference. First operand 973 states and 1450 transitions. Second operand 5 states. [2019-10-13 23:02:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:09,804 INFO L93 Difference]: Finished difference Result 2353 states and 3570 transitions. [2019-10-13 23:02:09,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:09,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2019-10-13 23:02:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:09,820 INFO L225 Difference]: With dead ends: 2353 [2019-10-13 23:02:09,820 INFO L226 Difference]: Without dead ends: 1417 [2019-10-13 23:02:09,827 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:02:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2019-10-13 23:02:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1397. [2019-10-13 23:02:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1397 states. [2019-10-13 23:02:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 2056 transitions. [2019-10-13 23:02:09,893 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 2056 transitions. Word has length 140 [2019-10-13 23:02:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:09,894 INFO L462 AbstractCegarLoop]: Abstraction has 1397 states and 2056 transitions. [2019-10-13 23:02:09,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 2056 transitions. [2019-10-13 23:02:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:02:09,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:09,899 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:10,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:10,108 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1947274654, now seen corresponding path program 1 times [2019-10-13 23:02:10,108 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:10,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274459089] [2019-10-13 23:02:10,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:10,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:10,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:10,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274459089] [2019-10-13 23:02:10,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069216649] [2019-10-13 23:02:10,416 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 23:02:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:02:11,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:11,308 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:11,599 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:11,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2019-10-13 23:02:11,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107919461] [2019-10-13 23:02:11,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:11,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:11,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:02:11,601 INFO L87 Difference]: Start difference. First operand 1397 states and 2056 transitions. Second operand 7 states. [2019-10-13 23:02:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:13,058 INFO L93 Difference]: Finished difference Result 3022 states and 4460 transitions. [2019-10-13 23:02:13,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:02:13,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-13 23:02:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:13,075 INFO L225 Difference]: With dead ends: 3022 [2019-10-13 23:02:13,075 INFO L226 Difference]: Without dead ends: 1662 [2019-10-13 23:02:13,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-13 23:02:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1643. [2019-10-13 23:02:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2019-10-13 23:02:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2402 transitions. [2019-10-13 23:02:13,175 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2402 transitions. Word has length 141 [2019-10-13 23:02:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:13,176 INFO L462 AbstractCegarLoop]: Abstraction has 1643 states and 2402 transitions. [2019-10-13 23:02:13,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2402 transitions. [2019-10-13 23:02:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:02:13,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:13,180 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:13,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:13,396 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1280114856, now seen corresponding path program 1 times [2019-10-13 23:02:13,397 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:13,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561396831] [2019-10-13 23:02:13,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:13,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:13,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:13,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561396831] [2019-10-13 23:02:13,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430928456] [2019-10-13 23:02:13,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:14,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:14,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:14,247 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:14,389 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:14,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-10-13 23:02:14,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481141008] [2019-10-13 23:02:14,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:14,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:14,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:14,391 INFO L87 Difference]: Start difference. First operand 1643 states and 2402 transitions. Second operand 5 states. [2019-10-13 23:02:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:14,467 INFO L93 Difference]: Finished difference Result 3268 states and 4835 transitions. [2019-10-13 23:02:14,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:14,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-13 23:02:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:14,478 INFO L225 Difference]: With dead ends: 3268 [2019-10-13 23:02:14,478 INFO L226 Difference]: Without dead ends: 1675 [2019-10-13 23:02:14,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2019-10-13 23:02:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1655. [2019-10-13 23:02:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1655 states. [2019-10-13 23:02:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2414 transitions. [2019-10-13 23:02:14,566 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2414 transitions. Word has length 141 [2019-10-13 23:02:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:14,566 INFO L462 AbstractCegarLoop]: Abstraction has 1655 states and 2414 transitions. [2019-10-13 23:02:14,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2414 transitions. [2019-10-13 23:02:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 23:02:14,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:14,571 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:14,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:14,782 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:14,783 INFO L82 PathProgramCache]: Analyzing trace with hash 293521892, now seen corresponding path program 1 times [2019-10-13 23:02:14,783 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:14,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095726314] [2019-10-13 23:02:14,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:14,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:14,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:15,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095726314] [2019-10-13 23:02:15,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842876313] [2019-10-13 23:02:15,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:15,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:15,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:15,696 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:15,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:15,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 23:02:15,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656530058] [2019-10-13 23:02:15,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:15,842 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:15,842 INFO L87 Difference]: Start difference. First operand 1655 states and 2414 transitions. Second operand 4 states. [2019-10-13 23:02:16,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:16,299 INFO L93 Difference]: Finished difference Result 3334 states and 4951 transitions. [2019-10-13 23:02:16,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:16,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-10-13 23:02:16,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:16,313 INFO L225 Difference]: With dead ends: 3334 [2019-10-13 23:02:16,313 INFO L226 Difference]: Without dead ends: 1730 [2019-10-13 23:02:16,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2019-10-13 23:02:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1712. [2019-10-13 23:02:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2019-10-13 23:02:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2507 transitions. [2019-10-13 23:02:16,420 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2507 transitions. Word has length 143 [2019-10-13 23:02:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:16,421 INFO L462 AbstractCegarLoop]: Abstraction has 1712 states and 2507 transitions. [2019-10-13 23:02:16,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2507 transitions. [2019-10-13 23:02:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 23:02:16,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:16,426 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:16,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:16,635 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:16,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2100094758, now seen corresponding path program 1 times [2019-10-13 23:02:16,635 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:16,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415167588] [2019-10-13 23:02:16,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:16,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:16,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:16,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415167588] [2019-10-13 23:02:16,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715898716] [2019-10-13 23:02:16,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:17,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:17,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:17,542 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:17,720 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:17,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-13 23:02:17,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932580639] [2019-10-13 23:02:17,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:17,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:17,725 INFO L87 Difference]: Start difference. First operand 1712 states and 2507 transitions. Second operand 5 states. [2019-10-13 23:02:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:19,009 INFO L93 Difference]: Finished difference Result 4000 states and 6073 transitions. [2019-10-13 23:02:19,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:19,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-10-13 23:02:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:19,028 INFO L225 Difference]: With dead ends: 4000 [2019-10-13 23:02:19,028 INFO L226 Difference]: Without dead ends: 2805 [2019-10-13 23:02:19,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 287 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2019-10-13 23:02:19,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2740. [2019-10-13 23:02:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2740 states. [2019-10-13 23:02:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4111 transitions. [2019-10-13 23:02:19,200 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4111 transitions. Word has length 145 [2019-10-13 23:02:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:19,201 INFO L462 AbstractCegarLoop]: Abstraction has 2740 states and 4111 transitions. [2019-10-13 23:02:19,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4111 transitions. [2019-10-13 23:02:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 23:02:19,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:19,210 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:19,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:19,425 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -70432572, now seen corresponding path program 1 times [2019-10-13 23:02:19,425 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:19,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513946632] [2019-10-13 23:02:19,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:19,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:19,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:19,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513946632] [2019-10-13 23:02:19,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364057828] [2019-10-13 23:02:19,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:20,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:20,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:20,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:20,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:20,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2019-10-13 23:02:20,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849954803] [2019-10-13 23:02:20,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:20,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:20,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:20,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:20,421 INFO L87 Difference]: Start difference. First operand 2740 states and 4111 transitions. Second operand 4 states. [2019-10-13 23:02:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:20,543 INFO L93 Difference]: Finished difference Result 5418 states and 8304 transitions. [2019-10-13 23:02:20,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:20,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 23:02:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:20,561 INFO L225 Difference]: With dead ends: 5418 [2019-10-13 23:02:20,561 INFO L226 Difference]: Without dead ends: 2729 [2019-10-13 23:02:20,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2019-10-13 23:02:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2642. [2019-10-13 23:02:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-10-13 23:02:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 3929 transitions. [2019-10-13 23:02:20,696 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 3929 transitions. Word has length 145 [2019-10-13 23:02:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:20,697 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 3929 transitions. [2019-10-13 23:02:20,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 3929 transitions. [2019-10-13 23:02:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:02:20,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:20,702 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:20,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:20,911 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:20,911 INFO L82 PathProgramCache]: Analyzing trace with hash -389456864, now seen corresponding path program 1 times [2019-10-13 23:02:20,912 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:20,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985498510] [2019-10-13 23:02:20,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:20,912 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:20,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 23:02:21,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985498510] [2019-10-13 23:02:21,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799272088] [2019-10-13 23:02:21,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:21,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:21,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:21,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:21,955 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:21,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 7 [2019-10-13 23:02:21,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663630220] [2019-10-13 23:02:21,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:21,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:21,957 INFO L87 Difference]: Start difference. First operand 2642 states and 3929 transitions. Second operand 4 states. [2019-10-13 23:02:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:22,078 INFO L93 Difference]: Finished difference Result 5333 states and 8145 transitions. [2019-10-13 23:02:22,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:22,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-10-13 23:02:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:22,097 INFO L225 Difference]: With dead ends: 5333 [2019-10-13 23:02:22,098 INFO L226 Difference]: Without dead ends: 2742 [2019-10-13 23:02:22,112 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2019-10-13 23:02:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2689. [2019-10-13 23:02:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2689 states. [2019-10-13 23:02:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 4000 transitions. [2019-10-13 23:02:22,333 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 4000 transitions. Word has length 148 [2019-10-13 23:02:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:22,333 INFO L462 AbstractCegarLoop]: Abstraction has 2689 states and 4000 transitions. [2019-10-13 23:02:22,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 4000 transitions. [2019-10-13 23:02:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:02:22,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:22,339 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:02:22,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:22,549 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:22,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1648270878, now seen corresponding path program 1 times [2019-10-13 23:02:22,549 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:22,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199955399] [2019-10-13 23:02:22,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:22,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:22,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:22,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199955399] [2019-10-13 23:02:22,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643985596] [2019-10-13 23:02:22,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:23,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:23,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:23,391 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:23,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:23,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 23:02:23,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421855261] [2019-10-13 23:02:23,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:23,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:23,568 INFO L87 Difference]: Start difference. First operand 2689 states and 4000 transitions. Second operand 5 states. [2019-10-13 23:02:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:24,859 INFO L93 Difference]: Finished difference Result 5995 states and 9231 transitions. [2019-10-13 23:02:24,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:24,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-10-13 23:02:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:24,886 INFO L225 Difference]: With dead ends: 5995 [2019-10-13 23:02:24,886 INFO L226 Difference]: Without dead ends: 3873 [2019-10-13 23:02:24,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2019-10-13 23:02:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3823. [2019-10-13 23:02:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3823 states. [2019-10-13 23:02:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 5823 transitions. [2019-10-13 23:02:25,077 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 5823 transitions. Word has length 154 [2019-10-13 23:02:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:25,078 INFO L462 AbstractCegarLoop]: Abstraction has 3823 states and 5823 transitions. [2019-10-13 23:02:25,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 5823 transitions. [2019-10-13 23:02:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 23:02:25,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:25,085 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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]