java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 14:26:36,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 14:26:36,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 14:26:36,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 14:26:36,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 14:26:36,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 14:26:36,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 14:26:36,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 14:26:36,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 14:26:36,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 14:26:36,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 14:26:36,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 14:26:36,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 14:26:36,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 14:26:36,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 14:26:36,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 14:26:36,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 14:26:36,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 14:26:36,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 14:26:36,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 14:26:36,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 14:26:36,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 14:26:36,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 14:26:36,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 14:26:36,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 14:26:36,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 14:26:36,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 14:26:36,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 14:26:36,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 14:26:36,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 14:26:36,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 14:26:36,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 14:26:36,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 14:26:36,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 14:26:36,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 14:26:36,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 14:26:36,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 14:26:36,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 14:26:36,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 14:26:36,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 14:26:36,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 14:26:36,888 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 [2019-10-07 14:26:36,902 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 14:26:36,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 14:26:36,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 14:26:36,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 14:26:36,904 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 14:26:36,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 14:26:36,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 14:26:36,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 14:26:36,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 14:26:36,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 14:26:36,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 14:26:36,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 14:26:36,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 14:26:36,906 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 14:26:36,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 14:26:36,906 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 14:26:36,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 14:26:36,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 14:26:36,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 14:26:36,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 14:26:36,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 14:26:36,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:26:36,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 14:26:36,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 14:26:36,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 14:26:36,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 14:26:36,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 14:26:36,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 14:26:36,909 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 [2019-10-07 14:26:37,207 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 14:26:37,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 14:26:37,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 14:26:37,225 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 14:26:37,226 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 14:26:37,226 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product22.cil.c [2019-10-07 14:26:37,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a38aec6f/c4ba97d08de24611bc733468a098565d/FLAG6cb6e0b52 [2019-10-07 14:26:37,925 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 14:26:37,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product22.cil.c [2019-10-07 14:26:37,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a38aec6f/c4ba97d08de24611bc733468a098565d/FLAG6cb6e0b52 [2019-10-07 14:26:38,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a38aec6f/c4ba97d08de24611bc733468a098565d [2019-10-07 14:26:38,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 14:26:38,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 14:26:38,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 14:26:38,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 14:26:38,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 14:26:38,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:26:38" (1/1) ... [2019-10-07 14:26:38,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579f5dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:38, skipping insertion in model container [2019-10-07 14:26:38,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:26:38" (1/1) ... [2019-10-07 14:26:38,306 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 14:26:38,393 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 14:26:39,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:26:39,117 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 14:26:39,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:26:39,316 INFO L192 MainTranslator]: Completed translation [2019-10-07 14:26:39,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39 WrapperNode [2019-10-07 14:26:39,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 14:26:39,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 14:26:39,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 14:26:39,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 14:26:39,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (1/1) ... [2019-10-07 14:26:39,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 14:26:39,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 14:26:39,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 14:26:39,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 14:26:39,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (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 [2019-10-07 14:26:39,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 14:26:39,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 14:26:39,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-07 14:26:39,629 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-07 14:26:39,629 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-07 14:26:39,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-07 14:26:39,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-07 14:26:39,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-07 14:26:39,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-07 14:26:39,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-07 14:26:39,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-07 14:26:39,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-07 14:26:39,631 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-07 14:26:39,631 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-07 14:26:39,631 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-07 14:26:39,632 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-07 14:26:39,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-07 14:26:39,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-07 14:26:39,632 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-07 14:26:39,633 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-07 14:26:39,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-07 14:26:39,634 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-07 14:26:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-07 14:26:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-07 14:26:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-07 14:26:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-07 14:26:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-07 14:26:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-07 14:26:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-07 14:26:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-07 14:26:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-07 14:26:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-07 14:26:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-07 14:26:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-07 14:26:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 14:26:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-07 14:26:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-07 14:26:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-07 14:26:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-07 14:26:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-07 14:26:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-07 14:26:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-07 14:26:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-07 14:26:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-07 14:26:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-07 14:26:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-07 14:26:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-07 14:26:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-07 14:26:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-07 14:26:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-07 14:26:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-07 14:26:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-07 14:26:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-07 14:26:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-07 14:26:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-07 14:26:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-07 14:26:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-07 14:26:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-07 14:26:39,642 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-07 14:26:39,643 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-07 14:26:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-07 14:26:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-07 14:26:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-07 14:26:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-07 14:26:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-07 14:26:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-07 14:26:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-07 14:26:39,645 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-07 14:26:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-07 14:26:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-07 14:26:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-07 14:26:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-07 14:26:39,647 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-07 14:26:39,647 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-07 14:26:39,648 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-07 14:26:39,648 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-07 14:26:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 14:26:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 14:26:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-07 14:26:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-07 14:26:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-07 14:26:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-07 14:26:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-07 14:26:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-07 14:26:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-07 14:26:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-07 14:26:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-07 14:26:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-07 14:26:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-07 14:26:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 14:26:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 14:26:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-07 14:26:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 14:26:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 14:26:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 14:26:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 14:26:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-07 14:26:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 14:26:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-07 14:26:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-07 14:26:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 14:26:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-07 14:26:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-07 14:26:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 14:26:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-07 14:26:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-07 14:26:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-07 14:26:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-07 14:26:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-07 14:26:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-07 14:26:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-07 14:26:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-07 14:26:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-07 14:26:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-07 14:26:39,659 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 14:26:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-07 14:26:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-07 14:26:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-07 14:26:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-07 14:26:39,660 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-07 14:26:39,661 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-07 14:26:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-07 14:26:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-07 14:26:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-07 14:26:39,666 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-07 14:26:39,666 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-07 14:26:39,666 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-07 14:26:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-07 14:26:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-07 14:26:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-07 14:26:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-07 14:26:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-07 14:26:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-07 14:26:39,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 14:26:39,673 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-07 14:26:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-07 14:26:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-07 14:26:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-07 14:26:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-07 14:26:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-07 14:26:39,675 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-07 14:26:39,675 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-07 14:26:39,675 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-07 14:26:39,675 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-07 14:26:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-07 14:26:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-07 14:26:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-07 14:26:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-07 14:26:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-07 14:26:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-07 14:26:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-07 14:26:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-07 14:26:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-07 14:26:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 14:26:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 14:26:44,948 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 14:26:44,949 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 14:26:44,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:26:44 BoogieIcfgContainer [2019-10-07 14:26:44,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 14:26:44,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 14:26:44,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 14:26:44,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 14:26:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:26:38" (1/3) ... [2019-10-07 14:26:44,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9af42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:26:44, skipping insertion in model container [2019-10-07 14:26:44,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:26:39" (2/3) ... [2019-10-07 14:26:44,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9af42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:26:44, skipping insertion in model container [2019-10-07 14:26:44,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:26:44" (3/3) ... [2019-10-07 14:26:44,960 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2019-10-07 14:26:44,970 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 14:26:44,980 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 14:26:44,991 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 14:26:45,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 14:26:45,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 14:26:45,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 14:26:45,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 14:26:45,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 14:26:45,025 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 14:26:45,025 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 14:26:45,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 14:26:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states. [2019-10-07 14:26:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 14:26:45,070 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:45,071 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:45,073 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1873355243, now seen corresponding path program 1 times [2019-10-07 14:26:45,088 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:45,089 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:45,089 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:45,089 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:26:45,945 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:45,946 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:45,946 INFO L95 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 [2019-10-07 14:26:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:46,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 14:26:46,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:26:46,769 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:46,897 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:46,897 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 13 [2019-10-07 14:26:46,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:26:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:26:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:26:46,919 INFO L87 Difference]: Start difference. First operand 608 states. Second operand 4 states. [2019-10-07 14:26:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:48,481 INFO L93 Difference]: Finished difference Result 1724 states and 2647 transitions. [2019-10-07 14:26:48,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 14:26:48,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2019-10-07 14:26:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:48,520 INFO L225 Difference]: With dead ends: 1724 [2019-10-07 14:26:48,520 INFO L226 Difference]: Without dead ends: 1244 [2019-10-07 14:26:48,536 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:26:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2019-10-07 14:26:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1203. [2019-10-07 14:26:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-10-07 14:26:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1823 transitions. [2019-10-07 14:26:48,749 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1823 transitions. Word has length 81 [2019-10-07 14:26:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:48,752 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1823 transitions. [2019-10-07 14:26:48,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:26:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1823 transitions. [2019-10-07 14:26:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 14:26:48,769 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:48,770 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:48,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:48,973 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash -553101953, now seen corresponding path program 1 times [2019-10-07 14:26:48,975 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:48,975 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:48,975 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:48,976 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:26:49,367 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:49,368 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:26:49,368 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-07 14:26:49,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 14:26:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 14:26:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:26:49,371 INFO L87 Difference]: Start difference. First operand 1203 states and 1823 transitions. Second operand 10 states. [2019-10-07 14:26:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:50,491 INFO L93 Difference]: Finished difference Result 2380 states and 3639 transitions. [2019-10-07 14:26:50,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-07 14:26:50,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2019-10-07 14:26:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:50,511 INFO L225 Difference]: With dead ends: 2380 [2019-10-07 14:26:50,512 INFO L226 Difference]: Without dead ends: 2377 [2019-10-07 14:26:50,514 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:26:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2019-10-07 14:26:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2336. [2019-10-07 14:26:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2336 states. [2019-10-07 14:26:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3587 transitions. [2019-10-07 14:26:50,639 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3587 transitions. Word has length 81 [2019-10-07 14:26:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:50,640 INFO L462 AbstractCegarLoop]: Abstraction has 2336 states and 3587 transitions. [2019-10-07 14:26:50,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 14:26:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3587 transitions. [2019-10-07 14:26:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-07 14:26:50,642 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:50,642 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:50,643 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1465743899, now seen corresponding path program 1 times [2019-10-07 14:26:50,643 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:50,643 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:50,644 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:50,644 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:50,807 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:50,807 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:26:50,807 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:26:50,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:26:50,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:26:50,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:26:50,809 INFO L87 Difference]: Start difference. First operand 2336 states and 3587 transitions. Second operand 3 states. [2019-10-07 14:26:51,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:51,035 INFO L93 Difference]: Finished difference Result 5389 states and 8389 transitions. [2019-10-07 14:26:51,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:26:51,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2019-10-07 14:26:51,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:51,060 INFO L225 Difference]: With dead ends: 5389 [2019-10-07 14:26:51,060 INFO L226 Difference]: Without dead ends: 3084 [2019-10-07 14:26:51,075 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:26:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2019-10-07 14:26:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3026. [2019-10-07 14:26:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3026 states. [2019-10-07 14:26:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4663 transitions. [2019-10-07 14:26:51,278 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4663 transitions. Word has length 82 [2019-10-07 14:26:51,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:51,278 INFO L462 AbstractCegarLoop]: Abstraction has 3026 states and 4663 transitions. [2019-10-07 14:26:51,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:26:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4663 transitions. [2019-10-07 14:26:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 14:26:51,282 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:51,283 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:51,283 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1504598561, now seen corresponding path program 1 times [2019-10-07 14:26:51,284 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:51,284 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:51,284 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:51,284 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:26:51,580 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:51,580 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:51,580 INFO L95 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 [2019-10-07 14:26:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:52,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 14:26:52,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:26:52,269 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:52,353 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:52,353 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-07 14:26:52,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:26:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:26:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:52,354 INFO L87 Difference]: Start difference. First operand 3026 states and 4663 transitions. Second operand 3 states. [2019-10-07 14:26:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:52,552 INFO L93 Difference]: Finished difference Result 6798 states and 10552 transitions. [2019-10-07 14:26:52,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:26:52,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-10-07 14:26:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:52,583 INFO L225 Difference]: With dead ends: 6798 [2019-10-07 14:26:52,583 INFO L226 Difference]: Without dead ends: 3803 [2019-10-07 14:26:52,601 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:26:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2019-10-07 14:26:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 3026. [2019-10-07 14:26:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3026 states. [2019-10-07 14:26:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 4655 transitions. [2019-10-07 14:26:52,950 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 4655 transitions. Word has length 81 [2019-10-07 14:26:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:52,951 INFO L462 AbstractCegarLoop]: Abstraction has 3026 states and 4655 transitions. [2019-10-07 14:26:52,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:26:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 4655 transitions. [2019-10-07 14:26:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-07 14:26:52,953 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:52,953 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:53,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:53,162 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash -623494353, now seen corresponding path program 1 times [2019-10-07 14:26:53,163 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:53,163 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:53,164 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:53,164 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:26:53,400 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:53,400 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:53,400 INFO L95 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 [2019-10-07 14:26:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:53,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 14:26:53,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:26:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:26:54,106 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:26:54,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:26:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:26:54,399 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:26:54,399 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [11] total 20 [2019-10-07 14:26:54,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-07 14:26:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-07 14:26:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-07 14:26:54,401 INFO L87 Difference]: Start difference. First operand 3026 states and 4655 transitions. Second operand 11 states. [2019-10-07 14:26:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:26:58,467 INFO L93 Difference]: Finished difference Result 8521 states and 13304 transitions. [2019-10-07 14:26:58,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-07 14:26:58,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2019-10-07 14:26:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:26:58,510 INFO L225 Difference]: With dead ends: 8521 [2019-10-07 14:26:58,510 INFO L226 Difference]: Without dead ends: 5526 [2019-10-07 14:26:58,531 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2019-10-07 14:26:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2019-10-07 14:26:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 5502. [2019-10-07 14:26:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5502 states. [2019-10-07 14:26:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 8244 transitions. [2019-10-07 14:26:58,812 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 8244 transitions. Word has length 82 [2019-10-07 14:26:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:26:58,816 INFO L462 AbstractCegarLoop]: Abstraction has 5502 states and 8244 transitions. [2019-10-07 14:26:58,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-07 14:26:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 8244 transitions. [2019-10-07 14:26:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-07 14:26:58,825 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:26:58,825 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:26:59,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:26:59,035 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:26:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:26:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1818950447, now seen corresponding path program 1 times [2019-10-07 14:26:59,036 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:26:59,036 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:59,036 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:59,036 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:26:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:26:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:26:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:26:59,292 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:26:59,293 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:26:59,294 INFO L95 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 [2019-10-07 14:27:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:00,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-07 14:27:00,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:27:00,177 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:00,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:00,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 14:27:00,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:00,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 14:27:00,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:27:00,857 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:00,857 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-07 14:27:00,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 14:27:00,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 14:27:00,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2019-10-07 14:27:00,860 INFO L87 Difference]: Start difference. First operand 5502 states and 8244 transitions. Second operand 9 states. [2019-10-07 14:27:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:05,209 INFO L93 Difference]: Finished difference Result 10815 states and 16519 transitions. [2019-10-07 14:27:05,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 14:27:05,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2019-10-07 14:27:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:05,269 INFO L225 Difference]: With dead ends: 10815 [2019-10-07 14:27:05,269 INFO L226 Difference]: Without dead ends: 6124 [2019-10-07 14:27:05,304 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2019-10-07 14:27:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2019-10-07 14:27:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5735. [2019-10-07 14:27:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5735 states. [2019-10-07 14:27:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5735 states to 5735 states and 8705 transitions. [2019-10-07 14:27:05,676 INFO L78 Accepts]: Start accepts. Automaton has 5735 states and 8705 transitions. Word has length 128 [2019-10-07 14:27:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:05,677 INFO L462 AbstractCegarLoop]: Abstraction has 5735 states and 8705 transitions. [2019-10-07 14:27:05,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 14:27:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5735 states and 8705 transitions. [2019-10-07 14:27:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-07 14:27:05,683 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:05,684 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 14:27:05,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:05,892 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1467976375, now seen corresponding path program 1 times [2019-10-07 14:27:05,893 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:05,893 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:05,893 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:05,893 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 14:27:06,218 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:06,219 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:06,219 INFO L95 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 [2019-10-07 14:27:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:07,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 3841 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-07 14:27:07,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-07 14:27:07,258 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:07,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 14:27:07,992 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:07,992 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 9] total 25 [2019-10-07 14:27:07,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 14:27:07,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 14:27:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2019-10-07 14:27:07,994 INFO L87 Difference]: Start difference. First operand 5735 states and 8705 transitions. Second operand 9 states. [2019-10-07 14:27:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:16,264 INFO L93 Difference]: Finished difference Result 14362 states and 21951 transitions. [2019-10-07 14:27:16,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 14:27:16,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 196 [2019-10-07 14:27:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:16,335 INFO L225 Difference]: With dead ends: 14362 [2019-10-07 14:27:16,335 INFO L226 Difference]: Without dead ends: 8658 [2019-10-07 14:27:16,368 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 380 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2019-10-07 14:27:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8658 states. [2019-10-07 14:27:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8658 to 8420. [2019-10-07 14:27:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8420 states. [2019-10-07 14:27:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8420 states to 8420 states and 12871 transitions. [2019-10-07 14:27:16,833 INFO L78 Accepts]: Start accepts. Automaton has 8420 states and 12871 transitions. Word has length 196 [2019-10-07 14:27:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:16,835 INFO L462 AbstractCegarLoop]: Abstraction has 8420 states and 12871 transitions. [2019-10-07 14:27:16,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 14:27:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8420 states and 12871 transitions. [2019-10-07 14:27:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-07 14:27:16,841 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:16,841 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:17,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:17,059 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:17,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1966994329, now seen corresponding path program 1 times [2019-10-07 14:27:17,060 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:17,060 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:17,060 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:17,060 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:27:17,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:17,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:17,256 INFO L95 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 [2019-10-07 14:27:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:18,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 3279 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 14:27:18,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:27:18,105 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:18,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:27:18,445 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:27:18,447 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 13 [2019-10-07 14:27:18,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 14:27:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 14:27:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:27:18,449 INFO L87 Difference]: Start difference. First operand 8420 states and 12871 transitions. Second operand 8 states. [2019-10-07 14:27:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:19,089 INFO L93 Difference]: Finished difference Result 17795 states and 27740 transitions. [2019-10-07 14:27:19,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:27:19,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2019-10-07 14:27:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:19,158 INFO L225 Difference]: With dead ends: 17795 [2019-10-07 14:27:19,158 INFO L226 Difference]: Without dead ends: 10037 [2019-10-07 14:27:19,188 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:27:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10037 states. [2019-10-07 14:27:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10037 to 10037. [2019-10-07 14:27:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10037 states. [2019-10-07 14:27:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 15350 transitions. [2019-10-07 14:27:19,691 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 15350 transitions. Word has length 128 [2019-10-07 14:27:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:19,692 INFO L462 AbstractCegarLoop]: Abstraction has 10037 states and 15350 transitions. [2019-10-07 14:27:19,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 14:27:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 15350 transitions. [2019-10-07 14:27:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-07 14:27:19,698 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:19,698 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:19,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:19,909 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash -939688407, now seen corresponding path program 1 times [2019-10-07 14:27:19,911 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:19,911 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:19,911 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:19,912 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-07 14:27:20,962 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:20,962 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:20,962 INFO L95 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 [2019-10-07 14:27:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:21,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 3904 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-07 14:27:22,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-07 14:27:22,176 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:22,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:22,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-07 14:27:22,471 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:22,472 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 5] total 17 [2019-10-07 14:27:22,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:27:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:27:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-10-07 14:27:22,474 INFO L87 Difference]: Start difference. First operand 10037 states and 15350 transitions. Second operand 7 states. [2019-10-07 14:27:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:29,323 INFO L93 Difference]: Finished difference Result 41835 states and 65074 transitions. [2019-10-07 14:27:29,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 14:27:29,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2019-10-07 14:27:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:29,586 INFO L225 Difference]: With dead ends: 41835 [2019-10-07 14:27:29,586 INFO L226 Difference]: Without dead ends: 31831 [2019-10-07 14:27:29,645 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-10-07 14:27:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31831 states. [2019-10-07 14:27:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31831 to 29100. [2019-10-07 14:27:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29100 states. [2019-10-07 14:27:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29100 states to 29100 states and 45116 transitions. [2019-10-07 14:27:31,235 INFO L78 Accepts]: Start accepts. Automaton has 29100 states and 45116 transitions. Word has length 211 [2019-10-07 14:27:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:31,236 INFO L462 AbstractCegarLoop]: Abstraction has 29100 states and 45116 transitions. [2019-10-07 14:27:31,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:27:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 29100 states and 45116 transitions. [2019-10-07 14:27:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-07 14:27:31,241 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:31,242 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:31,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:31,451 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:31,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1409505795, now seen corresponding path program 1 times [2019-10-07 14:27:31,452 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:31,453 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:31,453 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:31,453 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:27:31,631 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:31,631 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:31,632 INFO L95 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 [2019-10-07 14:27:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:32,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-07 14:27:32,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:32,487 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-10-07 14:27:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:27:32,528 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:33,006 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:33,474 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:33,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:33,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:33,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:33,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:33,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 14:27:33,565 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:33,565 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2019-10-07 14:27:33,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:27:33,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:27:33,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:27:33,566 INFO L87 Difference]: Start difference. First operand 29100 states and 45116 transitions. Second operand 6 states. [2019-10-07 14:27:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:38,276 INFO L93 Difference]: Finished difference Result 77117 states and 122500 transitions. [2019-10-07 14:27:38,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:27:38,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-10-07 14:27:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:38,547 INFO L225 Difference]: With dead ends: 77117 [2019-10-07 14:27:38,547 INFO L226 Difference]: Without dead ends: 48048 [2019-10-07 14:27:38,662 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:27:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48048 states. [2019-10-07 14:27:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48048 to 47591. [2019-10-07 14:27:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47591 states. [2019-10-07 14:27:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47591 states to 47591 states and 74798 transitions. [2019-10-07 14:27:41,082 INFO L78 Accepts]: Start accepts. Automaton has 47591 states and 74798 transitions. Word has length 131 [2019-10-07 14:27:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:41,083 INFO L462 AbstractCegarLoop]: Abstraction has 47591 states and 74798 transitions. [2019-10-07 14:27:41,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:27:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 47591 states and 74798 transitions. [2019-10-07 14:27:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-07 14:27:41,089 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:41,089 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:41,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:27:41,290 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash 898200747, now seen corresponding path program 1 times [2019-10-07 14:27:41,291 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:41,291 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:41,292 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:41,292 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 14:27:41,468 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:41,468 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:27:41,468 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-07 14:27:41,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 14:27:41,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 14:27:41,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:27:41,469 INFO L87 Difference]: Start difference. First operand 47591 states and 74798 transitions. Second operand 10 states. [2019-10-07 14:27:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:44,668 INFO L93 Difference]: Finished difference Result 98657 states and 156082 transitions. [2019-10-07 14:27:44,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-07 14:27:44,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2019-10-07 14:27:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:44,967 INFO L225 Difference]: With dead ends: 98657 [2019-10-07 14:27:44,968 INFO L226 Difference]: Without dead ends: 50697 [2019-10-07 14:27:45,099 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:27:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50697 states. [2019-10-07 14:27:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50697 to 49248. [2019-10-07 14:27:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49248 states. [2019-10-07 14:27:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49248 states to 49248 states and 76768 transitions. [2019-10-07 14:27:49,121 INFO L78 Accepts]: Start accepts. Automaton has 49248 states and 76768 transitions. Word has length 135 [2019-10-07 14:27:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:27:49,122 INFO L462 AbstractCegarLoop]: Abstraction has 49248 states and 76768 transitions. [2019-10-07 14:27:49,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 14:27:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 49248 states and 76768 transitions. [2019-10-07 14:27:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-07 14:27:49,127 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:27:49,128 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:27:49,128 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:27:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:27:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash -858657211, now seen corresponding path program 1 times [2019-10-07 14:27:49,129 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:27:49,129 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:49,129 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:49,129 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:27:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:27:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-07 14:27:49,613 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:27:49,613 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:27:49,613 INFO L95 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 [2019-10-07 14:27:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:27:50,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 3305 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-07 14:27:50,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:27:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:27:50,531 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:27:50,963 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:51,428 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:27:51,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:51,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:51,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:51,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:51,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:27:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-07 14:27:51,554 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:27:51,554 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 16 [2019-10-07 14:27:51,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:27:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:27:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:27:51,556 INFO L87 Difference]: Start difference. First operand 49248 states and 76768 transitions. Second operand 6 states. [2019-10-07 14:27:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:27:57,226 INFO L93 Difference]: Finished difference Result 136282 states and 220556 transitions. [2019-10-07 14:27:57,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:27:57,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-07 14:27:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:27:57,717 INFO L225 Difference]: With dead ends: 136282 [2019-10-07 14:27:57,718 INFO L226 Difference]: Without dead ends: 87065 [2019-10-07 14:27:58,198 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:27:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87065 states. [2019-10-07 14:28:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87065 to 85833. [2019-10-07 14:28:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85833 states. [2019-10-07 14:28:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85833 states to 85833 states and 136609 transitions. [2019-10-07 14:28:03,873 INFO L78 Accepts]: Start accepts. Automaton has 85833 states and 136609 transitions. Word has length 136 [2019-10-07 14:28:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:03,874 INFO L462 AbstractCegarLoop]: Abstraction has 85833 states and 136609 transitions. [2019-10-07 14:28:03,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:28:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 85833 states and 136609 transitions. [2019-10-07 14:28:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-07 14:28:03,879 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:03,880 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:04,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:28:04,088 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1566962169, now seen corresponding path program 1 times [2019-10-07 14:28:04,088 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:04,089 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:04,089 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:04,089 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 14:28:04,397 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:04,397 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:04,397 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2019-10-07 14:28:04,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-07 14:28:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-07 14:28:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:28:04,399 INFO L87 Difference]: Start difference. First operand 85833 states and 136609 transitions. Second operand 16 states. [2019-10-07 14:28:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:33,492 INFO L93 Difference]: Finished difference Result 373536 states and 657623 transitions. [2019-10-07 14:28:33,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-07 14:28:33,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 143 [2019-10-07 14:28:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:35,054 INFO L225 Difference]: With dead ends: 373536 [2019-10-07 14:28:35,055 INFO L226 Difference]: Without dead ends: 292876 [2019-10-07 14:28:35,517 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2019-10-07 14:28:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292876 states. [2019-10-07 14:28:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292876 to 282137. [2019-10-07 14:28:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282137 states. [2019-10-07 14:28:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282137 states to 282137 states and 481580 transitions. [2019-10-07 14:28:56,780 INFO L78 Accepts]: Start accepts. Automaton has 282137 states and 481580 transitions. Word has length 143 [2019-10-07 14:28:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:56,781 INFO L462 AbstractCegarLoop]: Abstraction has 282137 states and 481580 transitions. [2019-10-07 14:28:56,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-07 14:28:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 282137 states and 481580 transitions. [2019-10-07 14:28:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 14:28:56,790 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:56,791 INFO L385 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:56,791 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1034448889, now seen corresponding path program 1 times [2019-10-07 14:28:56,792 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:56,792 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:56,792 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:56,792 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-07 14:28:57,004 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:57,004 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:28:57,004 INFO L95 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 [2019-10-07 14:28:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:57,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 3454 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 14:28:57,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:28:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 14:28:57,864 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:28:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-07 14:28:58,265 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:28:58,265 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 15 [2019-10-07 14:28:58,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:28:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:28:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:28:58,266 INFO L87 Difference]: Start difference. First operand 282137 states and 481580 transitions. Second operand 7 states. [2019-10-07 14:29:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:29:19,608 INFO L93 Difference]: Finished difference Result 570078 states and 1033013 transitions. [2019-10-07 14:29:19,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:29:19,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2019-10-07 14:29:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:29:21,214 INFO L225 Difference]: With dead ends: 570078 [2019-10-07 14:29:21,214 INFO L226 Difference]: Without dead ends: 290894 [2019-10-07 14:29:23,652 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 347 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:29:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290894 states. [2019-10-07 14:29:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290894 to 287432. [2019-10-07 14:29:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287432 states. [2019-10-07 14:29:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287432 states to 287432 states and 509870 transitions. [2019-10-07 14:29:57,156 INFO L78 Accepts]: Start accepts. Automaton has 287432 states and 509870 transitions. Word has length 177 [2019-10-07 14:29:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:29:57,157 INFO L462 AbstractCegarLoop]: Abstraction has 287432 states and 509870 transitions. [2019-10-07 14:29:57,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:29:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 287432 states and 509870 transitions. [2019-10-07 14:29:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-07 14:29:57,162 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:29:57,162 INFO L385 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:29:57,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:57,363 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:29:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:29:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash -314709350, now seen corresponding path program 1 times [2019-10-07 14:29:57,364 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:29:57,365 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:57,365 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:57,365 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:29:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 14:29:57,572 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:57,572 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:29:57,572 INFO L95 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 [2019-10-07 14:29:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:58,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 3453 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 14:29:58,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:29:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 14:29:58,486 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:29:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 14:29:58,891 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:29:58,891 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 15 [2019-10-07 14:29:58,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:29:58,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:29:58,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:29:58,892 INFO L87 Difference]: Start difference. First operand 287432 states and 509870 transitions. Second operand 7 states. [2019-10-07 14:30:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:30:24,358 INFO L93 Difference]: Finished difference Result 578874 states and 1076048 transitions. [2019-10-07 14:30:24,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:30:24,359 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2019-10-07 14:30:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:30:26,297 INFO L225 Difference]: With dead ends: 578874 [2019-10-07 14:30:26,297 INFO L226 Difference]: Without dead ends: 294395 [2019-10-07 14:30:28,473 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 345 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-10-07 14:30:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294395 states. [2019-10-07 14:30:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294395 to 288167. [2019-10-07 14:30:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288167 states. [2019-10-07 14:31:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288167 states to 288167 states and 510083 transitions. [2019-10-07 14:31:00,547 INFO L78 Accepts]: Start accepts. Automaton has 288167 states and 510083 transitions. Word has length 176 [2019-10-07 14:31:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:31:00,548 INFO L462 AbstractCegarLoop]: Abstraction has 288167 states and 510083 transitions. [2019-10-07 14:31:00,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:31:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 288167 states and 510083 transitions. [2019-10-07 14:31:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-07 14:31:00,553 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:31:00,554 INFO L385 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:31:00,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:31:00,758 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:31:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:31:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash -431471479, now seen corresponding path program 1 times [2019-10-07 14:31:00,759 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:31:00,759 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:31:00,760 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:31:00,760 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:31:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:31:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:31:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 14:31:00,898 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:31:00,898 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:31:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:31:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:31:01,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 3453 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 14:31:01,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:31:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 14:31:01,829 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:31:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-07 14:31:02,184 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:31:02,184 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 9 [2019-10-07 14:31:02,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:31:02,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:31:02,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:31:02,185 INFO L87 Difference]: Start difference. First operand 288167 states and 510083 transitions. Second operand 7 states. [2019-10-07 14:31:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:31:26,140 INFO L93 Difference]: Finished difference Result 580344 states and 1076474 transitions. [2019-10-07 14:31:26,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:31:26,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 177 [2019-10-07 14:31:26,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:31:28,027 INFO L225 Difference]: With dead ends: 580344 [2019-10-07 14:31:28,027 INFO L226 Difference]: Without dead ends: 295130 [2019-10-07 14:31:30,425 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 345 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:31:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295130 states. [2019-10-07 14:32:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295130 to 290696. [2019-10-07 14:32:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290696 states. [2019-10-07 14:32:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290696 states to 290696 states and 517793 transitions. [2019-10-07 14:32:10,945 INFO L78 Accepts]: Start accepts. Automaton has 290696 states and 517793 transitions. Word has length 177 [2019-10-07 14:32:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:32:10,946 INFO L462 AbstractCegarLoop]: Abstraction has 290696 states and 517793 transitions. [2019-10-07 14:32:10,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:32:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 290696 states and 517793 transitions. [2019-10-07 14:32:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-07 14:32:10,952 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:32:10,952 INFO L385 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:32:11,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:32:11,154 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:32:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:32:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash 207918511, now seen corresponding path program 1 times [2019-10-07 14:32:11,155 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:32:11,155 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:32:11,156 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:32:11,156 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:32:11,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:32:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:32:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-07 14:32:11,344 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:32:11,344 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:32:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:32:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:32:12,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 3459 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 14:32:12,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:32:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 14:32:12,290 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:32:12,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-07 14:32:12,632 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:32:12,632 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 16 [2019-10-07 14:32:12,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:32:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:32:12,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:32:12,634 INFO L87 Difference]: Start difference. First operand 290696 states and 517793 transitions. Second operand 6 states. [2019-10-07 14:32:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:32:42,083 INFO L93 Difference]: Finished difference Result 624025 states and 1177447 transitions. [2019-10-07 14:32:42,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:32:42,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 188 [2019-10-07 14:32:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:32:44,712 INFO L225 Difference]: With dead ends: 624025 [2019-10-07 14:32:44,712 INFO L226 Difference]: Without dead ends: 271128 [2019-10-07 14:32:47,299 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 369 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-07 14:32:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271128 states. [2019-10-07 14:33:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271128 to 270735. [2019-10-07 14:33:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270735 states. [2019-10-07 14:33:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270735 states to 270735 states and 471787 transitions. [2019-10-07 14:33:17,443 INFO L78 Accepts]: Start accepts. Automaton has 270735 states and 471787 transitions. Word has length 188 [2019-10-07 14:33:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:33:17,443 INFO L462 AbstractCegarLoop]: Abstraction has 270735 states and 471787 transitions. [2019-10-07 14:33:17,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:33:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 270735 states and 471787 transitions. [2019-10-07 14:33:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-07 14:33:17,450 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:33:17,450 INFO L385 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:33:17,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:33:17,651 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:33:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:33:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1065971267, now seen corresponding path program 1 times [2019-10-07 14:33:17,652 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:33:17,652 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:33:17,653 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:33:17,653 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:33:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:33:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:33:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 14:33:17,894 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:33:17,894 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:33:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:33:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:33:18,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 3462 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-07 14:33:18,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:33:18,979 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:33:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 14:33:19,042 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:33:19,562 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:20,055 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:33:20,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:20,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:20,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:20,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:20,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:33:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 14:33:21,399 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:33:21,399 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 7] total 20 [2019-10-07 14:33:21,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:33:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:33:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2019-10-07 14:33:21,402 INFO L87 Difference]: Start difference. First operand 270735 states and 471787 transitions. Second operand 6 states. [2019-10-07 14:33:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:33:58,686 INFO L93 Difference]: Finished difference Result 772427 states and 1467097 transitions. [2019-10-07 14:33:58,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:33:58,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 195 [2019-10-07 14:33:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:34:03,166 INFO L225 Difference]: With dead ends: 772427 [2019-10-07 14:34:03,167 INFO L226 Difference]: Without dead ends: 501612 [2019-10-07 14:34:18,610 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 384 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2019-10-07 14:34:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501612 states. [2019-10-07 14:35:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501612 to 496640. [2019-10-07 14:35:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496640 states. [2019-10-07 14:35:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496640 states to 496640 states and 928054 transitions. [2019-10-07 14:35:11,208 INFO L78 Accepts]: Start accepts. Automaton has 496640 states and 928054 transitions. Word has length 195 [2019-10-07 14:35:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:11,209 INFO L462 AbstractCegarLoop]: Abstraction has 496640 states and 928054 transitions. [2019-10-07 14:35:11,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:35:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 496640 states and 928054 transitions. [2019-10-07 14:35:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-07 14:35:11,216 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:11,216 INFO L385 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:11,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:35:11,417 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash 241915212, now seen corresponding path program 1 times [2019-10-07 14:35:11,418 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:11,419 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:11,419 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:11,419 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-07 14:35:11,660 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:11,661 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:35:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:35:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:12,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 3478 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-07 14:35:12,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:35:12,800 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:35:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-07 14:35:12,861 INFO L322 TraceCheckSpWp]: Computing backward predicates...