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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec2_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:11:07,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:11:07,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:11:07,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:11:07,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:11:07,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:11:07,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:11:07,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:11:07,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:11:07,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:11:07,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:11:07,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:11:07,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:11:07,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:11:07,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:11:07,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:11:07,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:11:07,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:11:07,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:11:07,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:11:07,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:11:07,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:11:07,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:11:07,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:11:07,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:11:07,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:11:07,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:11:07,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:11:07,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:11:07,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:11:07,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:11:07,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:11:07,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:11:07,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:11:07,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:11:07,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:11:07,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:11:07,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:11:07,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:11:07,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:11:07,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:11:07,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:11:07,787 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:11:07,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:11:07,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:11:07,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:11:07,789 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:11:07,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:11:07,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:11:07,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:11:07,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:11:07,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:11:07,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:11:07,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:11:07,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:11:07,791 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:11:07,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:11:07,791 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:11:07,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:11:07,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:11:07,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:11:07,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:11:07,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:11:07,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:07,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:11:07,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:11:07,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:11:07,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:11:07,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:11:07,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:11:07,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:11:08,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:11:08,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:11:08,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:11:08,094 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:11:08,095 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:11:08,095 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product32.cil.c [2019-10-13 21:11:08,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e210e6d3f/848d986818de430bb7fd860569261f9c/FLAG85ca74b3f [2019-10-13 21:11:08,838 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:11:08,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product32.cil.c [2019-10-13 21:11:08,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e210e6d3f/848d986818de430bb7fd860569261f9c/FLAG85ca74b3f [2019-10-13 21:11:08,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e210e6d3f/848d986818de430bb7fd860569261f9c [2019-10-13 21:11:09,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:11:09,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:11:09,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:09,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:11:09,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:11:09,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:09,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a2e2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:09, skipping insertion in model container [2019-10-13 21:11:09,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:09,025 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:11:09,118 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:11:09,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:09,874 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:11:10,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:10,131 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:11:10,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10 WrapperNode [2019-10-13 21:11:10,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:10,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:11:10,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:11:10,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:11:10,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... [2019-10-13 21:11:10,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:11:10,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:11:10,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:11:10,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:11:10,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:11:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:11:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:10,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:11:10,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:11:10,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:11:10,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:11:10,471 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:11:10,472 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:11:10,472 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:11:10,472 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:11:10,473 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:11:10,473 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:11:10,474 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:11:10,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:11:10,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:11:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:11:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:11:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:11:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:11:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:11:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:11:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:11:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:11:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:11:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:11:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:11:10,484 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:11:10,484 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:11:10,484 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:11:10,484 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:11:10,484 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:11:10,485 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:11:10,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:11:10,485 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:11:10,485 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:11:10,485 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:11:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:11:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:11:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:11:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:11:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:11:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:11:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:11:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:11:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:11:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:11:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:11:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:11:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:11:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:11:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:10,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:11:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:11:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:11:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:11:10,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:11:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:11:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:11:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:11:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:11:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:11:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:11:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:11:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:11:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:11:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:11:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:11:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:11:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:11:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:11:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:11:10,498 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:11:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:11:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:11:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:11:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:11:10,500 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:11:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:11:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:11:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:11:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:11:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:11:10,501 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:11:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:11:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:11:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:11:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:11:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:11:10,502 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:11:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:11:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:11:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:11:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:11:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:11:10,503 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:11:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:11:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:11:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:11:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:11:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:11:10,504 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:11:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:11:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:11:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:11:12,892 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:11:12,893 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:11:12,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:12 BoogieIcfgContainer [2019-10-13 21:11:12,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:11:12,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:11:12,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:11:12,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:11:12,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:11:08" (1/3) ... [2019-10-13 21:11:12,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ebbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:12, skipping insertion in model container [2019-10-13 21:11:12,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:10" (2/3) ... [2019-10-13 21:11:12,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ebbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:12, skipping insertion in model container [2019-10-13 21:11:12,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:12" (3/3) ... [2019-10-13 21:11:12,904 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2019-10-13 21:11:12,915 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:11:12,925 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:11:12,936 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:11:12,978 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:11:12,978 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:11:12,979 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:11:12,979 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:11:12,979 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:11:12,979 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:11:12,979 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:11:12,979 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:11:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states. [2019-10-13 21:11:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 21:11:13,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:13,052 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:13,057 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2061998394, now seen corresponding path program 1 times [2019-10-13 21:11:13,076 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:13,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234004761] [2019-10-13 21:11:13,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:13,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:13,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:13,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234004761] [2019-10-13 21:11:13,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:13,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:13,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745268] [2019-10-13 21:11:13,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:13,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:13,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:13,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:13,718 INFO L87 Difference]: Start difference. First operand 833 states. Second operand 4 states. [2019-10-13 21:11:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:13,938 INFO L93 Difference]: Finished difference Result 1315 states and 2101 transitions. [2019-10-13 21:11:13,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:13,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2019-10-13 21:11:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:13,985 INFO L225 Difference]: With dead ends: 1315 [2019-10-13 21:11:13,985 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:11:13,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:11:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:11:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:11:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1052 transitions. [2019-10-13 21:11:14,141 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1052 transitions. Word has length 85 [2019-10-13 21:11:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:14,141 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1052 transitions. [2019-10-13 21:11:14,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1052 transitions. [2019-10-13 21:11:14,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 21:11:14,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:14,150 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:14,151 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash 190887692, now seen corresponding path program 1 times [2019-10-13 21:11:14,152 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:14,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065145846] [2019-10-13 21:11:14,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:14,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065145846] [2019-10-13 21:11:14,448 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:14,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:14,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207273537] [2019-10-13 21:11:14,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:14,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:14,458 INFO L87 Difference]: Start difference. First operand 666 states and 1052 transitions. Second operand 4 states. [2019-10-13 21:11:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:14,562 INFO L93 Difference]: Finished difference Result 1295 states and 2062 transitions. [2019-10-13 21:11:14,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:14,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 21:11:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:14,577 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 21:11:14,578 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:11:14,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:11:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:11:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:11:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1051 transitions. [2019-10-13 21:11:14,637 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1051 transitions. Word has length 88 [2019-10-13 21:11:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:14,638 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1051 transitions. [2019-10-13 21:11:14,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1051 transitions. [2019-10-13 21:11:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 21:11:14,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:14,641 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:14,641 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash 594585961, now seen corresponding path program 1 times [2019-10-13 21:11:14,642 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:14,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039182024] [2019-10-13 21:11:14,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:14,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039182024] [2019-10-13 21:11:14,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:14,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:14,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765303630] [2019-10-13 21:11:14,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:14,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:14,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:14,874 INFO L87 Difference]: Start difference. First operand 666 states and 1051 transitions. Second operand 4 states. [2019-10-13 21:11:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:14,950 INFO L93 Difference]: Finished difference Result 1295 states and 2061 transitions. [2019-10-13 21:11:14,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:14,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-10-13 21:11:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:14,963 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 21:11:14,963 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:11:14,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:11:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:11:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:11:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1050 transitions. [2019-10-13 21:11:15,016 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1050 transitions. Word has length 89 [2019-10-13 21:11:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:15,016 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1050 transitions. [2019-10-13 21:11:15,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1050 transitions. [2019-10-13 21:11:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 21:11:15,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:15,020 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:15,020 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash 305679912, now seen corresponding path program 1 times [2019-10-13 21:11:15,021 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:15,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776784501] [2019-10-13 21:11:15,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:15,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776784501] [2019-10-13 21:11:15,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:15,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:15,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586964127] [2019-10-13 21:11:15,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:15,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:15,217 INFO L87 Difference]: Start difference. First operand 666 states and 1050 transitions. Second operand 4 states. [2019-10-13 21:11:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:15,299 INFO L93 Difference]: Finished difference Result 1295 states and 2060 transitions. [2019-10-13 21:11:15,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:15,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-10-13 21:11:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:15,314 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 21:11:15,315 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:11:15,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:11:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:11:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:11:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1049 transitions. [2019-10-13 21:11:15,351 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1049 transitions. Word has length 90 [2019-10-13 21:11:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:15,352 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1049 transitions. [2019-10-13 21:11:15,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1049 transitions. [2019-10-13 21:11:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 21:11:15,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:15,360 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:15,361 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash 20876485, now seen corresponding path program 1 times [2019-10-13 21:11:15,361 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:15,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950645858] [2019-10-13 21:11:15,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:15,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950645858] [2019-10-13 21:11:15,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:15,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:15,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752873010] [2019-10-13 21:11:15,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:15,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:15,509 INFO L87 Difference]: Start difference. First operand 666 states and 1049 transitions. Second operand 4 states. [2019-10-13 21:11:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:15,579 INFO L93 Difference]: Finished difference Result 1295 states and 2059 transitions. [2019-10-13 21:11:15,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:15,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-10-13 21:11:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:15,587 INFO L225 Difference]: With dead ends: 1295 [2019-10-13 21:11:15,588 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:11:15,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:11:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2019-10-13 21:11:15,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-13 21:11:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1048 transitions. [2019-10-13 21:11:15,622 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1048 transitions. Word has length 91 [2019-10-13 21:11:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:15,623 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 1048 transitions. [2019-10-13 21:11:15,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1048 transitions. [2019-10-13 21:11:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 21:11:15,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:15,627 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:15,627 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash -136745660, now seen corresponding path program 1 times [2019-10-13 21:11:15,628 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:15,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483797019] [2019-10-13 21:11:15,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:15,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483797019] [2019-10-13 21:11:15,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:15,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 21:11:15,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327878694] [2019-10-13 21:11:15,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:11:15,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:11:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:15,915 INFO L87 Difference]: Start difference. First operand 666 states and 1048 transitions. Second operand 10 states. [2019-10-13 21:11:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,074 INFO L93 Difference]: Finished difference Result 1253 states and 1979 transitions. [2019-10-13 21:11:16,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:11:16,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2019-10-13 21:11:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,081 INFO L225 Difference]: With dead ends: 1253 [2019-10-13 21:11:16,081 INFO L226 Difference]: Without dead ends: 675 [2019-10-13 21:11:16,084 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:11:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-10-13 21:11:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2019-10-13 21:11:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-13 21:11:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1057 transitions. [2019-10-13 21:11:16,111 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1057 transitions. Word has length 92 [2019-10-13 21:11:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,112 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1057 transitions. [2019-10-13 21:11:16,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:11:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1057 transitions. [2019-10-13 21:11:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 21:11:16,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,114 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,115 INFO L82 PathProgramCache]: Analyzing trace with hash -116408285, now seen corresponding path program 1 times [2019-10-13 21:11:16,115 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081984601] [2019-10-13 21:11:16,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:16,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081984601] [2019-10-13 21:11:16,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:16,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:16,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453102691] [2019-10-13 21:11:16,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:16,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:16,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:16,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:16,217 INFO L87 Difference]: Start difference. First operand 673 states and 1057 transitions. Second operand 4 states. [2019-10-13 21:11:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,271 INFO L93 Difference]: Finished difference Result 1301 states and 2065 transitions. [2019-10-13 21:11:16,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:16,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-13 21:11:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,277 INFO L225 Difference]: With dead ends: 1301 [2019-10-13 21:11:16,277 INFO L226 Difference]: Without dead ends: 660 [2019-10-13 21:11:16,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-10-13 21:11:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-10-13 21:11:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 21:11:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1034 transitions. [2019-10-13 21:11:16,303 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1034 transitions. Word has length 92 [2019-10-13 21:11:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,304 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1034 transitions. [2019-10-13 21:11:16,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1034 transitions. [2019-10-13 21:11:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 21:11:16,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,306 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,306 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1615644955, now seen corresponding path program 1 times [2019-10-13 21:11:16,307 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156060935] [2019-10-13 21:11:16,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:16,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156060935] [2019-10-13 21:11:16,431 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:16,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:16,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982174679] [2019-10-13 21:11:16,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:16,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:16,433 INFO L87 Difference]: Start difference. First operand 660 states and 1034 transitions. Second operand 6 states. [2019-10-13 21:11:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,743 INFO L93 Difference]: Finished difference Result 1241 states and 1957 transitions. [2019-10-13 21:11:16,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:16,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-10-13 21:11:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,749 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 21:11:16,749 INFO L226 Difference]: Without dead ends: 660 [2019-10-13 21:11:16,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-10-13 21:11:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-10-13 21:11:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 21:11:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1030 transitions. [2019-10-13 21:11:16,774 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1030 transitions. Word has length 93 [2019-10-13 21:11:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,775 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1030 transitions. [2019-10-13 21:11:16,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1030 transitions. [2019-10-13 21:11:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:11:16,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,777 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,777 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash -129454137, now seen corresponding path program 1 times [2019-10-13 21:11:16,778 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078828366] [2019-10-13 21:11:16,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,779 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:16,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078828366] [2019-10-13 21:11:16,898 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:16,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:16,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813733615] [2019-10-13 21:11:16,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:16,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:16,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:16,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:16,899 INFO L87 Difference]: Start difference. First operand 660 states and 1030 transitions. Second operand 6 states. [2019-10-13 21:11:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:17,109 INFO L93 Difference]: Finished difference Result 1241 states and 1953 transitions. [2019-10-13 21:11:17,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:17,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-10-13 21:11:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:17,115 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 21:11:17,115 INFO L226 Difference]: Without dead ends: 660 [2019-10-13 21:11:17,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-10-13 21:11:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-10-13 21:11:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 21:11:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1026 transitions. [2019-10-13 21:11:17,140 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1026 transitions. Word has length 94 [2019-10-13 21:11:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:17,140 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1026 transitions. [2019-10-13 21:11:17,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1026 transitions. [2019-10-13 21:11:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:11:17,142 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:17,142 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:17,143 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1340975830, now seen corresponding path program 1 times [2019-10-13 21:11:17,143 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:17,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792176998] [2019-10-13 21:11:17,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:17,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792176998] [2019-10-13 21:11:17,268 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:17,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:17,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462380182] [2019-10-13 21:11:17,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:17,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:17,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:17,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:17,270 INFO L87 Difference]: Start difference. First operand 660 states and 1026 transitions. Second operand 6 states. [2019-10-13 21:11:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:17,491 INFO L93 Difference]: Finished difference Result 1241 states and 1949 transitions. [2019-10-13 21:11:17,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:17,492 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-13 21:11:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:17,497 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 21:11:17,497 INFO L226 Difference]: Without dead ends: 660 [2019-10-13 21:11:17,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2019-10-13 21:11:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 660. [2019-10-13 21:11:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-13 21:11:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1022 transitions. [2019-10-13 21:11:17,549 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1022 transitions. Word has length 95 [2019-10-13 21:11:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:17,550 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 1022 transitions. [2019-10-13 21:11:17,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1022 transitions. [2019-10-13 21:11:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:11:17,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:17,551 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:17,552 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:17,552 INFO L82 PathProgramCache]: Analyzing trace with hash -293121622, now seen corresponding path program 1 times [2019-10-13 21:11:17,552 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:17,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130467157] [2019-10-13 21:11:17,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:17,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130467157] [2019-10-13 21:11:17,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:17,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:17,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794351871] [2019-10-13 21:11:17,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:17,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:17,731 INFO L87 Difference]: Start difference. First operand 660 states and 1022 transitions. Second operand 7 states. [2019-10-13 21:11:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:17,815 INFO L93 Difference]: Finished difference Result 1241 states and 1945 transitions. [2019-10-13 21:11:17,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:17,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-10-13 21:11:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:17,821 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 21:11:17,821 INFO L226 Difference]: Without dead ends: 639 [2019-10-13 21:11:17,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-13 21:11:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2019-10-13 21:11:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2019-10-13 21:11:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 988 transitions. [2019-10-13 21:11:17,845 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 988 transitions. Word has length 95 [2019-10-13 21:11:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:17,846 INFO L462 AbstractCegarLoop]: Abstraction has 639 states and 988 transitions. [2019-10-13 21:11:17,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 988 transitions. [2019-10-13 21:11:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 21:11:17,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:17,848 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:17,848 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash -282239444, now seen corresponding path program 1 times [2019-10-13 21:11:17,849 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:17,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327295816] [2019-10-13 21:11:17,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:17,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327295816] [2019-10-13 21:11:17,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:17,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:17,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045476727] [2019-10-13 21:11:17,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:17,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:17,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:17,964 INFO L87 Difference]: Start difference. First operand 639 states and 988 transitions. Second operand 6 states. [2019-10-13 21:11:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:18,063 INFO L93 Difference]: Finished difference Result 1220 states and 1911 transitions. [2019-10-13 21:11:18,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:18,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-13 21:11:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:18,069 INFO L225 Difference]: With dead ends: 1220 [2019-10-13 21:11:18,069 INFO L226 Difference]: Without dead ends: 639 [2019-10-13 21:11:18,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-13 21:11:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2019-10-13 21:11:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2019-10-13 21:11:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 987 transitions. [2019-10-13 21:11:18,096 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 987 transitions. Word has length 96 [2019-10-13 21:11:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:18,096 INFO L462 AbstractCegarLoop]: Abstraction has 639 states and 987 transitions. [2019-10-13 21:11:18,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 987 transitions. [2019-10-13 21:11:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 21:11:18,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:18,098 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:18,099 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1859946641, now seen corresponding path program 1 times [2019-10-13 21:11:18,099 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:18,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690700944] [2019-10-13 21:11:18,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:18,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:18,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:18,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690700944] [2019-10-13 21:11:18,214 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:18,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:18,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420421821] [2019-10-13 21:11:18,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:18,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:18,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:18,216 INFO L87 Difference]: Start difference. First operand 639 states and 987 transitions. Second operand 6 states. [2019-10-13 21:11:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:18,309 INFO L93 Difference]: Finished difference Result 1220 states and 1910 transitions. [2019-10-13 21:11:18,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:18,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-10-13 21:11:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:18,315 INFO L225 Difference]: With dead ends: 1220 [2019-10-13 21:11:18,315 INFO L226 Difference]: Without dead ends: 639 [2019-10-13 21:11:18,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-13 21:11:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2019-10-13 21:11:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2019-10-13 21:11:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 986 transitions. [2019-10-13 21:11:18,340 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 986 transitions. Word has length 97 [2019-10-13 21:11:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:18,340 INFO L462 AbstractCegarLoop]: Abstraction has 639 states and 986 transitions. [2019-10-13 21:11:18,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 986 transitions. [2019-10-13 21:11:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 21:11:18,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:18,342 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:18,343 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash 731941009, now seen corresponding path program 1 times [2019-10-13 21:11:18,343 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:18,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319143184] [2019-10-13 21:11:18,344 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:18,344 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:18,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:18,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319143184] [2019-10-13 21:11:18,578 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:18,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:11:18,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074534569] [2019-10-13 21:11:18,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:11:18,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:11:18,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:18,580 INFO L87 Difference]: Start difference. First operand 639 states and 986 transitions. Second operand 12 states. [2019-10-13 21:11:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:18,756 INFO L93 Difference]: Finished difference Result 1221 states and 1909 transitions. [2019-10-13 21:11:18,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:11:18,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2019-10-13 21:11:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:18,762 INFO L225 Difference]: With dead ends: 1221 [2019-10-13 21:11:18,762 INFO L226 Difference]: Without dead ends: 639 [2019-10-13 21:11:18,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-13 21:11:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2019-10-13 21:11:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2019-10-13 21:11:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 985 transitions. [2019-10-13 21:11:18,787 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 985 transitions. Word has length 98 [2019-10-13 21:11:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:18,787 INFO L462 AbstractCegarLoop]: Abstraction has 639 states and 985 transitions. [2019-10-13 21:11:18,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:11:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 985 transitions. [2019-10-13 21:11:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 21:11:18,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:18,789 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:18,789 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:18,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2083976240, now seen corresponding path program 1 times [2019-10-13 21:11:18,790 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:18,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699466266] [2019-10-13 21:11:18,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:18,791 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:18,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:18,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699466266] [2019-10-13 21:11:18,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:18,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:18,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789223571] [2019-10-13 21:11:18,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:18,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:18,963 INFO L87 Difference]: Start difference. First operand 639 states and 985 transitions. Second operand 6 states. [2019-10-13 21:11:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:22,929 INFO L93 Difference]: Finished difference Result 1881 states and 2985 transitions. [2019-10-13 21:11:22,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:22,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-10-13 21:11:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:22,940 INFO L225 Difference]: With dead ends: 1881 [2019-10-13 21:11:22,940 INFO L226 Difference]: Without dead ends: 1308 [2019-10-13 21:11:22,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2019-10-13 21:11:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1181. [2019-10-13 21:11:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1181 states. [2019-10-13 21:11:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1867 transitions. [2019-10-13 21:11:22,998 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1867 transitions. Word has length 99 [2019-10-13 21:11:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:22,998 INFO L462 AbstractCegarLoop]: Abstraction has 1181 states and 1867 transitions. [2019-10-13 21:11:22,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1867 transitions. [2019-10-13 21:11:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 21:11:23,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:23,003 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:23,004 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:23,004 INFO L82 PathProgramCache]: Analyzing trace with hash -525779042, now seen corresponding path program 1 times [2019-10-13 21:11:23,004 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:23,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007892972] [2019-10-13 21:11:23,005 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:23,005 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:23,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:11:23,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007892972] [2019-10-13 21:11:23,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739932986] [2019-10-13 21:11:23,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:23,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 3053 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:23,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:24,014 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:25,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:25,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-10-13 21:11:25,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031756360] [2019-10-13 21:11:25,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:25,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:25,083 INFO L87 Difference]: Start difference. First operand 1181 states and 1867 transitions. Second operand 5 states. [2019-10-13 21:11:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:26,125 INFO L93 Difference]: Finished difference Result 2312 states and 3749 transitions. [2019-10-13 21:11:26,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:26,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2019-10-13 21:11:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:26,139 INFO L225 Difference]: With dead ends: 2312 [2019-10-13 21:11:26,139 INFO L226 Difference]: Without dead ends: 1197 [2019-10-13 21:11:26,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 316 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:11:26,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2019-10-13 21:11:26,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1197. [2019-10-13 21:11:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2019-10-13 21:11:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1893 transitions. [2019-10-13 21:11:26,210 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1893 transitions. Word has length 158 [2019-10-13 21:11:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:26,211 INFO L462 AbstractCegarLoop]: Abstraction has 1197 states and 1893 transitions. [2019-10-13 21:11:26,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1893 transitions. [2019-10-13 21:11:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 21:11:26,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:26,217 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:26,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:26,434 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1744365104, now seen corresponding path program 1 times [2019-10-13 21:11:26,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:26,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973363097] [2019-10-13 21:11:26,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:26,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:26,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:11:26,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973363097] [2019-10-13 21:11:26,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:26,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:11:26,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165918566] [2019-10-13 21:11:26,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:11:26,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:26,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:11:26,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:26,647 INFO L87 Difference]: Start difference. First operand 1197 states and 1893 transitions. Second operand 12 states. [2019-10-13 21:11:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:38,313 INFO L93 Difference]: Finished difference Result 3946 states and 6250 transitions. [2019-10-13 21:11:38,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 21:11:38,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 159 [2019-10-13 21:11:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:38,335 INFO L225 Difference]: With dead ends: 3946 [2019-10-13 21:11:38,336 INFO L226 Difference]: Without dead ends: 2815 [2019-10-13 21:11:38,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-10-13 21:11:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2019-10-13 21:11:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2757. [2019-10-13 21:11:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2757 states. [2019-10-13 21:11:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4322 transitions. [2019-10-13 21:11:38,512 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4322 transitions. Word has length 159 [2019-10-13 21:11:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:38,513 INFO L462 AbstractCegarLoop]: Abstraction has 2757 states and 4322 transitions. [2019-10-13 21:11:38,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:11:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4322 transitions. [2019-10-13 21:11:38,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 21:11:38,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:38,520 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:38,521 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1788724176, now seen corresponding path program 1 times [2019-10-13 21:11:38,521 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:38,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145950984] [2019-10-13 21:11:38,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:38,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145950984] [2019-10-13 21:11:38,783 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:38,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:38,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402246715] [2019-10-13 21:11:38,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:38,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:38,786 INFO L87 Difference]: Start difference. First operand 2757 states and 4322 transitions. Second operand 6 states. [2019-10-13 21:11:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:39,776 INFO L93 Difference]: Finished difference Result 5504 states and 8847 transitions. [2019-10-13 21:11:39,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:39,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-10-13 21:11:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:39,797 INFO L225 Difference]: With dead ends: 5504 [2019-10-13 21:11:39,798 INFO L226 Difference]: Without dead ends: 2797 [2019-10-13 21:11:39,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:11:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2019-10-13 21:11:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2797. [2019-10-13 21:11:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2797 states. [2019-10-13 21:11:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 4352 transitions. [2019-10-13 21:11:39,961 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 4352 transitions. Word has length 160 [2019-10-13 21:11:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:39,961 INFO L462 AbstractCegarLoop]: Abstraction has 2797 states and 4352 transitions. [2019-10-13 21:11:39,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 4352 transitions. [2019-10-13 21:11:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:11:39,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:39,967 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-13 21:11:39,967 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:39,968 INFO L82 PathProgramCache]: Analyzing trace with hash -400317090, now seen corresponding path program 1 times [2019-10-13 21:11:39,968 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:39,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833242484] [2019-10-13 21:11:39,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:39,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:39,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:11:40,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833242484] [2019-10-13 21:11:40,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26212684] [2019-10-13 21:11:40,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:40,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 3057 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:40,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:41,034 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:41,917 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:41,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-10-13 21:11:41,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850127762] [2019-10-13 21:11:41,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:41,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:41,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:41,919 INFO L87 Difference]: Start difference. First operand 2797 states and 4352 transitions. Second operand 5 states. [2019-10-13 21:11:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:42,940 INFO L93 Difference]: Finished difference Result 5592 states and 8893 transitions. [2019-10-13 21:11:42,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:42,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2019-10-13 21:11:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:42,960 INFO L225 Difference]: With dead ends: 5592 [2019-10-13 21:11:42,960 INFO L226 Difference]: Without dead ends: 2861 [2019-10-13 21:11:42,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 324 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:11:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2019-10-13 21:11:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2861. [2019-10-13 21:11:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-10-13 21:11:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4454 transitions. [2019-10-13 21:11:43,110 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4454 transitions. Word has length 162 [2019-10-13 21:11:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:43,111 INFO L462 AbstractCegarLoop]: Abstraction has 2861 states and 4454 transitions. [2019-10-13 21:11:43,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4454 transitions. [2019-10-13 21:11:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:11:43,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:43,120 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-13 21:11:43,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:43,328 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1324897512, now seen corresponding path program 1 times [2019-10-13 21:11:43,329 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:43,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837781904] [2019-10-13 21:11:43,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:43,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:43,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY