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_spec1_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:42,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:42,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:42,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:42,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:42,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:42,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:42,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:42,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:42,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:42,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:42,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:42,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:42,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:42,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:42,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:42,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:42,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:42,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:42,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:42,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:42,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:42,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:42,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:42,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:42,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:42,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:42,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:42,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:42,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:42,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:42,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:42,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:42,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:42,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:42,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:42,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:42,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:42,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:42,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:42,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:42,707 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 21:09:42,744 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:42,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:42,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:42,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:42,749 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:42,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:42,750 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:42,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:42,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:42,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:42,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:42,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:42,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:42,751 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:42,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:42,752 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:42,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:42,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:42,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:42,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:42,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:42,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:42,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:42,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:42,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:42,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:42,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:42,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:42,755 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 21:09:43,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:43,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:43,063 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:43,065 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:43,066 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:43,066 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c [2019-10-13 21:09:43,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8590605/e3e415f25d1646629f933be8fe8026af/FLAG911051d63 [2019-10-13 21:09:43,813 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:43,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product21.cil.c [2019-10-13 21:09:43,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8590605/e3e415f25d1646629f933be8fe8026af/FLAG911051d63 [2019-10-13 21:09:43,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c8590605/e3e415f25d1646629f933be8fe8026af [2019-10-13 21:09:44,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:44,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:44,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:44,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:44,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:44,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:44,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:44, skipping insertion in model container [2019-10-13 21:09:44,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:43" (1/1) ... [2019-10-13 21:09:44,021 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:44,110 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:44,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:44,842 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:45,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:45,123 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:45,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45 WrapperNode [2019-10-13 21:09:45,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:45,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:45,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:45,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:45,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:45,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:45,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:45,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:45,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (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 21:09:45,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:45,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:45,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:45,442 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:45,443 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:45,444 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:45,444 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:45,444 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:45,445 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:45,446 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:45,446 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:45,446 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:45,446 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:45,448 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:45,448 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:45,448 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:45,451 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:45,457 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:45,457 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:45,458 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:45,459 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:45,460 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:45,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:45,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:45,463 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:45,463 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:45,463 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:45,464 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:45,464 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:45,464 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:45,464 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:45,465 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:45,465 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:45,466 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:45,466 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:45,469 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:45,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:45,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:45,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:45,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:45,475 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:45,477 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:45,477 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:45,477 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:45,477 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:45,483 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:45,484 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:45,485 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:45,486 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:45,487 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:45,487 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:45,487 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:45,487 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:45,488 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:45,489 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:45,489 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:45,489 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:45,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:48,154 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:48,154 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:48,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:48 BoogieIcfgContainer [2019-10-13 21:09:48,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:48,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:48,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:48,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:48,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:43" (1/3) ... [2019-10-13 21:09:48,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62847858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:48, skipping insertion in model container [2019-10-13 21:09:48,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45" (2/3) ... [2019-10-13 21:09:48,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62847858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:48, skipping insertion in model container [2019-10-13 21:09:48,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:48" (3/3) ... [2019-10-13 21:09:48,164 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2019-10-13 21:09:48,174 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:48,184 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:48,197 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:48,232 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:48,232 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:48,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:48,232 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:48,233 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:48,233 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:48,233 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:48,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 21:09:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:09:48,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:48,309 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:48,314 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1975081631, now seen corresponding path program 1 times [2019-10-13 21:09:48,333 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:48,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459330948] [2019-10-13 21:09:48,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:48,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459330948] [2019-10-13 21:09:48,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232647597] [2019-10-13 21:09:48,993 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 21:09:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:49,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:09:49,769 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:09:50,033 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:50,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:50,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457054832] [2019-10-13 21:09:50,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:50,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:50,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:50,060 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 2 states. [2019-10-13 21:09:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:50,139 INFO L93 Difference]: Finished difference Result 657 states and 1045 transitions. [2019-10-13 21:09:50,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:50,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 155 [2019-10-13 21:09:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:50,179 INFO L225 Difference]: With dead ends: 657 [2019-10-13 21:09:50,179 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:09:50,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:09:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:09:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:09:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 990 transitions. [2019-10-13 21:09:50,379 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 990 transitions. Word has length 155 [2019-10-13 21:09:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:50,382 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 990 transitions. [2019-10-13 21:09:50,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 990 transitions. [2019-10-13 21:09:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 21:09:50,391 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:50,391 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:50,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,600 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1914277300, now seen corresponding path program 1 times [2019-10-13 21:09:50,601 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:50,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837375069] [2019-10-13 21:09:50,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:50,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837375069] [2019-10-13 21:09:50,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768638501] [2019-10-13 21:09:50,902 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 21:09:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 3276 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:51,639 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:51,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:51,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534212206] [2019-10-13 21:09:51,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:51,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:51,978 INFO L87 Difference]: Start difference. First operand 620 states and 990 transitions. Second operand 4 states. [2019-10-13 21:09:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:52,108 INFO L93 Difference]: Finished difference Result 1212 states and 1953 transitions. [2019-10-13 21:09:52,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:52,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-13 21:09:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:52,114 INFO L225 Difference]: With dead ends: 1212 [2019-10-13 21:09:52,115 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:09:52,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:09:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:09:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:09:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 989 transitions. [2019-10-13 21:09:52,168 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 989 transitions. Word has length 157 [2019-10-13 21:09:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:52,168 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 989 transitions. [2019-10-13 21:09:52,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 989 transitions. [2019-10-13 21:09:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 21:09:52,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:52,175 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:52,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,387 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,388 INFO L82 PathProgramCache]: Analyzing trace with hash 511513774, now seen corresponding path program 1 times [2019-10-13 21:09:52,388 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491542944] [2019-10-13 21:09:52,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:52,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491542944] [2019-10-13 21:09:52,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91893293] [2019-10-13 21:09:52,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:53,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:53,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:53,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:53,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509949074] [2019-10-13 21:09:53,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:53,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:53,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:53,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:53,568 INFO L87 Difference]: Start difference. First operand 620 states and 989 transitions. Second operand 4 states. [2019-10-13 21:09:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,655 INFO L93 Difference]: Finished difference Result 1212 states and 1951 transitions. [2019-10-13 21:09:53,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:53,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-10-13 21:09:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,661 INFO L225 Difference]: With dead ends: 1212 [2019-10-13 21:09:53,662 INFO L226 Difference]: Without dead ends: 620 [2019-10-13 21:09:53,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-13 21:09:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-10-13 21:09:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 21:09:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 988 transitions. [2019-10-13 21:09:53,701 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 988 transitions. Word has length 159 [2019-10-13 21:09:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:53,702 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 988 transitions. [2019-10-13 21:09:53,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 988 transitions. [2019-10-13 21:09:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:09:53,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:53,708 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:53,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,921 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1781427860, now seen corresponding path program 1 times [2019-10-13 21:09:53,923 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969636117] [2019-10-13 21:09:53,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:54,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969636117] [2019-10-13 21:09:54,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49739006] [2019-10-13 21:09:54,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:54,763 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:55,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:55,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345504704] [2019-10-13 21:09:55,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:55,031 INFO L87 Difference]: Start difference. First operand 620 states and 988 transitions. Second operand 4 states. [2019-10-13 21:09:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:55,123 INFO L93 Difference]: Finished difference Result 1219 states and 1958 transitions. [2019-10-13 21:09:55,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:55,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 21:09:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:55,130 INFO L225 Difference]: With dead ends: 1219 [2019-10-13 21:09:55,130 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:55,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-13 21:09:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:09:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1000 transitions. [2019-10-13 21:09:55,164 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1000 transitions. Word has length 161 [2019-10-13 21:09:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:55,164 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 1000 transitions. [2019-10-13 21:09:55,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1000 transitions. [2019-10-13 21:09:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 21:09:55,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:55,170 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:55,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,380 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash -831391142, now seen corresponding path program 1 times [2019-10-13 21:09:55,380 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764224729] [2019-10-13 21:09:55,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:55,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764224729] [2019-10-13 21:09:55,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208209214] [2019-10-13 21:09:55,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:56,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:56,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:56,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:56,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:56,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140839293] [2019-10-13 21:09:56,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:56,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:56,545 INFO L87 Difference]: Start difference. First operand 629 states and 1000 transitions. Second operand 4 states. [2019-10-13 21:09:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:56,631 INFO L93 Difference]: Finished difference Result 1221 states and 1959 transitions. [2019-10-13 21:09:56,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:56,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-13 21:09:56,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:56,646 INFO L225 Difference]: With dead ends: 1221 [2019-10-13 21:09:56,646 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:56,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-13 21:09:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:09:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 999 transitions. [2019-10-13 21:09:56,685 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 999 transitions. Word has length 162 [2019-10-13 21:09:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:56,686 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 999 transitions. [2019-10-13 21:09:56,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 999 transitions. [2019-10-13 21:09:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:09:56,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,692 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:56,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,900 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1680400040, now seen corresponding path program 1 times [2019-10-13 21:09:56,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:56,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985709306] [2019-10-13 21:09:56,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:56,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:57,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985709306] [2019-10-13 21:09:57,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956978483] [2019-10-13 21:09:57,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:57,767 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:58,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:58,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:58,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764940727] [2019-10-13 21:09:58,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:58,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:58,033 INFO L87 Difference]: Start difference. First operand 629 states and 999 transitions. Second operand 4 states. [2019-10-13 21:09:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,122 INFO L93 Difference]: Finished difference Result 1221 states and 1958 transitions. [2019-10-13 21:09:58,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:58,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-13 21:09:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,128 INFO L225 Difference]: With dead ends: 1221 [2019-10-13 21:09:58,128 INFO L226 Difference]: Without dead ends: 629 [2019-10-13 21:09:58,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-10-13 21:09:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2019-10-13 21:09:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:09:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 998 transitions. [2019-10-13 21:09:58,161 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 998 transitions. Word has length 163 [2019-10-13 21:09:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,161 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 998 transitions. [2019-10-13 21:09:58,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 998 transitions. [2019-10-13 21:09:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:58,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,167 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:58,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,376 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1066972054, now seen corresponding path program 1 times [2019-10-13 21:09:58,377 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070688786] [2019-10-13 21:09:58,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:58,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070688786] [2019-10-13 21:09:58,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577486481] [2019-10-13 21:09:58,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:59,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:09:59,520 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:59,946 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:09:59,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044645218] [2019-10-13 21:09:59,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:59,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:59,948 INFO L87 Difference]: Start difference. First operand 629 states and 998 transitions. Second operand 7 states. [2019-10-13 21:10:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:00,124 INFO L93 Difference]: Finished difference Result 1228 states and 1967 transitions. [2019-10-13 21:10:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:00,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 164 [2019-10-13 21:10:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:00,131 INFO L225 Difference]: With dead ends: 1228 [2019-10-13 21:10:00,131 INFO L226 Difference]: Without dead ends: 640 [2019-10-13 21:10:00,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 320 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:10:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-10-13 21:10:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2019-10-13 21:10:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-13 21:10:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1008 transitions. [2019-10-13 21:10:00,169 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1008 transitions. Word has length 164 [2019-10-13 21:10:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:00,170 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1008 transitions. [2019-10-13 21:10:00,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1008 transitions. [2019-10-13 21:10:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:10:00,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:00,178 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:00,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,395 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash 774586229, now seen corresponding path program 1 times [2019-10-13 21:10:00,397 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853010467] [2019-10-13 21:10:00,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:00,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853010467] [2019-10-13 21:10:00,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501956383] [2019-10-13 21:10:00,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:01,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:01,392 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:01,631 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:01,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:01,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786297044] [2019-10-13 21:10:01,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:01,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:01,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:01,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:01,633 INFO L87 Difference]: Start difference. First operand 636 states and 1008 transitions. Second operand 4 states. [2019-10-13 21:10:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,824 INFO L93 Difference]: Finished difference Result 1233 states and 1978 transitions. [2019-10-13 21:10:01,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:01,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-13 21:10:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,833 INFO L225 Difference]: With dead ends: 1233 [2019-10-13 21:10:01,833 INFO L226 Difference]: Without dead ends: 636 [2019-10-13 21:10:01,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-13 21:10:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-13 21:10:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-13 21:10:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1003 transitions. [2019-10-13 21:10:01,874 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1003 transitions. Word has length 164 [2019-10-13 21:10:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,877 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1003 transitions. [2019-10-13 21:10:01,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1003 transitions. [2019-10-13 21:10:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-13 21:10:01,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,882 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:02,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,091 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash -893831295, now seen corresponding path program 1 times [2019-10-13 21:10:02,092 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:02,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817025735] [2019-10-13 21:10:02,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:02,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:02,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817025735] [2019-10-13 21:10:02,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712039434] [2019-10-13 21:10:02,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:03,009 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:03,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:03,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:03,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631566174] [2019-10-13 21:10:03,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:03,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:03,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:03,301 INFO L87 Difference]: Start difference. First operand 636 states and 1003 transitions. Second operand 4 states. [2019-10-13 21:10:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:03,474 INFO L93 Difference]: Finished difference Result 1233 states and 1968 transitions. [2019-10-13 21:10:03,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:03,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-13 21:10:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:03,482 INFO L225 Difference]: With dead ends: 1233 [2019-10-13 21:10:03,482 INFO L226 Difference]: Without dead ends: 636 [2019-10-13 21:10:03,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-13 21:10:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-13 21:10:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-13 21:10:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 998 transitions. [2019-10-13 21:10:03,510 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 998 transitions. Word has length 167 [2019-10-13 21:10:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:03,511 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 998 transitions. [2019-10-13 21:10:03,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 998 transitions. [2019-10-13 21:10:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:10:03,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:03,518 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:03,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,728 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 241086921, now seen corresponding path program 1 times [2019-10-13 21:10:03,729 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991002539] [2019-10-13 21:10:03,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:03,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991002539] [2019-10-13 21:10:03,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397029212] [2019-10-13 21:10:03,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:04,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:04,630 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:04,875 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:04,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:04,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903370041] [2019-10-13 21:10:04,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:04,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:04,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:04,877 INFO L87 Difference]: Start difference. First operand 636 states and 998 transitions. Second operand 4 states. [2019-10-13 21:10:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,094 INFO L93 Difference]: Finished difference Result 1269 states and 2016 transitions. [2019-10-13 21:10:05,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:05,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-13 21:10:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,100 INFO L225 Difference]: With dead ends: 1269 [2019-10-13 21:10:05,101 INFO L226 Difference]: Without dead ends: 678 [2019-10-13 21:10:05,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2019-10-13 21:10:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 675. [2019-10-13 21:10:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-10-13 21:10:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1061 transitions. [2019-10-13 21:10:05,137 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1061 transitions. Word has length 169 [2019-10-13 21:10:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,138 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 1061 transitions. [2019-10-13 21:10:05,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1061 transitions. [2019-10-13 21:10:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:10:05,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,144 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:05,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,352 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1461572905, now seen corresponding path program 1 times [2019-10-13 21:10:05,352 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102468234] [2019-10-13 21:10:05,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:10:05,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102468234] [2019-10-13 21:10:05,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432816509] [2019-10-13 21:10:05,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 3287 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:06,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:06,665 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:06,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740194042] [2019-10-13 21:10:06,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:06,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:06,667 INFO L87 Difference]: Start difference. First operand 675 states and 1061 transitions. Second operand 4 states. [2019-10-13 21:10:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:06,878 INFO L93 Difference]: Finished difference Result 1269 states and 2014 transitions. [2019-10-13 21:10:06,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:06,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-13 21:10:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:06,884 INFO L225 Difference]: With dead ends: 1269 [2019-10-13 21:10:06,885 INFO L226 Difference]: Without dead ends: 675 [2019-10-13 21:10:06,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-10-13 21:10:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2019-10-13 21:10:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-10-13 21:10:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1056 transitions. [2019-10-13 21:10:06,913 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1056 transitions. Word has length 169 [2019-10-13 21:10:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:06,914 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 1056 transitions. [2019-10-13 21:10:06,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1056 transitions. [2019-10-13 21:10:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:10:06,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:06,920 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:07,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,130 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2144540106, now seen corresponding path program 1 times [2019-10-13 21:10:07,131 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401648909] [2019-10-13 21:10:07,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:07,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401648909] [2019-10-13 21:10:07,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135097852] [2019-10-13 21:10:07,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:08,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:08,481 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:08,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:08,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938480148] [2019-10-13 21:10:08,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:08,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:08,483 INFO L87 Difference]: Start difference. First operand 675 states and 1056 transitions. Second operand 11 states. [2019-10-13 21:10:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,623 INFO L93 Difference]: Finished difference Result 1206 states and 1909 transitions. [2019-10-13 21:10:08,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:08,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 169 [2019-10-13 21:10:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,628 INFO L225 Difference]: With dead ends: 1206 [2019-10-13 21:10:08,628 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:08,631 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 682. [2019-10-13 21:10:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 21:10:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1065 transitions. [2019-10-13 21:10:08,657 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1065 transitions. Word has length 169 [2019-10-13 21:10:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,658 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1065 transitions. [2019-10-13 21:10:08,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:08,658 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1065 transitions. [2019-10-13 21:10:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:08,663 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,663 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:08,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,877 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:08,878 INFO L82 PathProgramCache]: Analyzing trace with hash 418081852, now seen corresponding path program 1 times [2019-10-13 21:10:08,878 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:08,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731149226] [2019-10-13 21:10:08,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:08,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:09,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731149226] [2019-10-13 21:10:09,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240799335] [2019-10-13 21:10:09,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:09,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:09,832 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:10,349 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:10,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829057400] [2019-10-13 21:10:10,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:10,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:10,351 INFO L87 Difference]: Start difference. First operand 682 states and 1065 transitions. Second operand 9 states. [2019-10-13 21:10:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,642 INFO L93 Difference]: Finished difference Result 1285 states and 2031 transitions. [2019-10-13 21:10:10,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:10,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 170 [2019-10-13 21:10:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,648 INFO L225 Difference]: With dead ends: 1285 [2019-10-13 21:10:10,649 INFO L226 Difference]: Without dead ends: 690 [2019-10-13 21:10:10,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 325 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-13 21:10:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 684. [2019-10-13 21:10:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-13 21:10:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1070 transitions. [2019-10-13 21:10:10,683 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1070 transitions. Word has length 170 [2019-10-13 21:10:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,684 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1070 transitions. [2019-10-13 21:10:10,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1070 transitions. [2019-10-13 21:10:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:10:10,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,690 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:10,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,909 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1600776161, now seen corresponding path program 1 times [2019-10-13 21:10:10,910 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:10,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433192184] [2019-10-13 21:10:10,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:11,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433192184] [2019-10-13 21:10:11,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928875267] [2019-10-13 21:10:11,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:11,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:10:11,897 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:12,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:12,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:12,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867986151] [2019-10-13 21:10:12,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:12,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:12,173 INFO L87 Difference]: Start difference. First operand 684 states and 1070 transitions. Second operand 4 states. [2019-10-13 21:10:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,363 INFO L93 Difference]: Finished difference Result 1287 states and 2037 transitions. [2019-10-13 21:10:12,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:12,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-13 21:10:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,368 INFO L225 Difference]: With dead ends: 1287 [2019-10-13 21:10:12,369 INFO L226 Difference]: Without dead ends: 684 [2019-10-13 21:10:12,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-13 21:10:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-10-13 21:10:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-13 21:10:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1065 transitions. [2019-10-13 21:10:12,394 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1065 transitions. Word has length 171 [2019-10-13 21:10:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,394 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1065 transitions. [2019-10-13 21:10:12,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1065 transitions. [2019-10-13 21:10:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:10:12,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,399 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:12,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,608 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1668287785, now seen corresponding path program 1 times [2019-10-13 21:10:12,609 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975936777] [2019-10-13 21:10:12,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:12,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975936777] [2019-10-13 21:10:12,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564348429] [2019-10-13 21:10:12,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:13,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:13,634 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:10:13,986 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:13,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:13,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599615012] [2019-10-13 21:10:13,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:13,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:13,988 INFO L87 Difference]: Start difference. First operand 684 states and 1065 transitions. Second operand 8 states. [2019-10-13 21:10:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,108 INFO L93 Difference]: Finished difference Result 1214 states and 1920 transitions. [2019-10-13 21:10:14,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:14,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2019-10-13 21:10:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,115 INFO L225 Difference]: With dead ends: 1214 [2019-10-13 21:10:14,115 INFO L226 Difference]: Without dead ends: 698 [2019-10-13 21:10:14,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 335 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-13 21:10:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 691. [2019-10-13 21:10:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-13 21:10:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1076 transitions. [2019-10-13 21:10:14,153 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1076 transitions. Word has length 172 [2019-10-13 21:10:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,154 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1076 transitions. [2019-10-13 21:10:14,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1076 transitions. [2019-10-13 21:10:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:10:14,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,162 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:14,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,371 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1493406043, now seen corresponding path program 1 times [2019-10-13 21:10:14,372 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151460096] [2019-10-13 21:10:14,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:14,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151460096] [2019-10-13 21:10:14,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183573490] [2019-10-13 21:10:14,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:15,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:15,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:15,990 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:15,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:15,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777594379] [2019-10-13 21:10:15,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:15,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:15,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:15,992 INFO L87 Difference]: Start difference. First operand 691 states and 1076 transitions. Second operand 14 states. [2019-10-13 21:10:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:16,265 INFO L93 Difference]: Finished difference Result 1215 states and 1920 transitions. [2019-10-13 21:10:16,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:16,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 170 [2019-10-13 21:10:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:16,273 INFO L225 Difference]: With dead ends: 1215 [2019-10-13 21:10:16,273 INFO L226 Difference]: Without dead ends: 699 [2019-10-13 21:10:16,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-13 21:10:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 691. [2019-10-13 21:10:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-13 21:10:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1076 transitions. [2019-10-13 21:10:16,309 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1076 transitions. Word has length 170 [2019-10-13 21:10:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:16,311 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1076 transitions. [2019-10-13 21:10:16,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1076 transitions. [2019-10-13 21:10:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:10:16,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:16,317 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:16,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,528 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash 297236815, now seen corresponding path program 1 times [2019-10-13 21:10:16,529 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546737639] [2019-10-13 21:10:16,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:10:16,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546737639] [2019-10-13 21:10:16,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447288531] [2019-10-13 21:10:16,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:17,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:10:17,764 INFO L321 TraceCheckSpWp]: Computing backward predicates...