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_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:09:15,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:09:15,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:09:15,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:09:15,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:09:15,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:09:15,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:09:15,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:09:15,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:09:15,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:09:15,718 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:09:15,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:09:15,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:09:15,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:09:15,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:09:15,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:09:15,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:09:15,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:09:15,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:09:15,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:09:15,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:09:15,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:09:15,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:09:15,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:09:15,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:09:15,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:09:15,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:09:15,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:09:15,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:09:15,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:09:15,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:09:15,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:09:15,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:09:15,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:09:15,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:09:15,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:09:15,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:09:15,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:09:15,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:09:15,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:09:15,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:09:15,742 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 [2019-10-15 01:09:15,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:09:15,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:09:15,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:09:15,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:09:15,760 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:09:15,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:09:15,761 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:09:15,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:09:15,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:09:15,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:09:15,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:09:15,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:09:15,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:09:15,763 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:09:15,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:09:15,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:09:15,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:09:15,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:09:15,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:09:15,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:09:15,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:09:15,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:15,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:09:15,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:09:15,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:09:15,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:09:15,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:09:15,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:09:15,766 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 [2019-10-15 01:09:16,031 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:09:16,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:09:16,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:09:16,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:09:16,050 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:09:16,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c [2019-10-15 01:09:16,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbcb23efe/0158a38b277c47f6817963404b7a4f0a/FLAG754c49431 [2019-10-15 01:09:16,669 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:09:16,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c [2019-10-15 01:09:16,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbcb23efe/0158a38b277c47f6817963404b7a4f0a/FLAG754c49431 [2019-10-15 01:09:16,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbcb23efe/0158a38b277c47f6817963404b7a4f0a [2019-10-15 01:09:16,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:09:16,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:09:16,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:16,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:09:16,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:09:16,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:16" (1/1) ... [2019-10-15 01:09:16,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a409dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:16, skipping insertion in model container [2019-10-15 01:09:16,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:16" (1/1) ... [2019-10-15 01:09:16,957 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:09:17,033 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:09:17,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:17,816 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:09:17,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:18,037 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:09:18,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18 WrapperNode [2019-10-15 01:09:18,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:18,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:09:18,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:09:18,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:09:18,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (1/1) ... [2019-10-15 01:09:18,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:09:18,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:09:18,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:09:18,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:09:18,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (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 [2019-10-15 01:09:18,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:09:18,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:09:18,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:18,309 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:09:18,309 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:09:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:09:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:09:18,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:18,311 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:09:18,312 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:09:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:09:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:09:18,313 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:09:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:09:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:09:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:09:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:09:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:09:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:09:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:09:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:09:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:09:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:09:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:09:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:09:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:09:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:09:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:09:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:09:18,320 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:09:18,320 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:09:18,320 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:09:18,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:09:18,321 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:09:18,321 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:09:18,321 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:09:18,321 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:09:18,322 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:09:18,322 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:09:18,322 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:09:18,322 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:09:18,322 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:09:18,322 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:09:18,323 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:09:18,323 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:09:18,323 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:18,323 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:09:18,323 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:09:18,323 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:09:18,324 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:09:18,324 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:09:18,324 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:09:18,324 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:09:18,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:09:18,325 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:09:18,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:09:18,325 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:18,325 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:09:18,326 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:09:18,326 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:09:18,326 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:09:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:09:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:09:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:09:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:09:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:18,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:09:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:09:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:09:18,329 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:09:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:09:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:09:18,330 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:09:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:09:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:09:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:09:18,331 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:09:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:09:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:18,332 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:18,333 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:09:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:09:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:09:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:09:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:09:18,334 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:09:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:09:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:09:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:09:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:09:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:09:18,335 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:09:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:09:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:09:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:09:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:09:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:09:18,336 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:09:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:09:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:09:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:09:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:09:18,337 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:09:18,338 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:09:18,339 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:09:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:09:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:09:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:09:18,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:09:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:09:18,342 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:09:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:09:18,345 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:09:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:09:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:09:18,346 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:09:18,347 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:09:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:09:18,348 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:09:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:09:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:09:18,352 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:09:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:09:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:09:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:09:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:09:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:09:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:09:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:09:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:09:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:09:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:09:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:09:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:09:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:09:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:09:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:09:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:09:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:09:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:09:20,732 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:09:20,732 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:09:20,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:20 BoogieIcfgContainer [2019-10-15 01:09:20,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:09:20,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:09:20,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:09:20,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:09:20,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:09:16" (1/3) ... [2019-10-15 01:09:20,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc29c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:20, skipping insertion in model container [2019-10-15 01:09:20,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:18" (2/3) ... [2019-10-15 01:09:20,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc29c18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:20, skipping insertion in model container [2019-10-15 01:09:20,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:20" (3/3) ... [2019-10-15 01:09:20,744 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2019-10-15 01:09:20,754 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:09:20,764 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:09:20,778 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:09:20,819 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:09:20,819 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:09:20,819 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:09:20,819 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:09:20,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:09:20,820 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:09:20,820 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:09:20,820 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:09:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-10-15 01:09:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:09:20,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:20,902 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] [2019-10-15 01:09:20,905 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash 902898907, now seen corresponding path program 1 times [2019-10-15 01:09:20,920 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:20,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311328168] [2019-10-15 01:09:20,920 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:20,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:20,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:21,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311328168] [2019-10-15 01:09:21,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004685991] [2019-10-15 01:09:21,651 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 [2019-10-15 01:09:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:22,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:09:22,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:09:22,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:09:22,700 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:22,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:09:22,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306215109] [2019-10-15 01:09:22,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:09:22,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:09:22,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:09:22,721 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-10-15 01:09:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:22,820 INFO L93 Difference]: Finished difference Result 673 states and 1068 transitions. [2019-10-15 01:09:22,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:09:22,821 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 155 [2019-10-15 01:09:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:22,863 INFO L225 Difference]: With dead ends: 673 [2019-10-15 01:09:22,863 INFO L226 Difference]: Without dead ends: 636 [2019-10-15 01:09:22,870 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 [2019-10-15 01:09:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-15 01:09:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-15 01:09:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:09:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1013 transitions. [2019-10-15 01:09:22,993 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1013 transitions. Word has length 155 [2019-10-15 01:09:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:22,996 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1013 transitions. [2019-10-15 01:09:22,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:09:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1013 transitions. [2019-10-15 01:09:23,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:09:23,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:23,004 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] [2019-10-15 01:09:23,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:23,213 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash 598223950, now seen corresponding path program 1 times [2019-10-15 01:09:23,214 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:23,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664351594] [2019-10-15 01:09:23,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,215 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:23,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:23,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664351594] [2019-10-15 01:09:23,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093997165] [2019-10-15 01:09:23,485 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 [2019-10-15 01:09:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:24,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 3276 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:24,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:24,176 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:24,429 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:24,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:24,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68549074] [2019-10-15 01:09:24,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:24,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:24,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:24,435 INFO L87 Difference]: Start difference. First operand 636 states and 1013 transitions. Second operand 4 states. [2019-10-15 01:09:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:24,565 INFO L93 Difference]: Finished difference Result 1244 states and 1999 transitions. [2019-10-15 01:09:24,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:24,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-10-15 01:09:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:24,573 INFO L225 Difference]: With dead ends: 1244 [2019-10-15 01:09:24,573 INFO L226 Difference]: Without dead ends: 636 [2019-10-15 01:09:24,587 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 [2019-10-15 01:09:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-15 01:09:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-15 01:09:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:09:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1012 transitions. [2019-10-15 01:09:24,637 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1012 transitions. Word has length 157 [2019-10-15 01:09:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:24,637 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1012 transitions. [2019-10-15 01:09:24,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1012 transitions. [2019-10-15 01:09:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 01:09:24,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:24,645 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] [2019-10-15 01:09:24,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:24,899 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1074530708, now seen corresponding path program 1 times [2019-10-15 01:09:24,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:24,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608069638] [2019-10-15 01:09:24,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:24,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:24,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:25,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608069638] [2019-10-15 01:09:25,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947278810] [2019-10-15 01:09:25,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 01:09:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:25,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:25,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:25,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:25,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:25,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:25,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862699985] [2019-10-15 01:09:25,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:25,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:25,973 INFO L87 Difference]: Start difference. First operand 636 states and 1012 transitions. Second operand 4 states. [2019-10-15 01:09:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:26,059 INFO L93 Difference]: Finished difference Result 1244 states and 1997 transitions. [2019-10-15 01:09:26,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:26,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-10-15 01:09:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:26,066 INFO L225 Difference]: With dead ends: 1244 [2019-10-15 01:09:26,066 INFO L226 Difference]: Without dead ends: 636 [2019-10-15 01:09:26,069 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 [2019-10-15 01:09:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-10-15 01:09:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-10-15 01:09:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:09:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1011 transitions. [2019-10-15 01:09:26,101 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1011 transitions. Word has length 159 [2019-10-15 01:09:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:26,101 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1011 transitions. [2019-10-15 01:09:26,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1011 transitions. [2019-10-15 01:09:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:09:26,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:26,107 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] [2019-10-15 01:09:26,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:26,316 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash 480608966, now seen corresponding path program 1 times [2019-10-15 01:09:26,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:26,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313817013] [2019-10-15 01:09:26,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:26,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:26,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:26,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313817013] [2019-10-15 01:09:26,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146404543] [2019-10-15 01:09:26,460 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 [2019-10-15 01:09:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:27,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:27,144 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:27,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:27,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:27,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827630525] [2019-10-15 01:09:27,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:27,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:27,421 INFO L87 Difference]: Start difference. First operand 636 states and 1011 transitions. Second operand 4 states. [2019-10-15 01:09:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:27,527 INFO L93 Difference]: Finished difference Result 1251 states and 2004 transitions. [2019-10-15 01:09:27,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:27,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-15 01:09:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:27,533 INFO L225 Difference]: With dead ends: 1251 [2019-10-15 01:09:27,534 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:27,537 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 [2019-10-15 01:09:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1023 transitions. [2019-10-15 01:09:27,567 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1023 transitions. Word has length 161 [2019-10-15 01:09:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:27,567 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1023 transitions. [2019-10-15 01:09:27,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1023 transitions. [2019-10-15 01:09:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 01:09:27,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:27,573 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] [2019-10-15 01:09:27,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:27,790 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash 744578377, now seen corresponding path program 1 times [2019-10-15 01:09:27,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:27,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810754336] [2019-10-15 01:09:27,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:27,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:27,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:27,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810754336] [2019-10-15 01:09:27,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056807022] [2019-10-15 01:09:27,968 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 [2019-10-15 01:09:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:28,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:28,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:28,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:28,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:28,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580564613] [2019-10-15 01:09:28,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:28,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:28,929 INFO L87 Difference]: Start difference. First operand 645 states and 1023 transitions. Second operand 4 states. [2019-10-15 01:09:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:29,032 INFO L93 Difference]: Finished difference Result 1253 states and 2005 transitions. [2019-10-15 01:09:29,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:29,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 01:09:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:29,040 INFO L225 Difference]: With dead ends: 1253 [2019-10-15 01:09:29,040 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:29,045 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 [2019-10-15 01:09:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1022 transitions. [2019-10-15 01:09:29,084 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1022 transitions. Word has length 162 [2019-10-15 01:09:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:29,085 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1022 transitions. [2019-10-15 01:09:29,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1022 transitions. [2019-10-15 01:09:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:09:29,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:29,092 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] [2019-10-15 01:09:29,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:29,311 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash -831847774, now seen corresponding path program 1 times [2019-10-15 01:09:29,312 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:29,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163765858] [2019-10-15 01:09:29,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:29,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:29,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:29,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163765858] [2019-10-15 01:09:29,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608418285] [2019-10-15 01:09:29,496 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 [2019-10-15 01:09:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:30,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:30,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:30,177 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:30,473 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:30,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:30,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583391133] [2019-10-15 01:09:30,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:30,475 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:30,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:30,476 INFO L87 Difference]: Start difference. First operand 645 states and 1022 transitions. Second operand 4 states. [2019-10-15 01:09:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:30,573 INFO L93 Difference]: Finished difference Result 1253 states and 2004 transitions. [2019-10-15 01:09:30,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:30,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-15 01:09:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:30,580 INFO L225 Difference]: With dead ends: 1253 [2019-10-15 01:09:30,580 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:30,584 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 [2019-10-15 01:09:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-10-15 01:09:30,616 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 163 [2019-10-15 01:09:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:30,617 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-10-15 01:09:30,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-10-15 01:09:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:09:30,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:30,625 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] [2019-10-15 01:09:30,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:30,837 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:30,838 INFO L82 PathProgramCache]: Analyzing trace with hash 669005797, now seen corresponding path program 1 times [2019-10-15 01:09:30,838 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:30,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011337883] [2019-10-15 01:09:30,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:30,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:31,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011337883] [2019-10-15 01:09:31,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555761483] [2019-10-15 01:09:31,084 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 [2019-10-15 01:09:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:31,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:31,793 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:32,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:32,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:32,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88286376] [2019-10-15 01:09:32,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:32,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:32,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:32,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:32,061 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 4 states. [2019-10-15 01:09:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:32,254 INFO L93 Difference]: Finished difference Result 1252 states and 2004 transitions. [2019-10-15 01:09:32,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:32,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-15 01:09:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:32,262 INFO L225 Difference]: With dead ends: 1252 [2019-10-15 01:09:32,262 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:32,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1016 transitions. [2019-10-15 01:09:32,292 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1016 transitions. Word has length 164 [2019-10-15 01:09:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:32,293 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1016 transitions. [2019-10-15 01:09:32,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1016 transitions. [2019-10-15 01:09:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:09:32,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:32,298 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] [2019-10-15 01:09:32,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:32,507 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1950074191, now seen corresponding path program 1 times [2019-10-15 01:09:32,508 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:32,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804065821] [2019-10-15 01:09:32,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:32,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:32,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:32,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804065821] [2019-10-15 01:09:32,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767547895] [2019-10-15 01:09:32,778 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 [2019-10-15 01:09:33,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:33,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:33,503 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:33,768 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:33,768 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:33,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279654210] [2019-10-15 01:09:33,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:33,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:33,770 INFO L87 Difference]: Start difference. First operand 645 states and 1016 transitions. Second operand 4 states. [2019-10-15 01:09:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:33,937 INFO L93 Difference]: Finished difference Result 1252 states and 1994 transitions. [2019-10-15 01:09:33,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:33,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-15 01:09:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:33,944 INFO L225 Difference]: With dead ends: 1252 [2019-10-15 01:09:33,944 INFO L226 Difference]: Without dead ends: 645 [2019-10-15 01:09:33,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-15 01:09:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-15 01:09:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 01:09:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1011 transitions. [2019-10-15 01:09:33,971 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1011 transitions. Word has length 166 [2019-10-15 01:09:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:33,973 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1011 transitions. [2019-10-15 01:09:33,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1011 transitions. [2019-10-15 01:09:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:09:33,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:33,979 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] [2019-10-15 01:09:34,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:34,189 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 889413103, now seen corresponding path program 1 times [2019-10-15 01:09:34,190 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:34,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592437652] [2019-10-15 01:09:34,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:34,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592437652] [2019-10-15 01:09:34,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071244208] [2019-10-15 01:09:34,422 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 [2019-10-15 01:09:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:35,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 3287 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:35,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:35,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:35,477 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:35,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:35,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155014221] [2019-10-15 01:09:35,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:35,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:35,479 INFO L87 Difference]: Start difference. First operand 645 states and 1011 transitions. Second operand 4 states. [2019-10-15 01:09:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:35,718 INFO L93 Difference]: Finished difference Result 1288 states and 2043 transitions. [2019-10-15 01:09:35,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:35,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-15 01:09:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:35,724 INFO L225 Difference]: With dead ends: 1288 [2019-10-15 01:09:35,724 INFO L226 Difference]: Without dead ends: 684 [2019-10-15 01:09:35,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-15 01:09:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-10-15 01:09:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-15 01:09:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1075 transitions. [2019-10-15 01:09:35,753 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1075 transitions. Word has length 168 [2019-10-15 01:09:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:35,754 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1075 transitions. [2019-10-15 01:09:35,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1075 transitions. [2019-10-15 01:09:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 01:09:35,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:35,759 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] [2019-10-15 01:09:35,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:35,971 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash 666131544, now seen corresponding path program 1 times [2019-10-15 01:09:35,972 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:35,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534427308] [2019-10-15 01:09:35,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:35,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:35,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:36,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534427308] [2019-10-15 01:09:36,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230882987] [2019-10-15 01:09:36,137 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 [2019-10-15 01:09:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:37,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:37,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:37,115 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:37,363 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:37,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:09:37,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185469123] [2019-10-15 01:09:37,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:37,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:37,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:37,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:37,365 INFO L87 Difference]: Start difference. First operand 684 states and 1075 transitions. Second operand 4 states. [2019-10-15 01:09:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:37,571 INFO L93 Difference]: Finished difference Result 1291 states and 2046 transitions. [2019-10-15 01:09:37,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:37,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-15 01:09:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:37,578 INFO L225 Difference]: With dead ends: 1291 [2019-10-15 01:09:37,578 INFO L226 Difference]: Without dead ends: 684 [2019-10-15 01:09:37,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-10-15 01:09:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-10-15 01:09:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-15 01:09:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1070 transitions. [2019-10-15 01:09:37,603 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1070 transitions. Word has length 169 [2019-10-15 01:09:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:37,604 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1070 transitions. [2019-10-15 01:09:37,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1070 transitions. [2019-10-15 01:09:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 01:09:37,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:37,609 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] [2019-10-15 01:09:37,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:37,826 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1349098745, now seen corresponding path program 1 times [2019-10-15 01:09:37,827 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:37,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442872997] [2019-10-15 01:09:37,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:37,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442872997] [2019-10-15 01:09:37,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268300331] [2019-10-15 01:09:37,964 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 [2019-10-15 01:09:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:38,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:38,807 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:39,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:09:39,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:39,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:39,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605671182] [2019-10-15 01:09:39,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:39,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:39,417 INFO L87 Difference]: Start difference. First operand 684 states and 1070 transitions. Second operand 9 states. [2019-10-15 01:09:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:39,642 INFO L93 Difference]: Finished difference Result 1304 states and 2060 transitions. [2019-10-15 01:09:39,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:39,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 169 [2019-10-15 01:09:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:39,647 INFO L225 Difference]: With dead ends: 1304 [2019-10-15 01:09:39,648 INFO L226 Difference]: Without dead ends: 700 [2019-10-15 01:09:39,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 323 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-15 01:09:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 693. [2019-10-15 01:09:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-15 01:09:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1083 transitions. [2019-10-15 01:09:39,676 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1083 transitions. Word has length 169 [2019-10-15 01:09:39,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:39,676 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1083 transitions. [2019-10-15 01:09:39,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1083 transitions. [2019-10-15 01:09:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:39,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:39,682 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, 1] [2019-10-15 01:09:39,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:39,890 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1532717939, now seen corresponding path program 1 times [2019-10-15 01:09:39,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:39,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237715203] [2019-10-15 01:09:39,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:09:40,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237715203] [2019-10-15 01:09:40,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274218293] [2019-10-15 01:09:40,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 01:09:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:40,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:09:40,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:41,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:41,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:41,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777301308] [2019-10-15 01:09:41,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:41,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:41,015 INFO L87 Difference]: Start difference. First operand 693 states and 1083 transitions. Second operand 4 states. [2019-10-15 01:09:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:41,191 INFO L93 Difference]: Finished difference Result 1305 states and 2063 transitions. [2019-10-15 01:09:41,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:41,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-15 01:09:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:41,196 INFO L225 Difference]: With dead ends: 1305 [2019-10-15 01:09:41,197 INFO L226 Difference]: Without dead ends: 693 [2019-10-15 01:09:41,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-15 01:09:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-15 01:09:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-15 01:09:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1078 transitions. [2019-10-15 01:09:41,237 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1078 transitions. Word has length 170 [2019-10-15 01:09:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:41,237 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1078 transitions. [2019-10-15 01:09:41,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1078 transitions. [2019-10-15 01:09:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:09:41,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:41,247 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, 1, 1] [2019-10-15 01:09:41,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:41,457 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash -852054306, now seen corresponding path program 1 times [2019-10-15 01:09:41,458 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:41,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007389415] [2019-10-15 01:09:41,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:09:41,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007389415] [2019-10-15 01:09:41,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507759844] [2019-10-15 01:09:41,678 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 [2019-10-15 01:09:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:42,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:42,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:42,483 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:42,849 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:42,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:42,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094449095] [2019-10-15 01:09:42,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:42,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:42,851 INFO L87 Difference]: Start difference. First operand 693 states and 1078 transitions. Second operand 11 states. [2019-10-15 01:09:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:43,019 INFO L93 Difference]: Finished difference Result 1242 states and 1957 transitions. [2019-10-15 01:09:43,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:43,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-10-15 01:09:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:43,024 INFO L225 Difference]: With dead ends: 1242 [2019-10-15 01:09:43,024 INFO L226 Difference]: Without dead ends: 710 [2019-10-15 01:09:43,027 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-10-15 01:09:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 700. [2019-10-15 01:09:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-15 01:09:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1088 transitions. [2019-10-15 01:09:43,054 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1088 transitions. Word has length 171 [2019-10-15 01:09:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:43,054 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1088 transitions. [2019-10-15 01:09:43,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1088 transitions. [2019-10-15 01:09:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:43,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:43,060 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] [2019-10-15 01:09:43,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:43,269 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash -753784112, now seen corresponding path program 1 times [2019-10-15 01:09:43,269 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:43,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582219275] [2019-10-15 01:09:43,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:43,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582219275] [2019-10-15 01:09:43,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282399803] [2019-10-15 01:09:43,377 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 [2019-10-15 01:09:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:44,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:44,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:44,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:09:44,609 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:44,609 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:44,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410918772] [2019-10-15 01:09:44,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:44,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:44,611 INFO L87 Difference]: Start difference. First operand 700 states and 1088 transitions. Second operand 8 states. [2019-10-15 01:09:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:44,724 INFO L93 Difference]: Finished difference Result 1246 states and 1966 transitions. [2019-10-15 01:09:44,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:44,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2019-10-15 01:09:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:44,730 INFO L225 Difference]: With dead ends: 1246 [2019-10-15 01:09:44,730 INFO L226 Difference]: Without dead ends: 714 [2019-10-15 01:09:44,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2019-10-15 01:09:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 707. [2019-10-15 01:09:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-15 01:09:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1099 transitions. [2019-10-15 01:09:44,767 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1099 transitions. Word has length 170 [2019-10-15 01:09:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:44,768 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1099 transitions. [2019-10-15 01:09:44,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1099 transitions. [2019-10-15 01:09:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:09:44,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:44,775 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] [2019-10-15 01:09:44,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:44,986 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1017223344, now seen corresponding path program 1 times [2019-10-15 01:09:44,987 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:44,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758917622] [2019-10-15 01:09:44,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:44,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:44,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:09:45,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758917622] [2019-10-15 01:09:45,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456650177] [2019-10-15 01:09:45,090 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 [2019-10-15 01:09:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:45,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:09:45,902 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:46,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:09:46,389 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:46,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:46,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44675314] [2019-10-15 01:09:46,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:46,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:46,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:46,391 INFO L87 Difference]: Start difference. First operand 707 states and 1099 transitions. Second operand 14 states. [2019-10-15 01:09:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:46,757 INFO L93 Difference]: Finished difference Result 1247 states and 1966 transitions. [2019-10-15 01:09:46,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:46,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 170 [2019-10-15 01:09:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:46,762 INFO L225 Difference]: With dead ends: 1247 [2019-10-15 01:09:46,762 INFO L226 Difference]: Without dead ends: 715 [2019-10-15 01:09:46,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-10-15 01:09:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 707. [2019-10-15 01:09:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-15 01:09:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1099 transitions. [2019-10-15 01:09:46,798 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1099 transitions. Word has length 170 [2019-10-15 01:09:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:46,798 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1099 transitions. [2019-10-15 01:09:46,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1099 transitions. [2019-10-15 01:09:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:09:46,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:46,804 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] [2019-10-15 01:09:47,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:47,012 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -618074511, now seen corresponding path program 1 times [2019-10-15 01:09:47,012 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:47,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141747472] [2019-10-15 01:09:47,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:47,013 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:47,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:09:47,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141747472] [2019-10-15 01:09:47,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13304682] [2019-10-15 01:09:47,108 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 [2019-10-15 01:09:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:47,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:47,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:09:47,950 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:48,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:09:48,541 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:48,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:48,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143768639] [2019-10-15 01:09:48,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:48,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:48,543 INFO L87 Difference]: Start difference. First operand 707 states and 1099 transitions. Second operand 11 states. [2019-10-15 01:09:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:48,739 INFO L93 Difference]: Finished difference Result 1248 states and 1974 transitions. [2019-10-15 01:09:48,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:48,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-10-15 01:09:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:48,744 INFO L225 Difference]: With dead ends: 1248 [2019-10-15 01:09:48,744 INFO L226 Difference]: Without dead ends: 716 [2019-10-15 01:09:48,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 329 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-10-15 01:09:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 709. [2019-10-15 01:09:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-10-15 01:09:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1105 transitions. [2019-10-15 01:09:48,770 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1105 transitions. Word has length 171 [2019-10-15 01:09:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:48,770 INFO L462 AbstractCegarLoop]: Abstraction has 709 states and 1105 transitions. [2019-10-15 01:09:48,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1105 transitions. [2019-10-15 01:09:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 01:09:48,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:48,776 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, 1] [2019-10-15 01:09:48,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:48,984 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:48,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:48,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1414360821, now seen corresponding path program 1 times [2019-10-15 01:09:48,985 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:48,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633937848] [2019-10-15 01:09:48,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,986 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:09:49,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633937848] [2019-10-15 01:09:49,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853386346] [2019-10-15 01:09:49,099 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 [2019-10-15 01:09:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:49,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:50,003 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:50,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:50,333 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:50,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:50,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211109071] [2019-10-15 01:09:50,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:50,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:50,335 INFO L87 Difference]: Start difference. First operand 709 states and 1105 transitions. Second operand 9 states. [2019-10-15 01:09:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:50,463 INFO L93 Difference]: Finished difference Result 1344 states and 2139 transitions. [2019-10-15 01:09:50,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:50,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2019-10-15 01:09:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:50,468 INFO L225 Difference]: With dead ends: 1344 [2019-10-15 01:09:50,468 INFO L226 Difference]: Without dead ends: 718 [2019-10-15 01:09:50,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2019-10-15 01:09:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 716. [2019-10-15 01:09:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-15 01:09:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1113 transitions. [2019-10-15 01:09:50,497 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1113 transitions. Word has length 172 [2019-10-15 01:09:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:50,498 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1113 transitions. [2019-10-15 01:09:50,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1113 transitions. [2019-10-15 01:09:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:09:50,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:50,504 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:50,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:50,715 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash 342921674, now seen corresponding path program 1 times [2019-10-15 01:09:50,716 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:50,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114150756] [2019-10-15 01:09:50,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:09:50,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114150756] [2019-10-15 01:09:50,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858628212] [2019-10-15 01:09:50,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true