java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:05:48,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:05:48,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:05:48,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:05:48,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:05:48,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:05:48,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:05:48,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:05:48,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:05:48,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:05:48,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:05:48,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:05:48,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:05:48,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:05:48,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:05:48,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:05:48,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:05:48,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:05:48,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:05:48,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:05:48,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:05:48,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:05:48,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:05:48,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:05:48,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:05:48,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:05:48,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:05:48,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:05:48,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:05:48,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:05:48,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:05:48,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:05:48,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:05:48,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:05:48,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:05:48,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:05:48,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:05:48,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:05:48,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:05:48,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:05:48,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:05:48,695 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 03:05:48,734 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:05:48,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:05:48,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:05:48,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:05:48,737 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:05:48,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:05:48,738 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:05:48,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:05:48,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:05:48,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:05:48,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:05:48,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:05:48,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:05:48,741 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:05:48,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:05:48,741 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:05:48,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:05:48,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:05:48,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:05:48,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:05:48,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:05:48,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:05:48,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:05:48,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:05:48,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:05:48,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:05:48,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:05:48,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:05:48,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:05:49,133 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:05:49,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:05:49,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:05:49,160 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:05:49,160 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:05:49,161 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-15 03:05:49,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dee163aa/18d7c30d15bb4558a6624fc223d50b66/FLAG8c80e2f44 [2019-10-15 03:05:50,153 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:05:50,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-15 03:05:50,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dee163aa/18d7c30d15bb4558a6624fc223d50b66/FLAG8c80e2f44 [2019-10-15 03:05:50,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dee163aa/18d7c30d15bb4558a6624fc223d50b66 [2019-10-15 03:05:50,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:05:50,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:05:50,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:05:50,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:05:50,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:05:50,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:05:50" (1/1) ... [2019-10-15 03:05:50,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6b50f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:50, skipping insertion in model container [2019-10-15 03:05:50,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:05:50" (1/1) ... [2019-10-15 03:05:50,250 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:05:50,332 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:05:51,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:05:51,192 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:05:51,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:05:51,407 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:05:51,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51 WrapperNode [2019-10-15 03:05:51,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:05:51,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:05:51,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:05:51,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:05:51,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (1/1) ... [2019-10-15 03:05:51,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:05:51,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:05:51,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:05:51,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:05:51,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (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 03:05:51,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:05:51,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:05:51,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:05:51,742 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:05:51,742 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:05:51,742 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:05:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:05:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:05:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:05:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:05:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:05:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:05:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:05:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:05:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:05:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:05:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:05:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:05:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 03:05:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:05:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:05:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 03:05:51,746 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:05:51,747 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:05:51,747 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:05:51,747 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:05:51,747 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:05:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:05:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:05:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:05:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:05:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:05:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:05:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:05:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:05:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:05:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:05:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:05:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:05:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:05:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:05:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 03:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 03:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:05:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:05:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:05:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:05:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:05:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:05:51,752 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:05:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:05:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:05:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:05:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:05:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:05:51,754 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:05:51,754 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:05:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:05:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:05:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:05:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:05:51,756 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:05:51,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:05:51,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:05:51,756 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:05:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:05:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:05:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:05:51,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:05:51,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:05:51,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:05:51,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:05:51,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:05:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:05:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:05:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:05:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:05:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:05:51,761 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:05:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:05:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:05:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:05:51,762 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:05:51,763 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:05:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:05:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:05:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:05:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:05:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:05:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:05:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:05:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:05:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:05:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:05:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:05:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:05:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:05:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:05:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:05:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:05:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:05:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:05:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:05:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:05:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:05:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 03:05:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:05:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 03:05:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:05:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:05:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:05:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:05:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:05:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:05:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:05:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:05:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:05:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:05:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:05:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:05:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 03:05:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 03:05:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:05:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:05:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:05:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:05:51,774 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:05:51,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:05:51,774 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:05:51,774 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:05:51,775 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:05:51,776 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:05:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:05:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:05:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:05:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:05:51,781 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:05:51,781 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:05:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:05:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:05:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:05:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:05:51,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:05:51,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:05:51,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:05:51,792 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:05:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:05:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:05:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:05:57,878 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:05:57,878 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:05:57,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:05:57 BoogieIcfgContainer [2019-10-15 03:05:57,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:05:57,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:05:57,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:05:57,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:05:57,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:05:50" (1/3) ... [2019-10-15 03:05:57,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68514300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:05:57, skipping insertion in model container [2019-10-15 03:05:57,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:05:51" (2/3) ... [2019-10-15 03:05:57,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68514300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:05:57, skipping insertion in model container [2019-10-15 03:05:57,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:05:57" (3/3) ... [2019-10-15 03:05:57,891 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2019-10-15 03:05:57,902 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:05:57,912 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:05:57,926 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:05:57,977 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:05:57,977 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:05:57,978 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:05:57,978 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:05:57,978 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:05:57,978 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:05:57,978 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:05:57,978 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:05:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states. [2019-10-15 03:05:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 03:05:58,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:05:58,058 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:05:58,061 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:05:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:05:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 882516267, now seen corresponding path program 1 times [2019-10-15 03:05:58,095 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:05:58,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692031999] [2019-10-15 03:05:58,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:58,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:58,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:05:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:05:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:05:59,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692031999] [2019-10-15 03:05:59,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681097608] [2019-10-15 03:05:59,141 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 03:05:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:00,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 2929 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 03:06:00,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:06:00,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:06:00,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:00,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-10-15 03:06:00,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221136043] [2019-10-15 03:06:00,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:06:00,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:00,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:06:00,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:06:00,340 INFO L87 Difference]: Start difference. First operand 594 states. Second operand 2 states. [2019-10-15 03:06:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:00,441 INFO L93 Difference]: Finished difference Result 938 states and 1428 transitions. [2019-10-15 03:06:00,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:06:00,442 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 127 [2019-10-15 03:06:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:00,467 INFO L225 Difference]: With dead ends: 938 [2019-10-15 03:06:00,468 INFO L226 Difference]: Without dead ends: 477 [2019-10-15 03:06:00,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:06:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2019-10-15 03:06:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2019-10-15 03:06:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-10-15 03:06:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 710 transitions. [2019-10-15 03:06:00,589 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 710 transitions. Word has length 127 [2019-10-15 03:06:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:00,592 INFO L462 AbstractCegarLoop]: Abstraction has 477 states and 710 transitions. [2019-10-15 03:06:00,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:06:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 710 transitions. [2019-10-15 03:06:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 03:06:00,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:00,604 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:06:00,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:00,806 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1605727189, now seen corresponding path program 1 times [2019-10-15 03:06:00,807 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:00,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83395378] [2019-10-15 03:06:00,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:00,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:00,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:01,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83395378] [2019-10-15 03:06:01,363 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:01,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:01,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369196761] [2019-10-15 03:06:01,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:01,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:01,366 INFO L87 Difference]: Start difference. First operand 477 states and 710 transitions. Second operand 7 states. [2019-10-15 03:06:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:01,547 INFO L93 Difference]: Finished difference Result 927 states and 1402 transitions. [2019-10-15 03:06:01,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:01,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2019-10-15 03:06:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:01,567 INFO L225 Difference]: With dead ends: 927 [2019-10-15 03:06:01,567 INFO L226 Difference]: Without dead ends: 487 [2019-10-15 03:06:01,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2019-10-15 03:06:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 484. [2019-10-15 03:06:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-10-15 03:06:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 720 transitions. [2019-10-15 03:06:01,654 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 720 transitions. Word has length 127 [2019-10-15 03:06:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:01,655 INFO L462 AbstractCegarLoop]: Abstraction has 484 states and 720 transitions. [2019-10-15 03:06:01,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 720 transitions. [2019-10-15 03:06:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 03:06:01,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:01,661 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:06:01,662 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash 795441007, now seen corresponding path program 1 times [2019-10-15 03:06:01,662 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:01,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389053816] [2019-10-15 03:06:01,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:01,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:01,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:02,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389053816] [2019-10-15 03:06:02,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:02,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:02,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516271363] [2019-10-15 03:06:02,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:02,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:02,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:02,100 INFO L87 Difference]: Start difference. First operand 484 states and 720 transitions. Second operand 7 states. [2019-10-15 03:06:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:02,222 INFO L93 Difference]: Finished difference Result 939 states and 1418 transitions. [2019-10-15 03:06:02,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:02,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-10-15 03:06:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:02,236 INFO L225 Difference]: With dead ends: 939 [2019-10-15 03:06:02,236 INFO L226 Difference]: Without dead ends: 492 [2019-10-15 03:06:02,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-10-15 03:06:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 485. [2019-10-15 03:06:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2019-10-15 03:06:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 721 transitions. [2019-10-15 03:06:02,320 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 721 transitions. Word has length 128 [2019-10-15 03:06:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:02,324 INFO L462 AbstractCegarLoop]: Abstraction has 485 states and 721 transitions. [2019-10-15 03:06:02,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 721 transitions. [2019-10-15 03:06:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 03:06:02,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:02,336 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:06:02,336 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1706005297, now seen corresponding path program 1 times [2019-10-15 03:06:02,337 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:02,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188946260] [2019-10-15 03:06:02,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:02,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:02,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:02,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188946260] [2019-10-15 03:06:02,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:02,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:02,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047243435] [2019-10-15 03:06:02,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:02,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:02,946 INFO L87 Difference]: Start difference. First operand 485 states and 721 transitions. Second operand 7 states. [2019-10-15 03:06:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:03,065 INFO L93 Difference]: Finished difference Result 941 states and 1420 transitions. [2019-10-15 03:06:03,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:03,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-10-15 03:06:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:03,073 INFO L225 Difference]: With dead ends: 941 [2019-10-15 03:06:03,073 INFO L226 Difference]: Without dead ends: 493 [2019-10-15 03:06:03,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-10-15 03:06:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 486. [2019-10-15 03:06:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2019-10-15 03:06:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 722 transitions. [2019-10-15 03:06:03,110 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 722 transitions. Word has length 128 [2019-10-15 03:06:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:03,113 INFO L462 AbstractCegarLoop]: Abstraction has 486 states and 722 transitions. [2019-10-15 03:06:03,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 722 transitions. [2019-10-15 03:06:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-15 03:06:03,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:03,120 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:06:03,120 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1523899197, now seen corresponding path program 1 times [2019-10-15 03:06:03,121 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:03,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493563081] [2019-10-15 03:06:03,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:03,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:03,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:03,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493563081] [2019-10-15 03:06:03,348 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:03,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:06:03,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483689595] [2019-10-15 03:06:03,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:03,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:06:03,350 INFO L87 Difference]: Start difference. First operand 486 states and 722 transitions. Second operand 4 states. [2019-10-15 03:06:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:05,336 INFO L93 Difference]: Finished difference Result 1743 states and 2642 transitions. [2019-10-15 03:06:05,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:06:05,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-15 03:06:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:05,349 INFO L225 Difference]: With dead ends: 1743 [2019-10-15 03:06:05,349 INFO L226 Difference]: Without dead ends: 1294 [2019-10-15 03:06:05,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 03:06:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2019-10-15 03:06:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1284. [2019-10-15 03:06:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1284 states. [2019-10-15 03:06:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1921 transitions. [2019-10-15 03:06:05,427 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1921 transitions. Word has length 131 [2019-10-15 03:06:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:05,428 INFO L462 AbstractCegarLoop]: Abstraction has 1284 states and 1921 transitions. [2019-10-15 03:06:05,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1921 transitions. [2019-10-15 03:06:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 03:06:05,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:05,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:05,433 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:05,434 INFO L82 PathProgramCache]: Analyzing trace with hash -71400793, now seen corresponding path program 1 times [2019-10-15 03:06:05,435 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:05,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913482170] [2019-10-15 03:06:05,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:05,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:05,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:05,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913482170] [2019-10-15 03:06:05,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:05,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:06:05,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886133787] [2019-10-15 03:06:05,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:06:05,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:06:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:05,799 INFO L87 Difference]: Start difference. First operand 1284 states and 1921 transitions. Second operand 9 states. [2019-10-15 03:06:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:06,602 INFO L93 Difference]: Finished difference Result 2346 states and 3582 transitions. [2019-10-15 03:06:06,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 03:06:06,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 138 [2019-10-15 03:06:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:06,614 INFO L225 Difference]: With dead ends: 2346 [2019-10-15 03:06:06,615 INFO L226 Difference]: Without dead ends: 1400 [2019-10-15 03:06:06,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:06:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2019-10-15 03:06:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2019-10-15 03:06:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2019-10-15 03:06:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2096 transitions. [2019-10-15 03:06:06,706 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2096 transitions. Word has length 138 [2019-10-15 03:06:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:06,707 INFO L462 AbstractCegarLoop]: Abstraction has 1400 states and 2096 transitions. [2019-10-15 03:06:06,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:06:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2096 transitions. [2019-10-15 03:06:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-15 03:06:06,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:06,712 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:06,712 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash 830960031, now seen corresponding path program 1 times [2019-10-15 03:06:06,713 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:06,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828227852] [2019-10-15 03:06:06,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:06,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:06,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:06,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828227852] [2019-10-15 03:06:06,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:06,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:06:06,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883207551] [2019-10-15 03:06:06,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:06,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:06:06,929 INFO L87 Difference]: Start difference. First operand 1400 states and 2096 transitions. Second operand 4 states. [2019-10-15 03:06:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:08,850 INFO L93 Difference]: Finished difference Result 5370 states and 8388 transitions. [2019-10-15 03:06:08,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:06:08,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-15 03:06:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:08,894 INFO L225 Difference]: With dead ends: 5370 [2019-10-15 03:06:08,894 INFO L226 Difference]: Without dead ends: 4007 [2019-10-15 03:06:08,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 03:06:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2019-10-15 03:06:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3942. [2019-10-15 03:06:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2019-10-15 03:06:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 6063 transitions. [2019-10-15 03:06:09,240 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 6063 transitions. Word has length 139 [2019-10-15 03:06:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:09,241 INFO L462 AbstractCegarLoop]: Abstraction has 3942 states and 6063 transitions. [2019-10-15 03:06:09,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 6063 transitions. [2019-10-15 03:06:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 03:06:09,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:09,246 INFO L380 BasicCegarLoop]: trace histogram [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 03:06:09,246 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1523142433, now seen corresponding path program 1 times [2019-10-15 03:06:09,247 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:09,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040240180] [2019-10-15 03:06:09,247 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:09,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:09,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:09,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040240180] [2019-10-15 03:06:09,568 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:09,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:06:09,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344398217] [2019-10-15 03:06:09,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:06:09,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:09,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:06:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:09,573 INFO L87 Difference]: Start difference. First operand 3942 states and 6063 transitions. Second operand 9 states. [2019-10-15 03:06:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:11,352 INFO L93 Difference]: Finished difference Result 8306 states and 12901 transitions. [2019-10-15 03:06:11,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 03:06:11,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 141 [2019-10-15 03:06:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:11,405 INFO L225 Difference]: With dead ends: 8306 [2019-10-15 03:06:11,405 INFO L226 Difference]: Without dead ends: 5287 [2019-10-15 03:06:11,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:06:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5287 states. [2019-10-15 03:06:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5287 to 5214. [2019-10-15 03:06:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5214 states. [2019-10-15 03:06:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 8038 transitions. [2019-10-15 03:06:11,693 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 8038 transitions. Word has length 141 [2019-10-15 03:06:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:11,693 INFO L462 AbstractCegarLoop]: Abstraction has 5214 states and 8038 transitions. [2019-10-15 03:06:11,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:06:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 8038 transitions. [2019-10-15 03:06:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 03:06:11,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:11,699 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:06:11,699 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash 339496913, now seen corresponding path program 1 times [2019-10-15 03:06:11,700 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:11,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81015958] [2019-10-15 03:06:11,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:11,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:11,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:06:11,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81015958] [2019-10-15 03:06:11,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174647936] [2019-10-15 03:06:11,915 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 03:06:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:12,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:06:12,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:06:12,749 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:06:13,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:13,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 03:06:13,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326326202] [2019-10-15 03:06:13,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:13,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:06:13,193 INFO L87 Difference]: Start difference. First operand 5214 states and 8038 transitions. Second operand 4 states. [2019-10-15 03:06:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:13,494 INFO L93 Difference]: Finished difference Result 10445 states and 16304 transitions. [2019-10-15 03:06:13,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:13,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-15 03:06:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:13,571 INFO L225 Difference]: With dead ends: 10445 [2019-10-15 03:06:13,571 INFO L226 Difference]: Without dead ends: 5268 [2019-10-15 03:06:13,632 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:06:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2019-10-15 03:06:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2019-10-15 03:06:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2019-10-15 03:06:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8092 transitions. [2019-10-15 03:06:14,047 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8092 transitions. Word has length 144 [2019-10-15 03:06:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:14,048 INFO L462 AbstractCegarLoop]: Abstraction has 5268 states and 8092 transitions. [2019-10-15 03:06:14,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8092 transitions. [2019-10-15 03:06:14,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 03:06:14,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:14,073 INFO L380 BasicCegarLoop]: trace histogram [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 03:06:14,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:14,295 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1528274040, now seen corresponding path program 1 times [2019-10-15 03:06:14,296 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:14,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801070252] [2019-10-15 03:06:14,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:14,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:14,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:06:14,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801070252] [2019-10-15 03:06:14,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739493305] [2019-10-15 03:06:14,588 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 03:06:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:15,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:06:15,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 03:06:15,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:06:15,588 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:06:15,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-15 03:06:15,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847427486] [2019-10-15 03:06:15,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:15,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:15,591 INFO L87 Difference]: Start difference. First operand 5268 states and 8092 transitions. Second operand 5 states. [2019-10-15 03:06:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:15,801 INFO L93 Difference]: Finished difference Result 10526 states and 16326 transitions. [2019-10-15 03:06:15,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:15,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-10-15 03:06:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:15,868 INFO L225 Difference]: With dead ends: 10526 [2019-10-15 03:06:15,869 INFO L226 Difference]: Without dead ends: 5259 [2019-10-15 03:06:15,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2019-10-15 03:06:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5259. [2019-10-15 03:06:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5259 states. [2019-10-15 03:06:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 8056 transitions. [2019-10-15 03:06:16,229 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 8056 transitions. Word has length 146 [2019-10-15 03:06:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:16,232 INFO L462 AbstractCegarLoop]: Abstraction has 5259 states and 8056 transitions. [2019-10-15 03:06:16,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 8056 transitions. [2019-10-15 03:06:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 03:06:16,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:16,237 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:06:16,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:16,447 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1646341328, now seen corresponding path program 1 times [2019-10-15 03:06:16,448 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:16,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407792409] [2019-10-15 03:06:16,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:16,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:16,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 03:06:16,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407792409] [2019-10-15 03:06:16,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785202249] [2019-10-15 03:06:16,679 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 03:06:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:17,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:06:17,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:06:17,504 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:18,284 WARN L191 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-15 03:06:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:06:18,525 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:18,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-10-15 03:06:18,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541384661] [2019-10-15 03:06:18,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:18,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:06:18,528 INFO L87 Difference]: Start difference. First operand 5259 states and 8056 transitions. Second operand 5 states. [2019-10-15 03:06:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:20,564 INFO L93 Difference]: Finished difference Result 13510 states and 21562 transitions. [2019-10-15 03:06:20,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:06:20,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-15 03:06:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:20,633 INFO L225 Difference]: With dead ends: 13510 [2019-10-15 03:06:20,634 INFO L226 Difference]: Without dead ends: 8288 [2019-10-15 03:06:20,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:06:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2019-10-15 03:06:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 8233. [2019-10-15 03:06:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8233 states. [2019-10-15 03:06:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 12637 transitions. [2019-10-15 03:06:21,189 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 12637 transitions. Word has length 147 [2019-10-15 03:06:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:21,189 INFO L462 AbstractCegarLoop]: Abstraction has 8233 states and 12637 transitions. [2019-10-15 03:06:21,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 12637 transitions. [2019-10-15 03:06:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 03:06:21,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:21,204 INFO L380 BasicCegarLoop]: trace histogram [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 03:06:21,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:21,407 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -708222869, now seen corresponding path program 1 times [2019-10-15 03:06:21,408 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:21,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196566273] [2019-10-15 03:06:21,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:21,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:21,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:06:21,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196566273] [2019-10-15 03:06:21,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563042155] [2019-10-15 03:06:21,643 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 03:06:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:22,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:06:22,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:06:22,823 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:06:23,296 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:06:23,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-10-15 03:06:23,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781533575] [2019-10-15 03:06:23,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:23,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:23,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:23,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:23,301 INFO L87 Difference]: Start difference. First operand 8233 states and 12637 transitions. Second operand 5 states. [2019-10-15 03:06:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:23,657 INFO L93 Difference]: Finished difference Result 16545 states and 25799 transitions. [2019-10-15 03:06:23,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:23,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-15 03:06:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:23,717 INFO L225 Difference]: With dead ends: 16545 [2019-10-15 03:06:23,718 INFO L226 Difference]: Without dead ends: 8349 [2019-10-15 03:06:23,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:06:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states.