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_spec2_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 14:15:24,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 14:15:24,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 14:15:24,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 14:15:24,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 14:15:24,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 14:15:24,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 14:15:24,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 14:15:24,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 14:15:24,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 14:15:24,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 14:15:24,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 14:15:24,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 14:15:24,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 14:15:24,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 14:15:24,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 14:15:24,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 14:15:24,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 14:15:24,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 14:15:24,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 14:15:24,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 14:15:24,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 14:15:24,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 14:15:24,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 14:15:24,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 14:15:24,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 14:15:24,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 14:15:24,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 14:15:24,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 14:15:24,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 14:15:24,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 14:15:24,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 14:15:24,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 14:15:24,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 14:15:24,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 14:15:24,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 14:15:24,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 14:15:24,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 14:15:24,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 14:15:24,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 14:15:24,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 14:15:24,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 14:15:24,658 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 14:15:24,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 14:15:24,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 14:15:24,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 14:15:24,661 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 14:15:24,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 14:15:24,662 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 14:15:24,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 14:15:24,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 14:15:24,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 14:15:24,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 14:15:24,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 14:15:24,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 14:15:24,664 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 14:15:24,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 14:15:24,664 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 14:15:24,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 14:15:24,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 14:15:24,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 14:15:24,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 14:15:24,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 14:15:24,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:15:24,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 14:15:24,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 14:15:24,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 14:15:24,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 14:15:24,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 14:15:24,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 14:15:24,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 14:15:24,994 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 14:15:25,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 14:15:25,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 14:15:25,013 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 14:15:25,013 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 14:15:25,014 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product18.cil.c [2019-10-07 14:15:25,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24601c446/d7e45b2db6364c629dc07808c1740804/FLAG03bfb3640 [2019-10-07 14:15:25,732 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 14:15:25,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product18.cil.c [2019-10-07 14:15:25,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24601c446/d7e45b2db6364c629dc07808c1740804/FLAG03bfb3640 [2019-10-07 14:15:25,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24601c446/d7e45b2db6364c629dc07808c1740804 [2019-10-07 14:15:25,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 14:15:25,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 14:15:25,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 14:15:25,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 14:15:25,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 14:15:25,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:15:25" (1/1) ... [2019-10-07 14:15:25,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd28435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:25, skipping insertion in model container [2019-10-07 14:15:25,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:15:25" (1/1) ... [2019-10-07 14:15:26,004 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 14:15:26,085 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 14:15:26,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:15:26,866 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 14:15:27,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:15:27,112 INFO L192 MainTranslator]: Completed translation [2019-10-07 14:15:27,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27 WrapperNode [2019-10-07 14:15:27,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 14:15:27,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 14:15:27,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 14:15:27,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 14:15:27,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... [2019-10-07 14:15:27,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 14:15:27,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 14:15:27,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 14:15:27,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 14:15:27,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:15:27,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 14:15:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 14:15:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-07 14:15:27,398 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-07 14:15:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-07 14:15:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-07 14:15:27,399 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-07 14:15:27,400 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-07 14:15:27,400 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-07 14:15:27,400 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-07 14:15:27,400 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-07 14:15:27,401 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-07 14:15:27,401 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-07 14:15:27,401 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-07 14:15:27,401 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-07 14:15:27,402 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-07 14:15:27,402 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-07 14:15:27,402 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-07 14:15:27,402 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-07 14:15:27,403 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-07 14:15:27,403 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-07 14:15:27,403 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-07 14:15:27,404 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-07 14:15:27,404 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-07 14:15:27,404 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-07 14:15:27,404 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-07 14:15:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-07 14:15:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-07 14:15:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-07 14:15:27,405 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-07 14:15:27,406 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-07 14:15:27,406 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-07 14:15:27,406 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-07 14:15:27,406 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-07 14:15:27,406 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-07 14:15:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2019-10-07 14:15:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-07 14:15:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2019-10-07 14:15:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-07 14:15:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-07 14:15:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-07 14:15:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-07 14:15:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-07 14:15:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-07 14:15:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-07 14:15:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-07 14:15:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-07 14:15:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-07 14:15:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-07 14:15:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-07 14:15:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-07 14:15:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-07 14:15:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-07 14:15:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-07 14:15:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-07 14:15:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-07 14:15:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-07 14:15:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-07 14:15:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-07 14:15:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-07 14:15:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-07 14:15:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-07 14:15:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-07 14:15:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 14:15:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-07 14:15:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-07 14:15:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-07 14:15:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-07 14:15:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-07 14:15:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-07 14:15:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-07 14:15:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-07 14:15:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-07 14:15:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-07 14:15:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-07 14:15:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-07 14:15:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 14:15:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 14:15:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-07 14:15:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-07 14:15:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-07 14:15:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-07 14:15:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-07 14:15:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-07 14:15:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-07 14:15:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-07 14:15:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-07 14:15:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-07 14:15:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-07 14:15:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-07 14:15:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-07 14:15:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-07 14:15:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-07 14:15:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-07 14:15:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-07 14:15:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-07 14:15:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-07 14:15:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-07 14:15:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-07 14:15:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-07 14:15:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-07 14:15:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-07 14:15:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-07 14:15:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-07 14:15:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-07 14:15:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-07 14:15:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-07 14:15:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-07 14:15:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-07 14:15:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-07 14:15:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-07 14:15:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-07 14:15:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-07 14:15:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-07 14:15:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-07 14:15:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-07 14:15:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-07 14:15:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-07 14:15:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-07 14:15:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-07 14:15:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-07 14:15:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-07 14:15:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-07 14:15:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2019-10-07 14:15:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-07 14:15:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2019-10-07 14:15:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 14:15:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-07 14:15:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 14:15:27,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 14:15:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 14:15:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-07 14:15:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 14:15:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-07 14:15:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-07 14:15:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 14:15:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-07 14:15:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-07 14:15:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-07 14:15:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 14:15:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-07 14:15:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-07 14:15:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-07 14:15:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-07 14:15:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-07 14:15:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-07 14:15:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-07 14:15:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-07 14:15:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-07 14:15:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-07 14:15:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-07 14:15:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-07 14:15:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-07 14:15:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-07 14:15:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-07 14:15:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-07 14:15:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 14:15:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-07 14:15:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 14:15:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 14:15:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 14:15:32,524 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 14:15:32,524 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 14:15:32,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:15:32 BoogieIcfgContainer [2019-10-07 14:15:32,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 14:15:32,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 14:15:32,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 14:15:32,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 14:15:32,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:15:25" (1/3) ... [2019-10-07 14:15:32,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a2b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:15:32, skipping insertion in model container [2019-10-07 14:15:32,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:15:27" (2/3) ... [2019-10-07 14:15:32,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a2b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:15:32, skipping insertion in model container [2019-10-07 14:15:32,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:15:32" (3/3) ... [2019-10-07 14:15:32,535 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2019-10-07 14:15:32,545 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 14:15:32,555 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 14:15:32,567 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 14:15:32,602 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 14:15:32,602 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 14:15:32,602 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 14:15:32,602 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 14:15:32,602 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 14:15:32,603 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 14:15:32,603 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 14:15:32,603 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 14:15:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states. [2019-10-07 14:15:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-07 14:15:32,653 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:32,655 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:32,657 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:32,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1802026042, now seen corresponding path program 1 times [2019-10-07 14:15:32,673 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:32,673 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:32,674 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:32,674 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:33,308 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:33,309 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:33,309 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 14:15:33,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 14:15:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 14:15:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 14:15:33,331 INFO L87 Difference]: Start difference. First operand 557 states. Second operand 2 states. [2019-10-07 14:15:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:33,400 INFO L93 Difference]: Finished difference Result 454 states and 681 transitions. [2019-10-07 14:15:33,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 14:15:33,401 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 74 [2019-10-07 14:15:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:33,426 INFO L225 Difference]: With dead ends: 454 [2019-10-07 14:15:33,426 INFO L226 Difference]: Without dead ends: 420 [2019-10-07 14:15:33,431 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 14:15:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-10-07 14:15:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2019-10-07 14:15:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-07 14:15:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 630 transitions. [2019-10-07 14:15:33,535 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 630 transitions. Word has length 74 [2019-10-07 14:15:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:33,537 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 630 transitions. [2019-10-07 14:15:33,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 14:15:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 630 transitions. [2019-10-07 14:15:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-07 14:15:33,544 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:33,544 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:33,544 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 51124958, now seen corresponding path program 1 times [2019-10-07 14:15:33,545 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:33,545 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:33,545 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:33,546 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:33,855 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:33,855 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:33,856 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 14:15:33,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:15:33,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:15:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 14:15:33,864 INFO L87 Difference]: Start difference. First operand 420 states and 630 transitions. Second operand 6 states. [2019-10-07 14:15:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:36,947 INFO L93 Difference]: Finished difference Result 1285 states and 1996 transitions. [2019-10-07 14:15:36,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:15:36,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2019-10-07 14:15:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:36,963 INFO L225 Difference]: With dead ends: 1285 [2019-10-07 14:15:36,964 INFO L226 Difference]: Without dead ends: 907 [2019-10-07 14:15:36,970 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:15:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2019-10-07 14:15:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 814. [2019-10-07 14:15:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-07 14:15:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1267 transitions. [2019-10-07 14:15:37,081 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1267 transitions. Word has length 75 [2019-10-07 14:15:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:37,088 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1267 transitions. [2019-10-07 14:15:37,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:15:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1267 transitions. [2019-10-07 14:15:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-07 14:15:37,099 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:37,099 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:37,100 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2067693136, now seen corresponding path program 1 times [2019-10-07 14:15:37,102 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:37,102 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:37,102 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:37,102 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:37,450 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:37,450 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:37,451 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-07 14:15:37,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-07 14:15:37,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-07 14:15:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:15:37,453 INFO L87 Difference]: Start difference. First operand 814 states and 1267 transitions. Second operand 12 states. [2019-10-07 14:15:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:44,858 INFO L93 Difference]: Finished difference Result 2432 states and 3817 transitions. [2019-10-07 14:15:44,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-07 14:15:44,859 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 102 [2019-10-07 14:15:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:44,887 INFO L225 Difference]: With dead ends: 2432 [2019-10-07 14:15:44,887 INFO L226 Difference]: Without dead ends: 1660 [2019-10-07 14:15:44,900 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-10-07 14:15:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2019-10-07 14:15:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1601. [2019-10-07 14:15:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1601 states. [2019-10-07 14:15:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2497 transitions. [2019-10-07 14:15:45,096 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2497 transitions. Word has length 102 [2019-10-07 14:15:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:45,097 INFO L462 AbstractCegarLoop]: Abstraction has 1601 states and 2497 transitions. [2019-10-07 14:15:45,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-07 14:15:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2497 transitions. [2019-10-07 14:15:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-07 14:15:45,105 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:45,106 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:45,106 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1938272702, now seen corresponding path program 1 times [2019-10-07 14:15:45,107 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:45,107 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:45,108 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:45,108 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:45,417 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:45,417 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:45,417 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-07 14:15:45,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 14:15:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 14:15:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:15:45,421 INFO L87 Difference]: Start difference. First operand 1601 states and 2497 transitions. Second operand 8 states. [2019-10-07 14:15:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:45,598 INFO L93 Difference]: Finished difference Result 3440 states and 5450 transitions. [2019-10-07 14:15:45,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 14:15:45,599 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2019-10-07 14:15:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:45,619 INFO L225 Difference]: With dead ends: 3440 [2019-10-07 14:15:45,620 INFO L226 Difference]: Without dead ends: 1883 [2019-10-07 14:15:45,632 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:15:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2019-10-07 14:15:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1625. [2019-10-07 14:15:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1625 states. [2019-10-07 14:15:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2521 transitions. [2019-10-07 14:15:45,803 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2521 transitions. Word has length 103 [2019-10-07 14:15:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:45,804 INFO L462 AbstractCegarLoop]: Abstraction has 1625 states and 2521 transitions. [2019-10-07 14:15:45,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 14:15:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2521 transitions. [2019-10-07 14:15:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-07 14:15:45,809 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:45,810 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:45,810 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1156112179, now seen corresponding path program 1 times [2019-10-07 14:15:45,811 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:45,811 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:45,812 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:45,812 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:46,135 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:46,136 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:46,136 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:15:46,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:15:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:15:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:15:46,138 INFO L87 Difference]: Start difference. First operand 1625 states and 2521 transitions. Second operand 7 states. [2019-10-07 14:15:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:49,806 INFO L93 Difference]: Finished difference Result 4452 states and 6996 transitions. [2019-10-07 14:15:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-07 14:15:49,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-07 14:15:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:49,832 INFO L225 Difference]: With dead ends: 4452 [2019-10-07 14:15:49,832 INFO L226 Difference]: Without dead ends: 2871 [2019-10-07 14:15:49,841 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:15:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2019-10-07 14:15:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2806. [2019-10-07 14:15:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2019-10-07 14:15:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4431 transitions. [2019-10-07 14:15:50,017 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4431 transitions. Word has length 107 [2019-10-07 14:15:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:50,017 INFO L462 AbstractCegarLoop]: Abstraction has 2806 states and 4431 transitions. [2019-10-07 14:15:50,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:15:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4431 transitions. [2019-10-07 14:15:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-07 14:15:50,023 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:50,023 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:50,023 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1331959084, now seen corresponding path program 1 times [2019-10-07 14:15:50,024 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:50,024 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:50,026 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:50,026 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:50,204 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:50,204 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:50,204 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:15:50,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:15:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:15:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:15:50,206 INFO L87 Difference]: Start difference. First operand 2806 states and 4431 transitions. Second operand 5 states. [2019-10-07 14:15:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:50,342 INFO L93 Difference]: Finished difference Result 4889 states and 7751 transitions. [2019-10-07 14:15:50,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:15:50,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-07 14:15:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:50,364 INFO L225 Difference]: With dead ends: 4889 [2019-10-07 14:15:50,365 INFO L226 Difference]: Without dead ends: 2870 [2019-10-07 14:15:50,375 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:15:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2019-10-07 14:15:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2846. [2019-10-07 14:15:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2846 states. [2019-10-07 14:15:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 4481 transitions. [2019-10-07 14:15:50,559 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 4481 transitions. Word has length 111 [2019-10-07 14:15:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:50,560 INFO L462 AbstractCegarLoop]: Abstraction has 2846 states and 4481 transitions. [2019-10-07 14:15:50,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:15:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 4481 transitions. [2019-10-07 14:15:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-07 14:15:50,565 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:50,565 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:50,566 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash 369379332, now seen corresponding path program 1 times [2019-10-07 14:15:50,566 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:50,566 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:50,567 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:50,567 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:50,840 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:50,840 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:50,840 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:15:50,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:15:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:15:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:15:50,843 INFO L87 Difference]: Start difference. First operand 2846 states and 4481 transitions. Second operand 7 states. [2019-10-07 14:15:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:54,523 INFO L93 Difference]: Finished difference Result 6776 states and 10686 transitions. [2019-10-07 14:15:54,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 14:15:54,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2019-10-07 14:15:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:54,560 INFO L225 Difference]: With dead ends: 6776 [2019-10-07 14:15:54,561 INFO L226 Difference]: Without dead ends: 4525 [2019-10-07 14:15:54,577 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-07 14:15:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2019-10-07 14:15:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4461. [2019-10-07 14:15:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4461 states. [2019-10-07 14:15:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 6870 transitions. [2019-10-07 14:15:54,926 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 6870 transitions. Word has length 115 [2019-10-07 14:15:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:54,926 INFO L462 AbstractCegarLoop]: Abstraction has 4461 states and 6870 transitions. [2019-10-07 14:15:54,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:15:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 6870 transitions. [2019-10-07 14:15:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-07 14:15:54,930 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:54,931 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:54,931 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash -97141019, now seen corresponding path program 1 times [2019-10-07 14:15:54,932 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:54,932 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:54,932 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:54,932 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:15:55,125 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:55,126 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:55,126 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:15:55,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:15:55,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:15:55,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:15:55,128 INFO L87 Difference]: Start difference. First operand 4461 states and 6870 transitions. Second operand 7 states. [2019-10-07 14:15:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:55,431 INFO L93 Difference]: Finished difference Result 8867 states and 13964 transitions. [2019-10-07 14:15:55,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:15:55,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-10-07 14:15:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:55,461 INFO L225 Difference]: With dead ends: 8867 [2019-10-07 14:15:55,462 INFO L226 Difference]: Without dead ends: 4461 [2019-10-07 14:15:55,484 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:15:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2019-10-07 14:15:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 4461. [2019-10-07 14:15:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4461 states. [2019-10-07 14:15:55,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 6750 transitions. [2019-10-07 14:15:55,740 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 6750 transitions. Word has length 118 [2019-10-07 14:15:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:15:55,742 INFO L462 AbstractCegarLoop]: Abstraction has 4461 states and 6750 transitions. [2019-10-07 14:15:55,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:15:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 6750 transitions. [2019-10-07 14:15:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-07 14:15:55,747 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:15:55,747 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:15:55,747 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:15:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:15:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1956552649, now seen corresponding path program 1 times [2019-10-07 14:15:55,748 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:15:55,748 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:55,748 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:55,749 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:15:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:15:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:15:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:15:55,982 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:15:55,982 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:15:55,982 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:15:55,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:15:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:15:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:15:55,984 INFO L87 Difference]: Start difference. First operand 4461 states and 6750 transitions. Second operand 7 states. [2019-10-07 14:15:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:15:59,889 INFO L93 Difference]: Finished difference Result 8424 states and 12762 transitions. [2019-10-07 14:15:59,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-07 14:15:59,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-10-07 14:15:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:15:59,959 INFO L225 Difference]: With dead ends: 8424 [2019-10-07 14:15:59,959 INFO L226 Difference]: Without dead ends: 4672 [2019-10-07 14:15:59,985 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:15:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2019-10-07 14:16:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 4551. [2019-10-07 14:16:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4551 states. [2019-10-07 14:16:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 6864 transitions. [2019-10-07 14:16:00,356 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 6864 transitions. Word has length 120 [2019-10-07 14:16:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:16:00,357 INFO L462 AbstractCegarLoop]: Abstraction has 4551 states and 6864 transitions. [2019-10-07 14:16:00,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:16:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 6864 transitions. [2019-10-07 14:16:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-07 14:16:00,367 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:16:00,369 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:16:00,370 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:16:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:16:00,370 INFO L82 PathProgramCache]: Analyzing trace with hash -758820956, now seen corresponding path program 1 times [2019-10-07 14:16:00,371 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:16:00,371 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:00,371 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:00,372 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:16:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:16:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:16:00,665 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:00,665 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:16:00,666 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:16:00,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:16:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:16:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:16:00,668 INFO L87 Difference]: Start difference. First operand 4551 states and 6864 transitions. Second operand 4 states. [2019-10-07 14:16:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:16:02,744 INFO L93 Difference]: Finished difference Result 11734 states and 18082 transitions. [2019-10-07 14:16:02,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:16:02,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-07 14:16:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:16:02,787 INFO L225 Difference]: With dead ends: 11734 [2019-10-07 14:16:02,788 INFO L226 Difference]: Without dead ends: 7225 [2019-10-07 14:16:02,810 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:16:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2019-10-07 14:16:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 7018. [2019-10-07 14:16:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7018 states. [2019-10-07 14:16:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7018 states to 7018 states and 10703 transitions. [2019-10-07 14:16:03,196 INFO L78 Accepts]: Start accepts. Automaton has 7018 states and 10703 transitions. Word has length 127 [2019-10-07 14:16:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:16:03,199 INFO L462 AbstractCegarLoop]: Abstraction has 7018 states and 10703 transitions. [2019-10-07 14:16:03,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:16:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 7018 states and 10703 transitions. [2019-10-07 14:16:03,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-07 14:16:03,205 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:16:03,205 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:16:03,205 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:16:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:16:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1129175885, now seen corresponding path program 1 times [2019-10-07 14:16:03,206 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:16:03,207 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:03,207 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:03,207 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:16:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:16:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:16:03,415 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:03,416 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:16:03,416 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:16:03,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:16:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:16:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:16:03,417 INFO L87 Difference]: Start difference. First operand 7018 states and 10703 transitions. Second operand 4 states. [2019-10-07 14:16:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:16:05,267 INFO L93 Difference]: Finished difference Result 19193 states and 30300 transitions. [2019-10-07 14:16:05,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:16:05,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-07 14:16:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:16:05,335 INFO L225 Difference]: With dead ends: 19193 [2019-10-07 14:16:05,336 INFO L226 Difference]: Without dead ends: 12218 [2019-10-07 14:16:05,364 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:16:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12218 states. [2019-10-07 14:16:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12218 to 11938. [2019-10-07 14:16:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11938 states. [2019-10-07 14:16:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11938 states to 11938 states and 18573 transitions. [2019-10-07 14:16:06,229 INFO L78 Accepts]: Start accepts. Automaton has 11938 states and 18573 transitions. Word has length 125 [2019-10-07 14:16:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:16:06,229 INFO L462 AbstractCegarLoop]: Abstraction has 11938 states and 18573 transitions. [2019-10-07 14:16:06,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:16:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 11938 states and 18573 transitions. [2019-10-07 14:16:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-07 14:16:06,234 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:16:06,235 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:16:06,235 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:16:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:16:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash 875823878, now seen corresponding path program 1 times [2019-10-07 14:16:06,236 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:16:06,236 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:06,236 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:06,236 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:16:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:16:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:16:06,400 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:06,400 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:16:06,400 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:16:06,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:16:06,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:16:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:16:06,402 INFO L87 Difference]: Start difference. First operand 11938 states and 18573 transitions. Second operand 4 states. [2019-10-07 14:16:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:16:09,381 INFO L93 Difference]: Finished difference Result 34158 states and 56231 transitions. [2019-10-07 14:16:09,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:16:09,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-07 14:16:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:16:09,485 INFO L225 Difference]: With dead ends: 34158 [2019-10-07 14:16:09,485 INFO L226 Difference]: Without dead ends: 22265 [2019-10-07 14:16:09,522 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:16:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22265 states. [2019-10-07 14:16:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22265 to 21840. [2019-10-07 14:16:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21840 states. [2019-10-07 14:16:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21840 states to 21840 states and 35193 transitions. [2019-10-07 14:16:10,811 INFO L78 Accepts]: Start accepts. Automaton has 21840 states and 35193 transitions. Word has length 129 [2019-10-07 14:16:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:16:10,813 INFO L462 AbstractCegarLoop]: Abstraction has 21840 states and 35193 transitions. [2019-10-07 14:16:10,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:16:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21840 states and 35193 transitions. [2019-10-07 14:16:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-07 14:16:10,817 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:16:10,817 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:16:10,818 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:16:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:16:10,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1447147669, now seen corresponding path program 1 times [2019-10-07 14:16:10,818 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:16:10,819 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:10,819 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:10,819 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:16:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:16:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:16:11,007 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:11,007 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:16:11,007 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:16:11,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:16:11,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:16:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:16:11,010 INFO L87 Difference]: Start difference. First operand 21840 states and 35193 transitions. Second operand 4 states. [2019-10-07 14:16:11,312 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2019-10-07 14:16:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:16:14,036 INFO L93 Difference]: Finished difference Result 64251 states and 113208 transitions. [2019-10-07 14:16:14,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:16:14,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-07 14:16:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:16:14,321 INFO L225 Difference]: With dead ends: 64251 [2019-10-07 14:16:14,322 INFO L226 Difference]: Without dead ends: 42460 [2019-10-07 14:16:14,401 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:16:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42460 states. [2019-10-07 14:16:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42460 to 41746. [2019-10-07 14:16:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41746 states. [2019-10-07 14:16:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41746 states to 41746 states and 71289 transitions. [2019-10-07 14:16:18,011 INFO L78 Accepts]: Start accepts. Automaton has 41746 states and 71289 transitions. Word has length 127 [2019-10-07 14:16:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:16:18,012 INFO L462 AbstractCegarLoop]: Abstraction has 41746 states and 71289 transitions. [2019-10-07 14:16:18,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:16:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 41746 states and 71289 transitions. [2019-10-07 14:16:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-07 14:16:18,016 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:16:18,017 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:16:18,017 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:16:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:16:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash -188271000, now seen corresponding path program 1 times [2019-10-07 14:16:18,018 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:16:18,018 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:18,018 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:18,018 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:16:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:16:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:16:18,163 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:18,164 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:16:18,164 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 14:16:18,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:16:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:16:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 14:16:18,165 INFO L87 Difference]: Start difference. First operand 41746 states and 71289 transitions. Second operand 4 states. [2019-10-07 14:16:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:16:22,586 INFO L93 Difference]: Finished difference Result 124901 states and 244497 transitions. [2019-10-07 14:16:22,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:16:22,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-07 14:16:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:16:23,205 INFO L225 Difference]: With dead ends: 124901 [2019-10-07 14:16:23,206 INFO L226 Difference]: Without dead ends: 83200 [2019-10-07 14:16:23,363 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:16:23,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83200 states. [2019-10-07 14:16:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83200 to 81021. [2019-10-07 14:16:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81021 states. [2019-10-07 14:16:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81021 states to 81021 states and 148235 transitions. [2019-10-07 14:16:30,242 INFO L78 Accepts]: Start accepts. Automaton has 81021 states and 148235 transitions. Word has length 131 [2019-10-07 14:16:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:16:30,243 INFO L462 AbstractCegarLoop]: Abstraction has 81021 states and 148235 transitions. [2019-10-07 14:16:30,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:16:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 81021 states and 148235 transitions. [2019-10-07 14:16:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-07 14:16:30,253 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:16:30,253 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:16:30,254 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:16:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:16:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash -573966570, now seen corresponding path program 1 times [2019-10-07 14:16:30,254 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:16:30,254 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:30,255 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:30,255 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:16:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:16:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:16:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-07 14:16:31,063 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:16:31,063 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:16:31,063 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:16:31,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:16:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:16:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:16:31,065 INFO L87 Difference]: Start difference. First operand 81021 states and 148235 transitions. Second operand 5 states. [2019-10-07 14:16:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:16:43,705 INFO L93 Difference]: Finished difference Result 264812 states and 519291 transitions. [2019-10-07 14:16:43,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:16:43,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2019-10-07 14:16:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:16:44,747 INFO L225 Difference]: With dead ends: 264812 [2019-10-07 14:16:44,747 INFO L226 Difference]: Without dead ends: 183834 [2019-10-07 14:16:44,964 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:16:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183834 states. [2019-10-07 14:16:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183834 to 179779. [2019-10-07 14:16:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179779 states. [2019-10-07 14:17:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179779 states to 179779 states and 345446 transitions. [2019-10-07 14:17:01,028 INFO L78 Accepts]: Start accepts. Automaton has 179779 states and 345446 transitions. Word has length 197 [2019-10-07 14:17:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:17:01,029 INFO L462 AbstractCegarLoop]: Abstraction has 179779 states and 345446 transitions. [2019-10-07 14:17:01,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:17:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 179779 states and 345446 transitions. [2019-10-07 14:17:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-07 14:17:01,037 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:17:01,038 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:17:01,038 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:17:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:17:01,038 INFO L82 PathProgramCache]: Analyzing trace with hash 581140850, now seen corresponding path program 1 times [2019-10-07 14:17:01,038 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:17:01,039 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:17:01,039 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:17:01,039 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:17:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:17:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:17:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-07 14:17:01,209 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:17:01,209 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:17:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:17:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:17:02,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 3656 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:17:02,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:17:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-07 14:17:02,295 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:17:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-07 14:17:02,860 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:17:02,860 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-07 14:17:02,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:17:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:17:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:17:02,862 INFO L87 Difference]: Start difference. First operand 179779 states and 345446 transitions. Second operand 4 states. [2019-10-07 14:17:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:17:18,177 INFO L93 Difference]: Finished difference Result 370864 states and 759787 transitions. [2019-10-07 14:17:18,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:17:18,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-10-07 14:17:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:17:19,682 INFO L225 Difference]: With dead ends: 370864 [2019-10-07 14:17:19,683 INFO L226 Difference]: Without dead ends: 191128 [2019-10-07 14:17:20,214 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:17:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191128 states. [2019-10-07 14:17:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191128 to 191128. [2019-10-07 14:17:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191128 states. [2019-10-07 14:17:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191128 states to 191128 states and 366689 transitions. [2019-10-07 14:17:41,181 INFO L78 Accepts]: Start accepts. Automaton has 191128 states and 366689 transitions. Word has length 182 [2019-10-07 14:17:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:17:41,182 INFO L462 AbstractCegarLoop]: Abstraction has 191128 states and 366689 transitions. [2019-10-07 14:17:41,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:17:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 191128 states and 366689 transitions. [2019-10-07 14:17:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-07 14:17:41,197 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:17:41,197 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:17:41,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:17:41,407 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:17:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:17:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1923316378, now seen corresponding path program 1 times [2019-10-07 14:17:41,407 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:17:41,408 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:17:41,408 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:17:41,408 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:17:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:17:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:17:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-07 14:17:41,667 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:17:41,668 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:17:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:17:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:17:42,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 3661 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:17:42,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:17:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-07 14:17:42,548 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:17:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-07 14:17:43,017 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:17:43,017 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-07 14:17:43,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:17:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:17:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:17:43,019 INFO L87 Difference]: Start difference. First operand 191128 states and 366689 transitions. Second operand 4 states. [2019-10-07 14:17:55,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:17:55,663 INFO L93 Difference]: Finished difference Result 393562 states and 801976 transitions. [2019-10-07 14:17:55,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:17:55,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 187 [2019-10-07 14:17:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:18:02,536 INFO L225 Difference]: With dead ends: 393562 [2019-10-07 14:18:02,536 INFO L226 Difference]: Without dead ends: 202477 [2019-10-07 14:18:02,965 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 371 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:18:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202477 states. [2019-10-07 14:18:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202477 to 202477. [2019-10-07 14:18:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202477 states. [2019-10-07 14:18:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202477 states to 202477 states and 387932 transitions. [2019-10-07 14:18:13,901 INFO L78 Accepts]: Start accepts. Automaton has 202477 states and 387932 transitions. Word has length 187 [2019-10-07 14:18:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:18:13,902 INFO L462 AbstractCegarLoop]: Abstraction has 202477 states and 387932 transitions. [2019-10-07 14:18:13,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:18:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 202477 states and 387932 transitions. [2019-10-07 14:18:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-07 14:18:13,912 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:18:13,913 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:18:14,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:18:14,122 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:18:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:18:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1322629866, now seen corresponding path program 1 times [2019-10-07 14:18:14,123 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:18:14,123 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:18:14,123 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:18:14,123 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:18:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:18:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:18:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-07 14:18:14,379 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:18:14,380 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:18:14,380 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:18:14,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:18:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:18:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:18:14,386 INFO L87 Difference]: Start difference. First operand 202477 states and 387932 transitions. Second operand 5 states. [2019-10-07 14:18:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:18:46,081 INFO L93 Difference]: Finished difference Result 636805 states and 1332908 transitions. [2019-10-07 14:18:46,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:18:46,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2019-10-07 14:18:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:18:49,171 INFO L225 Difference]: With dead ends: 636805 [2019-10-07 14:18:49,171 INFO L226 Difference]: Without dead ends: 434371 [2019-10-07 14:18:49,628 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:18:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434371 states. [2019-10-07 14:19:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434371 to 425880. [2019-10-07 14:19:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425880 states. [2019-10-07 14:19:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425880 states to 425880 states and 867271 transitions. [2019-10-07 14:19:39,877 INFO L78 Accepts]: Start accepts. Automaton has 425880 states and 867271 transitions. Word has length 206 [2019-10-07 14:19:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:19:39,878 INFO L462 AbstractCegarLoop]: Abstraction has 425880 states and 867271 transitions. [2019-10-07 14:19:39,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:19:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 425880 states and 867271 transitions. [2019-10-07 14:19:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-07 14:19:39,887 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:19:39,887 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:19:39,887 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:19:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:19:39,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2046116316, now seen corresponding path program 1 times [2019-10-07 14:19:39,888 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:19:39,888 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:39,888 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:39,888 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:19:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:19:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:19:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-07 14:19:40,097 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:19:40,097 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:19:40,097 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:19:40,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:19:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:19:40,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:19:40,099 INFO L87 Difference]: Start difference. First operand 425880 states and 867271 transitions. Second operand 5 states. [2019-10-07 14:20:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:20:59,415 INFO L93 Difference]: Finished difference Result 1337615 states and 3059424 transitions. [2019-10-07 14:20:59,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:20:59,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2019-10-07 14:20:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:21:22,528 INFO L225 Difference]: With dead ends: 1337615 [2019-10-07 14:21:22,528 INFO L226 Difference]: Without dead ends: 911778 [2019-10-07 14:21:25,627 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:21:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911778 states.