java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:01:51,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:01:51,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:01:51,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:01:51,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:01:51,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:01:51,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:01:51,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:01:51,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:01:51,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:01:51,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:01:51,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:01:51,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:01:51,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:01:51,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:01:51,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:01:51,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:01:51,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:01:51,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:01:51,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:01:51,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:01:51,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:01:51,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:01:51,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:01:51,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:01:51,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:01:51,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:01:51,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:01:51,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:01:51,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:01:51,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:01:51,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:01:51,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:01:51,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:01:51,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:01:51,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:01:51,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:01:51,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:01:51,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:01:51,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:01:51,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:01:51,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:01:51,529 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:01:51,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:01:51,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:01:51,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:01:51,533 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:01:51,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:01:51,533 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:01:51,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:01:51,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:01:51,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:01:51,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:01:51,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:01:51,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:01:51,535 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:01:51,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:01:51,536 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:01:51,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:01:51,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:01:51,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:01:51,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:01:51,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:01:51,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:51,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:01:51,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:01:51,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:01:51,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:01:51,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:01:51,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:01:51,539 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 [2019-10-13 23:01:51,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:01:51,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:01:51,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:01:51,926 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:01:51,928 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:01:51,929 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c [2019-10-13 23:01:52,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d3a10914/879738236f184adab82db49d0661f4cb/FLAG0c904026b [2019-10-13 23:01:52,700 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:01:52,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product30.cil.c [2019-10-13 23:01:52,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d3a10914/879738236f184adab82db49d0661f4cb/FLAG0c904026b [2019-10-13 23:01:52,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d3a10914/879738236f184adab82db49d0661f4cb [2019-10-13 23:01:52,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:01:52,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:01:52,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:52,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:01:52,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:01:52,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:52" (1/1) ... [2019-10-13 23:01:52,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6228bf37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:52, skipping insertion in model container [2019-10-13 23:01:52,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:52" (1/1) ... [2019-10-13 23:01:52,911 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:01:53,001 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:01:53,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:53,771 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:01:53,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:53,997 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:01:53,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53 WrapperNode [2019-10-13 23:01:53,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:53,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:01:53,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:01:53,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:01:54,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... [2019-10-13 23:01:54,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:01:54,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:01:54,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:01:54,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:01:54,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:54,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:01:54,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:01:54,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:54,332 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:01:54,332 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:01:54,332 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:01:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:01:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:01:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:01:54,333 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:01:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:01:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:01:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:01:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:01:54,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:54,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:54,335 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:01:54,335 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:01:54,336 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:01:54,336 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:01:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:01:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:01:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:01:54,337 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:01:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:01:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:01:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:01:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:01:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:01:54,338 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:01:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:01:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:01:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:01:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:01:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:01:54,340 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:01:54,340 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:01:54,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:01:54,340 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:01:54,340 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:01:54,340 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:01:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:01:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:01:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:01:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:01:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:01:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:01:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:01:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:01:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:01:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:01:54,342 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:01:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:01:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:01:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:01:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:01:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:01:54,343 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:01:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:01:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-13 23:01:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:01:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-13 23:01:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:01:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:01:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:01:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:01:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:01:54,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:01:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:01:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:01:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:01:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:01:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:01:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:01:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:01:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:01:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:01:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:01:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:01:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:01:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:01:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:01:54,354 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:01:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:01:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:01:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:01:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:01:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:01:54,355 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:01:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:01:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:01:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:01:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:01:54,357 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:01:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:01:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:01:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:01:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:01:54,358 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:01:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:01:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:01:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:01:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:01:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:54,359 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:01:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:01:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-13 23:01:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-13 23:01:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:01:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:01:54,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:01:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:01:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:01:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:01:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:01:54,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:01:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:01:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:01:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:54,362 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:01:54,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:01:59,193 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:01:59,193 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:01:59,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:59 BoogieIcfgContainer [2019-10-13 23:01:59,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:01:59,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:01:59,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:01:59,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:01:59,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:01:52" (1/3) ... [2019-10-13 23:01:59,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be5f974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:59, skipping insertion in model container [2019-10-13 23:01:59,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:53" (2/3) ... [2019-10-13 23:01:59,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be5f974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:59, skipping insertion in model container [2019-10-13 23:01:59,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:59" (3/3) ... [2019-10-13 23:01:59,204 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2019-10-13 23:01:59,215 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:01:59,224 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:01:59,236 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:01:59,277 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:01:59,277 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:01:59,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:01:59,277 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:01:59,278 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:01:59,278 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:01:59,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:01:59,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:01:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states. [2019-10-13 23:01:59,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 23:01:59,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:59,339 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:59,341 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1446989103, now seen corresponding path program 1 times [2019-10-13 23:01:59,358 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:59,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68217137] [2019-10-13 23:01:59,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:59,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:59,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:02:00,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68217137] [2019-10-13 23:02:00,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695386080] [2019-10-13 23:02:00,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:00,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:02:00,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:02:01,045 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:01,239 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:01,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 23:02:01,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002734404] [2019-10-13 23:02:01,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:01,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:01,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:01,264 INFO L87 Difference]: Start difference. First operand 611 states. Second operand 4 states. [2019-10-13 23:02:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:02,333 INFO L93 Difference]: Finished difference Result 1866 states and 2887 transitions. [2019-10-13 23:02:02,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:02,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2019-10-13 23:02:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:02,366 INFO L225 Difference]: With dead ends: 1866 [2019-10-13 23:02:02,366 INFO L226 Difference]: Without dead ends: 1374 [2019-10-13 23:02:02,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2019-10-13 23:02:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1282. [2019-10-13 23:02:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2019-10-13 23:02:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1964 transitions. [2019-10-13 23:02:02,638 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1964 transitions. Word has length 95 [2019-10-13 23:02:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:02,639 INFO L462 AbstractCegarLoop]: Abstraction has 1282 states and 1964 transitions. [2019-10-13 23:02:02,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1964 transitions. [2019-10-13 23:02:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 23:02:02,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:02,658 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:02,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:02,866 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1536710755, now seen corresponding path program 1 times [2019-10-13 23:02:02,868 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:02,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665612991] [2019-10-13 23:02:02,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:02,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:02,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:03,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665612991] [2019-10-13 23:02:03,362 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:03,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:02:03,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500795037] [2019-10-13 23:02:03,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:02:03,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:02:03,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:03,370 INFO L87 Difference]: Start difference. First operand 1282 states and 1964 transitions. Second operand 10 states. [2019-10-13 23:02:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:04,716 INFO L93 Difference]: Finished difference Result 2724 states and 4187 transitions. [2019-10-13 23:02:04,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 23:02:04,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2019-10-13 23:02:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:04,731 INFO L225 Difference]: With dead ends: 2724 [2019-10-13 23:02:04,732 INFO L226 Difference]: Without dead ends: 1479 [2019-10-13 23:02:04,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-13 23:02:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2019-10-13 23:02:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1471. [2019-10-13 23:02:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2019-10-13 23:02:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2234 transitions. [2019-10-13 23:02:04,902 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2234 transitions. Word has length 136 [2019-10-13 23:02:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:04,903 INFO L462 AbstractCegarLoop]: Abstraction has 1471 states and 2234 transitions. [2019-10-13 23:02:04,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:02:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2234 transitions. [2019-10-13 23:02:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 23:02:04,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:04,908 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:04,908 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1792045812, now seen corresponding path program 1 times [2019-10-13 23:02:04,909 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:04,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847628825] [2019-10-13 23:02:04,909 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:04,909 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:04,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:05,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847628825] [2019-10-13 23:02:05,186 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:05,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:05,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392893707] [2019-10-13 23:02:05,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:05,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:05,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:05,188 INFO L87 Difference]: Start difference. First operand 1471 states and 2234 transitions. Second operand 9 states. [2019-10-13 23:02:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:11,249 INFO L93 Difference]: Finished difference Result 4369 states and 6726 transitions. [2019-10-13 23:02:11,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 23:02:11,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-10-13 23:02:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:11,285 INFO L225 Difference]: With dead ends: 4369 [2019-10-13 23:02:11,286 INFO L226 Difference]: Without dead ends: 2938 [2019-10-13 23:02:11,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2019-10-13 23:02:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2019-10-13 23:02:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2822. [2019-10-13 23:02:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2822 states. [2019-10-13 23:02:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 4344 transitions. [2019-10-13 23:02:11,547 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 4344 transitions. Word has length 137 [2019-10-13 23:02:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:11,548 INFO L462 AbstractCegarLoop]: Abstraction has 2822 states and 4344 transitions. [2019-10-13 23:02:11,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 4344 transitions. [2019-10-13 23:02:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:02:11,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:11,558 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:11,558 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:11,559 INFO L82 PathProgramCache]: Analyzing trace with hash 173874336, now seen corresponding path program 1 times [2019-10-13 23:02:11,559 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:11,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086625112] [2019-10-13 23:02:11,560 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:11,560 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:11,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:11,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086625112] [2019-10-13 23:02:11,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:11,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:11,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600176333] [2019-10-13 23:02:11,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:11,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:11,920 INFO L87 Difference]: Start difference. First operand 2822 states and 4344 transitions. Second operand 7 states. [2019-10-13 23:02:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:12,201 INFO L93 Difference]: Finished difference Result 4597 states and 7148 transitions. [2019-10-13 23:02:12,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:02:12,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-13 23:02:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:12,226 INFO L225 Difference]: With dead ends: 4597 [2019-10-13 23:02:12,227 INFO L226 Difference]: Without dead ends: 2892 [2019-10-13 23:02:12,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2019-10-13 23:02:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2864. [2019-10-13 23:02:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 23:02:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4404 transitions. [2019-10-13 23:02:12,391 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4404 transitions. Word has length 141 [2019-10-13 23:02:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:12,392 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4404 transitions. [2019-10-13 23:02:12,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4404 transitions. [2019-10-13 23:02:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 23:02:12,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:12,398 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:12,398 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1741600244, now seen corresponding path program 1 times [2019-10-13 23:02:12,399 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:12,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553381150] [2019-10-13 23:02:12,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:12,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553381150] [2019-10-13 23:02:12,597 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:12,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:12,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844595041] [2019-10-13 23:02:12,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:12,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:12,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:12,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:12,599 INFO L87 Difference]: Start difference. First operand 2864 states and 4404 transitions. Second operand 7 states. [2019-10-13 23:02:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:12,733 INFO L93 Difference]: Finished difference Result 4655 states and 7224 transitions. [2019-10-13 23:02:12,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:02:12,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-10-13 23:02:12,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:12,764 INFO L225 Difference]: With dead ends: 4655 [2019-10-13 23:02:12,765 INFO L226 Difference]: Without dead ends: 2922 [2019-10-13 23:02:12,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2019-10-13 23:02:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2870. [2019-10-13 23:02:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2870 states. [2019-10-13 23:02:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 4410 transitions. [2019-10-13 23:02:12,955 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 4410 transitions. Word has length 142 [2019-10-13 23:02:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:12,956 INFO L462 AbstractCegarLoop]: Abstraction has 2870 states and 4410 transitions. [2019-10-13 23:02:12,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 4410 transitions. [2019-10-13 23:02:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 23:02:12,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:12,962 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:12,962 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash 756657108, now seen corresponding path program 1 times [2019-10-13 23:02:12,963 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:12,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297741081] [2019-10-13 23:02:12,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:13,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297741081] [2019-10-13 23:02:13,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:13,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:13,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377917616] [2019-10-13 23:02:13,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:13,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:13,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:13,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:13,175 INFO L87 Difference]: Start difference. First operand 2870 states and 4410 transitions. Second operand 7 states. [2019-10-13 23:02:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:13,307 INFO L93 Difference]: Finished difference Result 4665 states and 7234 transitions. [2019-10-13 23:02:13,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:02:13,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-10-13 23:02:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:13,332 INFO L225 Difference]: With dead ends: 4665 [2019-10-13 23:02:13,332 INFO L226 Difference]: Without dead ends: 2928 [2019-10-13 23:02:13,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2019-10-13 23:02:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 2876. [2019-10-13 23:02:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2876 states. [2019-10-13 23:02:13,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 4416 transitions. [2019-10-13 23:02:13,563 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 4416 transitions. Word has length 142 [2019-10-13 23:02:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:13,564 INFO L462 AbstractCegarLoop]: Abstraction has 2876 states and 4416 transitions. [2019-10-13 23:02:13,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:13,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 4416 transitions. [2019-10-13 23:02:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 23:02:13,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:13,575 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:13,575 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:13,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1275886392, now seen corresponding path program 1 times [2019-10-13 23:02:13,577 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:13,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765321184] [2019-10-13 23:02:13,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:13,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:13,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:13,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765321184] [2019-10-13 23:02:13,834 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:13,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:13,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920706188] [2019-10-13 23:02:13,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:13,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:13,835 INFO L87 Difference]: Start difference. First operand 2876 states and 4416 transitions. Second operand 7 states. [2019-10-13 23:02:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:17,595 INFO L93 Difference]: Finished difference Result 6498 states and 10201 transitions. [2019-10-13 23:02:17,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:02:17,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2019-10-13 23:02:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:17,632 INFO L225 Difference]: With dead ends: 6498 [2019-10-13 23:02:17,632 INFO L226 Difference]: Without dead ends: 4507 [2019-10-13 23:02:17,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2019-10-13 23:02:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 4307. [2019-10-13 23:02:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2019-10-13 23:02:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 6517 transitions. [2019-10-13 23:02:17,903 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 6517 transitions. Word has length 145 [2019-10-13 23:02:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:17,903 INFO L462 AbstractCegarLoop]: Abstraction has 4307 states and 6517 transitions. [2019-10-13 23:02:17,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 6517 transitions. [2019-10-13 23:02:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:02:17,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:17,909 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:17,910 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:17,910 INFO L82 PathProgramCache]: Analyzing trace with hash 338848400, now seen corresponding path program 1 times [2019-10-13 23:02:17,910 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:17,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21911126] [2019-10-13 23:02:17,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:17,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:17,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:18,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21911126] [2019-10-13 23:02:18,133 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:18,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:18,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197491597] [2019-10-13 23:02:18,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:18,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:18,135 INFO L87 Difference]: Start difference. First operand 4307 states and 6517 transitions. Second operand 9 states. [2019-10-13 23:02:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:18,551 INFO L93 Difference]: Finished difference Result 8185 states and 12666 transitions. [2019-10-13 23:02:18,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 23:02:18,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 148 [2019-10-13 23:02:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:18,598 INFO L225 Difference]: With dead ends: 8185 [2019-10-13 23:02:18,598 INFO L226 Difference]: Without dead ends: 4715 [2019-10-13 23:02:18,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2019-10-13 23:02:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4715. [2019-10-13 23:02:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2019-10-13 23:02:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 7125 transitions. [2019-10-13 23:02:18,962 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 7125 transitions. Word has length 148 [2019-10-13 23:02:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:18,964 INFO L462 AbstractCegarLoop]: Abstraction has 4715 states and 7125 transitions. [2019-10-13 23:02:18,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 7125 transitions. [2019-10-13 23:02:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 23:02:18,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:18,969 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:18,970 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2128988024, now seen corresponding path program 1 times [2019-10-13 23:02:18,970 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:18,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241863022] [2019-10-13 23:02:18,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:18,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:18,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:19,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241863022] [2019-10-13 23:02:19,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:19,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 23:02:19,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609676634] [2019-10-13 23:02:19,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:02:19,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:19,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:02:19,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:19,181 INFO L87 Difference]: Start difference. First operand 4715 states and 7125 transitions. Second operand 6 states.