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_spec9_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:05:23,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:05:23,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:05:23,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:05:23,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:05:23,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:05:23,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:05:23,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:05:23,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:05:23,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:05:23,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:05:23,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:05:23,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:05:23,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:05:23,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:05:23,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:05:23,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:05:23,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:05:23,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:05:23,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:05:23,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:05:23,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:05:23,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:05:23,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:05:23,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:05:23,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:05:23,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:05:23,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:05:23,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:05:23,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:05:23,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:05:23,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:05:23,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:05:23,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:05:23,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:05:23,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:05:23,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:05:23,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:05:23,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:05:23,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:05:23,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:05:23,457 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 23:05:23,482 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:05:23,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:05:23,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:05:23,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:05:23,485 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:05:23,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:05:23,486 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:05:23,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:05:23,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:05:23,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:05:23,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:05:23,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:05:23,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:05:23,488 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:05:23,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:05:23,489 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:05:23,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:05:23,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:05:23,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:05:23,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:05:23,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:05:23,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:05:23,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:05:23,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:05:23,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:05:23,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:05:23,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:05:23,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:05:23,492 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 23:05:23,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:05:23,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:05:23,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:05:23,832 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:05:23,832 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:05:23,833 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec9_product26.cil.c [2019-10-13 23:05:23,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2219f5828/be6f24cc543a4171861aa16fe4df9f32/FLAGedde88d18 [2019-10-13 23:05:24,650 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:05:24,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec9_product26.cil.c [2019-10-13 23:05:24,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2219f5828/be6f24cc543a4171861aa16fe4df9f32/FLAGedde88d18 [2019-10-13 23:05:24,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2219f5828/be6f24cc543a4171861aa16fe4df9f32 [2019-10-13 23:05:24,824 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:05:24,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:05:24,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:05:24,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:05:24,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:05:24,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:05:24" (1/1) ... [2019-10-13 23:05:24,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b61f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:24, skipping insertion in model container [2019-10-13 23:05:24,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:05:24" (1/1) ... [2019-10-13 23:05:24,840 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:05:24,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:05:25,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:05:25,752 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:05:25,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:05:26,037 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:05:26,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26 WrapperNode [2019-10-13 23:05:26,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:05:26,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:05:26,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:05:26,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:05:26,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (1/1) ... [2019-10-13 23:05:26,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:05:26,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:05:26,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:05:26,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:05:26,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (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 23:05:26,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:05:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:05:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:05:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:05:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:05:26,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:05:26,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:05:26,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:05:26,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:05:26,360 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:05:26,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2019-10-13 23:05:26,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2019-10-13 23:05:26,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2019-10-13 23:05:26,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2019-10-13 23:05:26,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:05:26,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:05:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:05:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:05:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:05:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:05:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:05:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:05:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:05:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:05:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:05:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:05:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:05:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:05:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:05:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:05:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:05:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:05:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:05:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:05:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:05:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:05:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:05:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2019-10-13 23:05:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:05:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2019-10-13 23:05:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:05:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:05:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:05:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:05:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:05:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:05:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:05:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:05:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:05:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:05:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:05:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:05:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:05:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:05:26,373 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:05:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:05:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:05:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:05:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:05:26,375 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:05:26,375 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:05:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:05:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:05:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:05:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:05:26,376 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:05:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:05:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:05:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:05:26,377 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:05:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:05:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:05:26,378 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:05:26,379 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:05:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:05:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:05:26,381 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:05:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:05:26,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:05:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:05:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:05:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:05:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:05:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:05:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:05:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:05:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:05:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:05:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:05:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:05:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:05:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:05:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:05:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:05:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:05:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:05:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:05:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:05:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:05:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:05:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:05:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:05:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:05:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2019-10-13 23:05:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2019-10-13 23:05:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2019-10-13 23:05:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2019-10-13 23:05:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:05:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:05:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:05:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:05:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:05:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:05:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:05:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:05:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:05:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:05:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:05:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:05:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:05:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:05:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:05:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:05:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:05:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:05:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:05:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:05:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:05:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:05:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:05:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:05:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:05:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:05:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:05:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:05:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:05:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:05:26,402 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:05:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2019-10-13 23:05:26,403 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2019-10-13 23:05:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:05:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:05:26,404 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:05:26,405 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:05:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:05:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:05:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:05:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:05:26,413 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:05:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:05:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:05:26,414 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:05:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:05:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:05:26,415 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:05:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:05:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:05:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:05:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:05:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:05:26,416 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:05:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:05:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:05:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:05:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:05:26,417 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:05:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:05:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:05:26,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:05:31,441 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:05:31,442 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:05:31,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:05:31 BoogieIcfgContainer [2019-10-13 23:05:31,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:05:31,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:05:31,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:05:31,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:05:31,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:05:24" (1/3) ... [2019-10-13 23:05:31,450 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 13.10 11:05:31, skipping insertion in model container [2019-10-13 23:05:31,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:05:26" (2/3) ... [2019-10-13 23:05:31,450 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 13.10 11:05:31, skipping insertion in model container [2019-10-13 23:05:31,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:05:31" (3/3) ... [2019-10-13 23:05:31,452 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product26.cil.c [2019-10-13 23:05:31,462 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:05:31,472 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:05:31,482 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:05:31,514 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:05:31,515 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:05:31,515 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:05:31,515 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:05:31,515 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:05:31,515 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:05:31,515 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:05:31,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:05:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states. [2019-10-13 23:05:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 23:05:31,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:31,566 INFO L380 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] [2019-10-13 23:05:31,568 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:31,575 INFO L82 PathProgramCache]: Analyzing trace with hash 656701151, now seen corresponding path program 1 times [2019-10-13 23:05:31,585 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:31,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807535174] [2019-10-13 23:05:31,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:31,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:31,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:32,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807535174] [2019-10-13 23:05:32,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:32,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:05:32,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132958903] [2019-10-13 23:05:32,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:05:32,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:05:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:05:32,174 INFO L87 Difference]: Start difference. First operand 555 states. Second operand 2 states. [2019-10-13 23:05:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:32,250 INFO L93 Difference]: Finished difference Result 452 states and 672 transitions. [2019-10-13 23:05:32,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:05:32,252 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 74 [2019-10-13 23:05:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:32,274 INFO L225 Difference]: With dead ends: 452 [2019-10-13 23:05:32,274 INFO L226 Difference]: Without dead ends: 418 [2019-10-13 23:05:32,279 INFO L600 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 [2019-10-13 23:05:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-10-13 23:05:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2019-10-13 23:05:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2019-10-13 23:05:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 621 transitions. [2019-10-13 23:05:32,374 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 621 transitions. Word has length 74 [2019-10-13 23:05:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:32,376 INFO L462 AbstractCegarLoop]: Abstraction has 418 states and 621 transitions. [2019-10-13 23:05:32,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:05:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 621 transitions. [2019-10-13 23:05:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 23:05:32,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:32,383 INFO L380 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] [2019-10-13 23:05:32,384 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1065118318, now seen corresponding path program 1 times [2019-10-13 23:05:32,385 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:32,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391582542] [2019-10-13 23:05:32,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:32,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:32,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:32,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391582542] [2019-10-13 23:05:32,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:32,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 23:05:32,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344174967] [2019-10-13 23:05:32,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:05:32,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:05:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:05:32,797 INFO L87 Difference]: Start difference. First operand 418 states and 621 transitions. Second operand 6 states. [2019-10-13 23:05:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:36,004 INFO L93 Difference]: Finished difference Result 1269 states and 1951 transitions. [2019-10-13 23:05:36,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:05:36,004 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2019-10-13 23:05:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:36,015 INFO L225 Difference]: With dead ends: 1269 [2019-10-13 23:05:36,016 INFO L226 Difference]: Without dead ends: 893 [2019-10-13 23:05:36,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2019-10-13 23:05:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 798. [2019-10-13 23:05:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 798 states. [2019-10-13 23:05:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1228 transitions. [2019-10-13 23:05:36,113 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1228 transitions. Word has length 75 [2019-10-13 23:05:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:36,113 INFO L462 AbstractCegarLoop]: Abstraction has 798 states and 1228 transitions. [2019-10-13 23:05:36,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:05:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1228 transitions. [2019-10-13 23:05:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 23:05:36,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:36,122 INFO L380 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] [2019-10-13 23:05:36,123 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1830198667, now seen corresponding path program 1 times [2019-10-13 23:05:36,124 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:36,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228894231] [2019-10-13 23:05:36,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:36,124 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:36,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:36,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228894231] [2019-10-13 23:05:36,443 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:36,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:05:36,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670133337] [2019-10-13 23:05:36,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:05:36,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:05:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:36,445 INFO L87 Difference]: Start difference. First operand 798 states and 1228 transitions. Second operand 8 states. [2019-10-13 23:05:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:36,534 INFO L93 Difference]: Finished difference Result 1647 states and 2585 transitions. [2019-10-13 23:05:36,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:05:36,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2019-10-13 23:05:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:36,543 INFO L225 Difference]: With dead ends: 1647 [2019-10-13 23:05:36,544 INFO L226 Difference]: Without dead ends: 892 [2019-10-13 23:05:36,549 INFO L600 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 [2019-10-13 23:05:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2019-10-13 23:05:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 806. [2019-10-13 23:05:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2019-10-13 23:05:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1236 transitions. [2019-10-13 23:05:36,622 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1236 transitions. Word has length 103 [2019-10-13 23:05:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:36,622 INFO L462 AbstractCegarLoop]: Abstraction has 806 states and 1236 transitions. [2019-10-13 23:05:36,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:05:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1236 transitions. [2019-10-13 23:05:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 23:05:36,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:36,634 INFO L380 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] [2019-10-13 23:05:36,634 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash -979744122, now seen corresponding path program 1 times [2019-10-13 23:05:36,635 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:36,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935781229] [2019-10-13 23:05:36,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:36,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:36,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:36,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935781229] [2019-10-13 23:05:36,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:36,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 23:05:36,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125659688] [2019-10-13 23:05:36,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 23:05:36,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 23:05:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:36,921 INFO L87 Difference]: Start difference. First operand 806 states and 1236 transitions. Second operand 12 states. [2019-10-13 23:05:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:43,646 INFO L93 Difference]: Finished difference Result 2397 states and 3696 transitions. [2019-10-13 23:05:43,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 23:05:43,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2019-10-13 23:05:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:43,662 INFO L225 Difference]: With dead ends: 2397 [2019-10-13 23:05:43,662 INFO L226 Difference]: Without dead ends: 1633 [2019-10-13 23:05:43,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-10-13 23:05:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2019-10-13 23:05:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1574. [2019-10-13 23:05:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1574 states. [2019-10-13 23:05:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2407 transitions. [2019-10-13 23:05:43,818 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2407 transitions. Word has length 106 [2019-10-13 23:05:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:43,819 INFO L462 AbstractCegarLoop]: Abstraction has 1574 states and 2407 transitions. [2019-10-13 23:05:43,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 23:05:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2407 transitions. [2019-10-13 23:05:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 23:05:43,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:43,832 INFO L380 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] [2019-10-13 23:05:43,832 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:43,833 INFO L82 PathProgramCache]: Analyzing trace with hash -856895825, now seen corresponding path program 1 times [2019-10-13 23:05:43,833 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:43,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731413184] [2019-10-13 23:05:43,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:43,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:43,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:44,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731413184] [2019-10-13 23:05:44,022 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:44,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:05:44,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130773372] [2019-10-13 23:05:44,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:05:44,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:44,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:05:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:05:44,025 INFO L87 Difference]: Start difference. First operand 1574 states and 2407 transitions. Second operand 5 states. [2019-10-13 23:05:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:44,145 INFO L93 Difference]: Finished difference Result 3128 states and 4815 transitions. [2019-10-13 23:05:44,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:05:44,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-10-13 23:05:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:44,161 INFO L225 Difference]: With dead ends: 3128 [2019-10-13 23:05:44,161 INFO L226 Difference]: Without dead ends: 1598 [2019-10-13 23:05:44,169 INFO L600 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 [2019-10-13 23:05:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2019-10-13 23:05:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1590. [2019-10-13 23:05:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2019-10-13 23:05:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2427 transitions. [2019-10-13 23:05:44,286 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2427 transitions. Word has length 107 [2019-10-13 23:05:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:44,287 INFO L462 AbstractCegarLoop]: Abstraction has 1590 states and 2427 transitions. [2019-10-13 23:05:44,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:05:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2427 transitions. [2019-10-13 23:05:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 23:05:44,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:44,299 INFO L380 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] [2019-10-13 23:05:44,300 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:44,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1346215111, now seen corresponding path program 1 times [2019-10-13 23:05:44,300 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:44,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326762144] [2019-10-13 23:05:44,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:44,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:44,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:05:44,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326762144] [2019-10-13 23:05:44,523 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:44,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 23:05:44,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771669560] [2019-10-13 23:05:44,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:05:44,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:44,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:05:44,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:05:44,526 INFO L87 Difference]: Start difference. First operand 1590 states and 2427 transitions. Second operand 6 states. [2019-10-13 23:05:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:48,123 INFO L93 Difference]: Finished difference Result 5339 states and 8199 transitions. [2019-10-13 23:05:48,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:05:48,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-10-13 23:05:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:48,151 INFO L225 Difference]: With dead ends: 5339 [2019-10-13 23:05:48,151 INFO L226 Difference]: Without dead ends: 3793 [2019-10-13 23:05:48,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:05:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2019-10-13 23:05:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3759. [2019-10-13 23:05:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3759 states. [2019-10-13 23:05:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5690 transitions. [2019-10-13 23:05:48,378 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5690 transitions. Word has length 111 [2019-10-13 23:05:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:48,379 INFO L462 AbstractCegarLoop]: Abstraction has 3759 states and 5690 transitions. [2019-10-13 23:05:48,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:05:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5690 transitions. [2019-10-13 23:05:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 23:05:48,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:48,385 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:05:48,385 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -642163230, now seen corresponding path program 1 times [2019-10-13 23:05:48,386 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:48,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517952282] [2019-10-13 23:05:48,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:48,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:48,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:48,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517952282] [2019-10-13 23:05:48,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:48,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:05:48,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922255301] [2019-10-13 23:05:48,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:48,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:48,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:48,587 INFO L87 Difference]: Start difference. First operand 3759 states and 5690 transitions. Second operand 3 states. [2019-10-13 23:05:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:48,844 INFO L93 Difference]: Finished difference Result 9557 states and 14696 transitions. [2019-10-13 23:05:48,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:48,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-13 23:05:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:48,900 INFO L225 Difference]: With dead ends: 9557 [2019-10-13 23:05:48,901 INFO L226 Difference]: Without dead ends: 5840 [2019-10-13 23:05:48,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2019-10-13 23:05:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5793. [2019-10-13 23:05:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5793 states. [2019-10-13 23:05:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5793 states to 5793 states and 8861 transitions. [2019-10-13 23:05:49,307 INFO L78 Accepts]: Start accepts. Automaton has 5793 states and 8861 transitions. Word has length 119 [2019-10-13 23:05:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:49,308 INFO L462 AbstractCegarLoop]: Abstraction has 5793 states and 8861 transitions. [2019-10-13 23:05:49,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5793 states and 8861 transitions. [2019-10-13 23:05:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 23:05:49,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:49,313 INFO L380 BasicCegarLoop]: trace histogram [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 23:05:49,313 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:49,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1566480303, now seen corresponding path program 1 times [2019-10-13 23:05:49,314 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:49,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141787783] [2019-10-13 23:05:49,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:49,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:49,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:49,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141787783] [2019-10-13 23:05:49,483 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:49,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:05:49,483 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821313321] [2019-10-13 23:05:49,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:49,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:49,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:49,485 INFO L87 Difference]: Start difference. First operand 5793 states and 8861 transitions. Second operand 3 states. [2019-10-13 23:05:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:49,957 INFO L93 Difference]: Finished difference Result 15660 states and 24495 transitions. [2019-10-13 23:05:49,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:49,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-13 23:05:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:50,052 INFO L225 Difference]: With dead ends: 15660 [2019-10-13 23:05:50,052 INFO L226 Difference]: Without dead ends: 9910 [2019-10-13 23:05:50,090 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9910 states. [2019-10-13 23:05:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9910 to 9862. [2019-10-13 23:05:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9862 states. [2019-10-13 23:05:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9862 states to 9862 states and 15350 transitions. [2019-10-13 23:05:50,616 INFO L78 Accepts]: Start accepts. Automaton has 9862 states and 15350 transitions. Word has length 120 [2019-10-13 23:05:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:50,619 INFO L462 AbstractCegarLoop]: Abstraction has 9862 states and 15350 transitions. [2019-10-13 23:05:50,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 9862 states and 15350 transitions. [2019-10-13 23:05:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 23:05:50,623 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:50,623 INFO L380 BasicCegarLoop]: trace histogram [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 23:05:50,624 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1314956996, now seen corresponding path program 1 times [2019-10-13 23:05:50,624 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:50,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555504841] [2019-10-13 23:05:50,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:50,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:50,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:50,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555504841] [2019-10-13 23:05:50,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:50,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:05:50,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735069715] [2019-10-13 23:05:50,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:50,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:50,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:50,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:50,782 INFO L87 Difference]: Start difference. First operand 9862 states and 15350 transitions. Second operand 3 states. [2019-10-13 23:05:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:51,468 INFO L93 Difference]: Finished difference Result 27867 states and 44898 transitions. [2019-10-13 23:05:51,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:51,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-13 23:05:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:51,597 INFO L225 Difference]: With dead ends: 27867 [2019-10-13 23:05:51,598 INFO L226 Difference]: Without dead ends: 18050 [2019-10-13 23:05:51,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18050 states. [2019-10-13 23:05:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18050 to 18001. [2019-10-13 23:05:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18001 states. [2019-10-13 23:05:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18001 states to 18001 states and 28859 transitions. [2019-10-13 23:05:53,536 INFO L78 Accepts]: Start accepts. Automaton has 18001 states and 28859 transitions. Word has length 121 [2019-10-13 23:05:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:53,539 INFO L462 AbstractCegarLoop]: Abstraction has 18001 states and 28859 transitions. [2019-10-13 23:05:53,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 18001 states and 28859 transitions. [2019-10-13 23:05:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 23:05:53,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:53,544 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:53,544 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2107672977, now seen corresponding path program 1 times [2019-10-13 23:05:53,545 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:53,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073886629] [2019-10-13 23:05:53,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:53,546 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:53,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:53,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073886629] [2019-10-13 23:05:53,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:05:53,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:05:53,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429556564] [2019-10-13 23:05:53,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:53,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:05:53,706 INFO L87 Difference]: Start difference. First operand 18001 states and 28859 transitions. Second operand 3 states.