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_spec14_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:06:29,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:06:29,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:06:29,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:06:29,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:06:29,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:06:29,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:06:29,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:06:29,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:06:29,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:06:29,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:06:29,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:06:29,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:06:29,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:06:29,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:06:29,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:06:29,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:06:29,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:06:29,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:06:29,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:06:29,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:06:29,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:06:29,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:06:29,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:06:29,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:06:29,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:06:29,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:06:29,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:06:29,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:06:29,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:06:29,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:06:29,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:06:29,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:06:29,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:06:29,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:06:29,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:06:29,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:06:29,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:06:29,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:06:29,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:06:29,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:06:29,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:06:29,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:06:29,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:06:29,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:06:29,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:06:29,113 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:06:29,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:06:29,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:06:29,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:06:29,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:06:29,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:06:29,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:06:29,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:06:29,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:06:29,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:06:29,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:06:29,116 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:06:29,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:06:29,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:06:29,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:06:29,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:06:29,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:06:29,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:06:29,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:06:29,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:06:29,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:06:29,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:06:29,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:06:29,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:06:29,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:06:29,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:06:29,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:06:29,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:06:29,466 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:06:29,466 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:06:29,467 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product32.cil.c [2019-10-15 03:06:29,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d1df5a0/a8de895963684280bd6da27015c983a6/FLAGbda0a5815 [2019-10-15 03:06:30,282 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:06:30,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product32.cil.c [2019-10-15 03:06:30,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d1df5a0/a8de895963684280bd6da27015c983a6/FLAGbda0a5815 [2019-10-15 03:06:30,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d1df5a0/a8de895963684280bd6da27015c983a6 [2019-10-15 03:06:30,454 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:06:30,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:06:30,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:06:30,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:06:30,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:06:30,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:06:30" (1/1) ... [2019-10-15 03:06:30,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d73c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:30, skipping insertion in model container [2019-10-15 03:06:30,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:06:30" (1/1) ... [2019-10-15 03:06:30,483 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:06:30,586 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:06:31,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:06:31,390 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:06:31,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:06:31,691 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:06:31,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31 WrapperNode [2019-10-15 03:06:31,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:06:31,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:06:31,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:06:31,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:06:31,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... [2019-10-15 03:06:31,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:06:31,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:06:31,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:06:31,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:06:31,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:06:32,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:06:32,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:06:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:06:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:06:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:06:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:06:32,085 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:06:32,085 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:06:32,085 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:06:32,085 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:06:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:06:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:06:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:06:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:06:32,087 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:06:32,087 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:06:32,087 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:06:32,087 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:06:32,087 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:06:32,088 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:06:32,088 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:06:32,088 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:06:32,089 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:06:32,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:06:32,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:06:32,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:06:32,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:06:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:06:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:06:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:06:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:06:32,090 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:06:32,091 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:06:32,091 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:06:32,091 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:06:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:06:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:06:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:06:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:06:32,092 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:06:32,093 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:06:32,093 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:06:32,093 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:06:32,093 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:06:32,093 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:06:32,094 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:06:32,094 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:06:32,094 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 03:06:32,094 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:06:32,096 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 03:06:32,096 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 03:06:32,096 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:06:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:06:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:06:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:06:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:06:32,097 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:06:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:06:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:06:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:06:32,099 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:06:32,099 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:06:32,099 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 03:06:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:06:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:06:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:06:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:06:32,101 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 03:06:32,101 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:06:32,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:06:32,101 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:06:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-15 03:06:32,102 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:06:32,103 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-15 03:06:32,103 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:06:32,103 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:06:32,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 03:06:32,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 03:06:32,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:06:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-15 03:06:32,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:06:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:06:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:06:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:06:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:06:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:06:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:06:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:06:32,107 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:06:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:06:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:06:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:06:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:06:32,108 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:06:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:06:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:06:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:06:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:06:32,109 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:06:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:06:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:06:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:06:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:06:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:06:32,110 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:06:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:06:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:06:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:06:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:06:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:06:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:06:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:06:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:06:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:06:32,113 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:06:32,113 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:06:32,113 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:06:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:06:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:06:32,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:06:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:06:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:06:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:06:32,115 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:06:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:06:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:06:32,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:06:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:06:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:06:32,117 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:06:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:06:32,118 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:06:32,119 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:06:32,119 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:06:32,122 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:06:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:06:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:06:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:06:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:06:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:06:32,123 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:06:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:06:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:06:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:06:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:06:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:06:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:06:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:06:32,132 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 03:06:32,133 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 03:06:32,133 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:06:32,134 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:06:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:06:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:06:32,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:06:32,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:06:39,165 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:06:39,166 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:06:39,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:06:39 BoogieIcfgContainer [2019-10-15 03:06:39,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:06:39,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:06:39,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:06:39,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:06:39,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:06:30" (1/3) ... [2019-10-15 03:06:39,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4ac8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:06:39, skipping insertion in model container [2019-10-15 03:06:39,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:06:31" (2/3) ... [2019-10-15 03:06:39,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4ac8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:06:39, skipping insertion in model container [2019-10-15 03:06:39,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:06:39" (3/3) ... [2019-10-15 03:06:39,183 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product32.cil.c [2019-10-15 03:06:39,194 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:06:39,205 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:06:39,217 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:06:39,251 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:06:39,252 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:06:39,252 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:06:39,252 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:06:39,252 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:06:39,252 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:06:39,252 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:06:39,252 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:06:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states. [2019-10-15 03:06:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 03:06:39,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:39,304 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:39,306 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:39,311 INFO L82 PathProgramCache]: Analyzing trace with hash -252975014, now seen corresponding path program 1 times [2019-10-15 03:06:39,324 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:39,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63536501] [2019-10-15 03:06:39,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:39,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:39,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:06:40,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63536501] [2019-10-15 03:06:40,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:40,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:06:40,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222595153] [2019-10-15 03:06:40,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:06:40,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:40,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:06:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:06:40,169 INFO L87 Difference]: Start difference. First operand 587 states. Second operand 3 states. [2019-10-15 03:06:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:40,699 INFO L93 Difference]: Finished difference Result 1338 states and 1999 transitions. [2019-10-15 03:06:40,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:06:40,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-15 03:06:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:40,733 INFO L225 Difference]: With dead ends: 1338 [2019-10-15 03:06:40,734 INFO L226 Difference]: Without dead ends: 879 [2019-10-15 03:06:40,746 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:06:40,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2019-10-15 03:06:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 834. [2019-10-15 03:06:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2019-10-15 03:06:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1241 transitions. [2019-10-15 03:06:40,973 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1241 transitions. Word has length 72 [2019-10-15 03:06:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:40,974 INFO L462 AbstractCegarLoop]: Abstraction has 834 states and 1241 transitions. [2019-10-15 03:06:40,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:06:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1241 transitions. [2019-10-15 03:06:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 03:06:40,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:41,000 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-10-15 03:06:41,001 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1851066837, now seen corresponding path program 1 times [2019-10-15 03:06:41,003 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:41,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247117613] [2019-10-15 03:06:41,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:41,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:41,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:06:41,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247117613] [2019-10-15 03:06:41,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409304735] [2019-10-15 03:06:41,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:42,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 03:06:42,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:06:42,293 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:06:42,711 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:42,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-10-15 03:06:42,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509214214] [2019-10-15 03:06:42,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:06:42,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:06:42,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:06:42,715 INFO L87 Difference]: Start difference. First operand 834 states and 1241 transitions. Second operand 6 states. [2019-10-15 03:06:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:43,852 INFO L93 Difference]: Finished difference Result 1920 states and 2834 transitions. [2019-10-15 03:06:43,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:06:43,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-15 03:06:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:43,867 INFO L225 Difference]: With dead ends: 1920 [2019-10-15 03:06:43,867 INFO L226 Difference]: Without dead ends: 1116 [2019-10-15 03:06:43,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 230 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-15 03:06:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-15 03:06:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1109. [2019-10-15 03:06:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-10-15 03:06:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1603 transitions. [2019-10-15 03:06:44,043 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1603 transitions. Word has length 119 [2019-10-15 03:06:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:44,044 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1603 transitions. [2019-10-15 03:06:44,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:06:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1603 transitions. [2019-10-15 03:06:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 03:06:44,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:44,050 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-10-15 03:06:44,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:44,270 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash -28644872, now seen corresponding path program 1 times [2019-10-15 03:06:44,271 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:44,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85488326] [2019-10-15 03:06:44,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:44,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:44,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 03:06:44,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85488326] [2019-10-15 03:06:44,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:44,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:06:44,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348326151] [2019-10-15 03:06:44,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:06:44,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:06:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:06:44,692 INFO L87 Difference]: Start difference. First operand 1109 states and 1603 transitions. Second operand 7 states. [2019-10-15 03:06:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:50,006 INFO L93 Difference]: Finished difference Result 3104 states and 4564 transitions. [2019-10-15 03:06:50,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 03:06:50,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2019-10-15 03:06:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:50,027 INFO L225 Difference]: With dead ends: 3104 [2019-10-15 03:06:50,027 INFO L226 Difference]: Without dead ends: 2027 [2019-10-15 03:06:50,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:06:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2019-10-15 03:06:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1932. [2019-10-15 03:06:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1932 states. [2019-10-15 03:06:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 2836 transitions. [2019-10-15 03:06:50,160 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 2836 transitions. Word has length 120 [2019-10-15 03:06:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:50,160 INFO L462 AbstractCegarLoop]: Abstraction has 1932 states and 2836 transitions. [2019-10-15 03:06:50,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:06:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 2836 transitions. [2019-10-15 03:06:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 03:06:50,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:50,165 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:50,165 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:50,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:50,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1126530492, now seen corresponding path program 1 times [2019-10-15 03:06:50,166 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:50,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946784407] [2019-10-15 03:06:50,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:50,167 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:50,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:06:50,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946784407] [2019-10-15 03:06:50,486 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:50,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-15 03:06:50,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590091454] [2019-10-15 03:06:50,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:06:50,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:06:50,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:06:50,488 INFO L87 Difference]: Start difference. First operand 1932 states and 2836 transitions. Second operand 9 states. [2019-10-15 03:06:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:56,140 INFO L93 Difference]: Finished difference Result 2111 states and 3118 transitions. [2019-10-15 03:06:56,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 03:06:56,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-10-15 03:06:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:56,162 INFO L225 Difference]: With dead ends: 2111 [2019-10-15 03:06:56,162 INFO L226 Difference]: Without dead ends: 2108 [2019-10-15 03:06:56,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-10-15 03:06:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-10-15 03:06:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2028. [2019-10-15 03:06:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2019-10-15 03:06:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2995 transitions. [2019-10-15 03:06:56,280 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2995 transitions. Word has length 124 [2019-10-15 03:06:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:56,282 INFO L462 AbstractCegarLoop]: Abstraction has 2028 states and 2995 transitions. [2019-10-15 03:06:56,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:06:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2995 transitions. [2019-10-15 03:06:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 03:06:56,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:56,290 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:56,290 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:56,291 INFO L82 PathProgramCache]: Analyzing trace with hash 913097270, now seen corresponding path program 1 times [2019-10-15 03:06:56,291 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:56,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678098561] [2019-10-15 03:06:56,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:56,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:56,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-15 03:06:56,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678098561] [2019-10-15 03:06:56,516 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:06:56,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:06:56,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103629312] [2019-10-15 03:06:56,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:06:56,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:06:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:06:56,523 INFO L87 Difference]: Start difference. First operand 2028 states and 2995 transitions. Second operand 5 states. [2019-10-15 03:06:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:56,666 INFO L93 Difference]: Finished difference Result 4049 states and 6027 transitions. [2019-10-15 03:06:56,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:56,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2019-10-15 03:06:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:56,683 INFO L225 Difference]: With dead ends: 4049 [2019-10-15 03:06:56,683 INFO L226 Difference]: Without dead ends: 2052 [2019-10-15 03:06:56,697 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 [2019-10-15 03:06:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-10-15 03:06:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2052. [2019-10-15 03:06:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2052 states. [2019-10-15 03:06:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3019 transitions. [2019-10-15 03:06:56,826 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3019 transitions. Word has length 160 [2019-10-15 03:06:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:56,829 INFO L462 AbstractCegarLoop]: Abstraction has 2052 states and 3019 transitions. [2019-10-15 03:06:56,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:06:56,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3019 transitions. [2019-10-15 03:06:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 03:06:56,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:56,836 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:56,837 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:56,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1862977440, now seen corresponding path program 1 times [2019-10-15 03:06:56,837 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:56,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106298379] [2019-10-15 03:06:56,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:56,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:56,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:06:57,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106298379] [2019-10-15 03:06:57,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758539584] [2019-10-15 03:06:57,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:57,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 3190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:06:57,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 03:06:58,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:06:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:06:58,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:06:58,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 03:06:58,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855934758] [2019-10-15 03:06:58,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:06:58,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:06:58,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:06:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:06:58,269 INFO L87 Difference]: Start difference. First operand 2052 states and 3019 transitions. Second operand 4 states. [2019-10-15 03:06:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:06:58,542 INFO L93 Difference]: Finished difference Result 4229 states and 6366 transitions. [2019-10-15 03:06:58,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:06:58,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-10-15 03:06:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:06:58,558 INFO L225 Difference]: With dead ends: 4229 [2019-10-15 03:06:58,558 INFO L226 Difference]: Without dead ends: 2208 [2019-10-15 03:06:58,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:06:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2019-10-15 03:06:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2019-10-15 03:06:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2208 states. [2019-10-15 03:06:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3311 transitions. [2019-10-15 03:06:58,694 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3311 transitions. Word has length 169 [2019-10-15 03:06:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:06:58,695 INFO L462 AbstractCegarLoop]: Abstraction has 2208 states and 3311 transitions. [2019-10-15 03:06:58,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:06:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3311 transitions. [2019-10-15 03:06:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 03:06:58,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:06:58,703 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:06:58,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:58,911 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:06:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:06:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1563345573, now seen corresponding path program 1 times [2019-10-15 03:06:58,912 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:06:58,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031789630] [2019-10-15 03:06:58,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:58,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:06:58,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:06:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 03:06:59,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031789630] [2019-10-15 03:06:59,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791264181] [2019-10-15 03:06:59,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:06:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:06:59,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 3195 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:06:59,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:06:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:06:59,879 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:07:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 03:07:00,117 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:07:00,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 03:07:00,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383653573] [2019-10-15 03:07:00,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:07:00,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:07:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:07:00,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:07:00,121 INFO L87 Difference]: Start difference. First operand 2208 states and 3311 transitions. Second operand 4 states. [2019-10-15 03:07:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:07:00,519 INFO L93 Difference]: Finished difference Result 4541 states and 6946 transitions. [2019-10-15 03:07:00,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:07:00,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-15 03:07:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:07:00,536 INFO L225 Difference]: With dead ends: 4541 [2019-10-15 03:07:00,536 INFO L226 Difference]: Without dead ends: 2364 [2019-10-15 03:07:00,549 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:07:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2019-10-15 03:07:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2019-10-15 03:07:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2019-10-15 03:07:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3603 transitions. [2019-10-15 03:07:00,663 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3603 transitions. Word has length 174 [2019-10-15 03:07:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:07:00,668 INFO L462 AbstractCegarLoop]: Abstraction has 2364 states and 3603 transitions. [2019-10-15 03:07:00,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:07:00,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3603 transitions. [2019-10-15 03:07:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 03:07:00,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:07:00,678 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:07:00,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:07:00,889 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:07:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:07:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash 456525333, now seen corresponding path program 1 times [2019-10-15 03:07:00,891 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:07:00,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929809407] [2019-10-15 03:07:00,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:00,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:00,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:07:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:07:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:07:01,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929809407] [2019-10-15 03:07:01,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018560671] [2019-10-15 03:07:01,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:07:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:07:01,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:07:01,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:07:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 03:07:01,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:07:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:07:02,278 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:07:02,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 03:07:02,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333413498] [2019-10-15 03:07:02,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:07:02,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:07:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:07:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:07:02,280 INFO L87 Difference]: Start difference. First operand 2364 states and 3603 transitions. Second operand 4 states. [2019-10-15 03:07:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:07:02,595 INFO L93 Difference]: Finished difference Result 4853 states and 7526 transitions. [2019-10-15 03:07:02,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:07:02,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-15 03:07:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:07:02,610 INFO L225 Difference]: With dead ends: 4853 [2019-10-15 03:07:02,610 INFO L226 Difference]: Without dead ends: 2520 [2019-10-15 03:07:02,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:07:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2019-10-15 03:07:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2520. [2019-10-15 03:07:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2019-10-15 03:07:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3895 transitions. [2019-10-15 03:07:02,743 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3895 transitions. Word has length 178 [2019-10-15 03:07:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:07:02,744 INFO L462 AbstractCegarLoop]: Abstraction has 2520 states and 3895 transitions. [2019-10-15 03:07:02,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:07:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3895 transitions. [2019-10-15 03:07:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 03:07:02,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:07:02,754 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:07:02,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:07:02,963 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:07:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:07:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash 726319424, now seen corresponding path program 1 times [2019-10-15 03:07:02,964 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:07:02,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826260115] [2019-10-15 03:07:02,965 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:02,965 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:02,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:07:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:07:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 03:07:03,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826260115] [2019-10-15 03:07:03,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029746124] [2019-10-15 03:07:03,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:07:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:07:03,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 3202 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:07:03,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:07:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-15 03:07:03,893 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:07:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 03:07:04,158 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:07:04,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 03:07:04,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504247144] [2019-10-15 03:07:04,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:07:04,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:07:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:07:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:07:04,160 INFO L87 Difference]: Start difference. First operand 2520 states and 3895 transitions. Second operand 4 states. [2019-10-15 03:07:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:07:04,421 INFO L93 Difference]: Finished difference Result 5165 states and 8106 transitions. [2019-10-15 03:07:04,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:07:04,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-10-15 03:07:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:07:04,436 INFO L225 Difference]: With dead ends: 5165 [2019-10-15 03:07:04,436 INFO L226 Difference]: Without dead ends: 2676 [2019-10-15 03:07:04,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 359 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:07:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2019-10-15 03:07:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2676. [2019-10-15 03:07:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2676 states. [2019-10-15 03:07:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4187 transitions. [2019-10-15 03:07:04,559 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4187 transitions. Word has length 181 [2019-10-15 03:07:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:07:04,559 INFO L462 AbstractCegarLoop]: Abstraction has 2676 states and 4187 transitions. [2019-10-15 03:07:04,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:07:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4187 transitions. [2019-10-15 03:07:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 03:07:04,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:07:04,569 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:07:04,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:07:04,781 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:07:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:07:04,781 INFO L82 PathProgramCache]: Analyzing trace with hash 563451854, now seen corresponding path program 1 times [2019-10-15 03:07:04,782 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:07:04,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102732829] [2019-10-15 03:07:04,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:04,782 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:04,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:07:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:07:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:07:05,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102732829] [2019-10-15 03:07:05,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475787038] [2019-10-15 03:07:05,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:07:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:07:06,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 3198 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-15 03:07:06,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:07:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 03:07:06,186 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:07:06,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:07:06,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:07:06,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:07:06,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:07:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 03:07:06,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414287887] [2019-10-15 03:07:06,942 INFO L162 IcfgInterpreter]: Started Sifa with 143 locations of interest [2019-10-15 03:07:06,943 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:07:06,949 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:07:06,957 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:07:06,958 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs