java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:01:47,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:01:47,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:01:47,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:01:47,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:01:47,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:01:47,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:01:47,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:01:47,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:01:47,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:01:47,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:01:47,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:01:47,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:01:47,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:01:47,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:01:47,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:01:47,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:01:47,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:01:47,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:01:47,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:01:47,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:01:47,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:01:47,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:01:47,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:01:47,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:01:48,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:01:48,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:01:48,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:01:48,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:01:48,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:01:48,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:01:48,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:01:48,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:01:48,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:01:48,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:01:48,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:01:48,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:01:48,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:01:48,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:01:48,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:01:48,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:01:48,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:01:48,024 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:01:48,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:01:48,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:01:48,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:01:48,026 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:01:48,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:01:48,026 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:01:48,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:01:48,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:01:48,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:01:48,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:01:48,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:01:48,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:01:48,028 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:01:48,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:01:48,028 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:01:48,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:01:48,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:01:48,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:01:48,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:01:48,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:01:48,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:48,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:01:48,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:01:48,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:01:48,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:01:48,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:01:48,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:01:48,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:01:48,311 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:01:48,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:01:48,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:01:48,328 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:01:48,329 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:01:48,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c [2019-10-13 23:01:48,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df0e36c5e/b3a86d52aa1648b79db3e511f5614331/FLAG6d7d56514 [2019-10-13 23:01:48,992 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:01:48,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product24.cil.c [2019-10-13 23:01:49,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df0e36c5e/b3a86d52aa1648b79db3e511f5614331/FLAG6d7d56514 [2019-10-13 23:01:49,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df0e36c5e/b3a86d52aa1648b79db3e511f5614331 [2019-10-13 23:01:49,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:01:49,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:01:49,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:49,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:01:49,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:01:49,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:49" (1/1) ... [2019-10-13 23:01:49,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4caf3c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:49, skipping insertion in model container [2019-10-13 23:01:49,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:49" (1/1) ... [2019-10-13 23:01:49,250 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:01:49,331 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:01:50,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:50,112 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:01:50,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:50,339 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:01:50,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50 WrapperNode [2019-10-13 23:01:50,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:50,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:01:50,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:01:50,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:01:50,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:01:50,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:01:50,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:01:50,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:01:50,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:50,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:01:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:01:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:50,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:01:50,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:01:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:01:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:01:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:01:50,652 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:01:50,653 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:01:50,653 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:01:50,653 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:01:50,654 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:01:50,654 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:01:50,654 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:01:50,654 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:01:50,655 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:01:50,655 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:01:50,655 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:01:50,655 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:01:50,656 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:01:50,656 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:01:50,656 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:01:50,656 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:01:50,657 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:01:50,657 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:01:50,657 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:01:50,657 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:01:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:01:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:01:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:01:50,658 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:01:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 23:01:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:01:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 23:01:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:01:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:01:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:01:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:01:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:01:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:01:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:01:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:01:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:01:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:01:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:01:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:01:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:01:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:01:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:01:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:01:50,662 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:01:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:01:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:01:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:01:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:01:50,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:01:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:01:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:01:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:01:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:01:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:01:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:01:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:01:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:01:50,665 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:01:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:01:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:01:50,666 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:01:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:01:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:01:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:01:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:01:50,667 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:01:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:01:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:01:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:01:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:01:50,668 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:01:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:01:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:01:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:01:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:01:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:01:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:01:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:01:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:01:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:01:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:01:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:01:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:01:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:01:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:01:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:01:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:01:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:01:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:01:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:01:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:01:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:01:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:01:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:01:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:01:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:01:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:01:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:01:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:01:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:01:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:01:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:01:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:01:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:01:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:01:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:01:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:01:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:01:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:01:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:01:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:01:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:01:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:01:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:01:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:01:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:01:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:01:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:01:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 23:01:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:01:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 23:01:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 23:01:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:01:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:01:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:01:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:01:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:01:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:01:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:01:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:01:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:01:56,006 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:01:56,007 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:01:56,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:56 BoogieIcfgContainer [2019-10-13 23:01:56,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:01:56,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:01:56,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:01:56,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:01:56,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:01:49" (1/3) ... [2019-10-13 23:01:56,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ade110d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:56, skipping insertion in model container [2019-10-13 23:01:56,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50" (2/3) ... [2019-10-13 23:01:56,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ade110d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:56, skipping insertion in model container [2019-10-13 23:01:56,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:56" (3/3) ... [2019-10-13 23:01:56,017 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2019-10-13 23:01:56,028 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:01:56,038 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:01:56,050 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:01:56,082 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:01:56,083 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:01:56,083 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:01:56,083 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:01:56,083 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:01:56,083 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:01:56,083 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:01:56,084 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:01:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states. [2019-10-13 23:01:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 23:01:56,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:56,145 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:56,149 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1771794574, now seen corresponding path program 1 times [2019-10-13 23:01:56,168 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:56,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622464810] [2019-10-13 23:01:56,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:56,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:56,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:01:56,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622464810] [2019-10-13 23:01:56,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674134460] [2019-10-13 23:01:56,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:57,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 23:01:57,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:01:57,686 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:01:57,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:01:57,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-10-13 23:01:57,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048249337] [2019-10-13 23:01:57,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:01:57,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:01:57,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:01:57,874 INFO L87 Difference]: Start difference. First operand 631 states. Second operand 2 states. [2019-10-13 23:01:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:58,017 INFO L93 Difference]: Finished difference Result 1000 states and 1512 transitions. [2019-10-13 23:01:58,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:01:58,020 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 95 [2019-10-13 23:01:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:58,054 INFO L225 Difference]: With dead ends: 1000 [2019-10-13 23:01:58,054 INFO L226 Difference]: Without dead ends: 508 [2019-10-13 23:01:58,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:01:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2019-10-13 23:01:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2019-10-13 23:01:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2019-10-13 23:01:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 752 transitions. [2019-10-13 23:01:58,219 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 752 transitions. Word has length 95 [2019-10-13 23:01:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:58,222 INFO L462 AbstractCegarLoop]: Abstraction has 508 states and 752 transitions. [2019-10-13 23:01:58,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:01:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 752 transitions. [2019-10-13 23:01:58,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 23:01:58,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:58,234 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:58,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:58,442 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1084400178, now seen corresponding path program 1 times [2019-10-13 23:01:58,443 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:58,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309845517] [2019-10-13 23:01:58,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:58,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:58,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:01:58,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309845517] [2019-10-13 23:01:58,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640481577] [2019-10-13 23:01:58,855 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 [2019-10-13 23:01:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:59,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 2848 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:01:59,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:01:59,677 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:01:59,970 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:01:59,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 23:01:59,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406021516] [2019-10-13 23:01:59,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:01:59,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:59,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:01:59,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:01:59,973 INFO L87 Difference]: Start difference. First operand 508 states and 752 transitions. Second operand 4 states. [2019-10-13 23:02:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:01,025 INFO L93 Difference]: Finished difference Result 1915 states and 2904 transitions. [2019-10-13 23:02:01,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:01,026 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2019-10-13 23:02:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:01,041 INFO L225 Difference]: With dead ends: 1915 [2019-10-13 23:02:01,042 INFO L226 Difference]: Without dead ends: 1444 [2019-10-13 23:02:01,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2019-10-13 23:02:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1356. [2019-10-13 23:02:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1356 states. [2019-10-13 23:02:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2062 transitions. [2019-10-13 23:02:01,145 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2062 transitions. Word has length 95 [2019-10-13 23:02:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:01,146 INFO L462 AbstractCegarLoop]: Abstraction has 1356 states and 2062 transitions. [2019-10-13 23:02:01,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2062 transitions. [2019-10-13 23:02:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 23:02:01,164 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:01,164 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2019-10-13 23:02:01,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:01,373 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:01,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash 440506225, now seen corresponding path program 1 times [2019-10-13 23:02:01,373 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:01,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322624354] [2019-10-13 23:02:01,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:01,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:01,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:02:01,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322624354] [2019-10-13 23:02:01,673 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:01,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:01,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319525787] [2019-10-13 23:02:01,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:01,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:01,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:01,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:01,675 INFO L87 Difference]: Start difference. First operand 1356 states and 2062 transitions. Second operand 7 states. [2019-10-13 23:02:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:06,281 INFO L93 Difference]: Finished difference Result 4103 states and 6335 transitions. [2019-10-13 23:02:06,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:02:06,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-13 23:02:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:06,305 INFO L225 Difference]: With dead ends: 4103 [2019-10-13 23:02:06,306 INFO L226 Difference]: Without dead ends: 2785 [2019-10-13 23:02:06,314 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 [2019-10-13 23:02:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2019-10-13 23:02:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2690. [2019-10-13 23:02:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2019-10-13 23:02:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 4134 transitions. [2019-10-13 23:02:06,497 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 4134 transitions. Word has length 143 [2019-10-13 23:02:06,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:06,499 INFO L462 AbstractCegarLoop]: Abstraction has 2690 states and 4134 transitions. [2019-10-13 23:02:06,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 4134 transitions. [2019-10-13 23:02:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 23:02:06,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:06,506 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2019-10-13 23:02:06,507 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1565643477, now seen corresponding path program 1 times [2019-10-13 23:02:06,507 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:06,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128400620] [2019-10-13 23:02:06,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:02:06,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128400620] [2019-10-13 23:02:06,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:06,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 23:02:06,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681469377] [2019-10-13 23:02:06,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:02:06,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:02:06,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:06,938 INFO L87 Difference]: Start difference. First operand 2690 states and 4134 transitions. Second operand 10 states. [2019-10-13 23:02:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:08,368 INFO L93 Difference]: Finished difference Result 5375 states and 8288 transitions. [2019-10-13 23:02:08,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 23:02:08,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2019-10-13 23:02:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:08,403 INFO L225 Difference]: With dead ends: 5375 [2019-10-13 23:02:08,403 INFO L226 Difference]: Without dead ends: 2722 [2019-10-13 23:02:08,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-13 23:02:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2019-10-13 23:02:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2708. [2019-10-13 23:02:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2708 states. [2019-10-13 23:02:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 4114 transitions. [2019-10-13 23:02:08,654 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 4114 transitions. Word has length 146 [2019-10-13 23:02:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:08,657 INFO L462 AbstractCegarLoop]: Abstraction has 2708 states and 4114 transitions. [2019-10-13 23:02:08,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:02:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 4114 transitions. [2019-10-13 23:02:08,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 23:02:08,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:08,666 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2019-10-13 23:02:08,666 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:08,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1838617235, now seen corresponding path program 1 times [2019-10-13 23:02:08,667 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:08,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076647775] [2019-10-13 23:02:08,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:08,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:08,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:09,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076647775] [2019-10-13 23:02:09,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792601534] [2019-10-13 23:02:09,139 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 [2019-10-13 23:02:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:10,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:10,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:10,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:10,240 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:10,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 23:02:10,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291338517] [2019-10-13 23:02:10,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:10,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:10,242 INFO L87 Difference]: Start difference. First operand 2708 states and 4114 transitions. Second operand 4 states. [2019-10-13 23:02:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:10,405 INFO L93 Difference]: Finished difference Result 5427 states and 8404 transitions. [2019-10-13 23:02:10,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:10,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-13 23:02:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:10,433 INFO L225 Difference]: With dead ends: 5427 [2019-10-13 23:02:10,433 INFO L226 Difference]: Without dead ends: 2756 [2019-10-13 23:02:10,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2019-10-13 23:02:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2756. [2019-10-13 23:02:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2756 states. [2019-10-13 23:02:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4162 transitions. [2019-10-13 23:02:10,641 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4162 transitions. Word has length 147 [2019-10-13 23:02:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:10,642 INFO L462 AbstractCegarLoop]: Abstraction has 2756 states and 4162 transitions. [2019-10-13 23:02:10,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4162 transitions. [2019-10-13 23:02:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 23:02:10,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:10,647 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2019-10-13 23:02:10,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:10,856 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:10,856 INFO L82 PathProgramCache]: Analyzing trace with hash 159192644, now seen corresponding path program 1 times [2019-10-13 23:02:10,857 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:10,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145211111] [2019-10-13 23:02:10,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:10,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:10,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:11,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145211111] [2019-10-13 23:02:11,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324934679] [2019-10-13 23:02:11,179 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 [2019-10-13 23:02:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 3219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:11,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 23:02:11,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 23:02:12,070 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:12,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-13 23:02:12,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704285530] [2019-10-13 23:02:12,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:12,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:12,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:12,074 INFO L87 Difference]: Start difference. First operand 2756 states and 4162 transitions. Second operand 5 states. [2019-10-13 23:02:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:12,257 INFO L93 Difference]: Finished difference Result 5499 states and 8444 transitions. [2019-10-13 23:02:12,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:12,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2019-10-13 23:02:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:12,281 INFO L225 Difference]: With dead ends: 5499 [2019-10-13 23:02:12,282 INFO L226 Difference]: Without dead ends: 2748 [2019-10-13 23:02:12,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2019-10-13 23:02:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2748. [2019-10-13 23:02:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2748 states. [2019-10-13 23:02:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 4130 transitions. [2019-10-13 23:02:12,451 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 4130 transitions. Word has length 149 [2019-10-13 23:02:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:12,455 INFO L462 AbstractCegarLoop]: Abstraction has 2748 states and 4130 transitions. [2019-10-13 23:02:12,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 4130 transitions. [2019-10-13 23:02:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 23:02:12,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:12,464 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 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] [2019-10-13 23:02:12,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:12,681 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 546800277, now seen corresponding path program 1 times [2019-10-13 23:02:12,681 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:12,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503983454] [2019-10-13 23:02:12,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:12,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:12,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503983454] [2019-10-13 23:02:12,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189362790] [2019-10-13 23:02:12,966 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 [2019-10-13 23:02:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:13,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 3223 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:13,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:13,624 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:13,861 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:13,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-10-13 23:02:13,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944034883] [2019-10-13 23:02:13,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:13,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:13,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:13,863 INFO L87 Difference]: Start difference. First operand 2748 states and 4130 transitions. Second operand 5 states. [2019-10-13 23:02:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:15,238 INFO L93 Difference]: Finished difference Result 6956 states and 10897 transitions. [2019-10-13 23:02:15,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:15,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-13 23:02:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:15,267 INFO L225 Difference]: With dead ends: 6956 [2019-10-13 23:02:15,267 INFO L226 Difference]: Without dead ends: 4245 [2019-10-13 23:02:15,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:02:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2019-10-13 23:02:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4184. [2019-10-13 23:02:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4184 states. [2019-10-13 23:02:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4184 states to 4184 states and 6343 transitions. [2019-10-13 23:02:15,588 INFO L78 Accepts]: Start accepts. Automaton has 4184 states and 6343 transitions. Word has length 150 [2019-10-13 23:02:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:15,588 INFO L462 AbstractCegarLoop]: Abstraction has 4184 states and 6343 transitions. [2019-10-13 23:02:15,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4184 states and 6343 transitions. [2019-10-13 23:02:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 23:02:15,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:15,594 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 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] [2019-10-13 23:02:15,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:15,801 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1184688602, now seen corresponding path program 1 times [2019-10-13 23:02:15,802 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:15,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610510581] [2019-10-13 23:02:15,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:15,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:15,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:16,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610510581] [2019-10-13 23:02:16,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308352650] [2019-10-13 23:02:16,039 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 [2019-10-13 23:02:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:16,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:02:16,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:02:16,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:02:17,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:17,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2019-10-13 23:02:17,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94378660] [2019-10-13 23:02:17,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:17,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:17,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:17,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:02:17,082 INFO L87 Difference]: Start difference. First operand 4184 states and 6343 transitions. Second operand 7 states. [2019-10-13 23:02:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:18,966 INFO L93 Difference]: Finished difference Result 9473 states and 14880 transitions. [2019-10-13 23:02:18,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:02:18,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2019-10-13 23:02:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:19,011 INFO L225 Difference]: With dead ends: 9473 [2019-10-13 23:02:19,011 INFO L226 Difference]: Without dead ends: 5326 [2019-10-13 23:02:19,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 291 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-13 23:02:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2019-10-13 23:02:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5280. [2019-10-13 23:02:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5280 states. [2019-10-13 23:02:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5280 states to 5280 states and 8354 transitions. [2019-10-13 23:02:19,404 INFO L78 Accepts]: Start accepts. Automaton has 5280 states and 8354 transitions. Word has length 151 [2019-10-13 23:02:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:19,404 INFO L462 AbstractCegarLoop]: Abstraction has 5280 states and 8354 transitions. [2019-10-13 23:02:19,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5280 states and 8354 transitions. [2019-10-13 23:02:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 23:02:19,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:19,410 INFO L380 BasicCegarLoop]: trace histogram [2, 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] [2019-10-13 23:02:19,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:19,621 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash -19027897, now seen corresponding path program 1 times [2019-10-13 23:02:19,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:19,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061199524] [2019-10-13 23:02:19,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:19,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:19,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:02:19,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061199524] [2019-10-13 23:02:19,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436195931] [2019-10-13 23:02:19,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:20,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 3226 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:20,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 23:02:20,665 INFO L321 TraceCheckSpWp]: Computing backward predicates...