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_spec3_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:04:43,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:04:43,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:04:43,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:04:43,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:04:43,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:04:43,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:04:43,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:04:43,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:04:43,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:04:43,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:04:43,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:04:43,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:04:43,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:04:43,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:04:43,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:04:43,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:04:43,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:04:43,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:04:43,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:04:43,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:04:43,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:04:43,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:04:43,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:04:43,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:04:43,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:04:43,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:04:43,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:04:43,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:04:43,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:04:43,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:04:43,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:04:43,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:04:43,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:04:43,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:04:43,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:04:43,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:04:43,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:04:43,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:04:43,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:04:43,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:04:43,453 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 23:04:43,475 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:04:43,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:04:43,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:04:43,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:04:43,477 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:04:43,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:04:43,478 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:04:43,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:04:43,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:04:43,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:04:43,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:04:43,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:04:43,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:04:43,479 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:04:43,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:04:43,479 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:04:43,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:04:43,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:04:43,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:04:43,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:04:43,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:04:43,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:04:43,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:04:43,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:04:43,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:04:43,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:04:43,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:04:43,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:04:43,482 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 23:04:43,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:04:43,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:04:43,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:04:43,812 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:04:43,813 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:04:43,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-10-13 23:04:43,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cedfc8151/39f733d479174f4dbc622c0b5df4f254/FLAG5e82fbfdf [2019-10-13 23:04:44,592 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:04:44,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product17.cil.c [2019-10-13 23:04:44,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cedfc8151/39f733d479174f4dbc622c0b5df4f254/FLAG5e82fbfdf [2019-10-13 23:04:44,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cedfc8151/39f733d479174f4dbc622c0b5df4f254 [2019-10-13 23:04:44,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:04:44,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:04:44,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:44,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:04:44,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:04:44,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:44" (1/1) ... [2019-10-13 23:04:44,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7608d17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:44, skipping insertion in model container [2019-10-13 23:04:44,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:04:44" (1/1) ... [2019-10-13 23:04:44,774 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:04:44,841 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:04:45,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:45,561 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:04:45,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:04:45,788 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:04:45,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45 WrapperNode [2019-10-13 23:04:45,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:04:45,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:04:45,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:04:45,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:04:45,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (1/1) ... [2019-10-13 23:04:45,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:04:45,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:04:45,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:04:45,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:04:45,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (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 23:04:46,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:04:46,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:04:46,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:46,061 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:04:46,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:46,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:46,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:04:46,063 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:04:46,063 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:04:46,064 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:04:46,064 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:04:46,065 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:04:46,065 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:04:46,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:04:46,066 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:04:46,066 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:04:46,068 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:04:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:04:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:04:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:04:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:04:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:04:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:04:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:04:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:04:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:04:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:04:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:04:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:04:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:04:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:04:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:04:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:04:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:04:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:04:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:04:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:04:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:04:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:04:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:04:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:04:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:04:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:04:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:04:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:04:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:04:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:04:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:04:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:04:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:04:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:04:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:04:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:04:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:04:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:04:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:04:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:04:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:04:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:04:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:04:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:04:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:04:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:04:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:04:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:04:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:04:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:04:46,081 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:04:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:04:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:04:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:04:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:04:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:04:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:04:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:04:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:04:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:04:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:04:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:04:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-13 23:04:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-13 23:04:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:04:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:04:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:04:46,087 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:04:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:04:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:04:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:04:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:04:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:04:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:04:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:04:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:04:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:04:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:04:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:04:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:04:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:04:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:04:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:04:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:04:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:04:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:04:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:04:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:04:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:04:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:04:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:04:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:04:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:04:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:04:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:04:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:04:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:04:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:04:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:04:46,095 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:04:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:04:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:04:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:04:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:04:46,096 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:04:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:04:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:04:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:04:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:04:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:04:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:04:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:04:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:04:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:04:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:04:46,103 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:04:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:04:46,104 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:04:46,105 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:04:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:04:46,112 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:04:46,112 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:04:46,112 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:04:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:04:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:04:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:04:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:04:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:04:51,284 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:04:51,284 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:04:51,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:51 BoogieIcfgContainer [2019-10-13 23:04:51,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:04:51,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:04:51,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:04:51,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:04:51,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:04:44" (1/3) ... [2019-10-13 23:04:51,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5347f2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:51, skipping insertion in model container [2019-10-13 23:04:51,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:04:45" (2/3) ... [2019-10-13 23:04:51,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5347f2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:04:51, skipping insertion in model container [2019-10-13 23:04:51,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:04:51" (3/3) ... [2019-10-13 23:04:51,303 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2019-10-13 23:04:51,312 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:04:51,322 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:04:51,334 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:04:51,371 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:04:51,371 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:04:51,372 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:04:51,372 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:04:51,372 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:04:51,372 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:04:51,372 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:04:51,372 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:04:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states. [2019-10-13 23:04:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 23:04:51,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:51,431 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, 1, 1, 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 23:04:51,433 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:51,438 INFO L82 PathProgramCache]: Analyzing trace with hash -656663885, now seen corresponding path program 1 times [2019-10-13 23:04:51,446 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:51,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966203935] [2019-10-13 23:04:51,446 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:51,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:51,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:04:52,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966203935] [2019-10-13 23:04:52,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263921842] [2019-10-13 23:04:52,195 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 23:04:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:52,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 2943 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:04:52,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:04:52,924 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:04:53,061 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:53,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:04:53,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800243530] [2019-10-13 23:04:53,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:04:53,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:53,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:04:53,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:53,088 INFO L87 Difference]: Start difference. First operand 566 states. Second operand 3 states. [2019-10-13 23:04:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:53,286 INFO L93 Difference]: Finished difference Result 1218 states and 1883 transitions. [2019-10-13 23:04:53,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:04:53,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-13 23:04:53,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:53,320 INFO L225 Difference]: With dead ends: 1218 [2019-10-13 23:04:53,320 INFO L226 Difference]: Without dead ends: 784 [2019-10-13 23:04:53,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2019-10-13 23:04:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 771. [2019-10-13 23:04:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2019-10-13 23:04:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1177 transitions. [2019-10-13 23:04:53,480 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1177 transitions. Word has length 98 [2019-10-13 23:04:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:53,481 INFO L462 AbstractCegarLoop]: Abstraction has 771 states and 1177 transitions. [2019-10-13 23:04:53,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:04:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1177 transitions. [2019-10-13 23:04:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 23:04:53,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:53,494 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, 1, 1, 1, 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 23:04:53,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:53,714 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash -768869353, now seen corresponding path program 1 times [2019-10-13 23:04:53,716 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:53,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928926143] [2019-10-13 23:04:53,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:53,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:53,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:04:54,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928926143] [2019-10-13 23:04:54,049 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:04:54,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:04:54,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658602460] [2019-10-13 23:04:54,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:04:54,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:04:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:54,053 INFO L87 Difference]: Start difference. First operand 771 states and 1177 transitions. Second operand 8 states. [2019-10-13 23:04:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:54,207 INFO L93 Difference]: Finished difference Result 1525 states and 2357 transitions. [2019-10-13 23:04:54,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:04:54,209 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-10-13 23:04:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:54,227 INFO L225 Difference]: With dead ends: 1525 [2019-10-13 23:04:54,227 INFO L226 Difference]: Without dead ends: 785 [2019-10-13 23:04:54,232 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:04:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2019-10-13 23:04:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 779. [2019-10-13 23:04:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2019-10-13 23:04:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1185 transitions. [2019-10-13 23:04:54,327 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1185 transitions. Word has length 99 [2019-10-13 23:04:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:54,327 INFO L462 AbstractCegarLoop]: Abstraction has 779 states and 1185 transitions. [2019-10-13 23:04:54,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:04:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1185 transitions. [2019-10-13 23:04:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 23:04:54,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:54,335 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:54,335 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2139774390, now seen corresponding path program 1 times [2019-10-13 23:04:54,336 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:54,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410903724] [2019-10-13 23:04:54,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:54,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:54,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:04:54,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410903724] [2019-10-13 23:04:54,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458063073] [2019-10-13 23:04:54,731 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 23:04:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:55,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:04:55,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:04:55,356 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:04:55,568 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:55,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-10-13 23:04:55,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934707391] [2019-10-13 23:04:55,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:04:55,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:55,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:04:55,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:55,572 INFO L87 Difference]: Start difference. First operand 779 states and 1185 transitions. Second operand 5 states. [2019-10-13 23:04:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:04:57,336 INFO L93 Difference]: Finished difference Result 2934 states and 4527 transitions. [2019-10-13 23:04:57,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:04:57,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-10-13 23:04:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:04:57,362 INFO L225 Difference]: With dead ends: 2934 [2019-10-13 23:04:57,363 INFO L226 Difference]: Without dead ends: 2186 [2019-10-13 23:04:57,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:04:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2019-10-13 23:04:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2136. [2019-10-13 23:04:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2136 states. [2019-10-13 23:04:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3208 transitions. [2019-10-13 23:04:57,563 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3208 transitions. Word has length 103 [2019-10-13 23:04:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:04:57,565 INFO L462 AbstractCegarLoop]: Abstraction has 2136 states and 3208 transitions. [2019-10-13 23:04:57,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:04:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3208 transitions. [2019-10-13 23:04:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 23:04:57,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:04:57,585 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:04:57,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:04:57,794 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:04:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:04:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2040806792, now seen corresponding path program 1 times [2019-10-13 23:04:57,795 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:04:57,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110503719] [2019-10-13 23:04:57,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:57,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:04:57,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:04:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:04:58,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110503719] [2019-10-13 23:04:58,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053559076] [2019-10-13 23:04:58,124 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 23:04:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:04:58,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 2981 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:04:58,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:04:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:04:58,795 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:04:58,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:04:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:04:59,028 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:04:59,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 23:04:59,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007344026] [2019-10-13 23:04:59,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:04:59,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:04:59,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:04:59,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:04:59,030 INFO L87 Difference]: Start difference. First operand 2136 states and 3208 transitions. Second operand 7 states. [2019-10-13 23:05:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:00,239 INFO L93 Difference]: Finished difference Result 3955 states and 5977 transitions. [2019-10-13 23:05:00,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:05:00,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-10-13 23:05:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:00,260 INFO L225 Difference]: With dead ends: 3955 [2019-10-13 23:05:00,260 INFO L226 Difference]: Without dead ends: 2378 [2019-10-13 23:05:00,271 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2019-10-13 23:05:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2280. [2019-10-13 23:05:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2280 states. [2019-10-13 23:05:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3408 transitions. [2019-10-13 23:05:00,426 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3408 transitions. Word has length 107 [2019-10-13 23:05:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:00,427 INFO L462 AbstractCegarLoop]: Abstraction has 2280 states and 3408 transitions. [2019-10-13 23:05:00,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:05:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3408 transitions. [2019-10-13 23:05:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 23:05:00,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:00,431 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:00,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:00,640 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:00,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1849756224, now seen corresponding path program 1 times [2019-10-13 23:05:00,642 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:00,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918499558] [2019-10-13 23:05:00,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:00,642 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:00,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:00,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918499558] [2019-10-13 23:05:00,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169582403] [2019-10-13 23:05:00,858 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 23:05:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:01,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:05:01,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:01,482 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:01,716 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:01,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-10-13 23:05:01,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891955801] [2019-10-13 23:05:01,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:05:01,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:05:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:05:01,719 INFO L87 Difference]: Start difference. First operand 2280 states and 3408 transitions. Second operand 5 states. [2019-10-13 23:05:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:01,949 INFO L93 Difference]: Finished difference Result 4297 states and 6532 transitions. [2019-10-13 23:05:01,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:05:01,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-10-13 23:05:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:01,978 INFO L225 Difference]: With dead ends: 4297 [2019-10-13 23:05:01,978 INFO L226 Difference]: Without dead ends: 2280 [2019-10-13 23:05:01,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:05:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2019-10-13 23:05:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2280. [2019-10-13 23:05:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2280 states. [2019-10-13 23:05:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3366 transitions. [2019-10-13 23:05:02,141 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3366 transitions. Word has length 108 [2019-10-13 23:05:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:02,142 INFO L462 AbstractCegarLoop]: Abstraction has 2280 states and 3366 transitions. [2019-10-13 23:05:02,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:05:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3366 transitions. [2019-10-13 23:05:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:05:02,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:02,148 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:02,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:02,358 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash -465779275, now seen corresponding path program 1 times [2019-10-13 23:05:02,359 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:02,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490571494] [2019-10-13 23:05:02,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:02,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:02,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:02,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490571494] [2019-10-13 23:05:02,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166234310] [2019-10-13 23:05:02,555 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 23:05:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:03,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 23:05:03,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:03,462 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:03,740 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-10-13 23:05:04,076 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-13 23:05:04,474 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-13 23:05:04,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:04,568 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:05:04,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2019-10-13 23:05:04,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674156763] [2019-10-13 23:05:04,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:05:04,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:04,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:05:04,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:04,571 INFO L87 Difference]: Start difference. First operand 2280 states and 3366 transitions. Second operand 6 states. [2019-10-13 23:05:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:06,026 INFO L93 Difference]: Finished difference Result 6665 states and 10057 transitions. [2019-10-13 23:05:06,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:05:06,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-13 23:05:06,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:06,066 INFO L225 Difference]: With dead ends: 6665 [2019-10-13 23:05:06,067 INFO L226 Difference]: Without dead ends: 4416 [2019-10-13 23:05:06,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:05:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4416 states. [2019-10-13 23:05:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4416 to 4260. [2019-10-13 23:05:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4260 states. [2019-10-13 23:05:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 6375 transitions. [2019-10-13 23:05:06,331 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 6375 transitions. Word has length 110 [2019-10-13 23:05:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:06,332 INFO L462 AbstractCegarLoop]: Abstraction has 4260 states and 6375 transitions. [2019-10-13 23:05:06,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:05:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 6375 transitions. [2019-10-13 23:05:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:05:06,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:06,337 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:06,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:06,604 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1388389254, now seen corresponding path program 1 times [2019-10-13 23:05:06,606 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:06,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491376063] [2019-10-13 23:05:06,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:06,608 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:06,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:05:06,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491376063] [2019-10-13 23:05:06,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805631820] [2019-10-13 23:05:06,871 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 23:05:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:07,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:05:07,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:05:07,486 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:07,585 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:07,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 23:05:07,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013931318] [2019-10-13 23:05:07,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:05:07,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:05:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:07,588 INFO L87 Difference]: Start difference. First operand 4260 states and 6375 transitions. Second operand 3 states. [2019-10-13 23:05:07,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:07,887 INFO L93 Difference]: Finished difference Result 10524 states and 16049 transitions. [2019-10-13 23:05:07,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:05:07,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-13 23:05:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:07,953 INFO L225 Difference]: With dead ends: 10524 [2019-10-13 23:05:07,953 INFO L226 Difference]: Without dead ends: 6295 [2019-10-13 23:05:07,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:05:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2019-10-13 23:05:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6129. [2019-10-13 23:05:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6129 states. [2019-10-13 23:05:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6129 states to 6129 states and 9177 transitions. [2019-10-13 23:05:08,349 INFO L78 Accepts]: Start accepts. Automaton has 6129 states and 9177 transitions. Word has length 110 [2019-10-13 23:05:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:08,355 INFO L462 AbstractCegarLoop]: Abstraction has 6129 states and 9177 transitions. [2019-10-13 23:05:08,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:05:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6129 states and 9177 transitions. [2019-10-13 23:05:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 23:05:08,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:08,360 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:05:08,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:08,570 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2040787126, now seen corresponding path program 1 times [2019-10-13 23:05:08,572 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:08,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896924275] [2019-10-13 23:05:08,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:08,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:08,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:05:08,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896924275] [2019-10-13 23:05:08,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885211586] [2019-10-13 23:05:08,941 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 23:05:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:09,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 2982 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:05:09,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:05:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:05:09,648 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:05:09,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:05:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:05:09,908 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:05:09,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [11] total 20 [2019-10-13 23:05:09,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776793450] [2019-10-13 23:05:09,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:05:09,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:05:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:05:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-13 23:05:09,911 INFO L87 Difference]: Start difference. First operand 6129 states and 9177 transitions. Second operand 11 states. [2019-10-13 23:05:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:05:14,458 INFO L93 Difference]: Finished difference Result 13848 states and 21004 transitions. [2019-10-13 23:05:14,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 23:05:14,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 111 [2019-10-13 23:05:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:05:14,530 INFO L225 Difference]: With dead ends: 13848 [2019-10-13 23:05:14,531 INFO L226 Difference]: Without dead ends: 7750 [2019-10-13 23:05:14,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2019-10-13 23:05:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7750 states. [2019-10-13 23:05:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7750 to 7697. [2019-10-13 23:05:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7697 states. [2019-10-13 23:05:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 11435 transitions. [2019-10-13 23:05:14,945 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 11435 transitions. Word has length 111 [2019-10-13 23:05:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:05:14,946 INFO L462 AbstractCegarLoop]: Abstraction has 7697 states and 11435 transitions. [2019-10-13 23:05:14,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 23:05:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 11435 transitions. [2019-10-13 23:05:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 23:05:14,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:05:14,949 INFO L380 BasicCegarLoop]: trace histogram [3, 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] [2019-10-13 23:05:15,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:05:15,165 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:05:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:05:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash 574115175, now seen corresponding path program 1 times [2019-10-13 23:05:15,165 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:05:15,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371098339] [2019-10-13 23:05:15,165 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:15,165 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:05:15,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:05:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:05:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 23:05:15,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371098339] [2019-10-13 23:05:15,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195864876] [2019-10-13 23:05:15,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true