/usr/bin/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_product09.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:11:23,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:11:23,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:11:23,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:11:23,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:11:23,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:11:23,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:11:23,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:11:23,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:11:23,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:11:23,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:11:23,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:11:23,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:11:23,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:11:23,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:11:23,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:11:23,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:11:23,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:11:23,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:11:23,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:11:23,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:11:23,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:11:23,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:11:23,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:11:23,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:11:23,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:11:23,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:11:23,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:11:23,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:11:23,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:11:23,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:11:23,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:11:23,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:11:23,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:11:23,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:11:23,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:11:23,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:11:23,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:11:23,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:11:23,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:11:23,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:11:23,345 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 [2019-11-07 04:11:23,375 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:11:23,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:11:23,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:11:23,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:11:23,378 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:11:23,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:11:23,379 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:11:23,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:11:23,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:11:23,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:11:23,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:11:23,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:11:23,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:11:23,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:11:23,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:11:23,382 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:11:23,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:11:23,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:11:23,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:11:23,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:11:23,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:11:23,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:11:23,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:11:23,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:11:23,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:11:23,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:11:23,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:11:23,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:11:23,384 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 [2019-11-07 04:11:23,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:11:23,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:11:23,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:11:23,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:11:23,705 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:11:23,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product09.cil.c [2019-11-07 04:11:23,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24d5717e7/61da6c2ccbd3473d898ddc67746dd96c/FLAGec9254449 [2019-11-07 04:11:24,458 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:11:24,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product09.cil.c [2019-11-07 04:11:24,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24d5717e7/61da6c2ccbd3473d898ddc67746dd96c/FLAGec9254449 [2019-11-07 04:11:24,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24d5717e7/61da6c2ccbd3473d898ddc67746dd96c [2019-11-07 04:11:24,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:11:24,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:11:24,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:11:24,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:11:24,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:11:24,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:11:24" (1/1) ... [2019-11-07 04:11:24,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa101a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:24, skipping insertion in model container [2019-11-07 04:11:24,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:11:24" (1/1) ... [2019-11-07 04:11:24,673 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:11:24,760 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:11:25,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:11:25,518 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:11:25,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:11:25,741 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:11:25,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25 WrapperNode [2019-11-07 04:11:25,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:11:25,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:11:25,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:11:25,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:11:25,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (1/1) ... [2019-11-07 04:11:25,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:11:25,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:11:25,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:11:25,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:11:25,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (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 [2019-11-07 04:11:26,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:11:26,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:11:26,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:11:26,024 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:11:26,024 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:11:26,026 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:11:26,026 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:11:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:11:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:11:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:11:26,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:11:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:11:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:11:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:11:26,029 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:11:26,030 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:11:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:11:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:11:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:11:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:11:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:11:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:11:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:11:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:11:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:11:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:11:26,034 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:11:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:11:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:11:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:11:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:11:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:11:26,035 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:11:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:11:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:11:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:11:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:11:26,036 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:11:26,037 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:11:26,037 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:11:26,037 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:11:26,037 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:11:26,037 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:11:26,038 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:11:26,038 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:11:26,038 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:11:26,038 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:11:26,038 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:11:26,040 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:11:26,040 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:11:26,040 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:11:26,040 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:11:26,040 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:11:26,041 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:11:26,041 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:11:26,041 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:11:26,041 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:11:26,042 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:11:26,042 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:11:26,043 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:11:26,043 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:11:26,044 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:11:26,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:11:26,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 04:11:26,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 04:11:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:11:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:11:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:11:26,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:11:26,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:11:26,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:11:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:11:26,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:11:26,047 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:11:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:11:26,048 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:11:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:11:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:11:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:11:26,049 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:11:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:11:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:11:26,050 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:11:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:11:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:11:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:11:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:11:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:11:26,051 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:11:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:11:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:11:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:11:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:11:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:11:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:11:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:11:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:11:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:11:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:11:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:11:26,054 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:11:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:11:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:11:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:11:26,055 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:11:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:11:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:11:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:11:26,056 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:11:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:11:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:11:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:11:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:11:26,057 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:11:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:11:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 04:11:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 04:11:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:11:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:11:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:11:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:11:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:11:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:11:26,063 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:11:26,065 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:11:26,065 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:11:26,065 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:11:26,065 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:11:26,065 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:11:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:11:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:11:26,066 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:11:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:11:26,067 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:11:26,071 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:11:26,071 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:11:26,071 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:11:26,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:11:26,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:11:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:11:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:11:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:11:26,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:11:26,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:11:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:11:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:11:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:11:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:11:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:11:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:11:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:11:31,092 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:11:31,093 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:11:31,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:11:31 BoogieIcfgContainer [2019-11-07 04:11:31,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:11:31,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:11:31,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:11:31,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:11:31,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:11:24" (1/3) ... [2019-11-07 04:11:31,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b705575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:11:31, skipping insertion in model container [2019-11-07 04:11:31,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:11:25" (2/3) ... [2019-11-07 04:11:31,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b705575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:11:31, skipping insertion in model container [2019-11-07 04:11:31,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:11:31" (3/3) ... [2019-11-07 04:11:31,107 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2019-11-07 04:11:31,119 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:11:31,133 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:11:31,146 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:11:31,197 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:11:31,197 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:11:31,197 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:11:31,197 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:11:31,197 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:11:31,197 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:11:31,198 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:11:31,198 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:11:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states. [2019-11-07 04:11:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 04:11:31,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:31,259 INFO L410 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] [2019-11-07 04:11:31,261 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash -843125818, now seen corresponding path program 1 times [2019-11-07 04:11:31,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:31,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936739184] [2019-11-07 04:11:31,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:11:32,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936739184] [2019-11-07 04:11:32,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603554377] [2019-11-07 04:11:32,068 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 [2019-11-07 04:11:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:32,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:11:32,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:11:32,861 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:32,977 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:32,978 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 04:11:32,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023173513] [2019-11-07 04:11:32,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:11:32,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:33,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:11:33,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:33,004 INFO L87 Difference]: Start difference. First operand 561 states. Second operand 3 states. [2019-11-07 04:11:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:33,264 INFO L93 Difference]: Finished difference Result 1203 states and 1865 transitions. [2019-11-07 04:11:33,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:11:33,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-11-07 04:11:33,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:33,314 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 04:11:33,314 INFO L226 Difference]: Without dead ends: 774 [2019-11-07 04:11:33,324 INFO L630 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 [2019-11-07 04:11:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-11-07 04:11:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 761. [2019-11-07 04:11:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-07 04:11:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1165 transitions. [2019-11-07 04:11:33,499 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1165 transitions. Word has length 98 [2019-11-07 04:11:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:33,502 INFO L462 AbstractCegarLoop]: Abstraction has 761 states and 1165 transitions. [2019-11-07 04:11:33,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:11:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1165 transitions. [2019-11-07 04:11:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 04:11:33,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:33,518 INFO L410 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] [2019-11-07 04:11:33,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:33,731 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:33,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash -846004538, now seen corresponding path program 1 times [2019-11-07 04:11:33,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:33,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19994713] [2019-11-07 04:11:33,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:34,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19994713] [2019-11-07 04:11:34,077 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:11:34,077 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:11:34,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950026317] [2019-11-07 04:11:34,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:11:34,081 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:34,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:11:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:34,082 INFO L87 Difference]: Start difference. First operand 761 states and 1165 transitions. Second operand 8 states. [2019-11-07 04:11:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:34,226 INFO L93 Difference]: Finished difference Result 1505 states and 2333 transitions. [2019-11-07 04:11:34,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 04:11:34,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-11-07 04:11:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:34,239 INFO L225 Difference]: With dead ends: 1505 [2019-11-07 04:11:34,239 INFO L226 Difference]: Without dead ends: 775 [2019-11-07 04:11:34,245 INFO L630 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 [2019-11-07 04:11:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2019-11-07 04:11:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 769. [2019-11-07 04:11:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2019-11-07 04:11:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1173 transitions. [2019-11-07 04:11:34,327 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1173 transitions. Word has length 99 [2019-11-07 04:11:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:34,328 INFO L462 AbstractCegarLoop]: Abstraction has 769 states and 1173 transitions. [2019-11-07 04:11:34,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:11:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1173 transitions. [2019-11-07 04:11:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-07 04:11:34,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:34,335 INFO L410 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] [2019-11-07 04:11:34,335 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash 535744625, now seen corresponding path program 1 times [2019-11-07 04:11:34,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:34,340 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986724631] [2019-11-07 04:11:34,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:34,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986724631] [2019-11-07 04:11:34,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516270793] [2019-11-07 04:11:34,597 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 [2019-11-07 04:11:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:35,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:11:35,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:35,285 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:35,410 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:35,410 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 10 [2019-11-07 04:11:35,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177381428] [2019-11-07 04:11:35,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:11:35,411 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:11:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:11:35,412 INFO L87 Difference]: Start difference. First operand 769 states and 1173 transitions. Second operand 5 states. [2019-11-07 04:11:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:37,041 INFO L93 Difference]: Finished difference Result 2894 states and 4479 transitions. [2019-11-07 04:11:37,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:11:37,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-11-07 04:11:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:37,063 INFO L225 Difference]: With dead ends: 2894 [2019-11-07 04:11:37,064 INFO L226 Difference]: Without dead ends: 2156 [2019-11-07 04:11:37,074 INFO L630 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 [2019-11-07 04:11:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2019-11-07 04:11:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2106. [2019-11-07 04:11:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2019-11-07 04:11:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3172 transitions. [2019-11-07 04:11:37,225 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3172 transitions. Word has length 103 [2019-11-07 04:11:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:37,227 INFO L462 AbstractCegarLoop]: Abstraction has 2106 states and 3172 transitions. [2019-11-07 04:11:37,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:11:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3172 transitions. [2019-11-07 04:11:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-07 04:11:37,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:37,237 INFO L410 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] [2019-11-07 04:11:37,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:37,445 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1662512205, now seen corresponding path program 1 times [2019-11-07 04:11:37,446 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:37,446 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010328576] [2019-11-07 04:11:37,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:37,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010328576] [2019-11-07 04:11:37,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023198285] [2019-11-07 04:11:37,673 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 [2019-11-07 04:11:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:38,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 04:11:38,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:38,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:38,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:38,625 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:38,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-07 04:11:38,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58555419] [2019-11-07 04:11:38,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:11:38,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:11:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:38,628 INFO L87 Difference]: Start difference. First operand 2106 states and 3172 transitions. Second operand 7 states. [2019-11-07 04:11:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:39,374 INFO L93 Difference]: Finished difference Result 3905 states and 5917 transitions. [2019-11-07 04:11:39,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:11:39,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2019-11-07 04:11:39,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:39,393 INFO L225 Difference]: With dead ends: 3905 [2019-11-07 04:11:39,394 INFO L226 Difference]: Without dead ends: 2348 [2019-11-07 04:11:39,403 INFO L630 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 [2019-11-07 04:11:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-11-07 04:11:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2250. [2019-11-07 04:11:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-11-07 04:11:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3372 transitions. [2019-11-07 04:11:39,520 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3372 transitions. Word has length 107 [2019-11-07 04:11:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:39,521 INFO L462 AbstractCegarLoop]: Abstraction has 2250 states and 3372 transitions. [2019-11-07 04:11:39,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:11:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3372 transitions. [2019-11-07 04:11:39,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 04:11:39,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:39,524 INFO L410 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] [2019-11-07 04:11:39,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:39,732 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:39,735 INFO L82 PathProgramCache]: Analyzing trace with hash 929761059, now seen corresponding path program 1 times [2019-11-07 04:11:39,736 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:39,736 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801155614] [2019-11-07 04:11:39,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:39,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801155614] [2019-11-07 04:11:39,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030300903] [2019-11-07 04:11:39,953 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 [2019-11-07 04:11:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:40,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:11:40,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:40,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:40,718 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:40,718 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2019-11-07 04:11:40,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719145901] [2019-11-07 04:11:40,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:11:40,719 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:11:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:11:40,719 INFO L87 Difference]: Start difference. First operand 2250 states and 3372 transitions. Second operand 5 states. [2019-11-07 04:11:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:40,931 INFO L93 Difference]: Finished difference Result 4247 states and 6472 transitions. [2019-11-07 04:11:40,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:11:40,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-11-07 04:11:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:40,947 INFO L225 Difference]: With dead ends: 4247 [2019-11-07 04:11:40,947 INFO L226 Difference]: Without dead ends: 2250 [2019-11-07 04:11:40,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:11:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2019-11-07 04:11:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2019-11-07 04:11:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-11-07 04:11:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3330 transitions. [2019-11-07 04:11:41,065 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3330 transitions. Word has length 108 [2019-11-07 04:11:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:41,065 INFO L462 AbstractCegarLoop]: Abstraction has 2250 states and 3330 transitions. [2019-11-07 04:11:41,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:11:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3330 transitions. [2019-11-07 04:11:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:11:41,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:41,069 INFO L410 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] [2019-11-07 04:11:41,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:41,277 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1432817663, now seen corresponding path program 1 times [2019-11-07 04:11:41,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:41,278 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040095204] [2019-11-07 04:11:41,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:11:41,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040095204] [2019-11-07 04:11:41,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403555360] [2019-11-07 04:11:41,466 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 [2019-11-07 04:11:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:42,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 2948 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-07 04:11:42,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:42,445 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:42,822 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-11-07 04:11:43,254 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-11-07 04:11:43,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:43,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:43,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:43,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:43,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:11:43,345 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:11:43,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 13 [2019-11-07 04:11:43,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920121389] [2019-11-07 04:11:43,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:11:43,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:11:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:11:43,346 INFO L87 Difference]: Start difference. First operand 2250 states and 3330 transitions. Second operand 6 states. [2019-11-07 04:11:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:45,082 INFO L93 Difference]: Finished difference Result 6605 states and 9985 transitions. [2019-11-07 04:11:45,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:11:45,083 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-11-07 04:11:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:45,117 INFO L225 Difference]: With dead ends: 6605 [2019-11-07 04:11:45,117 INFO L226 Difference]: Without dead ends: 4386 [2019-11-07 04:11:45,134 INFO L630 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 [2019-11-07 04:11:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2019-11-07 04:11:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4230. [2019-11-07 04:11:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4230 states. [2019-11-07 04:11:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 6339 transitions. [2019-11-07 04:11:45,354 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 6339 transitions. Word has length 110 [2019-11-07 04:11:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:45,354 INFO L462 AbstractCegarLoop]: Abstraction has 4230 states and 6339 transitions. [2019-11-07 04:11:45,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:11:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 6339 transitions. [2019-11-07 04:11:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-07 04:11:45,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:45,360 INFO L410 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, 1] [2019-11-07 04:11:45,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:45,570 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1731626062, now seen corresponding path program 1 times [2019-11-07 04:11:45,571 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:45,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357369388] [2019-11-07 04:11:45,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:11:45,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357369388] [2019-11-07 04:11:45,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:11:45,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 04:11:45,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775666877] [2019-11-07 04:11:45,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:11:45,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:45,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:11:45,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:11:45,791 INFO L87 Difference]: Start difference. First operand 4230 states and 6339 transitions. Second operand 8 states. [2019-11-07 04:11:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:48,578 INFO L93 Difference]: Finished difference Result 10918 states and 16571 transitions. [2019-11-07 04:11:48,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 04:11:48,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2019-11-07 04:11:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:48,645 INFO L225 Difference]: With dead ends: 10918 [2019-11-07 04:11:48,646 INFO L226 Difference]: Without dead ends: 6719 [2019-11-07 04:11:48,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:11:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6719 states. [2019-11-07 04:11:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6719 to 6695. [2019-11-07 04:11:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6695 states. [2019-11-07 04:11:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 10154 transitions. [2019-11-07 04:11:49,104 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 10154 transitions. Word has length 112 [2019-11-07 04:11:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:49,109 INFO L462 AbstractCegarLoop]: Abstraction has 6695 states and 10154 transitions. [2019-11-07 04:11:49,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:11:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 10154 transitions. [2019-11-07 04:11:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:11:49,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:49,113 INFO L410 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] [2019-11-07 04:11:49,113 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:49,114 INFO L82 PathProgramCache]: Analyzing trace with hash -701252849, now seen corresponding path program 1 times [2019-11-07 04:11:49,114 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:49,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574511476] [2019-11-07 04:11:49,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:49,396 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574511476] [2019-11-07 04:11:49,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316996133] [2019-11-07 04:11:49,397 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 [2019-11-07 04:11:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:49,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 2938 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:11:49,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 04:11:50,054 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:11:50,149 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:11:50,150 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 04:11:50,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811453149] [2019-11-07 04:11:50,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:11:50,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:11:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:50,157 INFO L87 Difference]: Start difference. First operand 6695 states and 10154 transitions. Second operand 3 states. [2019-11-07 04:11:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:11:50,590 INFO L93 Difference]: Finished difference Result 15051 states and 23261 transitions. [2019-11-07 04:11:50,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:11:50,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-11-07 04:11:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:11:50,697 INFO L225 Difference]: With dead ends: 15051 [2019-11-07 04:11:50,697 INFO L226 Difference]: Without dead ends: 8387 [2019-11-07 04:11:50,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:11:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8387 states. [2019-11-07 04:11:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8387 to 8173. [2019-11-07 04:11:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8173 states. [2019-11-07 04:11:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8173 states to 8173 states and 12360 transitions. [2019-11-07 04:11:51,256 INFO L78 Accepts]: Start accepts. Automaton has 8173 states and 12360 transitions. Word has length 110 [2019-11-07 04:11:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:11:51,256 INFO L462 AbstractCegarLoop]: Abstraction has 8173 states and 12360 transitions. [2019-11-07 04:11:51,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:11:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 8173 states and 12360 transitions. [2019-11-07 04:11:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 04:11:51,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:11:51,262 INFO L410 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] [2019-11-07 04:11:51,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:11:51,474 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:11:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:11:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1650288734, now seen corresponding path program 1 times [2019-11-07 04:11:51,475 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:11:51,475 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633036464] [2019-11-07 04:11:51,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:11:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 04:11:51,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633036464] [2019-11-07 04:11:51,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428889155] [2019-11-07 04:11:51,730 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 [2019-11-07 04:11:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:11:52,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-07 04:11:52,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:11:53,223 WARN L191 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-11-07 04:11:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:11:53,270 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:11:53,659 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-11-07 04:11:54,095 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-11-07 04:11:54,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:54,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:54,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:54,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:54,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:11:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 04:11:54,210 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:11:54,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 16 [2019-11-07 04:11:54,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741210680] [2019-11-07 04:11:54,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:11:54,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:11:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:11:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-07 04:11:54,211 INFO L87 Difference]: Start difference. First operand 8173 states and 12360 transitions. Second operand 6 states.