java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:02:19,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:02:19,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:02:19,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:02:19,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:02:19,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:02:19,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:02:19,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:02:19,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:02:19,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:02:19,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:02:19,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:02:19,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:02:19,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:02:19,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:02:19,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:02:19,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:02:19,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:02:19,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:02:19,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:02:19,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:02:19,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:02:19,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:02:19,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:02:19,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:02:19,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:02:19,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:02:19,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:02:19,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:02:19,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:02:19,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:02:19,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:02:19,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:02:19,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:02:19,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:02:19,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:02:19,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:02:19,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:02:19,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:02:19,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:02:19,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:02:19,617 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 23:02:19,650 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:02:19,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:02:19,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:02:19,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:02:19,652 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:02:19,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:02:19,653 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:02:19,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:02:19,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:02:19,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:02:19,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:02:19,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:02:19,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:02:19,654 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:02:19,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:02:19,654 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:02:19,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:02:19,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:02:19,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:02:19,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:02:19,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:02:19,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:02:19,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:02:19,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:02:19,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:02:19,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:02:19,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:02:19,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:02:19,657 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 23:02:19,933 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:02:19,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:02:19,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:02:19,952 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:02:19,952 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:02:19,953 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-10-13 23:02:20,030 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc9fb526/587493053ef54f11b93b3c6fa7cfc41f/FLAG6d87e76e9 [2019-10-13 23:02:20,725 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:02:20,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-10-13 23:02:20,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc9fb526/587493053ef54f11b93b3c6fa7cfc41f/FLAG6d87e76e9 [2019-10-13 23:02:20,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc9fb526/587493053ef54f11b93b3c6fa7cfc41f [2019-10-13 23:02:20,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:02:20,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:02:20,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:02:20,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:02:20,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:02:20,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:20" (1/1) ... [2019-10-13 23:02:20,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3134989e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:20, skipping insertion in model container [2019-10-13 23:02:20,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:20" (1/1) ... [2019-10-13 23:02:20,924 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:02:21,006 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:02:21,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:02:21,785 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:02:21,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:02:22,017 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:02:22,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22 WrapperNode [2019-10-13 23:02:22,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:02:22,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:02:22,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:02:22,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:02:22,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (1/1) ... [2019-10-13 23:02:22,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:02:22,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:02:22,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:02:22,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:02:22,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (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 23:02:22,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:02:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:02:22,341 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:02:22,341 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:02:22,341 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:02:22,341 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:02:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:02:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:02:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:02:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:02:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:02:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:02:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:02:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:02:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:02:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:02:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:02:22,344 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:02:22,345 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-10-13 23:02:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:02:22,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:02:22,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:02:22,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:02:22,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:02:22,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:02:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:02:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:02:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:02:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:02:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:02:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:02:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:02:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:02:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:02:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:02:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:02:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:02:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:02:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:02:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:02:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:02:22,350 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:02:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:02:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:02:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:02:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:02:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:02:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:02:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:02:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:02:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:02:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:02:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:02:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:02:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:02:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:02:22,353 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:02:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:02:22,354 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:02:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:02:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:02:22,354 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:02:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:02:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:02:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:02:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:02:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:02:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:02:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:02:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:02:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:02:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:02:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:02:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:02:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:02:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:02:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:02:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:02:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:02:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:02:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:02:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:02:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 23:02:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 23:02:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:02:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:02:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:02:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:02:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:02:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:02:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:02:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 23:02:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:02:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:02:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 23:02:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:02:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:02:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:02:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-10-13 23:02:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:02:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:02:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:02:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:02:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:02:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:02:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:02:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:02:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:02:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:02:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:02:22,364 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:02:22,364 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:02:22,364 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:02:22,364 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:02:22,364 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:02:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:02:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:02:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:02:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:02:22,365 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:02:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:02:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:02:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:02:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:02:22,366 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:02:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:02:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:02:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:02:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:02:22,367 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:02:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:02:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:02:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:02:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:02:22,368 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:02:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:02:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:02:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:02:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:02:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:02:22,369 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:02:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:02:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:02:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:02:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:02:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:02:22,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:02:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:02:22,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:02:27,125 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:02:27,127 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:02:27,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:27 BoogieIcfgContainer [2019-10-13 23:02:27,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:02:27,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:02:27,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:02:27,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:02:27,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:02:20" (1/3) ... [2019-10-13 23:02:27,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4994d470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:27, skipping insertion in model container [2019-10-13 23:02:27,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:22" (2/3) ... [2019-10-13 23:02:27,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4994d470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:27, skipping insertion in model container [2019-10-13 23:02:27,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:27" (3/3) ... [2019-10-13 23:02:27,141 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2019-10-13 23:02:27,151 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:02:27,164 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:02:27,176 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:02:27,233 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:02:27,233 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:02:27,233 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:02:27,233 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:02:27,234 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:02:27,234 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:02:27,234 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:02:27,234 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:02:27,276 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states. [2019-10-13 23:02:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 23:02:27,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:27,298 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:27,300 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2030703232, now seen corresponding path program 1 times [2019-10-13 23:02:27,317 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:27,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845709241] [2019-10-13 23:02:27,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:27,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:27,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:02:28,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845709241] [2019-10-13 23:02:28,153 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:28,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:28,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068641243] [2019-10-13 23:02:28,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:28,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:28,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:28,187 INFO L87 Difference]: Start difference. First operand 540 states. Second operand 7 states. [2019-10-13 23:02:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:29,793 INFO L93 Difference]: Finished difference Result 955 states and 1412 transitions. [2019-10-13 23:02:29,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 23:02:29,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2019-10-13 23:02:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:29,821 INFO L225 Difference]: With dead ends: 955 [2019-10-13 23:02:29,821 INFO L226 Difference]: Without dead ends: 537 [2019-10-13 23:02:29,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-10-13 23:02:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 531. [2019-10-13 23:02:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2019-10-13 23:02:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 763 transitions. [2019-10-13 23:02:29,958 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 763 transitions. Word has length 110 [2019-10-13 23:02:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:29,959 INFO L462 AbstractCegarLoop]: Abstraction has 531 states and 763 transitions. [2019-10-13 23:02:29,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 763 transitions. [2019-10-13 23:02:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 23:02:29,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:29,971 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:29,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1123858737, now seen corresponding path program 1 times [2019-10-13 23:02:29,973 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:29,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23178136] [2019-10-13 23:02:29,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:29,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:29,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 23:02:30,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23178136] [2019-10-13 23:02:30,199 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:30,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:02:30,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461093082] [2019-10-13 23:02:30,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:30,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:30,202 INFO L87 Difference]: Start difference. First operand 531 states and 763 transitions. Second operand 5 states. [2019-10-13 23:02:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:30,275 INFO L93 Difference]: Finished difference Result 1037 states and 1505 transitions. [2019-10-13 23:02:30,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:30,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-13 23:02:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:30,284 INFO L225 Difference]: With dead ends: 1037 [2019-10-13 23:02:30,284 INFO L226 Difference]: Without dead ends: 537 [2019-10-13 23:02:30,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-10-13 23:02:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2019-10-13 23:02:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2019-10-13 23:02:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 769 transitions. [2019-10-13 23:02:30,383 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 769 transitions. Word has length 150 [2019-10-13 23:02:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:30,384 INFO L462 AbstractCegarLoop]: Abstraction has 537 states and 769 transitions. [2019-10-13 23:02:30,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 769 transitions. [2019-10-13 23:02:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 23:02:30,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:30,395 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:30,396 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1104860009, now seen corresponding path program 1 times [2019-10-13 23:02:30,404 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:30,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906088070] [2019-10-13 23:02:30,405 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:30,406 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:30,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-13 23:02:30,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906088070] [2019-10-13 23:02:30,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703488362] [2019-10-13 23:02:30,802 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 23:02:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:31,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:31,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 23:02:31,548 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-13 23:02:31,861 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:31,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 23:02:31,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164092832] [2019-10-13 23:02:31,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:31,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:31,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:31,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:02:31,864 INFO L87 Difference]: Start difference. First operand 537 states and 769 transitions. Second operand 4 states. [2019-10-13 23:02:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:32,115 INFO L93 Difference]: Finished difference Result 1082 states and 1589 transitions. [2019-10-13 23:02:32,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:32,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2019-10-13 23:02:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:32,122 INFO L225 Difference]: With dead ends: 1082 [2019-10-13 23:02:32,123 INFO L226 Difference]: Without dead ends: 576 [2019-10-13 23:02:32,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 431 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2019-10-13 23:02:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2019-10-13 23:02:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2019-10-13 23:02:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 842 transitions. [2019-10-13 23:02:32,162 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 842 transitions. Word has length 216 [2019-10-13 23:02:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:32,163 INFO L462 AbstractCegarLoop]: Abstraction has 576 states and 842 transitions. [2019-10-13 23:02:32,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 842 transitions. [2019-10-13 23:02:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 23:02:32,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:32,169 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:32,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:32,379 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash -699123755, now seen corresponding path program 1 times [2019-10-13 23:02:32,380 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:32,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302008605] [2019-10-13 23:02:32,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:32,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:32,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 23:02:32,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302008605] [2019-10-13 23:02:32,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264788510] [2019-10-13 23:02:32,594 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 23:02:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:33,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:33,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 23:02:33,354 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 23:02:33,525 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:33,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 23:02:33,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100675311] [2019-10-13 23:02:33,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:33,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:33,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:33,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:33,528 INFO L87 Difference]: Start difference. First operand 576 states and 842 transitions. Second operand 4 states. [2019-10-13 23:02:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:33,753 INFO L93 Difference]: Finished difference Result 1160 states and 1734 transitions. [2019-10-13 23:02:33,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:33,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2019-10-13 23:02:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:33,759 INFO L225 Difference]: With dead ends: 1160 [2019-10-13 23:02:33,759 INFO L226 Difference]: Without dead ends: 615 [2019-10-13 23:02:33,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-13 23:02:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-10-13 23:02:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-10-13 23:02:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 915 transitions. [2019-10-13 23:02:33,794 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 915 transitions. Word has length 160 [2019-10-13 23:02:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:33,794 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 915 transitions. [2019-10-13 23:02:33,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 915 transitions. [2019-10-13 23:02:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-10-13 23:02:33,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:33,802 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:34,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:34,016 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:34,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash -628378331, now seen corresponding path program 1 times [2019-10-13 23:02:34,017 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:34,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732347855] [2019-10-13 23:02:34,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:34,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:34,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-13 23:02:34,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732347855] [2019-10-13 23:02:34,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679621819] [2019-10-13 23:02:34,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:35,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 3686 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:35,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-10-13 23:02:35,254 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-10-13 23:02:35,642 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:35,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 13 [2019-10-13 23:02:35,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108650988] [2019-10-13 23:02:35,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:35,643 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:35,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:02:35,644 INFO L87 Difference]: Start difference. First operand 615 states and 915 transitions. Second operand 4 states. [2019-10-13 23:02:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:35,838 INFO L93 Difference]: Finished difference Result 1238 states and 1879 transitions. [2019-10-13 23:02:35,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:35,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 286 [2019-10-13 23:02:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:35,845 INFO L225 Difference]: With dead ends: 1238 [2019-10-13 23:02:35,846 INFO L226 Difference]: Without dead ends: 654 [2019-10-13 23:02:35,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 575 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:02:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-13 23:02:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-13 23:02:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-13 23:02:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 988 transitions. [2019-10-13 23:02:35,879 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 988 transitions. Word has length 286 [2019-10-13 23:02:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:35,881 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 988 transitions. [2019-10-13 23:02:35,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 988 transitions. [2019-10-13 23:02:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-10-13 23:02:35,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:35,888 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:36,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:36,096 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1424055278, now seen corresponding path program 1 times [2019-10-13 23:02:36,097 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:36,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524027696] [2019-10-13 23:02:36,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:36,098 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:36,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-10-13 23:02:36,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524027696] [2019-10-13 23:02:36,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70938379] [2019-10-13 23:02:36,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:37,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 3689 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:37,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-10-13 23:02:37,256 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-10-13 23:02:37,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:37,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 13 [2019-10-13 23:02:37,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764074477] [2019-10-13 23:02:37,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:37,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:02:37,586 INFO L87 Difference]: Start difference. First operand 654 states and 988 transitions. Second operand 4 states. [2019-10-13 23:02:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:37,796 INFO L93 Difference]: Finished difference Result 1316 states and 2024 transitions. [2019-10-13 23:02:37,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:37,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 289 [2019-10-13 23:02:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:37,803 INFO L225 Difference]: With dead ends: 1316 [2019-10-13 23:02:37,803 INFO L226 Difference]: Without dead ends: 693 [2019-10-13 23:02:37,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 581 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:02:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-13 23:02:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-13 23:02:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-13 23:02:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1061 transitions. [2019-10-13 23:02:37,845 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1061 transitions. Word has length 289 [2019-10-13 23:02:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:37,850 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1061 transitions. [2019-10-13 23:02:37,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1061 transitions. [2019-10-13 23:02:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 23:02:37,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:37,858 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:38,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:38,069 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:38,070 INFO L82 PathProgramCache]: Analyzing trace with hash 924630329, now seen corresponding path program 1 times [2019-10-13 23:02:38,071 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:38,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86195989] [2019-10-13 23:02:38,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:38,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:38,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-13 23:02:38,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86195989] [2019-10-13 23:02:38,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721067968] [2019-10-13 23:02:38,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:39,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 3309 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:02:39,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 23:02:39,314 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-13 23:02:39,560 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:39,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [12] total 15 [2019-10-13 23:02:39,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624669733] [2019-10-13 23:02:39,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:39,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:39,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:02:39,563 INFO L87 Difference]: Start difference. First operand 693 states and 1061 transitions. Second operand 5 states. [2019-10-13 23:02:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:39,800 INFO L93 Difference]: Finished difference Result 1394 states and 2169 transitions. [2019-10-13 23:02:39,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:39,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-10-13 23:02:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:39,809 INFO L225 Difference]: With dead ends: 1394 [2019-10-13 23:02:39,809 INFO L226 Difference]: Without dead ends: 732 [2019-10-13 23:02:39,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 463 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-10-13 23:02:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2019-10-13 23:02:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2019-10-13 23:02:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2019-10-13 23:02:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1134 transitions. [2019-10-13 23:02:39,856 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1134 transitions. Word has length 230 [2019-10-13 23:02:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:39,857 INFO L462 AbstractCegarLoop]: Abstraction has 732 states and 1134 transitions. [2019-10-13 23:02:39,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1134 transitions. [2019-10-13 23:02:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 23:02:39,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:39,868 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:40,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:40,081 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2069371432, now seen corresponding path program 1 times [2019-10-13 23:02:40,082 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:40,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882905051] [2019-10-13 23:02:40,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:40,083 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:40,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-10-13 23:02:40,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882905051] [2019-10-13 23:02:40,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465624524] [2019-10-13 23:02:40,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:41,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 3306 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 23:02:41,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-13 23:02:41,851 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-13 23:02:42,286 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:42,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [12] total 19 [2019-10-13 23:02:42,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661546070] [2019-10-13 23:02:42,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:42,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:42,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:02:42,296 INFO L87 Difference]: Start difference. First operand 732 states and 1134 transitions. Second operand 9 states. [2019-10-13 23:02:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:45,956 INFO L93 Difference]: Finished difference Result 2065 states and 3261 transitions. [2019-10-13 23:02:45,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 23:02:45,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 230 [2019-10-13 23:02:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:45,966 INFO L225 Difference]: With dead ends: 2065 [2019-10-13 23:02:45,967 INFO L226 Difference]: Without dead ends: 1364 [2019-10-13 23:02:45,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2019-10-13 23:02:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2019-10-13 23:02:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1325. [2019-10-13 23:02:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2019-10-13 23:02:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2100 transitions. [2019-10-13 23:02:46,026 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2100 transitions. Word has length 230 [2019-10-13 23:02:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:46,027 INFO L462 AbstractCegarLoop]: Abstraction has 1325 states and 2100 transitions. [2019-10-13 23:02:46,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2100 transitions. [2019-10-13 23:02:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 23:02:46,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:46,032 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:46,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:46,246 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash 923283601, now seen corresponding path program 1 times [2019-10-13 23:02:46,247 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:46,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314283099] [2019-10-13 23:02:46,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:46,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:46,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 23:02:46,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314283099] [2019-10-13 23:02:46,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:46,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:46,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685551574] [2019-10-13 23:02:46,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:46,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:46,458 INFO L87 Difference]: Start difference. First operand 1325 states and 2100 transitions. Second operand 7 states. [2019-10-13 23:02:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:47,546 INFO L93 Difference]: Finished difference Result 2820 states and 4503 transitions. [2019-10-13 23:02:47,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 23:02:47,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2019-10-13 23:02:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:47,557 INFO L225 Difference]: With dead ends: 2820 [2019-10-13 23:02:47,557 INFO L226 Difference]: Without dead ends: 1279 [2019-10-13 23:02:47,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:02:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-10-13 23:02:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1262. [2019-10-13 23:02:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1262 states. [2019-10-13 23:02:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 1881 transitions. [2019-10-13 23:02:47,654 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 1881 transitions. Word has length 169 [2019-10-13 23:02:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:47,655 INFO L462 AbstractCegarLoop]: Abstraction has 1262 states and 1881 transitions. [2019-10-13 23:02:47,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 1881 transitions. [2019-10-13 23:02:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 23:02:47,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:47,664 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:47,665 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash -587514443, now seen corresponding path program 1 times [2019-10-13 23:02:47,666 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:47,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043807320] [2019-10-13 23:02:47,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:47,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:47,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 23:02:49,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043807320] [2019-10-13 23:02:49,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911835261] [2019-10-13 23:02:49,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:49,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 74 conjunts are in the unsatisfiable core [2019-10-13 23:02:49,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:51,499 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-10-13 23:02:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 23:02:51,878 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:51,995 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 48