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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:19,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:19,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:19,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:19,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:19,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:19,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:19,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:19,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:19,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:19,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:19,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:19,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:19,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:19,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:19,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:19,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:19,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:19,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:19,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:19,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:19,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:19,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:19,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:19,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:19,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:19,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:19,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:19,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:19,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:19,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:19,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:19,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:19,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:19,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:19,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:19,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:19,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:19,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:19,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:19,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:19,932 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 21:09:19,964 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:19,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:19,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:19,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:19,969 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:19,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:19,970 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:19,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:19,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:19,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:19,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:19,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:19,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:19,972 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:19,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:19,972 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:19,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:19,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:19,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:19,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:19,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:19,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:19,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:19,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:19,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:19,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:19,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:19,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:19,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:20,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:20,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:20,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:20,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:20,251 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:20,252 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c [2019-10-13 21:09:20,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071dfb269/3187c0afb0fa4f7f9c119b6613e1a145/FLAGbc1bbaef2 [2019-10-13 21:09:20,918 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:20,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c [2019-10-13 21:09:20,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071dfb269/3187c0afb0fa4f7f9c119b6613e1a145/FLAGbc1bbaef2 [2019-10-13 21:09:21,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071dfb269/3187c0afb0fa4f7f9c119b6613e1a145 [2019-10-13 21:09:21,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:21,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:21,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:21,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:21,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:21,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:21" (1/1) ... [2019-10-13 21:09:21,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7384ae86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:21, skipping insertion in model container [2019-10-13 21:09:21,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:21" (1/1) ... [2019-10-13 21:09:21,181 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:21,262 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:21,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:21,944 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:22,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:22,160 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:22,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22 WrapperNode [2019-10-13 21:09:22,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:22,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:22,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:22,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:22,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (1/1) ... [2019-10-13 21:09:22,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:22,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:22,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:22,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:22,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (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 21:09:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:22,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:22,428 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:22,432 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:22,434 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__base [2019-10-13 21:09:22,437 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:22,438 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-10-13 21:09:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:22,442 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:22,443 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:22,443 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:22,443 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:22,443 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:22,444 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:22,445 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:22,445 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:22,445 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:22,445 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:22,446 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:22,446 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:22,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:22,452 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:22,453 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:22,454 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:22,455 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__base [2019-10-13 21:09:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-10-13 21:09:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:22,471 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:22,472 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:22,473 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:22,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:24,614 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:24,615 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:24,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:24 BoogieIcfgContainer [2019-10-13 21:09:24,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:24,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:24,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:24,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:24,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:21" (1/3) ... [2019-10-13 21:09:24,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478d0d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:24, skipping insertion in model container [2019-10-13 21:09:24,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:22" (2/3) ... [2019-10-13 21:09:24,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478d0d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:24, skipping insertion in model container [2019-10-13 21:09:24,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:24" (3/3) ... [2019-10-13 21:09:24,625 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2019-10-13 21:09:24,634 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:24,643 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:24,655 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:24,694 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:24,694 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:24,695 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:24,695 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:24,695 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:24,695 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:24,695 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:24,695 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states. [2019-10-13 21:09:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:24,771 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:24,772 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:24,774 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1215975064, now seen corresponding path program 1 times [2019-10-13 21:09:24,789 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:24,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466424442] [2019-10-13 21:09:24,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:24,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:24,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:25,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466424442] [2019-10-13 21:09:25,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959720626] [2019-10-13 21:09:25,434 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 21:09:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:26,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 3256 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:26,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:26,239 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:26,594 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:26,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:26,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614527887] [2019-10-13 21:09:26,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:26,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:26,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:26,619 INFO L87 Difference]: Start difference. First operand 750 states. Second operand 2 states. [2019-10-13 21:09:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:26,687 INFO L93 Difference]: Finished difference Result 633 states and 1010 transitions. [2019-10-13 21:09:26,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:26,689 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-13 21:09:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:26,719 INFO L225 Difference]: With dead ends: 633 [2019-10-13 21:09:26,719 INFO L226 Difference]: Without dead ends: 596 [2019-10-13 21:09:26,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-10-13 21:09:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2019-10-13 21:09:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2019-10-13 21:09:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 955 transitions. [2019-10-13 21:09:26,862 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 955 transitions. Word has length 164 [2019-10-13 21:09:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:26,865 INFO L462 AbstractCegarLoop]: Abstraction has 596 states and 955 transitions. [2019-10-13 21:09:26,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 955 transitions. [2019-10-13 21:09:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:26,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:26,885 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:27,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:27,095 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512037, now seen corresponding path program 1 times [2019-10-13 21:09:27,096 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:27,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373952671] [2019-10-13 21:09:27,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:27,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:27,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:27,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373952671] [2019-10-13 21:09:27,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399888921] [2019-10-13 21:09:27,358 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 21:09:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:27,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 3259 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:27,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:09:27,995 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:28,268 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:28,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 21:09:28,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246901265] [2019-10-13 21:09:28,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:09:28,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:28,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:09:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:28,304 INFO L87 Difference]: Start difference. First operand 596 states and 955 transitions. Second operand 3 states. [2019-10-13 21:09:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:28,427 INFO L93 Difference]: Finished difference Result 1565 states and 2548 transitions. [2019-10-13 21:09:28,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:09:28,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-10-13 21:09:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:28,438 INFO L225 Difference]: With dead ends: 1565 [2019-10-13 21:09:28,438 INFO L226 Difference]: Without dead ends: 1078 [2019-10-13 21:09:28,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 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 21:09:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2019-10-13 21:09:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1056. [2019-10-13 21:09:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-10-13 21:09:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1715 transitions. [2019-10-13 21:09:28,508 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1715 transitions. Word has length 166 [2019-10-13 21:09:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:28,509 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1715 transitions. [2019-10-13 21:09:28,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:09:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1715 transitions. [2019-10-13 21:09:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:28,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:28,515 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:28,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:28,730 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2049855385, now seen corresponding path program 1 times [2019-10-13 21:09:28,732 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:28,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239507021] [2019-10-13 21:09:28,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:28,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:28,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:28,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239507021] [2019-10-13 21:09:28,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147475504] [2019-10-13 21:09:28,914 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 21:09:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:29,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:29,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:29,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:29,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:29,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:29,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12416830] [2019-10-13 21:09:29,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:29,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:29,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:29,827 INFO L87 Difference]: Start difference. First operand 1056 states and 1715 transitions. Second operand 4 states. [2019-10-13 21:09:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:29,921 INFO L93 Difference]: Finished difference Result 2084 states and 3403 transitions. [2019-10-13 21:09:29,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:29,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:09:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:29,931 INFO L225 Difference]: With dead ends: 2084 [2019-10-13 21:09:29,931 INFO L226 Difference]: Without dead ends: 1056 [2019-10-13 21:09:29,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:29,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-10-13 21:09:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2019-10-13 21:09:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-10-13 21:09:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1714 transitions. [2019-10-13 21:09:29,995 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1714 transitions. Word has length 166 [2019-10-13 21:09:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:29,997 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1714 transitions. [2019-10-13 21:09:29,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1714 transitions. [2019-10-13 21:09:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:09:30,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:30,007 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:30,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:30,221 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1271242485, now seen corresponding path program 1 times [2019-10-13 21:09:30,222 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:30,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067140741] [2019-10-13 21:09:30,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:30,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:30,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:30,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067140741] [2019-10-13 21:09:30,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875203389] [2019-10-13 21:09:30,359 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 21:09:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:30,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 3262 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:30,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:31,030 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:31,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:31,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:31,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969428435] [2019-10-13 21:09:31,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:31,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:31,337 INFO L87 Difference]: Start difference. First operand 1056 states and 1714 transitions. Second operand 4 states. [2019-10-13 21:09:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:31,423 INFO L93 Difference]: Finished difference Result 2084 states and 3401 transitions. [2019-10-13 21:09:31,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:31,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:09:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:31,439 INFO L225 Difference]: With dead ends: 2084 [2019-10-13 21:09:31,439 INFO L226 Difference]: Without dead ends: 1056 [2019-10-13 21:09:31,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-10-13 21:09:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2019-10-13 21:09:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-10-13 21:09:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1713 transitions. [2019-10-13 21:09:31,496 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1713 transitions. Word has length 168 [2019-10-13 21:09:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:31,496 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1713 transitions. [2019-10-13 21:09:31,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1713 transitions. [2019-10-13 21:09:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:09:31,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:31,502 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:31,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:31,716 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -618683487, now seen corresponding path program 1 times [2019-10-13 21:09:31,717 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:31,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381944703] [2019-10-13 21:09:31,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:31,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381944703] [2019-10-13 21:09:31,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292077779] [2019-10-13 21:09:31,839 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 21:09:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:32,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:32,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:32,472 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:32,857 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-13 21:09:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:32,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:32,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:32,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370843694] [2019-10-13 21:09:32,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:32,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:32,946 INFO L87 Difference]: Start difference. First operand 1056 states and 1713 transitions. Second operand 4 states. [2019-10-13 21:09:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:33,061 INFO L93 Difference]: Finished difference Result 2091 states and 3408 transitions. [2019-10-13 21:09:33,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:33,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:09:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:33,077 INFO L225 Difference]: With dead ends: 2091 [2019-10-13 21:09:33,077 INFO L226 Difference]: Without dead ends: 1065 [2019-10-13 21:09:33,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-13 21:09:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-13 21:09:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-13 21:09:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1725 transitions. [2019-10-13 21:09:33,143 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1725 transitions. Word has length 170 [2019-10-13 21:09:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:33,143 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1725 transitions. [2019-10-13 21:09:33,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1725 transitions. [2019-10-13 21:09:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:09:33,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:33,148 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:33,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:33,366 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1482424208, now seen corresponding path program 1 times [2019-10-13 21:09:33,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:33,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039873420] [2019-10-13 21:09:33,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:33,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:33,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:33,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039873420] [2019-10-13 21:09:33,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862820979] [2019-10-13 21:09:33,481 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 21:09:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:34,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:34,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:34,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:34,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:34,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:34,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770523929] [2019-10-13 21:09:34,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:34,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:34,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:34,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:34,448 INFO L87 Difference]: Start difference. First operand 1065 states and 1725 transitions. Second operand 4 states. [2019-10-13 21:09:34,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:34,549 INFO L93 Difference]: Finished difference Result 2093 states and 3409 transitions. [2019-10-13 21:09:34,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:34,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-13 21:09:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:34,561 INFO L225 Difference]: With dead ends: 2093 [2019-10-13 21:09:34,561 INFO L226 Difference]: Without dead ends: 1065 [2019-10-13 21:09:34,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-13 21:09:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-13 21:09:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-13 21:09:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1724 transitions. [2019-10-13 21:09:34,624 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1724 transitions. Word has length 171 [2019-10-13 21:09:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:34,626 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1724 transitions. [2019-10-13 21:09:34,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1724 transitions. [2019-10-13 21:09:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:09:34,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:34,631 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:34,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:34,838 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:34,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1945680261, now seen corresponding path program 1 times [2019-10-13 21:09:34,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:34,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630116342] [2019-10-13 21:09:34,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:34,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:34,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:34,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630116342] [2019-10-13 21:09:34,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426118391] [2019-10-13 21:09:34,956 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 21:09:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:35,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:35,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:35,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:36,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:36,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:36,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503962218] [2019-10-13 21:09:36,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:36,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:36,026 INFO L87 Difference]: Start difference. First operand 1065 states and 1724 transitions. Second operand 4 states. [2019-10-13 21:09:36,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:36,119 INFO L93 Difference]: Finished difference Result 2093 states and 3408 transitions. [2019-10-13 21:09:36,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:36,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-13 21:09:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:36,128 INFO L225 Difference]: With dead ends: 2093 [2019-10-13 21:09:36,128 INFO L226 Difference]: Without dead ends: 1065 [2019-10-13 21:09:36,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 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 21:09:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-13 21:09:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-13 21:09:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-13 21:09:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1723 transitions. [2019-10-13 21:09:36,186 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1723 transitions. Word has length 172 [2019-10-13 21:09:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:36,187 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1723 transitions. [2019-10-13 21:09:36,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1723 transitions. [2019-10-13 21:09:36,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:09:36,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:36,195 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:36,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:36,406 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash 982032148, now seen corresponding path program 1 times [2019-10-13 21:09:36,407 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:36,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332021284] [2019-10-13 21:09:36,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:36,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:36,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:36,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332021284] [2019-10-13 21:09:36,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583663179] [2019-10-13 21:09:36,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:37,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:37,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:37,303 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:37,618 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:37,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:37,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719785151] [2019-10-13 21:09:37,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:37,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:37,620 INFO L87 Difference]: Start difference. First operand 1065 states and 1723 transitions. Second operand 4 states. [2019-10-13 21:09:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:37,780 INFO L93 Difference]: Finished difference Result 2092 states and 3408 transitions. [2019-10-13 21:09:37,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:37,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-13 21:09:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:37,788 INFO L225 Difference]: With dead ends: 2092 [2019-10-13 21:09:37,788 INFO L226 Difference]: Without dead ends: 1065 [2019-10-13 21:09:37,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-13 21:09:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-13 21:09:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-13 21:09:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1718 transitions. [2019-10-13 21:09:37,839 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1718 transitions. Word has length 173 [2019-10-13 21:09:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:37,841 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1718 transitions. [2019-10-13 21:09:37,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1718 transitions. [2019-10-13 21:09:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:09:37,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:37,847 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:38,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:38,062 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:38,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1458586870, now seen corresponding path program 1 times [2019-10-13 21:09:38,062 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:38,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725710466] [2019-10-13 21:09:38,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:38,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:38,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:38,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725710466] [2019-10-13 21:09:38,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336111298] [2019-10-13 21:09:38,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:39,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:39,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:39,138 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:39,390 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:39,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:39,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966212207] [2019-10-13 21:09:39,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:39,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:39,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:39,394 INFO L87 Difference]: Start difference. First operand 1065 states and 1718 transitions. Second operand 4 states. [2019-10-13 21:09:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:39,584 INFO L93 Difference]: Finished difference Result 2092 states and 3398 transitions. [2019-10-13 21:09:39,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:39,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-13 21:09:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:39,595 INFO L225 Difference]: With dead ends: 2092 [2019-10-13 21:09:39,595 INFO L226 Difference]: Without dead ends: 1065 [2019-10-13 21:09:39,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-13 21:09:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-13 21:09:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-13 21:09:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1713 transitions. [2019-10-13 21:09:39,652 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1713 transitions. Word has length 175 [2019-10-13 21:09:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:39,652 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1713 transitions. [2019-10-13 21:09:39,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1713 transitions. [2019-10-13 21:09:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:09:39,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:39,658 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-13 21:09:39,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:39,870 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1544496906, now seen corresponding path program 1 times [2019-10-13 21:09:39,871 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:39,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65784354] [2019-10-13 21:09:39,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:39,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:39,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:40,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65784354] [2019-10-13 21:09:40,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745051475] [2019-10-13 21:09:40,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:40,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:40,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:40,900 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:41,217 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:41,218 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:41,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924273545] [2019-10-13 21:09:41,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:41,220 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:41,221 INFO L87 Difference]: Start difference. First operand 1065 states and 1713 transitions. Second operand 4 states. [2019-10-13 21:09:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:41,443 INFO L93 Difference]: Finished difference Result 2128 states and 3447 transitions. [2019-10-13 21:09:41,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:41,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-13 21:09:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:41,451 INFO L225 Difference]: With dead ends: 2128 [2019-10-13 21:09:41,452 INFO L226 Difference]: Without dead ends: 1104 [2019-10-13 21:09:41,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-10-13 21:09:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-10-13 21:09:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-10-13 21:09:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1777 transitions. [2019-10-13 21:09:41,498 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1777 transitions. Word has length 177 [2019-10-13 21:09:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:41,499 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1777 transitions. [2019-10-13 21:09:41,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1777 transitions. [2019-10-13 21:09:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:41,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:41,504 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:41,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:41,714 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash 488245515, now seen corresponding path program 1 times [2019-10-13 21:09:41,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:41,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133728976] [2019-10-13 21:09:41,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:41,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:41,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:41,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133728976] [2019-10-13 21:09:41,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317635899] [2019-10-13 21:09:41,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:42,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:42,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:42,702 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:42,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:42,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:09:42,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287314348] [2019-10-13 21:09:42,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:42,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:42,984 INFO L87 Difference]: Start difference. First operand 1104 states and 1777 transitions. Second operand 4 states. [2019-10-13 21:09:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:43,174 INFO L93 Difference]: Finished difference Result 2131 states and 3450 transitions. [2019-10-13 21:09:43,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:43,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-13 21:09:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:43,187 INFO L225 Difference]: With dead ends: 2131 [2019-10-13 21:09:43,187 INFO L226 Difference]: Without dead ends: 1104 [2019-10-13 21:09:43,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-10-13 21:09:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-10-13 21:09:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-10-13 21:09:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1772 transitions. [2019-10-13 21:09:43,227 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1772 transitions. Word has length 178 [2019-10-13 21:09:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:43,228 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1772 transitions. [2019-10-13 21:09:43,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1772 transitions. [2019-10-13 21:09:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:43,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:43,233 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:43,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:43,442 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:43,442 INFO L82 PathProgramCache]: Analyzing trace with hash -293802614, now seen corresponding path program 1 times [2019-10-13 21:09:43,442 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:43,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805365368] [2019-10-13 21:09:43,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:43,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:43,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:43,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805365368] [2019-10-13 21:09:43,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262493940] [2019-10-13 21:09:43,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:44,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:44,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:44,424 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:44,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:09:45,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:45,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:09:45,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054242452] [2019-10-13 21:09:45,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:45,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:45,019 INFO L87 Difference]: Start difference. First operand 1104 states and 1772 transitions. Second operand 9 states. [2019-10-13 21:09:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:45,243 INFO L93 Difference]: Finished difference Result 2144 states and 3464 transitions. [2019-10-13 21:09:45,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:45,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 21:09:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:45,251 INFO L225 Difference]: With dead ends: 2144 [2019-10-13 21:09:45,252 INFO L226 Difference]: Without dead ends: 1120 [2019-10-13 21:09:45,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-13 21:09:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1113. [2019-10-13 21:09:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2019-10-13 21:09:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1785 transitions. [2019-10-13 21:09:45,291 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1785 transitions. Word has length 178 [2019-10-13 21:09:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:45,292 INFO L462 AbstractCegarLoop]: Abstraction has 1113 states and 1785 transitions. [2019-10-13 21:09:45,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1785 transitions. [2019-10-13 21:09:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:09:45,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:45,296 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:45,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:45,505 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash 892032838, now seen corresponding path program 1 times [2019-10-13 21:09:45,505 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:45,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594090947] [2019-10-13 21:09:45,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:45,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:45,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:45,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594090947] [2019-10-13 21:09:45,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925067506] [2019-10-13 21:09:45,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:46,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:46,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:09:46,394 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:46,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:46,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:46,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012854560] [2019-10-13 21:09:46,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:46,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:46,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:46,690 INFO L87 Difference]: Start difference. First operand 1113 states and 1785 transitions. Second operand 4 states. [2019-10-13 21:09:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:46,857 INFO L93 Difference]: Finished difference Result 2145 states and 3467 transitions. [2019-10-13 21:09:46,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:46,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-13 21:09:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:46,866 INFO L225 Difference]: With dead ends: 2145 [2019-10-13 21:09:46,866 INFO L226 Difference]: Without dead ends: 1113 [2019-10-13 21:09:46,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-10-13 21:09:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2019-10-13 21:09:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2019-10-13 21:09:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1780 transitions. [2019-10-13 21:09:46,970 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1780 transitions. Word has length 179 [2019-10-13 21:09:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:46,971 INFO L462 AbstractCegarLoop]: Abstraction has 1113 states and 1780 transitions. [2019-10-13 21:09:46,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1780 transitions. [2019-10-13 21:09:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:46,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:46,976 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:47,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:47,184 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1583466281, now seen corresponding path program 1 times [2019-10-13 21:09:47,185 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:47,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571151199] [2019-10-13 21:09:47,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:47,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:47,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:47,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571151199] [2019-10-13 21:09:47,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341925798] [2019-10-13 21:09:47,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:48,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:48,101 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:48,502 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:48,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:09:48,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924255725] [2019-10-13 21:09:48,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:48,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:48,504 INFO L87 Difference]: Start difference. First operand 1113 states and 1780 transitions. Second operand 11 states. [2019-10-13 21:09:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:48,650 INFO L93 Difference]: Finished difference Result 2082 states and 3361 transitions. [2019-10-13 21:09:48,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:09:48,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-10-13 21:09:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:48,662 INFO L225 Difference]: With dead ends: 2082 [2019-10-13 21:09:48,663 INFO L226 Difference]: Without dead ends: 1130 [2019-10-13 21:09:48,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2019-10-13 21:09:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1120. [2019-10-13 21:09:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2019-10-13 21:09:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1790 transitions. [2019-10-13 21:09:48,706 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1790 transitions. Word has length 178 [2019-10-13 21:09:48,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:48,706 INFO L462 AbstractCegarLoop]: Abstraction has 1120 states and 1790 transitions. [2019-10-13 21:09:48,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1790 transitions. [2019-10-13 21:09:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:09:48,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:48,712 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:48,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,921 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1256046255, now seen corresponding path program 1 times [2019-10-13 21:09:48,921 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:48,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88951648] [2019-10-13 21:09:48,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:49,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88951648] [2019-10-13 21:09:49,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478081080] [2019-10-13 21:09:49,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:49,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:49,969 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:50,331 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:50,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:09:50,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478204931] [2019-10-13 21:09:50,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:09:50,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:50,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:09:50,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:50,333 INFO L87 Difference]: Start difference. First operand 1120 states and 1790 transitions. Second operand 8 states. [2019-10-13 21:09:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:50,444 INFO L93 Difference]: Finished difference Result 2086 states and 3370 transitions. [2019-10-13 21:09:50,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:50,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 181 [2019-10-13 21:09:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:50,452 INFO L225 Difference]: With dead ends: 2086 [2019-10-13 21:09:50,452 INFO L226 Difference]: Without dead ends: 1134 [2019-10-13 21:09:50,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2019-10-13 21:09:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1127. [2019-10-13 21:09:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2019-10-13 21:09:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1801 transitions. [2019-10-13 21:09:50,495 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1801 transitions. Word has length 181 [2019-10-13 21:09:50,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:50,495 INFO L462 AbstractCegarLoop]: Abstraction has 1127 states and 1801 transitions. [2019-10-13 21:09:50,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:09:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1801 transitions. [2019-10-13 21:09:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:09:50,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:50,501 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:50,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,710 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1009108085, now seen corresponding path program 1 times [2019-10-13 21:09:50,711 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:50,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084935782] [2019-10-13 21:09:50,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:50,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:50,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084935782] [2019-10-13 21:09:50,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795559819] [2019-10-13 21:09:50,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:09:51,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:52,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:09:52,361 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:52,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:09:52,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456003375] [2019-10-13 21:09:52,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:09:52,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:09:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:52,364 INFO L87 Difference]: Start difference. First operand 1127 states and 1801 transitions. Second operand 14 states. [2019-10-13 21:09:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:52,670 INFO L93 Difference]: Finished difference Result 2087 states and 3370 transitions. [2019-10-13 21:09:52,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:09:52,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 179 [2019-10-13 21:09:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:52,680 INFO L225 Difference]: With dead ends: 2087 [2019-10-13 21:09:52,680 INFO L226 Difference]: Without dead ends: 1135 [2019-10-13 21:09:52,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2019-10-13 21:09:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1127. [2019-10-13 21:09:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1127 states. [2019-10-13 21:09:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1801 transitions. [2019-10-13 21:09:52,717 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1801 transitions. Word has length 179 [2019-10-13 21:09:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:52,718 INFO L462 AbstractCegarLoop]: Abstraction has 1127 states and 1801 transitions. [2019-10-13 21:09:52,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:09:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1801 transitions. [2019-10-13 21:09:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:09:52,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:52,724 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:52,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,932 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1147295340, now seen corresponding path program 1 times [2019-10-13 21:09:52,933 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126693499] [2019-10-13 21:09:52,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:53,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126693499] [2019-10-13 21:09:53,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109704814] [2019-10-13 21:09:53,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:09:53,886 INFO L321 TraceCheckSpWp]: Computing backward predicates...