/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:07:02,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:07:02,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:07:02,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:07:02,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:07:02,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:07:02,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:07:02,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:07:02,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:07:02,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:07:02,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:07:02,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:07:02,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:07:02,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:07:02,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:07:02,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:07:02,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:07:02,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:07:02,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:07:02,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:07:02,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:07:02,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:07:02,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:07:02,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:07:02,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:07:02,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:07:02,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:07:02,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:07:02,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:07:02,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:07:02,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:07:02,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:07:02,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:07:02,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:07:02,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:07:02,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:07:02,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:07:02,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:07:02,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:07:02,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:07:02,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:07:02,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:07:02,184 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:07:02,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:07:02,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:07:02,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:07:02,186 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:07:02,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:07:02,187 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:07:02,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:07:02,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:07:02,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:07:02,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:07:02,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:07:02,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:07:02,188 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:07:02,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:07:02,188 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:07:02,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:07:02,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:07:02,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:07:02,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:07:02,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:07:02,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:07:02,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:07:02,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:07:02,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:07:02,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:07:02,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:07:02,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:07:02,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:07:02,474 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:07:02,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:07:02,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:07:02,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:07:02,496 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:07:02,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-11-07 04:07:02,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11675451d/b8b93f6664cc493d92aabe3b869f37f6/FLAG0817902fe [2019-11-07 04:07:03,203 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:07:03,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-11-07 04:07:03,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11675451d/b8b93f6664cc493d92aabe3b869f37f6/FLAG0817902fe [2019-11-07 04:07:03,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11675451d/b8b93f6664cc493d92aabe3b869f37f6 [2019-11-07 04:07:03,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:07:03,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:07:03,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:03,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:07:03,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:07:03,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:03" (1/1) ... [2019-11-07 04:07:03,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce461f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:03, skipping insertion in model container [2019-11-07 04:07:03,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:03" (1/1) ... [2019-11-07 04:07:03,486 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:07:03,632 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:07:04,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:04,403 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:07:04,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:04,642 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:07:04,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04 WrapperNode [2019-11-07 04:07:04,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:04,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:07:04,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:07:04,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:07:04,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... [2019-11-07 04:07:04,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:07:04,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:07:04,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:07:04,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:07:04,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:07:04,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:07:04,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:07:04,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:04,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:07:04,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:04,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:04,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:07:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:07:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:07:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-11-07 04:07:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-11-07 04:07:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:07:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:07:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:07:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:07:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:07:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:07:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:07:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:07:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:07:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:07:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:07:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:07:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:07:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:07:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:07:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:07:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:07:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:07:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:07:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:07:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:07:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:07:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:07:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:07:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:07:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:07:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:07:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:07:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:07:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:07:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:07:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:07:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:07:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:07:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:07:04,970 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:07:04,970 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:07:04,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:07:04,970 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:07:04,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:07:04,970 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 04:07:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 04:07:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:07:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:07:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:07:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 04:07:04,971 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 04:07:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:07:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:07:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:07:04,972 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:07:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:07:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 04:07:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 04:07:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:07:04,973 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:07:04,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:07:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:07:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:07:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:07:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:07:04,974 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:07:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:07:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:07:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:07:04,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:07:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:07:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:07:04,976 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:07:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:07:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:07:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:07:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:07:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-11-07 04:07:04,977 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:07:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-11-07 04:07:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:07:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:07:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:07:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:07:04,978 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:07:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:07:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:07:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:07:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:07:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:07:04,979 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:07:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:07:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:07:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:07:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:07:04,980 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:07:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:07:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:07:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:07:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:07:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:07:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:07:04,983 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:07:04,984 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 04:07:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:07:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:07:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:07:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:07:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:07:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:07:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:07:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:07:09,771 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:07:09,771 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:07:09,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:09 BoogieIcfgContainer [2019-11-07 04:07:09,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:07:09,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:07:09,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:07:09,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:07:09,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:07:03" (1/3) ... [2019-11-07 04:07:09,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487160b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:09, skipping insertion in model container [2019-11-07 04:07:09,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:04" (2/3) ... [2019-11-07 04:07:09,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487160b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:09, skipping insertion in model container [2019-11-07 04:07:09,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:09" (3/3) ... [2019-11-07 04:07:09,781 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2019-11-07 04:07:09,792 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:07:09,802 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:07:09,814 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:07:09,847 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:07:09,848 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:07:09,848 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:07:09,848 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:07:09,848 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:07:09,848 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:07:09,848 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:07:09,849 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:07:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states. [2019-11-07 04:07:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 04:07:09,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:09,969 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:09,971 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash -118967536, now seen corresponding path program 1 times [2019-11-07 04:07:09,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:09,987 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964531411] [2019-11-07 04:07:09,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:10,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964531411] [2019-11-07 04:07:10,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407354878] [2019-11-07 04:07:10,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:11,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 04:07:11,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:11,560 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:11,711 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:11,712 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-11-07 04:07:11,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792575551] [2019-11-07 04:07:11,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 04:07:11,720 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:11,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 04:07:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:07:11,736 INFO L87 Difference]: Start difference. First operand 621 states. Second operand 2 states. [2019-11-07 04:07:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:11,876 INFO L93 Difference]: Finished difference Result 992 states and 1498 transitions. [2019-11-07 04:07:11,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 04:07:11,878 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 133 [2019-11-07 04:07:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:11,921 INFO L225 Difference]: With dead ends: 992 [2019-11-07 04:07:11,922 INFO L226 Difference]: Without dead ends: 504 [2019-11-07 04:07:11,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:07:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2019-11-07 04:07:12,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2019-11-07 04:07:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2019-11-07 04:07:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 745 transitions. [2019-11-07 04:07:12,045 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 745 transitions. Word has length 133 [2019-11-07 04:07:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:12,047 INFO L462 AbstractCegarLoop]: Abstraction has 504 states and 745 transitions. [2019-11-07 04:07:12,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 04:07:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 745 transitions. [2019-11-07 04:07:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-07 04:07:12,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:12,067 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:12,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:12,275 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1296682160, now seen corresponding path program 1 times [2019-11-07 04:07:12,276 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:12,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840330156] [2019-11-07 04:07:12,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:07:12,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840330156] [2019-11-07 04:07:12,696 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:12,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:07:12,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522549302] [2019-11-07 04:07:12,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:12,706 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:12,707 INFO L87 Difference]: Start difference. First operand 504 states and 745 transitions. Second operand 5 states. [2019-11-07 04:07:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:13,596 INFO L93 Difference]: Finished difference Result 1438 states and 2166 transitions. [2019-11-07 04:07:13,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:13,597 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-11-07 04:07:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:13,606 INFO L225 Difference]: With dead ends: 1438 [2019-11-07 04:07:13,607 INFO L226 Difference]: Without dead ends: 971 [2019-11-07 04:07:13,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2019-11-07 04:07:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 963. [2019-11-07 04:07:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-11-07 04:07:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1446 transitions. [2019-11-07 04:07:13,724 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1446 transitions. Word has length 133 [2019-11-07 04:07:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:13,724 INFO L462 AbstractCegarLoop]: Abstraction has 963 states and 1446 transitions. [2019-11-07 04:07:13,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1446 transitions. [2019-11-07 04:07:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 04:07:13,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:13,731 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:13,731 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash 237582798, now seen corresponding path program 1 times [2019-11-07 04:07:13,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:13,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826679352] [2019-11-07 04:07:13,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:13,968 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826679352] [2019-11-07 04:07:13,968 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994884072] [2019-11-07 04:07:13,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:14,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:07:14,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:14,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:14,923 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:14,923 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-11-07 04:07:14,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134248902] [2019-11-07 04:07:14,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:14,924 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:14,925 INFO L87 Difference]: Start difference. First operand 963 states and 1446 transitions. Second operand 4 states. [2019-11-07 04:07:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:15,020 INFO L93 Difference]: Finished difference Result 1901 states and 2887 transitions. [2019-11-07 04:07:15,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:15,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 04:07:15,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:15,029 INFO L225 Difference]: With dead ends: 1901 [2019-11-07 04:07:15,029 INFO L226 Difference]: Without dead ends: 975 [2019-11-07 04:07:15,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:15,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2019-11-07 04:07:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 975. [2019-11-07 04:07:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-11-07 04:07:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1458 transitions. [2019-11-07 04:07:15,090 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1458 transitions. Word has length 137 [2019-11-07 04:07:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:15,091 INFO L462 AbstractCegarLoop]: Abstraction has 975 states and 1458 transitions. [2019-11-07 04:07:15,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1458 transitions. [2019-11-07 04:07:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 04:07:15,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:15,096 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:15,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:15,303 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1649777829, now seen corresponding path program 1 times [2019-11-07 04:07:15,304 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:15,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008730026] [2019-11-07 04:07:15,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:15,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008730026] [2019-11-07 04:07:15,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150464403] [2019-11-07 04:07:15,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:16,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:07:16,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 04:07:16,211 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:16,349 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:16,350 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-11-07 04:07:16,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469803622] [2019-11-07 04:07:16,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:16,351 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:16,352 INFO L87 Difference]: Start difference. First operand 975 states and 1458 transitions. Second operand 5 states. [2019-11-07 04:07:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:16,447 INFO L93 Difference]: Finished difference Result 1919 states and 2897 transitions. [2019-11-07 04:07:16,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:16,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-11-07 04:07:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:16,457 INFO L225 Difference]: With dead ends: 1919 [2019-11-07 04:07:16,457 INFO L226 Difference]: Without dead ends: 973 [2019-11-07 04:07:16,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:07:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2019-11-07 04:07:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2019-11-07 04:07:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2019-11-07 04:07:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1450 transitions. [2019-11-07 04:07:16,525 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1450 transitions. Word has length 139 [2019-11-07 04:07:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:16,527 INFO L462 AbstractCegarLoop]: Abstraction has 973 states and 1450 transitions. [2019-11-07 04:07:16,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1450 transitions. [2019-11-07 04:07:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 04:07:16,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:16,536 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:16,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:16,745 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash -787169402, now seen corresponding path program 1 times [2019-11-07 04:07:16,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:16,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998104842] [2019-11-07 04:07:16,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:16,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998104842] [2019-11-07 04:07:16,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567584482] [2019-11-07 04:07:16,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:17,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:17,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:17,783 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:18,007 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:18,007 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-11-07 04:07:18,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183701058] [2019-11-07 04:07:18,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:18,009 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:07:18,013 INFO L87 Difference]: Start difference. First operand 973 states and 1450 transitions. Second operand 5 states. [2019-11-07 04:07:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:19,348 INFO L93 Difference]: Finished difference Result 2353 states and 3570 transitions. [2019-11-07 04:07:19,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:19,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2019-11-07 04:07:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:19,360 INFO L225 Difference]: With dead ends: 2353 [2019-11-07 04:07:19,360 INFO L226 Difference]: Without dead ends: 1417 [2019-11-07 04:07:19,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:07:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2019-11-07 04:07:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1397. [2019-11-07 04:07:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1397 states. [2019-11-07 04:07:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 2056 transitions. [2019-11-07 04:07:19,447 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 2056 transitions. Word has length 140 [2019-11-07 04:07:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:19,448 INFO L462 AbstractCegarLoop]: Abstraction has 1397 states and 2056 transitions. [2019-11-07 04:07:19,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 2056 transitions. [2019-11-07 04:07:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 04:07:19,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:19,452 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:19,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:19,661 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1947274654, now seen corresponding path program 1 times [2019-11-07 04:07:19,662 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:19,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668585577] [2019-11-07 04:07:19,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:19,888 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668585577] [2019-11-07 04:07:19,888 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353933681] [2019-11-07 04:07:19,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:20,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 04:07:20,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 04:07:20,609 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:21,014 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:21,015 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2019-11-07 04:07:21,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791357143] [2019-11-07 04:07:21,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:07:21,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:07:21,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:07:21,019 INFO L87 Difference]: Start difference. First operand 1397 states and 2056 transitions. Second operand 7 states. [2019-11-07 04:07:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:22,886 INFO L93 Difference]: Finished difference Result 3022 states and 4460 transitions. [2019-11-07 04:07:22,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 04:07:22,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-11-07 04:07:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:22,906 INFO L225 Difference]: With dead ends: 3022 [2019-11-07 04:07:22,906 INFO L226 Difference]: Without dead ends: 1662 [2019-11-07 04:07:22,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-11-07 04:07:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-11-07 04:07:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1643. [2019-11-07 04:07:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1643 states. [2019-11-07 04:07:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2402 transitions. [2019-11-07 04:07:23,039 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2402 transitions. Word has length 141 [2019-11-07 04:07:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:23,039 INFO L462 AbstractCegarLoop]: Abstraction has 1643 states and 2402 transitions. [2019-11-07 04:07:23,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:07:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2402 transitions. [2019-11-07 04:07:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 04:07:23,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:23,046 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:23,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:23,264 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1280114856, now seen corresponding path program 1 times [2019-11-07 04:07:23,265 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:23,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476294269] [2019-11-07 04:07:23,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:23,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476294269] [2019-11-07 04:07:23,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476646395] [2019-11-07 04:07:23,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:24,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:07:24,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:07:24,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:24,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:24,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-11-07 04:07:24,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67388912] [2019-11-07 04:07:24,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:24,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:24,268 INFO L87 Difference]: Start difference. First operand 1643 states and 2402 transitions. Second operand 5 states. [2019-11-07 04:07:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:24,349 INFO L93 Difference]: Finished difference Result 3268 states and 4835 transitions. [2019-11-07 04:07:24,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:24,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-11-07 04:07:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:24,364 INFO L225 Difference]: With dead ends: 3268 [2019-11-07 04:07:24,365 INFO L226 Difference]: Without dead ends: 1675 [2019-11-07 04:07:24,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 277 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2019-11-07 04:07:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1655. [2019-11-07 04:07:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1655 states. [2019-11-07 04:07:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2414 transitions. [2019-11-07 04:07:24,461 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2414 transitions. Word has length 141 [2019-11-07 04:07:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:24,462 INFO L462 AbstractCegarLoop]: Abstraction has 1655 states and 2414 transitions. [2019-11-07 04:07:24,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2414 transitions. [2019-11-07 04:07:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 04:07:24,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:24,467 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:24,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:24,674 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash 293521892, now seen corresponding path program 1 times [2019-11-07 04:07:24,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:24,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829454039] [2019-11-07 04:07:24,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:25,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829454039] [2019-11-07 04:07:25,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119060000] [2019-11-07 04:07:25,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:26,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:26,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:07:26,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:26,300 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:26,301 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 04:07:26,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477535509] [2019-11-07 04:07:26,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:26,303 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:26,303 INFO L87 Difference]: Start difference. First operand 1655 states and 2414 transitions. Second operand 4 states. [2019-11-07 04:07:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:26,697 INFO L93 Difference]: Finished difference Result 3334 states and 4951 transitions. [2019-11-07 04:07:26,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:07:26,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-11-07 04:07:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:26,711 INFO L225 Difference]: With dead ends: 3334 [2019-11-07 04:07:26,711 INFO L226 Difference]: Without dead ends: 1730 [2019-11-07 04:07:26,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2019-11-07 04:07:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1712. [2019-11-07 04:07:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2019-11-07 04:07:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2507 transitions. [2019-11-07 04:07:26,806 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2507 transitions. Word has length 143 [2019-11-07 04:07:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:26,806 INFO L462 AbstractCegarLoop]: Abstraction has 1712 states and 2507 transitions. [2019-11-07 04:07:26,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2507 transitions. [2019-11-07 04:07:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 04:07:26,811 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:26,811 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:27,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:27,020 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2100094758, now seen corresponding path program 1 times [2019-11-07 04:07:27,021 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:27,021 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384289434] [2019-11-07 04:07:27,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:27,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384289434] [2019-11-07 04:07:27,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297205608] [2019-11-07 04:07:27,210 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 [2019-11-07 04:07:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:28,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:28,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 04:07:28,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:28,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:28,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-11-07 04:07:28,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661781822] [2019-11-07 04:07:28,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:28,939 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:07:28,940 INFO L87 Difference]: Start difference. First operand 1712 states and 2507 transitions. Second operand 5 states. [2019-11-07 04:07:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:30,219 INFO L93 Difference]: Finished difference Result 4000 states and 6073 transitions. [2019-11-07 04:07:30,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:07:30,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-11-07 04:07:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:30,240 INFO L225 Difference]: With dead ends: 4000 [2019-11-07 04:07:30,240 INFO L226 Difference]: Without dead ends: 2805 [2019-11-07 04:07:30,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 287 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:07:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2019-11-07 04:07:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2740. [2019-11-07 04:07:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2740 states. [2019-11-07 04:07:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4111 transitions. [2019-11-07 04:07:30,378 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4111 transitions. Word has length 145 [2019-11-07 04:07:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:30,379 INFO L462 AbstractCegarLoop]: Abstraction has 2740 states and 4111 transitions. [2019-11-07 04:07:30,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4111 transitions. [2019-11-07 04:07:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 04:07:30,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:30,385 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:30,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:30,592 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash -70432572, now seen corresponding path program 1 times [2019-11-07 04:07:30,594 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:30,594 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798553858] [2019-11-07 04:07:30,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:30,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798553858] [2019-11-07 04:07:30,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421743444] [2019-11-07 04:07:30,743 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 [2019-11-07 04:07:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:31,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:31,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 04:07:31,440 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:31,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:31,555 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2019-11-07 04:07:31,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415458761] [2019-11-07 04:07:31,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:31,558 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:31,558 INFO L87 Difference]: Start difference. First operand 2740 states and 4111 transitions. Second operand 4 states. [2019-11-07 04:07:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:31,688 INFO L93 Difference]: Finished difference Result 5418 states and 8304 transitions. [2019-11-07 04:07:31,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:07:31,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 04:07:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:31,710 INFO L225 Difference]: With dead ends: 5418 [2019-11-07 04:07:31,710 INFO L226 Difference]: Without dead ends: 2729 [2019-11-07 04:07:31,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:07:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2019-11-07 04:07:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2642. [2019-11-07 04:07:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-11-07 04:07:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 3929 transitions. [2019-11-07 04:07:31,880 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 3929 transitions. Word has length 145 [2019-11-07 04:07:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:31,881 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 3929 transitions. [2019-11-07 04:07:31,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 3929 transitions. [2019-11-07 04:07:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 04:07:31,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:31,940 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:32,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:32,146 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:32,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash -389456864, now seen corresponding path program 1 times [2019-11-07 04:07:32,147 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:32,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155498228] [2019-11-07 04:07:32,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 04:07:32,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155498228] [2019-11-07 04:07:32,343 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950566219] [2019-11-07 04:07:32,343 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 [2019-11-07 04:07:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:32,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:32,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 04:07:33,039 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 04:07:33,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:33,178 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 7 [2019-11-07 04:07:33,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531574901] [2019-11-07 04:07:33,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:33,179 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:33,180 INFO L87 Difference]: Start difference. First operand 2642 states and 3929 transitions. Second operand 4 states. [2019-11-07 04:07:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:33,311 INFO L93 Difference]: Finished difference Result 5333 states and 8145 transitions. [2019-11-07 04:07:33,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:07:33,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-11-07 04:07:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:33,330 INFO L225 Difference]: With dead ends: 5333 [2019-11-07 04:07:33,331 INFO L226 Difference]: Without dead ends: 2742 [2019-11-07 04:07:33,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2019-11-07 04:07:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2689. [2019-11-07 04:07:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2689 states. [2019-11-07 04:07:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 4000 transitions. [2019-11-07 04:07:33,468 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 4000 transitions. Word has length 148 [2019-11-07 04:07:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:33,469 INFO L462 AbstractCegarLoop]: Abstraction has 2689 states and 4000 transitions. [2019-11-07 04:07:33,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 4000 transitions. [2019-11-07 04:07:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:07:33,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:33,474 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:33,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:33,690 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1648270878, now seen corresponding path program 1 times [2019-11-07 04:07:33,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:33,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052376740] [2019-11-07 04:07:33,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 04:07:33,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052376740] [2019-11-07 04:07:33,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874839928] [2019-11-07 04:07:33,852 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 [2019-11-07 04:07:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:34,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:07:34,587 INFO L279 TraceCheckSpWp]: Computing forward predicates...