java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:07:38,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:07:38,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:07:38,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:07:38,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:07:38,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:07:38,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:07:38,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:07:38,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:07:38,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:07:38,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:07:38,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:07:38,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:07:38,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:07:38,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:07:38,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:07:38,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:07:38,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:07:38,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:07:38,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:07:38,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:07:39,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:07:39,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:07:39,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:07:39,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:07:39,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:07:39,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:07:39,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:07:39,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:07:39,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:07:39,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:07:39,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:07:39,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:07:39,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:07:39,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:07:39,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:07:39,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:07:39,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:07:39,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:07:39,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:07:39,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:07:39,029 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:07:39,055 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:07:39,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:07:39,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:07:39,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:07:39,057 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:07:39,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:07:39,057 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:07:39,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:07:39,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:07:39,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:07:39,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:07:39,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:07:39,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:07:39,059 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:07:39,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:07:39,059 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:07:39,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:07:39,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:07:39,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:07:39,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:07:39,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:07:39,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:39,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:07:39,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:07:39,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:07:39,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:07:39,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:07:39,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:07:39,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:07:39,401 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:07:39,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:07:39,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:07:39,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:07:39,430 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:07:39,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-10-15 01:07:39,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/717fecbab/783bc1f6a70f4c43bd4b11fb2a92c451/FLAG9701cc5fb [2019-10-15 01:07:40,203 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:07:40,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-10-15 01:07:40,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/717fecbab/783bc1f6a70f4c43bd4b11fb2a92c451/FLAG9701cc5fb [2019-10-15 01:07:40,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/717fecbab/783bc1f6a70f4c43bd4b11fb2a92c451 [2019-10-15 01:07:40,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:07:40,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:07:40,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:40,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:07:40,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:07:40,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:40" (1/1) ... [2019-10-15 01:07:40,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b9758f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:40, skipping insertion in model container [2019-10-15 01:07:40,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:07:40" (1/1) ... [2019-10-15 01:07:40,373 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:07:40,462 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:07:41,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:41,214 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:07:41,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:07:41,458 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:07:41,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41 WrapperNode [2019-10-15 01:07:41,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:07:41,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:07:41,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:07:41,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:07:41,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... [2019-10-15 01:07:41,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:07:41,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:07:41,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:07:41,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:07:41,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:07:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:07:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:07:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:07:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:07:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:07:41,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:07:41,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:07:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:07:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:07:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:07:41,763 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:07:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:07:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:07:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:07:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:07:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:07:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:07:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:07:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:07:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:07:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:07:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:07:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:07:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:07:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:07:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:07:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:07:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:07:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:07:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:07:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:07:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:07:41,769 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:07:41,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:07:41,769 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:07:41,769 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:07:41,769 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:07:41,770 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:07:41,770 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:07:41,770 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:07:41,770 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:07:41,771 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:07:41,771 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:07:41,771 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:07:41,771 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:07:41,771 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-15 01:07:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:07:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:07:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:07:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:07:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:07:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:07:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:07:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:07:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:07:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:07:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:07:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:07:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:07:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:07:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:07:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:07:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:07:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:07:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:07:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:07:41,777 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:07:41,777 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:07:41,777 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:07:41,778 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:07:41,778 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:07:41,778 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:07:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:07:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:07:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:07:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:07:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:07:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:07:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:07:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:07:41,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:07:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:07:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:07:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:07:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:07:41,782 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:07:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:07:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:07:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:07:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:07:41,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:07:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:07:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:07:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-15 01:07:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:07:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-15 01:07:41,784 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:07:41,785 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:07:41,785 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:07:41,785 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:07:41,785 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:07:41,785 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:07:41,786 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:07:41,786 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:07:41,786 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:07:41,786 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:07:41,786 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:07:41,786 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:07:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:07:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:07:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:07:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:07:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:07:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:07:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:07:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:07:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:07:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:07:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:07:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:07:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:07:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:07:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:07:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:07:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:07:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:07:41,791 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:07:41,792 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:07:41,792 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:07:41,793 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:07:41,799 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:07:41,799 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:07:41,799 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:07:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:07:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:07:41,800 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:07:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:07:41,806 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:07:41,806 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:07:41,807 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-15 01:07:41,808 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:07:41,809 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:07:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:07:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:07:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:07:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:07:41,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:07:44,131 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:07:44,131 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:07:44,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:44 BoogieIcfgContainer [2019-10-15 01:07:44,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:07:44,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:07:44,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:07:44,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:07:44,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:07:40" (1/3) ... [2019-10-15 01:07:44,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8b0acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:44, skipping insertion in model container [2019-10-15 01:07:44,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:07:41" (2/3) ... [2019-10-15 01:07:44,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a8b0acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:07:44, skipping insertion in model container [2019-10-15 01:07:44,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:07:44" (3/3) ... [2019-10-15 01:07:44,144 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2019-10-15 01:07:44,155 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:07:44,167 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:07:44,179 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:07:44,229 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:07:44,229 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:07:44,230 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:07:44,230 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:07:44,230 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:07:44,230 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:07:44,230 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:07:44,230 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:07:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states. [2019-10-15 01:07:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:07:44,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:44,311 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:44,312 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2055588152, now seen corresponding path program 1 times [2019-10-15 01:07:44,328 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:44,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546221341] [2019-10-15 01:07:44,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:44,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:45,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546221341] [2019-10-15 01:07:45,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024762649] [2019-10-15 01:07:45,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:45,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:07:45,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:45,860 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:46,002 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:46,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-15 01:07:46,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248239717] [2019-10-15 01:07:46,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:07:46,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:07:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:46,028 INFO L87 Difference]: Start difference. First operand 832 states. Second operand 2 states. [2019-10-15 01:07:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:46,166 INFO L93 Difference]: Finished difference Result 1357 states and 2183 transitions. [2019-10-15 01:07:46,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:07:46,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 161 [2019-10-15 01:07:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:46,212 INFO L225 Difference]: With dead ends: 1357 [2019-10-15 01:07:46,212 INFO L226 Difference]: Without dead ends: 686 [2019-10-15 01:07:46,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2019-10-15 01:07:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2019-10-15 01:07:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-10-15 01:07:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1083 transitions. [2019-10-15 01:07:46,351 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1083 transitions. Word has length 161 [2019-10-15 01:07:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:46,354 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1083 transitions. [2019-10-15 01:07:46,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:07:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1083 transitions. [2019-10-15 01:07:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:07:46,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:46,371 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:46,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:46,577 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1248623512, now seen corresponding path program 1 times [2019-10-15 01:07:46,578 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:46,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258836963] [2019-10-15 01:07:46,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:46,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:46,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258836963] [2019-10-15 01:07:46,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406105510] [2019-10-15 01:07:46,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:47,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:47,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:07:47,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:47,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:47,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 01:07:47,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224563307] [2019-10-15 01:07:47,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:47,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:47,804 INFO L87 Difference]: Start difference. First operand 686 states and 1083 transitions. Second operand 4 states. [2019-10-15 01:07:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:47,957 INFO L93 Difference]: Finished difference Result 1355 states and 2156 transitions. [2019-10-15 01:07:47,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:47,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-15 01:07:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:47,967 INFO L225 Difference]: With dead ends: 1355 [2019-10-15 01:07:47,967 INFO L226 Difference]: Without dead ends: 695 [2019-10-15 01:07:47,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-10-15 01:07:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2019-10-15 01:07:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-15 01:07:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1097 transitions. [2019-10-15 01:07:48,047 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1097 transitions. Word has length 161 [2019-10-15 01:07:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:48,049 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1097 transitions. [2019-10-15 01:07:48,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1097 transitions. [2019-10-15 01:07:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:07:48,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:48,059 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:48,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:48,268 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:48,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -916200834, now seen corresponding path program 1 times [2019-10-15 01:07:48,269 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:48,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858439042] [2019-10-15 01:07:48,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:48,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:48,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:48,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858439042] [2019-10-15 01:07:48,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945538295] [2019-10-15 01:07:48,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:49,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:49,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:49,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:07:49,340 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:49,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-15 01:07:49,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977108034] [2019-10-15 01:07:49,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:49,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:07:49,342 INFO L87 Difference]: Start difference. First operand 695 states and 1097 transitions. Second operand 4 states. [2019-10-15 01:07:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:49,623 INFO L93 Difference]: Finished difference Result 1401 states and 2241 transitions. [2019-10-15 01:07:49,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:49,624 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-15 01:07:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:49,632 INFO L225 Difference]: With dead ends: 1401 [2019-10-15 01:07:49,632 INFO L226 Difference]: Without dead ends: 734 [2019-10-15 01:07:49,637 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:07:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-15 01:07:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-10-15 01:07:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-15 01:07:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1171 transitions. [2019-10-15 01:07:49,684 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1171 transitions. Word has length 163 [2019-10-15 01:07:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:49,685 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1171 transitions. [2019-10-15 01:07:49,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1171 transitions. [2019-10-15 01:07:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 01:07:49,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:49,694 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:49,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:49,905 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -444482810, now seen corresponding path program 1 times [2019-10-15 01:07:49,906 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:49,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442590851] [2019-10-15 01:07:49,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,907 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:49,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:50,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442590851] [2019-10-15 01:07:50,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772437180] [2019-10-15 01:07:50,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:50,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 3001 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:50,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:50,821 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:51,097 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:51,097 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:51,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820027243] [2019-10-15 01:07:51,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:51,098 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:51,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:51,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:51,099 INFO L87 Difference]: Start difference. First operand 734 states and 1171 transitions. Second operand 7 states. [2019-10-15 01:07:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:51,331 INFO L93 Difference]: Finished difference Result 1454 states and 2332 transitions. [2019-10-15 01:07:51,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:51,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-15 01:07:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:51,337 INFO L225 Difference]: With dead ends: 1454 [2019-10-15 01:07:51,337 INFO L226 Difference]: Without dead ends: 748 [2019-10-15 01:07:51,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-10-15 01:07:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 741. [2019-10-15 01:07:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-15 01:07:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1182 transitions. [2019-10-15 01:07:51,375 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1182 transitions. Word has length 165 [2019-10-15 01:07:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:51,375 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1182 transitions. [2019-10-15 01:07:51,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1182 transitions. [2019-10-15 01:07:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:07:51,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:51,383 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:51,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:51,596 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:51,596 INFO L82 PathProgramCache]: Analyzing trace with hash 762157303, now seen corresponding path program 1 times [2019-10-15 01:07:51,596 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:51,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224208414] [2019-10-15 01:07:51,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:51,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:51,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:51,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224208414] [2019-10-15 01:07:51,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244914400] [2019-10-15 01:07:51,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:52,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:52,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:52,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:52,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:52,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:07:52,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698853390] [2019-10-15 01:07:52,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:07:52,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:07:52,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:52,508 INFO L87 Difference]: Start difference. First operand 741 states and 1182 transitions. Second operand 4 states. [2019-10-15 01:07:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:52,664 INFO L93 Difference]: Finished difference Result 1467 states and 2352 transitions. [2019-10-15 01:07:52,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:52,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-15 01:07:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:52,670 INFO L225 Difference]: With dead ends: 1467 [2019-10-15 01:07:52,670 INFO L226 Difference]: Without dead ends: 752 [2019-10-15 01:07:52,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-15 01:07:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2019-10-15 01:07:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-15 01:07:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1190 transitions. [2019-10-15 01:07:52,709 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1190 transitions. Word has length 166 [2019-10-15 01:07:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:52,711 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1190 transitions. [2019-10-15 01:07:52,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:07:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1190 transitions. [2019-10-15 01:07:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:07:52,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:52,717 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:52,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:52,926 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash -32158381, now seen corresponding path program 1 times [2019-10-15 01:07:52,927 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:52,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965230420] [2019-10-15 01:07:52,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:52,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:52,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:53,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965230420] [2019-10-15 01:07:53,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093917136] [2019-10-15 01:07:53,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:53,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:53,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:07:53,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-15 01:07:54,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:54,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-15 01:07:54,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712675548] [2019-10-15 01:07:54,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:07:54,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:07:54,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:07:54,175 INFO L87 Difference]: Start difference. First operand 750 states and 1190 transitions. Second operand 7 states. [2019-10-15 01:07:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:54,327 INFO L93 Difference]: Finished difference Result 1471 states and 2346 transitions. [2019-10-15 01:07:54,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:07:54,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-10-15 01:07:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:54,336 INFO L225 Difference]: With dead ends: 1471 [2019-10-15 01:07:54,336 INFO L226 Difference]: Without dead ends: 762 [2019-10-15 01:07:54,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:07:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-10-15 01:07:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 750. [2019-10-15 01:07:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-15 01:07:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1190 transitions. [2019-10-15 01:07:54,378 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1190 transitions. Word has length 166 [2019-10-15 01:07:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:54,379 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1190 transitions. [2019-10-15 01:07:54,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:07:54,379 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1190 transitions. [2019-10-15 01:07:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-15 01:07:54,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:54,386 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:54,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:54,601 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1189046705, now seen corresponding path program 1 times [2019-10-15 01:07:54,602 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:54,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673203246] [2019-10-15 01:07:54,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:54,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:54,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:54,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673203246] [2019-10-15 01:07:54,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801675539] [2019-10-15 01:07:54,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:55,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:55,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:07:55,506 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:55,647 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:55,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:55,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162609998] [2019-10-15 01:07:55,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:55,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:55,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:55,650 INFO L87 Difference]: Start difference. First operand 750 states and 1190 transitions. Second operand 5 states. [2019-10-15 01:07:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:55,742 INFO L93 Difference]: Finished difference Result 1447 states and 2313 transitions. [2019-10-15 01:07:55,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:55,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-10-15 01:07:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:55,750 INFO L225 Difference]: With dead ends: 1447 [2019-10-15 01:07:55,750 INFO L226 Difference]: Without dead ends: 750 [2019-10-15 01:07:55,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 335 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2019-10-15 01:07:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2019-10-15 01:07:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-15 01:07:55,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1185 transitions. [2019-10-15 01:07:55,788 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1185 transitions. Word has length 169 [2019-10-15 01:07:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:55,789 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1185 transitions. [2019-10-15 01:07:55,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1185 transitions. [2019-10-15 01:07:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:07:55,795 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:55,795 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:56,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:56,013 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1058024854, now seen corresponding path program 1 times [2019-10-15 01:07:56,014 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:56,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857195536] [2019-10-15 01:07:56,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:56,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:56,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:56,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857195536] [2019-10-15 01:07:56,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341744913] [2019-10-15 01:07:56,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:56,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:07:56,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:56,816 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:07:56,958 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:56,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-15 01:07:56,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478159681] [2019-10-15 01:07:56,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:07:56,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:07:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:07:56,964 INFO L87 Difference]: Start difference. First operand 750 states and 1185 transitions. Second operand 5 states. [2019-10-15 01:07:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:57,201 INFO L93 Difference]: Finished difference Result 1443 states and 2304 transitions. [2019-10-15 01:07:57,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:07:57,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2019-10-15 01:07:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:57,215 INFO L225 Difference]: With dead ends: 1443 [2019-10-15 01:07:57,215 INFO L226 Difference]: Without dead ends: 792 [2019-10-15 01:07:57,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 337 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:07:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2019-10-15 01:07:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 789. [2019-10-15 01:07:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2019-10-15 01:07:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1258 transitions. [2019-10-15 01:07:57,252 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1258 transitions. Word has length 170 [2019-10-15 01:07:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:57,255 INFO L462 AbstractCegarLoop]: Abstraction has 789 states and 1258 transitions. [2019-10-15 01:07:57,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:07:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1258 transitions. [2019-10-15 01:07:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:07:57,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:57,261 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:57,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:57,473 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2107428973, now seen corresponding path program 1 times [2019-10-15 01:07:57,474 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:57,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032691341] [2019-10-15 01:07:57,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:57,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:57,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:57,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032691341] [2019-10-15 01:07:57,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034789715] [2019-10-15 01:07:57,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:58,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:07:58,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:07:58,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:07:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:07:58,762 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:07:58,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:07:58,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955688356] [2019-10-15 01:07:58,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:07:58,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:07:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:07:58,766 INFO L87 Difference]: Start difference. First operand 789 states and 1258 transitions. Second operand 11 states. [2019-10-15 01:07:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:59,011 INFO L93 Difference]: Finished difference Result 1463 states and 2328 transitions. [2019-10-15 01:07:59,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:07:59,012 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-10-15 01:07:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:59,021 INFO L225 Difference]: With dead ends: 1463 [2019-10-15 01:07:59,022 INFO L226 Difference]: Without dead ends: 812 [2019-10-15 01:07:59,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:07:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-10-15 01:07:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 796. [2019-10-15 01:07:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-10-15 01:07:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1267 transitions. [2019-10-15 01:07:59,074 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1267 transitions. Word has length 171 [2019-10-15 01:07:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:59,074 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1267 transitions. [2019-10-15 01:07:59,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:07:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1267 transitions. [2019-10-15 01:07:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 01:07:59,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:59,085 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:07:59,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:59,300 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:59,300 INFO L82 PathProgramCache]: Analyzing trace with hash 863803383, now seen corresponding path program 1 times [2019-10-15 01:07:59,300 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:59,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822568746] [2019-10-15 01:07:59,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:59,301 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:59,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:07:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:07:59,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822568746] [2019-10-15 01:07:59,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316320801] [2019-10-15 01:07:59,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:00,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:00,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:08:00,071 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:00,226 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:00,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-15 01:08:00,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438097378] [2019-10-15 01:08:00,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:08:00,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:08:00,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:00,228 INFO L87 Difference]: Start difference. First operand 796 states and 1267 transitions. Second operand 6 states. [2019-10-15 01:08:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:00,314 INFO L93 Difference]: Finished difference Result 1505 states and 2403 transitions. [2019-10-15 01:08:00,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:00,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2019-10-15 01:08:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:00,321 INFO L225 Difference]: With dead ends: 1505 [2019-10-15 01:08:00,321 INFO L226 Difference]: Without dead ends: 796 [2019-10-15 01:08:00,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:08:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2019-10-15 01:08:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2019-10-15 01:08:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-10-15 01:08:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1264 transitions. [2019-10-15 01:08:00,351 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1264 transitions. Word has length 173 [2019-10-15 01:08:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:00,352 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1264 transitions. [2019-10-15 01:08:00,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:08:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1264 transitions. [2019-10-15 01:08:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 01:08:00,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:00,358 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:08:00,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:00,566 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:00,567 INFO L82 PathProgramCache]: Analyzing trace with hash 674320387, now seen corresponding path program 1 times [2019-10-15 01:08:00,567 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:00,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615332984] [2019-10-15 01:08:00,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:00,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:00,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:00,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615332984] [2019-10-15 01:08:00,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012065007] [2019-10-15 01:08:00,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:01,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:08:01,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:01,374 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:08:01,635 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:01,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-15 01:08:01,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024341573] [2019-10-15 01:08:01,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:08:01,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:01,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:08:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:01,637 INFO L87 Difference]: Start difference. First operand 796 states and 1264 transitions. Second operand 5 states. [2019-10-15 01:08:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:02,669 INFO L93 Difference]: Finished difference Result 1451 states and 2341 transitions. [2019-10-15 01:08:02,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:08:02,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-10-15 01:08:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:02,678 INFO L225 Difference]: With dead ends: 1451 [2019-10-15 01:08:02,679 INFO L226 Difference]: Without dead ends: 804 [2019-10-15 01:08:02,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:08:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2019-10-15 01:08:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2019-10-15 01:08:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2019-10-15 01:08:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1277 transitions. [2019-10-15 01:08:02,725 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1277 transitions. Word has length 174 [2019-10-15 01:08:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:02,726 INFO L462 AbstractCegarLoop]: Abstraction has 804 states and 1277 transitions. [2019-10-15 01:08:02,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:08:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1277 transitions. [2019-10-15 01:08:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:08:02,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:02,733 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:08:02,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:02,943 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1642697509, now seen corresponding path program 1 times [2019-10-15 01:08:02,944 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:02,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027581073] [2019-10-15 01:08:02,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:02,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:02,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:03,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027581073] [2019-10-15 01:08:03,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696608086] [2019-10-15 01:08:03,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:03,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:08:03,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:03,824 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:08:04,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:04,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-15 01:08:04,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435031192] [2019-10-15 01:08:04,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:08:04,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:08:04,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:04,137 INFO L87 Difference]: Start difference. First operand 804 states and 1277 transitions. Second operand 5 states. [2019-10-15 01:08:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:05,105 INFO L93 Difference]: Finished difference Result 1467 states and 2364 transitions. [2019-10-15 01:08:05,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:08:05,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-10-15 01:08:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:05,112 INFO L225 Difference]: With dead ends: 1467 [2019-10-15 01:08:05,113 INFO L226 Difference]: Without dead ends: 812 [2019-10-15 01:08:05,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:08:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-10-15 01:08:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2019-10-15 01:08:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-10-15 01:08:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1290 transitions. [2019-10-15 01:08:05,155 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1290 transitions. Word has length 176 [2019-10-15 01:08:05,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:05,156 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1290 transitions. [2019-10-15 01:08:05,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:08:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1290 transitions. [2019-10-15 01:08:05,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:08:05,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:05,162 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:08:05,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:05,372 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1977942659, now seen corresponding path program 1 times [2019-10-15 01:08:05,372 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:05,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926255580] [2019-10-15 01:08:05,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:05,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:05,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:08:05,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926255580] [2019-10-15 01:08:05,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817517618] [2019-10-15 01:08:05,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:06,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:08:06,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:06,231 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:08:06,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:06,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-15 01:08:06,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901372611] [2019-10-15 01:08:06,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:08:06,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:06,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:08:06,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:06,510 INFO L87 Difference]: Start difference. First operand 812 states and 1290 transitions. Second operand 5 states. [2019-10-15 01:08:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:07,527 INFO L93 Difference]: Finished difference Result 1483 states and 2387 transitions. [2019-10-15 01:08:07,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:08:07,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-10-15 01:08:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:07,532 INFO L225 Difference]: With dead ends: 1483 [2019-10-15 01:08:07,532 INFO L226 Difference]: Without dead ends: 820 [2019-10-15 01:08:07,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:08:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-10-15 01:08:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2019-10-15 01:08:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2019-10-15 01:08:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1303 transitions. [2019-10-15 01:08:07,573 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1303 transitions. Word has length 178 [2019-10-15 01:08:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:07,573 INFO L462 AbstractCegarLoop]: Abstraction has 820 states and 1303 transitions. [2019-10-15 01:08:07,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:08:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1303 transitions. [2019-10-15 01:08:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 01:08:07,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:07,580 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:08:07,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:07,788 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1043965741, now seen corresponding path program 1 times [2019-10-15 01:08:07,788 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:07,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697701919] [2019-10-15 01:08:07,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:07,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:07,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:08:07,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697701919] [2019-10-15 01:08:07,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012932002] [2019-10-15 01:08:07,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:08,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:08:08,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:08,601 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 01:08:08,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:08,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-15 01:08:08,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195131298] [2019-10-15 01:08:08,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:08:08,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:08:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:08:08,874 INFO L87 Difference]: Start difference. First operand 820 states and 1303 transitions. Second operand 5 states. [2019-10-15 01:08:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:09,826 INFO L93 Difference]: Finished difference Result 1499 states and 2410 transitions. [2019-10-15 01:08:09,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:08:09,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-10-15 01:08:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:09,833 INFO L225 Difference]: With dead ends: 1499 [2019-10-15 01:08:09,833 INFO L226 Difference]: Without dead ends: 828 [2019-10-15 01:08:09,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:08:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-15 01:08:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-15 01:08:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-15 01:08:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1316 transitions. [2019-10-15 01:08:09,868 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1316 transitions. Word has length 180 [2019-10-15 01:08:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:09,869 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1316 transitions. [2019-10-15 01:08:09,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:08:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1316 transitions. [2019-10-15 01:08:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-15 01:08:09,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:09,876 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:08:10,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:10,091 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:10,091 INFO L82 PathProgramCache]: Analyzing trace with hash 567339875, now seen corresponding path program 1 times [2019-10-15 01:08:10,092 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:10,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648303397] [2019-10-15 01:08:10,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:10,092 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:10,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:08:10,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648303397] [2019-10-15 01:08:10,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640297053] [2019-10-15 01:08:10,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:10,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:08:10,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:08:10,901 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:08:11,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:11,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 01:08:11,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181146021] [2019-10-15 01:08:11,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:11,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:08:11,043 INFO L87 Difference]: Start difference. First operand 828 states and 1316 transitions. Second operand 4 states. [2019-10-15 01:08:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:11,107 INFO L93 Difference]: Finished difference Result 1615 states and 2588 transitions. [2019-10-15 01:08:11,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:11,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-10-15 01:08:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:11,113 INFO L225 Difference]: With dead ends: 1615 [2019-10-15 01:08:11,114 INFO L226 Difference]: Without dead ends: 805 [2019-10-15 01:08:11,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:08:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2019-10-15 01:08:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2019-10-15 01:08:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2019-10-15 01:08:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1273 transitions. [2019-10-15 01:08:11,151 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1273 transitions. Word has length 182 [2019-10-15 01:08:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:11,151 INFO L462 AbstractCegarLoop]: Abstraction has 805 states and 1273 transitions. [2019-10-15 01:08:11,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1273 transitions. [2019-10-15 01:08:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 01:08:11,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:11,158 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:11,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:11,366 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1660003128, now seen corresponding path program 1 times [2019-10-15 01:08:11,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:11,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304331624] [2019-10-15 01:08:11,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:11,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:11,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:11,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304331624] [2019-10-15 01:08:11,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994076564] [2019-10-15 01:08:11,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:12,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:12,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 01:08:12,306 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:12,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:12,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-15 01:08:12,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337396258] [2019-10-15 01:08:12,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:12,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:08:12,582 INFO L87 Difference]: Start difference. First operand 805 states and 1273 transitions. Second operand 7 states. [2019-10-15 01:08:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:12,690 INFO L93 Difference]: Finished difference Result 1564 states and 2481 transitions. [2019-10-15 01:08:12,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:12,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2019-10-15 01:08:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:12,696 INFO L225 Difference]: With dead ends: 1564 [2019-10-15 01:08:12,697 INFO L226 Difference]: Without dead ends: 807 [2019-10-15 01:08:12,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2019-10-15 01:08:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2019-10-15 01:08:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2019-10-15 01:08:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2019-10-15 01:08:12,727 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 180 [2019-10-15 01:08:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:12,727 INFO L462 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2019-10-15 01:08:12,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2019-10-15 01:08:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-15 01:08:12,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:12,733 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:12,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:12,941 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2098072582, now seen corresponding path program 1 times [2019-10-15 01:08:12,942 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:12,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143962781] [2019-10-15 01:08:12,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:12,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:12,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:13,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143962781] [2019-10-15 01:08:13,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38779285] [2019-10-15 01:08:13,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:13,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:13,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 01:08:13,853 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:14,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:08:14,211 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:14,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-15 01:08:14,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964131489] [2019-10-15 01:08:14,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:14,212 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:14,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:08:14,212 INFO L87 Difference]: Start difference. First operand 799 states and 1259 transitions. Second operand 9 states.