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-f4eb214f-m [2019-10-13 21:08:39,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:39,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:39,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:39,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:39,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:39,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:39,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:39,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:39,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:39,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:39,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:39,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:39,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:39,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:39,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:39,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:39,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:39,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:39,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:39,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:39,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:39,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:39,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:39,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:39,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:39,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:39,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:39,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:39,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:39,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:39,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:39,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:39,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:39,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:39,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:39,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:39,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:39,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:39,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:39,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:39,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:39,693 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:39,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:39,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:39,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:39,697 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:39,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:39,697 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:39,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:39,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:39,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:39,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:39,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:39,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:39,700 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:39,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:39,700 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:39,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:39,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:39,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:39,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:39,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:39,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:39,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:39,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:39,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:39,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:39,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:39,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:39,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:08:40,000 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:40,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:40,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:40,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:40,019 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:40,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-10-13 21:08:40,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3043d4768/1751ce564cdd4b269a033ab89e1c2b0f/FLAG3bce0d027 [2019-10-13 21:08:40,765 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:40,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product31.cil.c [2019-10-13 21:08:40,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3043d4768/1751ce564cdd4b269a033ab89e1c2b0f/FLAG3bce0d027 [2019-10-13 21:08:40,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3043d4768/1751ce564cdd4b269a033ab89e1c2b0f [2019-10-13 21:08:40,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:40,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:40,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:40,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:40,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:40,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678a2432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:40, skipping insertion in model container [2019-10-13 21:08:40,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:40" (1/1) ... [2019-10-13 21:08:40,949 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:41,031 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:41,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:41,813 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:41,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:42,028 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:42,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42 WrapperNode [2019-10-13 21:08:42,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:42,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:42,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:42,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:42,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:42,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:42,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:42,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:42,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:42,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:42,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:42,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:42,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:42,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:42,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:42,350 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:42,351 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:42,351 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:42,352 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:42,354 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:42,354 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:42,354 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:42,355 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:42,358 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:42,359 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:42,359 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:42,360 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:42,360 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:42,360 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:42,360 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:42,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:42,361 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:42,361 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:42,361 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:42,362 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:42,362 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:42,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:42,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:42,362 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:42,363 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:42,363 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:42,363 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:42,363 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:42,363 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:42,364 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:42,364 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:42,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:42,364 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:42,364 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:42,365 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:42,365 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:42,365 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:42,365 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:42,366 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:42,366 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:42,366 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:42,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:42,367 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:42,367 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:42,367 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:42,367 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:42,367 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:42,369 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:42,369 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:08:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:08:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:42,370 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:42,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:42,372 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:42,373 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:42,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:42,375 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:42,376 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:42,377 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:42,378 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:42,379 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:42,380 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:42,381 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:42,382 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:42,383 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:42,383 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:42,383 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:42,384 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:42,385 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:42,385 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:42,385 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:42,386 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:42,387 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:42,388 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:42,388 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:42,392 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:42,393 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:42,394 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:42,400 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:42,400 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:42,401 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:42,401 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:42,401 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:42,401 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:42,402 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:08:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:08:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:42,403 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:42,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:42,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:44,859 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:44,860 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:44,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:44 BoogieIcfgContainer [2019-10-13 21:08:44,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:44,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:44,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:44,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:44,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:40" (1/3) ... [2019-10-13 21:08:44,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766e7fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:44, skipping insertion in model container [2019-10-13 21:08:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42" (2/3) ... [2019-10-13 21:08:44,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766e7fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:44, skipping insertion in model container [2019-10-13 21:08:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:44" (3/3) ... [2019-10-13 21:08:44,871 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product31.cil.c [2019-10-13 21:08:44,883 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:44,893 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:44,907 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:44,941 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:44,942 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:44,942 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:44,942 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:44,942 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:44,942 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:44,942 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:44,942 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states. [2019-10-13 21:08:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:08:45,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:45,013 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] [2019-10-13 21:08:45,016 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2055588152, now seen corresponding path program 1 times [2019-10-13 21:08:45,034 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:45,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98068059] [2019-10-13 21:08:45,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:45,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:45,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98068059] [2019-10-13 21:08:45,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686249912] [2019-10-13 21:08:45,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 3003 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:08:46,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:46,875 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:47,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:47,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-13 21:08:47,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71688759] [2019-10-13 21:08:47,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:08:47,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:47,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:08:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:47,090 INFO L87 Difference]: Start difference. First operand 832 states. Second operand 2 states. [2019-10-13 21:08:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,244 INFO L93 Difference]: Finished difference Result 1357 states and 2183 transitions. [2019-10-13 21:08:47,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:08:47,246 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 161 [2019-10-13 21:08:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,290 INFO L225 Difference]: With dead ends: 1357 [2019-10-13 21:08:47,290 INFO L226 Difference]: Without dead ends: 686 [2019-10-13 21:08:47,307 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 [2019-10-13 21:08:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2019-10-13 21:08:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2019-10-13 21:08:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2019-10-13 21:08:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1083 transitions. [2019-10-13 21:08:47,423 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1083 transitions. Word has length 161 [2019-10-13 21:08:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:47,425 INFO L462 AbstractCegarLoop]: Abstraction has 686 states and 1083 transitions. [2019-10-13 21:08:47,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:08:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1083 transitions. [2019-10-13 21:08:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:08:47,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:47,439 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] [2019-10-13 21:08:47,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,650 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1248623512, now seen corresponding path program 1 times [2019-10-13 21:08:47,651 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:47,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861429195] [2019-10-13 21:08:47,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:47,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861429195] [2019-10-13 21:08:47,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408728230] [2019-10-13 21:08:47,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:48,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:48,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:48,961 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:48,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:48,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230357753] [2019-10-13 21:08:48,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:48,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:48,968 INFO L87 Difference]: Start difference. First operand 686 states and 1083 transitions. Second operand 4 states. [2019-10-13 21:08:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:49,107 INFO L93 Difference]: Finished difference Result 1355 states and 2156 transitions. [2019-10-13 21:08:49,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:49,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-10-13 21:08:49,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:49,116 INFO L225 Difference]: With dead ends: 1355 [2019-10-13 21:08:49,117 INFO L226 Difference]: Without dead ends: 695 [2019-10-13 21:08:49,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-10-13 21:08:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2019-10-13 21:08:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2019-10-13 21:08:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1097 transitions. [2019-10-13 21:08:49,193 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1097 transitions. Word has length 161 [2019-10-13 21:08:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:49,195 INFO L462 AbstractCegarLoop]: Abstraction has 695 states and 1097 transitions. [2019-10-13 21:08:49,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1097 transitions. [2019-10-13 21:08:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 21:08:49,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:49,214 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] [2019-10-13 21:08:49,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,423 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,423 INFO L82 PathProgramCache]: Analyzing trace with hash -916200834, now seen corresponding path program 1 times [2019-10-13 21:08:49,424 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266913219] [2019-10-13 21:08:49,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:49,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266913219] [2019-10-13 21:08:49,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040498028] [2019-10-13 21:08:49,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:50,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:50,337 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:08:50,519 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:50,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:50,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290448978] [2019-10-13 21:08:50,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:50,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:50,521 INFO L87 Difference]: Start difference. First operand 695 states and 1097 transitions. Second operand 4 states. [2019-10-13 21:08:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,797 INFO L93 Difference]: Finished difference Result 1401 states and 2241 transitions. [2019-10-13 21:08:50,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:50,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-13 21:08:50,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,805 INFO L225 Difference]: With dead ends: 1401 [2019-10-13 21:08:50,805 INFO L226 Difference]: Without dead ends: 734 [2019-10-13 21:08:50,810 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 [2019-10-13 21:08:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-13 21:08:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2019-10-13 21:08:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2019-10-13 21:08:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1171 transitions. [2019-10-13 21:08:50,842 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1171 transitions. Word has length 163 [2019-10-13 21:08:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,842 INFO L462 AbstractCegarLoop]: Abstraction has 734 states and 1171 transitions. [2019-10-13 21:08:50,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1171 transitions. [2019-10-13 21:08:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 21:08:50,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,849 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] [2019-10-13 21:08:51,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,067 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash -444482810, now seen corresponding path program 1 times [2019-10-13 21:08:51,068 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:51,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65419351] [2019-10-13 21:08:51,068 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:51,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:51,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:51,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65419351] [2019-10-13 21:08:51,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662160923] [2019-10-13 21:08:51,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 3001 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:51,919 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:52,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:52,165 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:52,165 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762146348] [2019-10-13 21:08:52,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:52,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:52,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:52,167 INFO L87 Difference]: Start difference. First operand 734 states and 1171 transitions. Second operand 7 states. [2019-10-13 21:08:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:52,343 INFO L93 Difference]: Finished difference Result 1454 states and 2332 transitions. [2019-10-13 21:08:52,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:52,344 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-13 21:08:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:52,351 INFO L225 Difference]: With dead ends: 1454 [2019-10-13 21:08:52,351 INFO L226 Difference]: Without dead ends: 748 [2019-10-13 21:08:52,357 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 [2019-10-13 21:08:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-10-13 21:08:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 741. [2019-10-13 21:08:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2019-10-13 21:08:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1182 transitions. [2019-10-13 21:08:52,396 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1182 transitions. Word has length 165 [2019-10-13 21:08:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:52,396 INFO L462 AbstractCegarLoop]: Abstraction has 741 states and 1182 transitions. [2019-10-13 21:08:52,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1182 transitions. [2019-10-13 21:08:52,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:08:52,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:52,435 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] [2019-10-13 21:08:52,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,643 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 762157303, now seen corresponding path program 1 times [2019-10-13 21:08:52,644 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:52,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597708872] [2019-10-13 21:08:52,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,645 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:52,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597708872] [2019-10-13 21:08:52,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792020641] [2019-10-13 21:08:52,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:53,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:53,360 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:53,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:53,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:53,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310951694] [2019-10-13 21:08:53,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:53,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:53,516 INFO L87 Difference]: Start difference. First operand 741 states and 1182 transitions. Second operand 4 states. [2019-10-13 21:08:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,618 INFO L93 Difference]: Finished difference Result 1467 states and 2352 transitions. [2019-10-13 21:08:53,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:53,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:08:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,625 INFO L225 Difference]: With dead ends: 1467 [2019-10-13 21:08:53,625 INFO L226 Difference]: Without dead ends: 752 [2019-10-13 21:08:53,630 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 [2019-10-13 21:08:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2019-10-13 21:08:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2019-10-13 21:08:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-13 21:08:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1190 transitions. [2019-10-13 21:08:53,696 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1190 transitions. Word has length 166 [2019-10-13 21:08:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,697 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1190 transitions. [2019-10-13 21:08:53,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1190 transitions. [2019-10-13 21:08:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:08:53,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,703 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] [2019-10-13 21:08:53,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,912 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash -32158381, now seen corresponding path program 1 times [2019-10-13 21:08:53,913 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432409609] [2019-10-13 21:08:53,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:54,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432409609] [2019-10-13 21:08:54,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062135696] [2019-10-13 21:08:54,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:54,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:54,753 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:08:55,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:55,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:55,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322328564] [2019-10-13 21:08:55,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:55,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:55,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:55,041 INFO L87 Difference]: Start difference. First operand 750 states and 1190 transitions. Second operand 7 states. [2019-10-13 21:08:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,198 INFO L93 Difference]: Finished difference Result 1471 states and 2346 transitions. [2019-10-13 21:08:55,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:55,199 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2019-10-13 21:08:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,205 INFO L225 Difference]: With dead ends: 1471 [2019-10-13 21:08:55,205 INFO L226 Difference]: Without dead ends: 762 [2019-10-13 21:08:55,210 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 [2019-10-13 21:08:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-10-13 21:08:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 750. [2019-10-13 21:08:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-13 21:08:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1190 transitions. [2019-10-13 21:08:55,244 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1190 transitions. Word has length 166 [2019-10-13 21:08:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,244 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1190 transitions. [2019-10-13 21:08:55,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1190 transitions. [2019-10-13 21:08:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-13 21:08:55,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,252 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] [2019-10-13 21:08:55,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,463 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1189046705, now seen corresponding path program 1 times [2019-10-13 21:08:55,464 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:55,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989306889] [2019-10-13 21:08:55,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:55,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:55,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989306889] [2019-10-13 21:08:55,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537391318] [2019-10-13 21:08:55,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 3004 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:56,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:08:56,464 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:56,603 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:56,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:56,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700423144] [2019-10-13 21:08:56,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:56,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:56,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:56,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:56,607 INFO L87 Difference]: Start difference. First operand 750 states and 1190 transitions. Second operand 5 states. [2019-10-13 21:08:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:56,710 INFO L93 Difference]: Finished difference Result 1447 states and 2313 transitions. [2019-10-13 21:08:56,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:56,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-10-13 21:08:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:56,722 INFO L225 Difference]: With dead ends: 1447 [2019-10-13 21:08:56,722 INFO L226 Difference]: Without dead ends: 750 [2019-10-13 21:08:56,727 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 [2019-10-13 21:08:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2019-10-13 21:08:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2019-10-13 21:08:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-13 21:08:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1185 transitions. [2019-10-13 21:08:56,760 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1185 transitions. Word has length 169 [2019-10-13 21:08:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:56,761 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1185 transitions. [2019-10-13 21:08:56,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1185 transitions. [2019-10-13 21:08:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:08:56,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:56,767 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] [2019-10-13 21:08:56,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,975 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1058024854, now seen corresponding path program 1 times [2019-10-13 21:08:56,976 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:56,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929564358] [2019-10-13 21:08:56,976 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:57,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929564358] [2019-10-13 21:08:57,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996034328] [2019-10-13 21:08:57,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 3005 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:57,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:57,806 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:08:57,965 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:57,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:57,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337950664] [2019-10-13 21:08:57,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:57,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:57,968 INFO L87 Difference]: Start difference. First operand 750 states and 1185 transitions. Second operand 5 states. [2019-10-13 21:08:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:58,195 INFO L93 Difference]: Finished difference Result 1443 states and 2304 transitions. [2019-10-13 21:08:58,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:58,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2019-10-13 21:08:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:58,203 INFO L225 Difference]: With dead ends: 1443 [2019-10-13 21:08:58,203 INFO L226 Difference]: Without dead ends: 792 [2019-10-13 21:08:58,207 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 [2019-10-13 21:08:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2019-10-13 21:08:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 789. [2019-10-13 21:08:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 789 states. [2019-10-13 21:08:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1258 transitions. [2019-10-13 21:08:58,236 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1258 transitions. Word has length 170 [2019-10-13 21:08:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:58,238 INFO L462 AbstractCegarLoop]: Abstraction has 789 states and 1258 transitions. [2019-10-13 21:08:58,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1258 transitions. [2019-10-13 21:08:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:08:58,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:58,244 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] [2019-10-13 21:08:58,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,452 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2107428973, now seen corresponding path program 1 times [2019-10-13 21:08:58,452 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:58,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768904973] [2019-10-13 21:08:58,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:08:58,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768904973] [2019-10-13 21:08:58,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053105536] [2019-10-13 21:08:58,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:59,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:08:59,257 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:08:59,580 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:59,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:59,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211434945] [2019-10-13 21:08:59,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:59,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:59,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:59,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:59,582 INFO L87 Difference]: Start difference. First operand 789 states and 1258 transitions. Second operand 11 states. [2019-10-13 21:08:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:59,788 INFO L93 Difference]: Finished difference Result 1463 states and 2328 transitions. [2019-10-13 21:08:59,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:59,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-10-13 21:08:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:59,795 INFO L225 Difference]: With dead ends: 1463 [2019-10-13 21:08:59,796 INFO L226 Difference]: Without dead ends: 812 [2019-10-13 21:08:59,800 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 [2019-10-13 21:08:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-10-13 21:08:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 796. [2019-10-13 21:08:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-10-13 21:08:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1267 transitions. [2019-10-13 21:08:59,827 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1267 transitions. Word has length 171 [2019-10-13 21:08:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:59,828 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1267 transitions. [2019-10-13 21:08:59,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1267 transitions. [2019-10-13 21:08:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:08:59,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:59,833 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] [2019-10-13 21:09:00,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,042 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:00,043 INFO L82 PathProgramCache]: Analyzing trace with hash 863803383, now seen corresponding path program 1 times [2019-10-13 21:09:00,043 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:00,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924462672] [2019-10-13 21:09:00,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:00,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924462672] [2019-10-13 21:09:00,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117930963] [2019-10-13 21:09:00,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:00,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:09:00,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:00,926 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:00,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:09:00,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035591598] [2019-10-13 21:09:00,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:09:00,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:09:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:00,928 INFO L87 Difference]: Start difference. First operand 796 states and 1267 transitions. Second operand 6 states. [2019-10-13 21:09:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:01,014 INFO L93 Difference]: Finished difference Result 1505 states and 2403 transitions. [2019-10-13 21:09:01,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:01,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2019-10-13 21:09:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:01,021 INFO L225 Difference]: With dead ends: 1505 [2019-10-13 21:09:01,021 INFO L226 Difference]: Without dead ends: 796 [2019-10-13 21:09:01,025 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 [2019-10-13 21:09:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2019-10-13 21:09:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 796. [2019-10-13 21:09:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-10-13 21:09:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1264 transitions. [2019-10-13 21:09:01,061 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1264 transitions. Word has length 173 [2019-10-13 21:09:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:01,061 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1264 transitions. [2019-10-13 21:09:01,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:09:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1264 transitions. [2019-10-13 21:09:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:09:01,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:01,067 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] [2019-10-13 21:09:01,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:01,273 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 674320387, now seen corresponding path program 1 times [2019-10-13 21:09:01,274 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:01,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707472627] [2019-10-13 21:09:01,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:01,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:01,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707472627] [2019-10-13 21:09:01,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411128846] [2019-10-13 21:09:01,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:02,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:02,227 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:02,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:02,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:02,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597982671] [2019-10-13 21:09:02,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:02,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:02,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:02,539 INFO L87 Difference]: Start difference. First operand 796 states and 1264 transitions. Second operand 5 states. [2019-10-13 21:09:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:03,494 INFO L93 Difference]: Finished difference Result 1451 states and 2341 transitions. [2019-10-13 21:09:03,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:03,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2019-10-13 21:09:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:03,501 INFO L225 Difference]: With dead ends: 1451 [2019-10-13 21:09:03,501 INFO L226 Difference]: Without dead ends: 804 [2019-10-13 21:09:03,505 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 [2019-10-13 21:09:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2019-10-13 21:09:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 804. [2019-10-13 21:09:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 804 states. [2019-10-13 21:09:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1277 transitions. [2019-10-13 21:09:03,535 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1277 transitions. Word has length 174 [2019-10-13 21:09:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:03,536 INFO L462 AbstractCegarLoop]: Abstraction has 804 states and 1277 transitions. [2019-10-13 21:09:03,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1277 transitions. [2019-10-13 21:09:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 21:09:03,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:03,541 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] [2019-10-13 21:09:03,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:03,751 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:03,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1642697509, now seen corresponding path program 1 times [2019-10-13 21:09:03,751 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:03,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620907271] [2019-10-13 21:09:03,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:03,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:03,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620907271] [2019-10-13 21:09:03,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496488720] [2019-10-13 21:09:03,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:04,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 3010 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:04,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:04,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:04,908 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:04,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:04,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022289575] [2019-10-13 21:09:04,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:04,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:04,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:04,910 INFO L87 Difference]: Start difference. First operand 804 states and 1277 transitions. Second operand 5 states. [2019-10-13 21:09:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:05,829 INFO L93 Difference]: Finished difference Result 1467 states and 2364 transitions. [2019-10-13 21:09:05,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:05,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2019-10-13 21:09:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:05,836 INFO L225 Difference]: With dead ends: 1467 [2019-10-13 21:09:05,837 INFO L226 Difference]: Without dead ends: 812 [2019-10-13 21:09:05,841 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 [2019-10-13 21:09:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2019-10-13 21:09:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2019-10-13 21:09:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-10-13 21:09:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1290 transitions. [2019-10-13 21:09:05,870 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1290 transitions. Word has length 176 [2019-10-13 21:09:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:05,870 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1290 transitions. [2019-10-13 21:09:05,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1290 transitions. [2019-10-13 21:09:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:09:05,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:05,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:06,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:06,084 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1977942659, now seen corresponding path program 1 times [2019-10-13 21:09:06,085 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:06,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701943978] [2019-10-13 21:09:06,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:06,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:06,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:06,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701943978] [2019-10-13 21:09:06,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154642110] [2019-10-13 21:09:06,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:06,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:06,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:06,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:07,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:07,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:07,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421044243] [2019-10-13 21:09:07,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:07,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:07,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:07,249 INFO L87 Difference]: Start difference. First operand 812 states and 1290 transitions. Second operand 5 states. [2019-10-13 21:09:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:08,164 INFO L93 Difference]: Finished difference Result 1483 states and 2387 transitions. [2019-10-13 21:09:08,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:08,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2019-10-13 21:09:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:08,170 INFO L225 Difference]: With dead ends: 1483 [2019-10-13 21:09:08,170 INFO L226 Difference]: Without dead ends: 820 [2019-10-13 21:09:08,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 346 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2019-10-13 21:09:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 820. [2019-10-13 21:09:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2019-10-13 21:09:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1303 transitions. [2019-10-13 21:09:08,200 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1303 transitions. Word has length 178 [2019-10-13 21:09:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:08,200 INFO L462 AbstractCegarLoop]: Abstraction has 820 states and 1303 transitions. [2019-10-13 21:09:08,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1303 transitions. [2019-10-13 21:09:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:09:08,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:08,206 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] [2019-10-13 21:09:08,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:08,414 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:08,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:08,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1043965741, now seen corresponding path program 1 times [2019-10-13 21:09:08,414 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:08,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124172609] [2019-10-13 21:09:08,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:08,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:08,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:08,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124172609] [2019-10-13 21:09:08,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297451697] [2019-10-13 21:09:08,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:09,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:09,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:09,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:09,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:09,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-13 21:09:09,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655179840] [2019-10-13 21:09:09,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:09,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:09,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:09,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:09,623 INFO L87 Difference]: Start difference. First operand 820 states and 1303 transitions. Second operand 5 states. [2019-10-13 21:09:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:10,727 INFO L93 Difference]: Finished difference Result 1499 states and 2410 transitions. [2019-10-13 21:09:10,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:10,728 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-10-13 21:09:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:10,734 INFO L225 Difference]: With dead ends: 1499 [2019-10-13 21:09:10,734 INFO L226 Difference]: Without dead ends: 828 [2019-10-13 21:09:10,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-13 21:09:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-13 21:09:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-13 21:09:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1316 transitions. [2019-10-13 21:09:10,766 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1316 transitions. Word has length 180 [2019-10-13 21:09:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:10,767 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1316 transitions. [2019-10-13 21:09:10,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1316 transitions. [2019-10-13 21:09:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 21:09:10,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:10,773 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] [2019-10-13 21:09:10,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:10,983 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash 567339875, now seen corresponding path program 1 times [2019-10-13 21:09:10,984 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:10,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687901780] [2019-10-13 21:09:10,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:10,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:11,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687901780] [2019-10-13 21:09:11,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254280440] [2019-10-13 21:09:11,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:11,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 3014 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:09:11,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:11,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:11,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:11,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:09:11,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001733198] [2019-10-13 21:09:11,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:11,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:11,929 INFO L87 Difference]: Start difference. First operand 828 states and 1316 transitions. Second operand 4 states. [2019-10-13 21:09:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:11,990 INFO L93 Difference]: Finished difference Result 1615 states and 2588 transitions. [2019-10-13 21:09:11,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:11,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 182 [2019-10-13 21:09:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:11,996 INFO L225 Difference]: With dead ends: 1615 [2019-10-13 21:09:11,997 INFO L226 Difference]: Without dead ends: 805 [2019-10-13 21:09:12,000 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 [2019-10-13 21:09:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2019-10-13 21:09:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2019-10-13 21:09:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2019-10-13 21:09:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1273 transitions. [2019-10-13 21:09:12,029 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1273 transitions. Word has length 182 [2019-10-13 21:09:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:12,030 INFO L462 AbstractCegarLoop]: Abstraction has 805 states and 1273 transitions. [2019-10-13 21:09:12,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1273 transitions. [2019-10-13 21:09:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:09:12,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:12,034 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] [2019-10-13 21:09:12,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:12,251 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1660003128, now seen corresponding path program 1 times [2019-10-13 21:09:12,252 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:12,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670819425] [2019-10-13 21:09:12,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:12,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670819425] [2019-10-13 21:09:12,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873713839] [2019-10-13 21:09:12,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:13,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:13,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:13,172 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:13,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:13,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:09:13,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407606443] [2019-10-13 21:09:13,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:13,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:13,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:13,441 INFO L87 Difference]: Start difference. First operand 805 states and 1273 transitions. Second operand 7 states. [2019-10-13 21:09:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:13,560 INFO L93 Difference]: Finished difference Result 1564 states and 2481 transitions. [2019-10-13 21:09:13,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:13,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 180 [2019-10-13 21:09:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:13,570 INFO L225 Difference]: With dead ends: 1564 [2019-10-13 21:09:13,571 INFO L226 Difference]: Without dead ends: 807 [2019-10-13 21:09:13,575 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 [2019-10-13 21:09:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2019-10-13 21:09:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 799. [2019-10-13 21:09:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2019-10-13 21:09:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2019-10-13 21:09:13,606 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 180 [2019-10-13 21:09:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:13,607 INFO L462 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2019-10-13 21:09:13,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2019-10-13 21:09:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:09:13,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:13,612 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] [2019-10-13 21:09:13,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:13,821 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2098072582, now seen corresponding path program 1 times [2019-10-13 21:09:13,822 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:13,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352870451] [2019-10-13 21:09:13,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:13,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:13,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352870451] [2019-10-13 21:09:13,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772574989] [2019-10-13 21:09:13,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:14,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:14,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:15,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:09:15,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:15,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 19 [2019-10-13 21:09:15,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952900360] [2019-10-13 21:09:15,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:15,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:09:15,112 INFO L87 Difference]: Start difference. First operand 799 states and 1259 transitions. Second operand 9 states.