/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:41:08,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:41:08,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:41:08,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:41:08,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:41:08,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:41:08,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:41:08,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:41:08,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:41:08,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:41:08,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:41:08,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:41:08,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:41:08,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:41:08,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:41:08,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:41:08,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:41:08,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:41:08,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:41:08,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:41:08,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:41:08,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:41:08,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:41:08,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:41:08,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:41:08,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:41:08,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:41:08,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:41:08,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:41:08,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:41:08,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:41:08,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:41:08,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:41:08,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:41:08,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:41:08,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:41:08,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:41:08,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:41:08,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:41:08,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:41:08,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:41:08,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:41:08,500 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:41:08,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:41:08,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:41:08,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:41:08,502 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:41:08,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:41:08,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:41:08,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:41:08,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:41:08,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:41:08,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:41:08,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:41:08,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:41:08,504 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:41:08,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:41:08,504 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:41:08,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:41:08,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:41:08,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:41:08,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:41:08,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:41:08,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:41:08,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:41:08,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:41:08,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:41:08,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:41:08,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:41:08,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:41:08,507 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 [2019-11-07 00:41:08,769 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:41:08,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:41:08,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:41:08,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:41:08,786 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:41:08,787 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c [2019-11-07 00:41:08,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82a7797d/cb5496b68883407dbd84406e3d416f16/FLAG5c29c4346 [2019-11-07 00:41:09,519 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:41:09,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product29.cil.c [2019-11-07 00:41:09,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82a7797d/cb5496b68883407dbd84406e3d416f16/FLAG5c29c4346 [2019-11-07 00:41:09,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a82a7797d/cb5496b68883407dbd84406e3d416f16 [2019-11-07 00:41:09,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:41:09,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:41:09,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:41:09,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:41:09,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:41:09,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:09" (1/1) ... [2019-11-07 00:41:09,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510f79ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:09, skipping insertion in model container [2019-11-07 00:41:09,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:41:09" (1/1) ... [2019-11-07 00:41:09,720 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:41:09,803 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:41:10,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:41:10,617 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:41:10,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:41:10,770 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:41:10,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10 WrapperNode [2019-11-07 00:41:10,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:41:10,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:41:10,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:41:10,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:41:10,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... [2019-11-07 00:41:10,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:41:10,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:41:10,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:41:10,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:41:10,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:41:11,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:41:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:41:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:41:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:41:11,054 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:41:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:41:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:41:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:41:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:41:11,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:41:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:41:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:41:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:41:11,056 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:41:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:41:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:41:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:41:11,057 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:41:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:41:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:41:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:41:11,058 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:41:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:41:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:41:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:41:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:41:11,059 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:41:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:41:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:41:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:41:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:41:11,060 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:41:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:41:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:41:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:41:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:41:11,061 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:41:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:41:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:41:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:41:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:41:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:41:11,062 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:41:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:41:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:41:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:41:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:41:11,063 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:41:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:41:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:41:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:41:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:41:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:41:11,064 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:41:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:41:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:41:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:41:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:41:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:41:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:41:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:41:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:41:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:41:11,066 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:41:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:41:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:41:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:41:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:41:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:41:11,067 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:41:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:41:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:41:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:41:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:41:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:41:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:41:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:41:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:41:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:41:11,069 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:41:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:41:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:41:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:41:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:41:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:41:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-11-07 00:41:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-11-07 00:41:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-11-07 00:41:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-11-07 00:41:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:41:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:41:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:41:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:41:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:41:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:41:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:41:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:41:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:41:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:41:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:41:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:41:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:41:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:41:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:41:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:41:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:41:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:41:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:41:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:41:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:41:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:41:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:41:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:41:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:41:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:41:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:41:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:41:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:41:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:41:11,077 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:41:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:41:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:41:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:41:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:41:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:41:11,078 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:41:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:41:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:41:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:41:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:41:11,079 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:41:11,080 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:41:11,080 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:41:11,080 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:41:11,080 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:41:11,080 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:41:11,080 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:41:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:41:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:41:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:41:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:41:11,081 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:41:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:41:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:41:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:41:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:41:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:41:11,082 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:41:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:41:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:41:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:41:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:41:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:41:11,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:41:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:41:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:41:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:41:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:41:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:41:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:41:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:41:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:41:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:41:13,618 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:41:13,618 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:41:13,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:13 BoogieIcfgContainer [2019-11-07 00:41:13,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:41:13,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:41:13,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:41:13,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:41:13,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:41:09" (1/3) ... [2019-11-07 00:41:13,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b970142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:13, skipping insertion in model container [2019-11-07 00:41:13,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:41:10" (2/3) ... [2019-11-07 00:41:13,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b970142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:41:13, skipping insertion in model container [2019-11-07 00:41:13,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:41:13" (3/3) ... [2019-11-07 00:41:13,630 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2019-11-07 00:41:13,642 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:41:13,651 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:41:13,663 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:41:13,698 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:41:13,698 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:41:13,698 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:41:13,698 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:41:13,698 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:41:13,699 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:41:13,699 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:41:13,699 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:41:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-11-07 00:41:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 00:41:13,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:13,771 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:41:13,773 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 902898907, now seen corresponding path program 1 times [2019-11-07 00:41:13,794 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:13,794 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975458726] [2019-11-07 00:41:13,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:14,548 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975458726] [2019-11-07 00:41:14,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278154673] [2019-11-07 00:41:14,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:15,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-07 00:41:15,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:15,351 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:15,703 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:15,703 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-11-07 00:41:15,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802829964] [2019-11-07 00:41:15,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:41:15,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:15,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:41:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:41:15,736 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 2 states. [2019-11-07 00:41:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:15,821 INFO L93 Difference]: Finished difference Result 673 states and 1068 transitions. [2019-11-07 00:41:15,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:41:15,823 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 155 [2019-11-07 00:41:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:15,865 INFO L225 Difference]: With dead ends: 673 [2019-11-07 00:41:15,866 INFO L226 Difference]: Without dead ends: 636 [2019-11-07 00:41:15,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:41:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-11-07 00:41:15,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-11-07 00:41:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:41:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1013 transitions. [2019-11-07 00:41:15,993 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1013 transitions. Word has length 155 [2019-11-07 00:41:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:15,995 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1013 transitions. [2019-11-07 00:41:15,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:41:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1013 transitions. [2019-11-07 00:41:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 00:41:16,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:16,010 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:16,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:16,212 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:16,213 INFO L82 PathProgramCache]: Analyzing trace with hash 598223950, now seen corresponding path program 1 times [2019-11-07 00:41:16,214 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:16,214 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365754260] [2019-11-07 00:41:16,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:16,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365754260] [2019-11-07 00:41:16,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226075060] [2019-11-07 00:41:16,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:17,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 3276 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:17,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:17,267 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:17,576 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:17,576 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:17,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41118942] [2019-11-07 00:41:17,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:17,578 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:17,579 INFO L87 Difference]: Start difference. First operand 636 states and 1013 transitions. Second operand 4 states. [2019-11-07 00:41:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:17,717 INFO L93 Difference]: Finished difference Result 1244 states and 1999 transitions. [2019-11-07 00:41:17,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:17,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-11-07 00:41:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:17,736 INFO L225 Difference]: With dead ends: 1244 [2019-11-07 00:41:17,736 INFO L226 Difference]: Without dead ends: 636 [2019-11-07 00:41:17,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-11-07 00:41:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-11-07 00:41:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:41:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1012 transitions. [2019-11-07 00:41:17,802 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1012 transitions. Word has length 157 [2019-11-07 00:41:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:17,804 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1012 transitions. [2019-11-07 00:41:17,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1012 transitions. [2019-11-07 00:41:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:41:17,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:17,814 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:18,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:18,031 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:18,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1074530708, now seen corresponding path program 1 times [2019-11-07 00:41:18,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:18,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017649912] [2019-11-07 00:41:18,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:18,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017649912] [2019-11-07 00:41:18,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458119770] [2019-11-07 00:41:18,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:18,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:18,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:19,013 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:19,257 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:19,257 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:19,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565933973] [2019-11-07 00:41:19,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:19,259 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:19,260 INFO L87 Difference]: Start difference. First operand 636 states and 1012 transitions. Second operand 4 states. [2019-11-07 00:41:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:19,340 INFO L93 Difference]: Finished difference Result 1244 states and 1997 transitions. [2019-11-07 00:41:19,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:19,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-11-07 00:41:19,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:19,347 INFO L225 Difference]: With dead ends: 1244 [2019-11-07 00:41:19,348 INFO L226 Difference]: Without dead ends: 636 [2019-11-07 00:41:19,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-11-07 00:41:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2019-11-07 00:41:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:41:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1011 transitions. [2019-11-07 00:41:19,388 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1011 transitions. Word has length 159 [2019-11-07 00:41:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:19,388 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1011 transitions. [2019-11-07 00:41:19,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1011 transitions. [2019-11-07 00:41:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:41:19,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:19,394 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:19,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:19,604 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 480608966, now seen corresponding path program 1 times [2019-11-07 00:41:19,605 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:19,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060738056] [2019-11-07 00:41:19,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:19,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060738056] [2019-11-07 00:41:19,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172092178] [2019-11-07 00:41:19,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:20,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:20,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:20,424 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:20,693 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:20,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:20,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373125215] [2019-11-07 00:41:20,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:20,694 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:20,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:20,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:20,695 INFO L87 Difference]: Start difference. First operand 636 states and 1011 transitions. Second operand 4 states. [2019-11-07 00:41:20,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:20,782 INFO L93 Difference]: Finished difference Result 1251 states and 2004 transitions. [2019-11-07 00:41:20,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:20,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2019-11-07 00:41:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:20,789 INFO L225 Difference]: With dead ends: 1251 [2019-11-07 00:41:20,789 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:20,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1023 transitions. [2019-11-07 00:41:20,820 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1023 transitions. Word has length 161 [2019-11-07 00:41:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:20,820 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1023 transitions. [2019-11-07 00:41:20,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1023 transitions. [2019-11-07 00:41:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-07 00:41:20,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:20,826 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:21,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:21,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 744578377, now seen corresponding path program 1 times [2019-11-07 00:41:21,036 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:21,037 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146030951] [2019-11-07 00:41:21,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:21,150 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146030951] [2019-11-07 00:41:21,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656642556] [2019-11-07 00:41:21,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:21,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:21,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:21,865 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:22,169 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:22,170 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 00:41:22,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150732518] [2019-11-07 00:41:22,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:22,172 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:22,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:22,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:22,173 INFO L87 Difference]: Start difference. First operand 645 states and 1023 transitions. Second operand 4 states. [2019-11-07 00:41:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:22,288 INFO L93 Difference]: Finished difference Result 1253 states and 2005 transitions. [2019-11-07 00:41:22,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:22,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-11-07 00:41:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:22,297 INFO L225 Difference]: With dead ends: 1253 [2019-11-07 00:41:22,297 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:22,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:41:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1022 transitions. [2019-11-07 00:41:22,334 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1022 transitions. Word has length 162 [2019-11-07 00:41:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:22,334 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1022 transitions. [2019-11-07 00:41:22,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1022 transitions. [2019-11-07 00:41:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:41:22,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:22,343 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:22,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:22,563 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -831847774, now seen corresponding path program 1 times [2019-11-07 00:41:22,564 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:22,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44262937] [2019-11-07 00:41:22,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:22,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44262937] [2019-11-07 00:41:22,711 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959534056] [2019-11-07 00:41:22,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:23,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:23,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:23,426 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:23,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:23,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:41:23,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409697177] [2019-11-07 00:41:23,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:23,665 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:41:23,665 INFO L87 Difference]: Start difference. First operand 645 states and 1022 transitions. Second operand 4 states. [2019-11-07 00:41:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:23,756 INFO L93 Difference]: Finished difference Result 1253 states and 2004 transitions. [2019-11-07 00:41:23,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:23,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-11-07 00:41:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:23,764 INFO L225 Difference]: With dead ends: 1253 [2019-11-07 00:41:23,764 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:23,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1021 transitions. [2019-11-07 00:41:23,799 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1021 transitions. Word has length 163 [2019-11-07 00:41:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:23,800 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1021 transitions. [2019-11-07 00:41:23,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1021 transitions. [2019-11-07 00:41:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:41:23,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:23,808 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:24,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:24,019 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 669005797, now seen corresponding path program 1 times [2019-11-07 00:41:24,021 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:24,021 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044391747] [2019-11-07 00:41:24,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:24,241 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044391747] [2019-11-07 00:41:24,241 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097051336] [2019-11-07 00:41:24,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:24,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 3283 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:24,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:41:24,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:25,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:25,254 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:25,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420369895] [2019-11-07 00:41:25,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:25,256 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:25,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:25,256 INFO L87 Difference]: Start difference. First operand 645 states and 1021 transitions. Second operand 4 states. [2019-11-07 00:41:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:25,440 INFO L93 Difference]: Finished difference Result 1252 states and 2004 transitions. [2019-11-07 00:41:25,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:25,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-11-07 00:41:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:25,446 INFO L225 Difference]: With dead ends: 1252 [2019-11-07 00:41:25,446 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:25,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1016 transitions. [2019-11-07 00:41:25,472 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1016 transitions. Word has length 164 [2019-11-07 00:41:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:25,473 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1016 transitions. [2019-11-07 00:41:25,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1016 transitions. [2019-11-07 00:41:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 00:41:25,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:25,478 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:25,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:25,688 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1950074191, now seen corresponding path program 1 times [2019-11-07 00:41:25,690 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:25,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309603977] [2019-11-07 00:41:25,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:26,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309603977] [2019-11-07 00:41:26,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218461870] [2019-11-07 00:41:26,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:26,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 3285 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:26,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:41:26,815 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:27,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:27,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:27,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689288427] [2019-11-07 00:41:27,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:27,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:27,047 INFO L87 Difference]: Start difference. First operand 645 states and 1016 transitions. Second operand 4 states. [2019-11-07 00:41:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:27,208 INFO L93 Difference]: Finished difference Result 1252 states and 1994 transitions. [2019-11-07 00:41:27,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:41:27,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-11-07 00:41:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:27,219 INFO L225 Difference]: With dead ends: 1252 [2019-11-07 00:41:27,220 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:41:27,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:41:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-11-07 00:41:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:41:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1011 transitions. [2019-11-07 00:41:27,258 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1011 transitions. Word has length 166 [2019-11-07 00:41:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:27,258 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1011 transitions. [2019-11-07 00:41:27,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1011 transitions. [2019-11-07 00:41:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-07 00:41:27,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:27,264 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:27,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:27,483 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash 889413103, now seen corresponding path program 1 times [2019-11-07 00:41:27,484 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:27,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903453054] [2019-11-07 00:41:27,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:27,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903453054] [2019-11-07 00:41:27,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448832954] [2019-11-07 00:41:27,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:28,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 3287 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:28,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:41:28,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:28,752 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:28,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:28,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538539515] [2019-11-07 00:41:28,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:28,753 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:28,753 INFO L87 Difference]: Start difference. First operand 645 states and 1011 transitions. Second operand 4 states. [2019-11-07 00:41:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:28,975 INFO L93 Difference]: Finished difference Result 1288 states and 2043 transitions. [2019-11-07 00:41:28,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:28,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-11-07 00:41:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:28,984 INFO L225 Difference]: With dead ends: 1288 [2019-11-07 00:41:28,984 INFO L226 Difference]: Without dead ends: 684 [2019-11-07 00:41:28,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-11-07 00:41:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-11-07 00:41:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-11-07 00:41:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1075 transitions. [2019-11-07 00:41:29,020 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1075 transitions. Word has length 168 [2019-11-07 00:41:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:29,022 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1075 transitions. [2019-11-07 00:41:29,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1075 transitions. [2019-11-07 00:41:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:41:29,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:29,031 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:29,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:29,240 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 666131544, now seen corresponding path program 1 times [2019-11-07 00:41:29,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:29,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684060444] [2019-11-07 00:41:29,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:29,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684060444] [2019-11-07 00:41:29,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145991252] [2019-11-07 00:41:29,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:30,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:30,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:41:30,172 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:30,489 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:30,490 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-11-07 00:41:30,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756748695] [2019-11-07 00:41:30,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:30,491 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:30,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:30,491 INFO L87 Difference]: Start difference. First operand 684 states and 1075 transitions. Second operand 4 states. [2019-11-07 00:41:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:30,702 INFO L93 Difference]: Finished difference Result 1291 states and 2046 transitions. [2019-11-07 00:41:30,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:30,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-11-07 00:41:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:30,707 INFO L225 Difference]: With dead ends: 1291 [2019-11-07 00:41:30,707 INFO L226 Difference]: Without dead ends: 684 [2019-11-07 00:41:30,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2019-11-07 00:41:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2019-11-07 00:41:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-11-07 00:41:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1070 transitions. [2019-11-07 00:41:30,731 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1070 transitions. Word has length 169 [2019-11-07 00:41:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:30,731 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 1070 transitions. [2019-11-07 00:41:30,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1070 transitions. [2019-11-07 00:41:30,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 00:41:30,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:30,736 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:30,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:30,944 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1349098745, now seen corresponding path program 1 times [2019-11-07 00:41:30,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:30,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128876113] [2019-11-07 00:41:30,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:31,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128876113] [2019-11-07 00:41:31,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851526076] [2019-11-07 00:41:31,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:31,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:31,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:41:31,901 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:32,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:32,477 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:32,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-11-07 00:41:32,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549246693] [2019-11-07 00:41:32,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:32,479 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:32,479 INFO L87 Difference]: Start difference. First operand 684 states and 1070 transitions. Second operand 9 states. [2019-11-07 00:41:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:32,755 INFO L93 Difference]: Finished difference Result 1304 states and 2060 transitions. [2019-11-07 00:41:32,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:32,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 169 [2019-11-07 00:41:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:32,763 INFO L225 Difference]: With dead ends: 1304 [2019-11-07 00:41:32,763 INFO L226 Difference]: Without dead ends: 700 [2019-11-07 00:41:32,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 323 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:41:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-11-07 00:41:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 693. [2019-11-07 00:41:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-11-07 00:41:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1083 transitions. [2019-11-07 00:41:32,800 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1083 transitions. Word has length 169 [2019-11-07 00:41:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:32,801 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1083 transitions. [2019-11-07 00:41:32,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1083 transitions. [2019-11-07 00:41:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:41:32,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:32,807 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:33,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:33,019 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:33,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1532717939, now seen corresponding path program 1 times [2019-11-07 00:41:33,020 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:33,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760707669] [2019-11-07 00:41:33,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:41:33,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760707669] [2019-11-07 00:41:33,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517780751] [2019-11-07 00:41:33,186 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 [2019-11-07 00:41:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:33,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:41:33,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:41:33,961 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:34,208 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:41:34,209 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 00:41:34,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821718263] [2019-11-07 00:41:34,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:41:34,210 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:41:34,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:41:34,210 INFO L87 Difference]: Start difference. First operand 693 states and 1083 transitions. Second operand 4 states. [2019-11-07 00:41:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:34,370 INFO L93 Difference]: Finished difference Result 1305 states and 2063 transitions. [2019-11-07 00:41:34,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:41:34,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-11-07 00:41:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:34,375 INFO L225 Difference]: With dead ends: 1305 [2019-11-07 00:41:34,375 INFO L226 Difference]: Without dead ends: 693 [2019-11-07 00:41:34,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:41:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-11-07 00:41:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-11-07 00:41:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-11-07 00:41:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1078 transitions. [2019-11-07 00:41:34,401 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1078 transitions. Word has length 170 [2019-11-07 00:41:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:34,401 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1078 transitions. [2019-11-07 00:41:34,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:41:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1078 transitions. [2019-11-07 00:41:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:41:34,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:34,407 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:34,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:34,615 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -852054306, now seen corresponding path program 1 times [2019-11-07 00:41:34,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:34,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135990043] [2019-11-07 00:41:34,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:41:34,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135990043] [2019-11-07 00:41:34,720 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146568654] [2019-11-07 00:41:34,720 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 [2019-11-07 00:41:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:35,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:41:35,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:35,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:35,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:35,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-11-07 00:41:35,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817348034] [2019-11-07 00:41:35,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:35,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:35,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:35,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:35,984 INFO L87 Difference]: Start difference. First operand 693 states and 1078 transitions. Second operand 11 states. [2019-11-07 00:41:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:36,152 INFO L93 Difference]: Finished difference Result 1242 states and 1957 transitions. [2019-11-07 00:41:36,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:41:36,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-11-07 00:41:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:36,159 INFO L225 Difference]: With dead ends: 1242 [2019-11-07 00:41:36,159 INFO L226 Difference]: Without dead ends: 710 [2019-11-07 00:41:36,162 INFO L630 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 [2019-11-07 00:41:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2019-11-07 00:41:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 700. [2019-11-07 00:41:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-11-07 00:41:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1088 transitions. [2019-11-07 00:41:36,192 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1088 transitions. Word has length 171 [2019-11-07 00:41:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:36,192 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1088 transitions. [2019-11-07 00:41:36,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1088 transitions. [2019-11-07 00:41:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:41:36,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:36,198 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:36,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:36,405 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:36,406 INFO L82 PathProgramCache]: Analyzing trace with hash -753784112, now seen corresponding path program 1 times [2019-11-07 00:41:36,406 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:36,406 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790424438] [2019-11-07 00:41:36,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:41:36,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790424438] [2019-11-07 00:41:36,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596212653] [2019-11-07 00:41:36,652 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 [2019-11-07 00:41:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:37,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 3284 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 00:41:37,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:37,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:41:37,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:37,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-11-07 00:41:37,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17124751] [2019-11-07 00:41:37,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:41:37,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:37,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:41:37,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:41:37,913 INFO L87 Difference]: Start difference. First operand 700 states and 1088 transitions. Second operand 8 states. [2019-11-07 00:41:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:38,032 INFO L93 Difference]: Finished difference Result 1246 states and 1966 transitions. [2019-11-07 00:41:38,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:38,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2019-11-07 00:41:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:38,039 INFO L225 Difference]: With dead ends: 1246 [2019-11-07 00:41:38,040 INFO L226 Difference]: Without dead ends: 714 [2019-11-07 00:41:38,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2019-11-07 00:41:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 707. [2019-11-07 00:41:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-11-07 00:41:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1099 transitions. [2019-11-07 00:41:38,082 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1099 transitions. Word has length 170 [2019-11-07 00:41:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:38,082 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1099 transitions. [2019-11-07 00:41:38,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:41:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1099 transitions. [2019-11-07 00:41:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:41:38,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:38,089 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:38,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:38,299 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1017223344, now seen corresponding path program 1 times [2019-11-07 00:41:38,299 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:38,299 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496869822] [2019-11-07 00:41:38,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:38,490 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496869822] [2019-11-07 00:41:38,490 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32032411] [2019-11-07 00:41:38,490 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 [2019-11-07 00:41:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:39,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:39,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:39,381 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:39,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:39,912 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:39,912 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-11-07 00:41:39,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689558755] [2019-11-07 00:41:39,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:41:39,913 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:41:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-07 00:41:39,914 INFO L87 Difference]: Start difference. First operand 707 states and 1099 transitions. Second operand 14 states. [2019-11-07 00:41:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:40,219 INFO L93 Difference]: Finished difference Result 1247 states and 1966 transitions. [2019-11-07 00:41:40,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:41:40,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 170 [2019-11-07 00:41:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:40,225 INFO L225 Difference]: With dead ends: 1247 [2019-11-07 00:41:40,225 INFO L226 Difference]: Without dead ends: 715 [2019-11-07 00:41:40,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:41:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2019-11-07 00:41:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 707. [2019-11-07 00:41:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-11-07 00:41:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1099 transitions. [2019-11-07 00:41:40,267 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1099 transitions. Word has length 170 [2019-11-07 00:41:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:40,267 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1099 transitions. [2019-11-07 00:41:40,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:41:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1099 transitions. [2019-11-07 00:41:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:41:40,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:40,273 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:40,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:40,482 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash -618074511, now seen corresponding path program 1 times [2019-11-07 00:41:40,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:40,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549673291] [2019-11-07 00:41:40,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:40,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549673291] [2019-11-07 00:41:40,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108950350] [2019-11-07 00:41:40,646 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 [2019-11-07 00:41:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:41,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 00:41:41,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:41,575 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:41,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 00:41:42,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:42,073 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-11-07 00:41:42,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701976658] [2019-11-07 00:41:42,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-07 00:41:42,074 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-07 00:41:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:41:42,075 INFO L87 Difference]: Start difference. First operand 707 states and 1099 transitions. Second operand 11 states. [2019-11-07 00:41:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:42,298 INFO L93 Difference]: Finished difference Result 1248 states and 1974 transitions. [2019-11-07 00:41:42,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:41:42,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-11-07 00:41:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:42,306 INFO L225 Difference]: With dead ends: 1248 [2019-11-07 00:41:42,306 INFO L226 Difference]: Without dead ends: 716 [2019-11-07 00:41:42,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 329 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:41:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-11-07 00:41:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 709. [2019-11-07 00:41:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-11-07 00:41:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1105 transitions. [2019-11-07 00:41:42,338 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1105 transitions. Word has length 171 [2019-11-07 00:41:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:42,338 INFO L462 AbstractCegarLoop]: Abstraction has 709 states and 1105 transitions. [2019-11-07 00:41:42,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-07 00:41:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1105 transitions. [2019-11-07 00:41:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-07 00:41:42,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:42,344 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:41:42,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:41:42,552 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:41:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:41:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1414360821, now seen corresponding path program 1 times [2019-11-07 00:41:42,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:41:42,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338155782] [2019-11-07 00:41:42,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:41:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:41:42,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338155782] [2019-11-07 00:41:42,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188032091] [2019-11-07 00:41:42,655 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 [2019-11-07 00:41:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:41:43,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 3282 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 00:41:43,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:41:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:43,495 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:41:43,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:41:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:41:43,820 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:41:43,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-11-07 00:41:43,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998822908] [2019-11-07 00:41:43,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:41:43,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:41:43,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:41:43,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:41:43,822 INFO L87 Difference]: Start difference. First operand 709 states and 1105 transitions. Second operand 9 states. [2019-11-07 00:41:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:41:43,949 INFO L93 Difference]: Finished difference Result 1344 states and 2139 transitions. [2019-11-07 00:41:43,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:41:43,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2019-11-07 00:41:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:41:43,957 INFO L225 Difference]: With dead ends: 1344 [2019-11-07 00:41:43,957 INFO L226 Difference]: Without dead ends: 718 [2019-11-07 00:41:43,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:41:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2019-11-07 00:41:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 716. [2019-11-07 00:41:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-11-07 00:41:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1113 transitions. [2019-11-07 00:41:43,982 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1113 transitions. Word has length 172 [2019-11-07 00:41:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:41:43,983 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1113 transitions. [2019-11-07 00:41:43,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:41:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1113 transitions. [2019-11-07 00:41:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-07 00:41:43,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:41:43,988 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]