/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_spec14_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:26,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:26,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:26,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:26,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:26,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:26,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:26,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:26,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:27,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:27,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:27,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:27,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:27,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:27,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:27,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:27,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:27,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:27,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:27,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:27,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:27,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:27,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:27,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:27,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:27,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:27,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:27,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:27,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:27,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:27,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:27,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:27,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:27,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:27,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:27,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:27,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:27,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:27,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:27,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:27,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:27,046 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 00:39:27,079 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:27,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:27,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:27,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:27,081 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:27,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:27,081 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:27,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:27,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:27,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:27,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:27,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:27,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:27,086 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:27,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:27,086 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:27,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:27,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:27,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:27,087 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:27,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:27,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:27,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:27,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:27,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:27,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:27,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:27,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:27,089 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 00:39:27,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:27,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:27,398 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:27,400 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:27,400 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:27,401 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product28.cil.c [2019-11-07 00:39:27,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2009adc/f36c0717581c4758a270061ff2051273/FLAG3bd699ff3 [2019-11-07 00:39:28,062 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:28,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product28.cil.c [2019-11-07 00:39:28,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2009adc/f36c0717581c4758a270061ff2051273/FLAG3bd699ff3 [2019-11-07 00:39:28,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea2009adc/f36c0717581c4758a270061ff2051273 [2019-11-07 00:39:28,318 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:28,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:28,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:28,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:28,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:28,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:28" (1/1) ... [2019-11-07 00:39:28,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48e51f0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:28, skipping insertion in model container [2019-11-07 00:39:28,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:28" (1/1) ... [2019-11-07 00:39:28,340 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:28,432 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:29,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:29,146 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:29,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:29,429 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:29,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29 WrapperNode [2019-11-07 00:39:29,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:29,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:29,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:29,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:29,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (1/1) ... [2019-11-07 00:39:29,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:29,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:29,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:29,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:29,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (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 00:39:29,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:29,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:29,701 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:39:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:39:29,705 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:29,705 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:29,705 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:29,706 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:29,707 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:29,708 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 00:39:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 00:39:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:29,709 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:29,710 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:29,710 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:29,710 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:29,710 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:29,710 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:29,711 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:29,712 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:29,713 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:29,714 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:29,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:29,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:29,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:29,717 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:39:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:39:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:29,724 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 00:39:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 00:39:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:29,725 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:29,726 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:31,949 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:31,950 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:31,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:31 BoogieIcfgContainer [2019-11-07 00:39:31,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:31,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:31,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:31,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:31,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:28" (1/3) ... [2019-11-07 00:39:31,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cda271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:31, skipping insertion in model container [2019-11-07 00:39:31,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:29" (2/3) ... [2019-11-07 00:39:31,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cda271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:31, skipping insertion in model container [2019-11-07 00:39:31,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:31" (3/3) ... [2019-11-07 00:39:31,961 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2019-11-07 00:39:31,972 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:31,984 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:31,996 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:32,053 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:32,054 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:32,054 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:32,054 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:32,054 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:32,054 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:32,054 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:32,054 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states. [2019-11-07 00:39:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-07 00:39:32,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,126 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:32,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash 409688857, now seen corresponding path program 1 times [2019-11-07 00:39:32,147 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:32,147 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720276743] [2019-11-07 00:39:32,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:32,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720276743] [2019-11-07 00:39:32,761 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:32,762 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:32,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380780266] [2019-11-07 00:39:32,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:32,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:32,787 INFO L87 Difference]: Start difference. First operand 767 states. Second operand 4 states. [2019-11-07 00:39:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,988 INFO L93 Difference]: Finished difference Result 1218 states and 1946 transitions. [2019-11-07 00:39:32,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:32,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-11-07 00:39:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,022 INFO L225 Difference]: With dead ends: 1218 [2019-11-07 00:39:33,023 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:33,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:39:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:39:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 964 transitions. [2019-11-07 00:39:33,150 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 964 transitions. Word has length 87 [2019-11-07 00:39:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,150 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 964 transitions. [2019-11-07 00:39:33,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 964 transitions. [2019-11-07 00:39:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-07 00:39:33,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,155 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:33,156 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash -728771867, now seen corresponding path program 1 times [2019-11-07 00:39:33,157 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,157 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673621015] [2019-11-07 00:39:33,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:33,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673621015] [2019-11-07 00:39:33,316 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,316 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:33,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506281249] [2019-11-07 00:39:33,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:33,319 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:33,320 INFO L87 Difference]: Start difference. First operand 612 states and 964 transitions. Second operand 4 states. [2019-11-07 00:39:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,416 INFO L93 Difference]: Finished difference Result 1191 states and 1889 transitions. [2019-11-07 00:39:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:33,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-11-07 00:39:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,423 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:39:33,423 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:33,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:39:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:39:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 963 transitions. [2019-11-07 00:39:33,481 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 963 transitions. Word has length 88 [2019-11-07 00:39:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,485 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 963 transitions. [2019-11-07 00:39:33,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 963 transitions. [2019-11-07 00:39:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-07 00:39:33,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,493 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:33,493 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1257668075, now seen corresponding path program 1 times [2019-11-07 00:39:33,494 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163915833] [2019-11-07 00:39:33,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:33,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163915833] [2019-11-07 00:39:33,743 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,743 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:33,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919798870] [2019-11-07 00:39:33,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:33,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:33,746 INFO L87 Difference]: Start difference. First operand 612 states and 963 transitions. Second operand 4 states. [2019-11-07 00:39:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,830 INFO L93 Difference]: Finished difference Result 1191 states and 1888 transitions. [2019-11-07 00:39:33,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:33,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-11-07 00:39:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,836 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:39:33,836 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:33,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:39:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:39:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 962 transitions. [2019-11-07 00:39:33,869 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 962 transitions. Word has length 89 [2019-11-07 00:39:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,870 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 962 transitions. [2019-11-07 00:39:33,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 962 transitions. [2019-11-07 00:39:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-07 00:39:33,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,872 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:33,873 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash -69933471, now seen corresponding path program 1 times [2019-11-07 00:39:33,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340183623] [2019-11-07 00:39:33,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:33,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340183623] [2019-11-07 00:39:33,975 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,975 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:33,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187177426] [2019-11-07 00:39:33,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:33,976 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:33,977 INFO L87 Difference]: Start difference. First operand 612 states and 962 transitions. Second operand 4 states. [2019-11-07 00:39:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,038 INFO L93 Difference]: Finished difference Result 1191 states and 1887 transitions. [2019-11-07 00:39:34,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:34,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-11-07 00:39:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,043 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:39:34,044 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:34,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:34,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:39:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:39:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 961 transitions. [2019-11-07 00:39:34,079 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 961 transitions. Word has length 90 [2019-11-07 00:39:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,079 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 961 transitions. [2019-11-07 00:39:34,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 961 transitions. [2019-11-07 00:39:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 00:39:34,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,082 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:34,082 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1501218543, now seen corresponding path program 1 times [2019-11-07 00:39:34,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695415845] [2019-11-07 00:39:34,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:34,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695415845] [2019-11-07 00:39:34,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:34,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:34,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428779552] [2019-11-07 00:39:34,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:34,224 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:34,225 INFO L87 Difference]: Start difference. First operand 612 states and 961 transitions. Second operand 4 states. [2019-11-07 00:39:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,301 INFO L93 Difference]: Finished difference Result 1191 states and 1886 transitions. [2019-11-07 00:39:34,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:34,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-11-07 00:39:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,307 INFO L225 Difference]: With dead ends: 1191 [2019-11-07 00:39:34,307 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:39:34,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:39:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:39:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:39:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 960 transitions. [2019-11-07 00:39:34,390 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 960 transitions. Word has length 91 [2019-11-07 00:39:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,391 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 960 transitions. [2019-11-07 00:39:34,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 960 transitions. [2019-11-07 00:39:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 00:39:34,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,394 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:34,395 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1777232349, now seen corresponding path program 1 times [2019-11-07 00:39:34,395 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816533163] [2019-11-07 00:39:34,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:34,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816533163] [2019-11-07 00:39:34,620 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:34,620 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:34,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394814716] [2019-11-07 00:39:34,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:34,628 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:34,628 INFO L87 Difference]: Start difference. First operand 612 states and 960 transitions. Second operand 10 states. [2019-11-07 00:39:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,825 INFO L93 Difference]: Finished difference Result 1196 states and 1893 transitions. [2019-11-07 00:39:34,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:34,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2019-11-07 00:39:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,837 INFO L225 Difference]: With dead ends: 1196 [2019-11-07 00:39:34,837 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:39:34,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:39:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 619. [2019-11-07 00:39:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-11-07 00:39:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 970 transitions. [2019-11-07 00:39:34,876 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 970 transitions. Word has length 92 [2019-11-07 00:39:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,878 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 970 transitions. [2019-11-07 00:39:34,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 970 transitions. [2019-11-07 00:39:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 00:39:34,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,881 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:34,882 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1878144316, now seen corresponding path program 1 times [2019-11-07 00:39:34,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406598035] [2019-11-07 00:39:34,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:35,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406598035] [2019-11-07 00:39:35,033 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:35,033 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:35,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544814618] [2019-11-07 00:39:35,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:35,034 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:35,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:35,035 INFO L87 Difference]: Start difference. First operand 619 states and 970 transitions. Second operand 4 states. [2019-11-07 00:39:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,119 INFO L93 Difference]: Finished difference Result 1197 states and 1894 transitions. [2019-11-07 00:39:35,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:35,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-11-07 00:39:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,127 INFO L225 Difference]: With dead ends: 1197 [2019-11-07 00:39:35,127 INFO L226 Difference]: Without dead ends: 615 [2019-11-07 00:39:35,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-11-07 00:39:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-11-07 00:39:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-11-07 00:39:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 963 transitions. [2019-11-07 00:39:35,167 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 963 transitions. Word has length 92 [2019-11-07 00:39:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,168 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 963 transitions. [2019-11-07 00:39:35,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 963 transitions. [2019-11-07 00:39:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 00:39:35,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,171 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:35,172 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1995337811, now seen corresponding path program 1 times [2019-11-07 00:39:35,172 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758224377] [2019-11-07 00:39:35,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:35,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758224377] [2019-11-07 00:39:35,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:35,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:35,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497636499] [2019-11-07 00:39:35,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:35,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:35,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:35,397 INFO L87 Difference]: Start difference. First operand 615 states and 963 transitions. Second operand 6 states. [2019-11-07 00:39:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,684 INFO L93 Difference]: Finished difference Result 1210 states and 1918 transitions. [2019-11-07 00:39:35,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:35,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-11-07 00:39:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,690 INFO L225 Difference]: With dead ends: 1210 [2019-11-07 00:39:35,691 INFO L226 Difference]: Without dead ends: 623 [2019-11-07 00:39:35,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-11-07 00:39:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-11-07 00:39:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:39:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 964 transitions. [2019-11-07 00:39:35,726 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 964 transitions. Word has length 93 [2019-11-07 00:39:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,727 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 964 transitions. [2019-11-07 00:39:35,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 964 transitions. [2019-11-07 00:39:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:39:35,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,730 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:35,730 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1824175936, now seen corresponding path program 1 times [2019-11-07 00:39:35,731 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,731 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693325729] [2019-11-07 00:39:35,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:35,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693325729] [2019-11-07 00:39:35,877 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:35,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:35,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239084183] [2019-11-07 00:39:35,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:35,879 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:35,881 INFO L87 Difference]: Start difference. First operand 620 states and 964 transitions. Second operand 6 states. [2019-11-07 00:39:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,109 INFO L93 Difference]: Finished difference Result 1173 states and 1833 transitions. [2019-11-07 00:39:36,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:36,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-11-07 00:39:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,115 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:39:36,115 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:39:36,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:39:36,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:39:36,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:39:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 960 transitions. [2019-11-07 00:39:36,147 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 960 transitions. Word has length 94 [2019-11-07 00:39:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,148 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 960 transitions. [2019-11-07 00:39:36,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 960 transitions. [2019-11-07 00:39:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:39:36,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,152 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:36,152 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1850857070, now seen corresponding path program 1 times [2019-11-07 00:39:36,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985217285] [2019-11-07 00:39:36,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:36,333 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985217285] [2019-11-07 00:39:36,333 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:36,333 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:36,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818604212] [2019-11-07 00:39:36,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:36,334 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:36,335 INFO L87 Difference]: Start difference. First operand 620 states and 960 transitions. Second operand 6 states. [2019-11-07 00:39:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,637 INFO L93 Difference]: Finished difference Result 1173 states and 1829 transitions. [2019-11-07 00:39:36,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:36,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-11-07 00:39:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,644 INFO L225 Difference]: With dead ends: 1173 [2019-11-07 00:39:36,644 INFO L226 Difference]: Without dead ends: 620 [2019-11-07 00:39:36,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-07 00:39:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 620. [2019-11-07 00:39:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:39:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 956 transitions. [2019-11-07 00:39:36,681 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 956 transitions. Word has length 95 [2019-11-07 00:39:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,681 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 956 transitions. [2019-11-07 00:39:36,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 956 transitions. [2019-11-07 00:39:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:39:36,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,683 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:36,684 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1548805650, now seen corresponding path program 1 times [2019-11-07 00:39:36,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555478732] [2019-11-07 00:39:36,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:36,806 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555478732] [2019-11-07 00:39:36,806 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:36,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:36,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589543720] [2019-11-07 00:39:36,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:36,808 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:36,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:36,808 INFO L87 Difference]: Start difference. First operand 620 states and 956 transitions. Second operand 7 states. [2019-11-07 00:39:36,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,912 INFO L93 Difference]: Finished difference Result 1176 states and 1829 transitions. [2019-11-07 00:39:36,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:36,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-11-07 00:39:36,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,917 INFO L225 Difference]: With dead ends: 1176 [2019-11-07 00:39:36,917 INFO L226 Difference]: Without dead ends: 602 [2019-11-07 00:39:36,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-11-07 00:39:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 599. [2019-11-07 00:39:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:39:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 919 transitions. [2019-11-07 00:39:36,940 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 919 transitions. Word has length 95 [2019-11-07 00:39:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,940 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 919 transitions. [2019-11-07 00:39:36,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 919 transitions. [2019-11-07 00:39:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:39:36,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,942 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:36,942 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash 579263109, now seen corresponding path program 1 times [2019-11-07 00:39:36,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867842593] [2019-11-07 00:39:36,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:37,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867842593] [2019-11-07 00:39:37,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:37,047 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:37,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372527898] [2019-11-07 00:39:37,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:37,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:37,049 INFO L87 Difference]: Start difference. First operand 599 states and 919 transitions. Second operand 6 states. [2019-11-07 00:39:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:37,194 INFO L93 Difference]: Finished difference Result 1152 states and 1788 transitions. [2019-11-07 00:39:37,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:37,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-11-07 00:39:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:37,201 INFO L225 Difference]: With dead ends: 1152 [2019-11-07 00:39:37,201 INFO L226 Difference]: Without dead ends: 599 [2019-11-07 00:39:37,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-07 00:39:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-11-07 00:39:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:39:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 918 transitions. [2019-11-07 00:39:37,232 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 918 transitions. Word has length 96 [2019-11-07 00:39:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:37,232 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 918 transitions. [2019-11-07 00:39:37,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 918 transitions. [2019-11-07 00:39:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-07 00:39:37,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:37,235 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:37,236 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1860812663, now seen corresponding path program 1 times [2019-11-07 00:39:37,237 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:37,237 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007677065] [2019-11-07 00:39:37,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:37,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007677065] [2019-11-07 00:39:37,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:37,431 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:37,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147365395] [2019-11-07 00:39:37,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:37,434 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:37,434 INFO L87 Difference]: Start difference. First operand 599 states and 918 transitions. Second operand 6 states. [2019-11-07 00:39:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:37,565 INFO L93 Difference]: Finished difference Result 1152 states and 1787 transitions. [2019-11-07 00:39:37,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:37,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-11-07 00:39:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:37,571 INFO L225 Difference]: With dead ends: 1152 [2019-11-07 00:39:37,571 INFO L226 Difference]: Without dead ends: 599 [2019-11-07 00:39:37,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2019-11-07 00:39:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2019-11-07 00:39:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-11-07 00:39:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 917 transitions. [2019-11-07 00:39:37,599 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 917 transitions. Word has length 97 [2019-11-07 00:39:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:37,600 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 917 transitions. [2019-11-07 00:39:37,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:37,601 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 917 transitions. [2019-11-07 00:39:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 00:39:37,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:37,602 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:37,602 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:37,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1896411210, now seen corresponding path program 1 times [2019-11-07 00:39:37,603 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:37,603 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644293072] [2019-11-07 00:39:37,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:37,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644293072] [2019-11-07 00:39:37,800 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:37,800 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:37,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45130868] [2019-11-07 00:39:37,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:37,801 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:37,802 INFO L87 Difference]: Start difference. First operand 599 states and 917 transitions. Second operand 12 states. [2019-11-07 00:39:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:38,063 INFO L93 Difference]: Finished difference Result 1158 states and 1797 transitions. [2019-11-07 00:39:38,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:38,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2019-11-07 00:39:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:38,069 INFO L225 Difference]: With dead ends: 1158 [2019-11-07 00:39:38,069 INFO L226 Difference]: Without dead ends: 606 [2019-11-07 00:39:38,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-11-07 00:39:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2019-11-07 00:39:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-11-07 00:39:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 923 transitions. [2019-11-07 00:39:38,097 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 923 transitions. Word has length 98 [2019-11-07 00:39:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:38,099 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 923 transitions. [2019-11-07 00:39:38,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 923 transitions. [2019-11-07 00:39:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 00:39:38,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:38,101 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 00:39:38,101 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1663995072, now seen corresponding path program 1 times [2019-11-07 00:39:38,102 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:38,102 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266841354] [2019-11-07 00:39:38,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:39:38,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266841354] [2019-11-07 00:39:38,213 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:38,213 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:39:38,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381590098] [2019-11-07 00:39:38,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:38,214 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:38,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:39:38,215 INFO L87 Difference]: Start difference. First operand 604 states and 923 transitions. Second operand 3 states. [2019-11-07 00:39:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:38,369 INFO L93 Difference]: Finished difference Result 1688 states and 2646 transitions. [2019-11-07 00:39:38,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:38,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-11-07 00:39:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:38,379 INFO L225 Difference]: With dead ends: 1688 [2019-11-07 00:39:38,379 INFO L226 Difference]: Without dead ends: 1137 [2019-11-07 00:39:38,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:39:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2019-11-07 00:39:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1065. [2019-11-07 00:39:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-07 00:39:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1661 transitions. [2019-11-07 00:39:38,445 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1661 transitions. Word has length 99 [2019-11-07 00:39:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:38,464 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1661 transitions. [2019-11-07 00:39:38,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1661 transitions. [2019-11-07 00:39:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 00:39:38,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:38,470 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:38,470 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:38,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2131650664, now seen corresponding path program 1 times [2019-11-07 00:39:38,471 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:38,471 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164009253] [2019-11-07 00:39:38,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:38,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164009253] [2019-11-07 00:39:38,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604844007] [2019-11-07 00:39:38,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:39:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 00:39:39,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:39,470 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:39,803 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:39,803 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-11-07 00:39:39,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905765098] [2019-11-07 00:39:39,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:39,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:39:39,805 INFO L87 Difference]: Start difference. First operand 1065 states and 1661 transitions. Second operand 6 states. [2019-11-07 00:39:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:40,562 INFO L93 Difference]: Finished difference Result 2685 states and 4196 transitions. [2019-11-07 00:39:40,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:40,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-11-07 00:39:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:40,579 INFO L225 Difference]: With dead ends: 2685 [2019-11-07 00:39:40,579 INFO L226 Difference]: Without dead ends: 1673 [2019-11-07 00:39:40,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 306 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:40,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2019-11-07 00:39:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1670. [2019-11-07 00:39:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2019-11-07 00:39:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2575 transitions. [2019-11-07 00:39:40,714 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2575 transitions. Word has length 157 [2019-11-07 00:39:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:40,715 INFO L462 AbstractCegarLoop]: Abstraction has 1670 states and 2575 transitions. [2019-11-07 00:39:40,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2575 transitions. [2019-11-07 00:39:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 00:39:40,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:40,724 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:40,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:40,941 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash -352606121, now seen corresponding path program 1 times [2019-11-07 00:39:40,942 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:40,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564954876] [2019-11-07 00:39:40,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:39:41,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564954876] [2019-11-07 00:39:41,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980065775] [2019-11-07 00:39:41,236 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 00:39:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:41,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:41,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:42,043 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:42,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:42,501 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-11-07 00:39:42,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089244688] [2019-11-07 00:39:42,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:42,503 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:42,504 INFO L87 Difference]: Start difference. First operand 1670 states and 2575 transitions. Second operand 5 states. [2019-11-07 00:39:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:43,853 INFO L93 Difference]: Finished difference Result 3319 states and 5295 transitions. [2019-11-07 00:39:43,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:43,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2019-11-07 00:39:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:43,870 INFO L225 Difference]: With dead ends: 3319 [2019-11-07 00:39:43,871 INFO L226 Difference]: Without dead ends: 1702 [2019-11-07 00:39:43,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:39:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2019-11-07 00:39:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1702. [2019-11-07 00:39:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1702 states. [2019-11-07 00:39:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2627 transitions. [2019-11-07 00:39:44,016 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2627 transitions. Word has length 158 [2019-11-07 00:39:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:44,017 INFO L462 AbstractCegarLoop]: Abstraction has 1702 states and 2627 transitions. [2019-11-07 00:39:44,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2627 transitions. [2019-11-07 00:39:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:39:44,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:44,030 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:44,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:44,241 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1773700941, now seen corresponding path program 1 times [2019-11-07 00:39:44,242 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:44,242 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427252732] [2019-11-07 00:39:44,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 00:39:44,493 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427252732] [2019-11-07 00:39:44,493 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:44,493 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:39:44,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297336116] [2019-11-07 00:39:44,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:44,496 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:44,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:44,497 INFO L87 Difference]: Start difference. First operand 1702 states and 2627 transitions. Second operand 5 states. [2019-11-07 00:39:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:48,083 INFO L93 Difference]: Finished difference Result 3841 states and 5946 transitions. [2019-11-07 00:39:48,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:48,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-07 00:39:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:48,100 INFO L225 Difference]: With dead ends: 3841 [2019-11-07 00:39:48,101 INFO L226 Difference]: Without dead ends: 2195 [2019-11-07 00:39:48,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2019-11-07 00:39:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 2115. [2019-11-07 00:39:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2115 states. [2019-11-07 00:39:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3248 transitions. [2019-11-07 00:39:48,222 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3248 transitions. Word has length 161 [2019-11-07 00:39:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:48,223 INFO L462 AbstractCegarLoop]: Abstraction has 2115 states and 3248 transitions. [2019-11-07 00:39:48,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3248 transitions. [2019-11-07 00:39:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:39:48,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:48,229 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:48,229 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1567326197, now seen corresponding path program 1 times [2019-11-07 00:39:48,230 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:48,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376843155] [2019-11-07 00:39:48,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:39:48,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376843155] [2019-11-07 00:39:48,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740150625] [2019-11-07 00:39:48,476 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 00:39:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:49,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:49,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:49,274 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:39:49,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:49,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:49,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971356033] [2019-11-07 00:39:49,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:49,651 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:49,651 INFO L87 Difference]: Start difference. First operand 2115 states and 3248 transitions. Second operand 5 states. [2019-11-07 00:39:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:50,689 INFO L93 Difference]: Finished difference Result 4225 states and 6712 transitions. [2019-11-07 00:39:50,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:50,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-07 00:39:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:50,708 INFO L225 Difference]: With dead ends: 4225 [2019-11-07 00:39:50,709 INFO L226 Difference]: Without dead ends: 2163 [2019-11-07 00:39:50,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2019-11-07 00:39:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2163. [2019-11-07 00:39:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2163 states. [2019-11-07 00:39:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3326 transitions. [2019-11-07 00:39:50,827 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3326 transitions. Word has length 161 [2019-11-07 00:39:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:50,827 INFO L462 AbstractCegarLoop]: Abstraction has 2163 states and 3326 transitions. [2019-11-07 00:39:50,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3326 transitions. [2019-11-07 00:39:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:50,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:50,834 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:51,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:51,044 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:51,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1359183901, now seen corresponding path program 1 times [2019-11-07 00:39:51,045 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:51,045 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725566221] [2019-11-07 00:39:51,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:51,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725566221] [2019-11-07 00:39:51,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368655949] [2019-11-07 00:39:51,332 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 00:39:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:51,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:51,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:51,957 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:39:52,374 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:52,375 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-11-07 00:39:52,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826077778] [2019-11-07 00:39:52,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:52,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:52,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:52,381 INFO L87 Difference]: Start difference. First operand 2163 states and 3326 transitions. Second operand 5 states. [2019-11-07 00:39:53,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:53,393 INFO L93 Difference]: Finished difference Result 4321 states and 6854 transitions. [2019-11-07 00:39:53,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:53,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2019-11-07 00:39:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:53,412 INFO L225 Difference]: With dead ends: 4321 [2019-11-07 00:39:53,412 INFO L226 Difference]: Without dead ends: 2211 [2019-11-07 00:39:53,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 328 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:39:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2019-11-07 00:39:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2211. [2019-11-07 00:39:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2019-11-07 00:39:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3404 transitions. [2019-11-07 00:39:53,562 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3404 transitions. Word has length 164 [2019-11-07 00:39:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:53,563 INFO L462 AbstractCegarLoop]: Abstraction has 2211 states and 3404 transitions. [2019-11-07 00:39:53,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3404 transitions. [2019-11-07 00:39:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:39:53,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:53,571 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:53,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:53,778 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 759073009, now seen corresponding path program 1 times [2019-11-07 00:39:53,779 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:53,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119905695] [2019-11-07 00:39:53,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:54,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119905695] [2019-11-07 00:39:54,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706367298] [2019-11-07 00:39:54,019 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 00:39:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:54,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:54,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:54,668 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:39:55,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:55,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 17 [2019-11-07 00:39:55,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956240272] [2019-11-07 00:39:55,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:55,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:55,185 INFO L87 Difference]: Start difference. First operand 2211 states and 3404 transitions. Second operand 5 states. [2019-11-07 00:39:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:56,297 INFO L93 Difference]: Finished difference Result 4417 states and 6996 transitions. [2019-11-07 00:39:56,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:56,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2019-11-07 00:39:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:56,366 INFO L225 Difference]: With dead ends: 4417 [2019-11-07 00:39:56,366 INFO L226 Difference]: Without dead ends: 2259 [2019-11-07 00:39:56,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 334 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:56,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2019-11-07 00:39:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2259. [2019-11-07 00:39:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2259 states. [2019-11-07 00:39:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3482 transitions. [2019-11-07 00:39:56,458 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3482 transitions. Word has length 167 [2019-11-07 00:39:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:56,459 INFO L462 AbstractCegarLoop]: Abstraction has 2259 states and 3482 transitions. [2019-11-07 00:39:56,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3482 transitions. [2019-11-07 00:39:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:39:56,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:56,465 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:39:56,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:56,672 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2093169185, now seen corresponding path program 1 times [2019-11-07 00:39:56,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:56,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166939486] [2019-11-07 00:39:56,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-07 00:39:56,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166939486] [2019-11-07 00:39:56,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698081699] [2019-11-07 00:39:56,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:39:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:57,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-07 00:39:57,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:57,656 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-07 00:39:57,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:57,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [11] total 18 [2019-11-07 00:39:57,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080819473] [2019-11-07 00:39:57,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:57,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:57,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:57,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:57,895 INFO L87 Difference]: Start difference. First operand 2259 states and 3482 transitions. Second operand 9 states.