java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:15,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:15,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:15,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:15,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:15,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:15,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:15,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:15,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:15,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:15,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:15,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:15,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:15,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:15,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:15,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:15,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:15,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:15,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:15,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:15,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:15,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:15,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:15,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:15,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:15,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:15,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:15,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:15,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:15,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:15,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:15,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:15,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:15,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:15,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:15,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:15,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:15,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:15,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:15,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:15,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:15,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:10:15,625 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:15,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:15,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:15,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:15,627 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:15,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:15,628 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:15,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:15,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:15,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:15,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:15,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:15,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:15,629 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:15,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:15,630 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:15,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:15,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:15,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:15,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:15,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:15,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:15,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:15,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:15,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:15,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:15,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:15,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:15,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:10:15,954 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:15,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:15,977 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:15,978 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:15,979 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:15,979 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-10-13 21:10:16,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/826adc8ca/82183b03807f4651808901da883adba9/FLAG87095f590 [2019-10-13 21:10:16,712 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:16,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-10-13 21:10:16,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/826adc8ca/82183b03807f4651808901da883adba9/FLAG87095f590 [2019-10-13 21:10:16,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/826adc8ca/82183b03807f4651808901da883adba9 [2019-10-13 21:10:16,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:16,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:16,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:16,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:16,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:16,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:16" (1/1) ... [2019-10-13 21:10:16,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c381ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:16, skipping insertion in model container [2019-10-13 21:10:16,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:16" (1/1) ... [2019-10-13 21:10:16,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:16,952 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:17,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:17,686 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:17,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:17,906 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:17,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17 WrapperNode [2019-10-13 21:10:17,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:17,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:17,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:17,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:17,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:17,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:17,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:17,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:18,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:18,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:18,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... [2019-10-13 21:10:18,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:18,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:18,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:18,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:18,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:18,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:18,202 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:18,202 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:18,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:18,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:18,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:18,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:18,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:18,204 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:18,206 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:18,207 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:18,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:18,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:18,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:10:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:18,211 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:10:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:18,212 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:18,213 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:18,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:18,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:18,215 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:18,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:18,215 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:10:18,215 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-13 21:10:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:18,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:18,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:18,227 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:18,227 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:18,227 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:18,228 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:18,228 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:18,228 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:18,228 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:10:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:10:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:18,233 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:10:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:18,246 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:10:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:10:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:20,498 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:20,498 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:20,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:20 BoogieIcfgContainer [2019-10-13 21:10:20,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:20,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:20,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:20,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:20,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:16" (1/3) ... [2019-10-13 21:10:20,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2392fc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:20, skipping insertion in model container [2019-10-13 21:10:20,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:17" (2/3) ... [2019-10-13 21:10:20,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2392fc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:20, skipping insertion in model container [2019-10-13 21:10:20,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:20" (3/3) ... [2019-10-13 21:10:20,513 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2019-10-13 21:10:20,524 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:20,542 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:20,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:20,607 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:20,607 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:20,607 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:20,607 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:20,607 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:20,608 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:20,608 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:20,608 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states. [2019-10-13 21:10:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:10:20,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:20,688 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:20,690 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:20,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2022384104, now seen corresponding path program 1 times [2019-10-13 21:10:20,709 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:20,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228374006] [2019-10-13 21:10:20,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:20,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:21,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228374006] [2019-10-13 21:10:21,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595858772] [2019-10-13 21:10:21,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:22,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 3170 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:10:22,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:22,188 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:22,353 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:22,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:10:22,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798098480] [2019-10-13 21:10:22,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:10:22,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:10:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:22,380 INFO L87 Difference]: Start difference. First operand 806 states. Second operand 2 states. [2019-10-13 21:10:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:22,458 INFO L93 Difference]: Finished difference Result 682 states and 1081 transitions. [2019-10-13 21:10:22,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:10:22,460 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 116 [2019-10-13 21:10:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:22,493 INFO L225 Difference]: With dead ends: 682 [2019-10-13 21:10:22,494 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:22,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1026 transitions. [2019-10-13 21:10:22,640 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1026 transitions. Word has length 116 [2019-10-13 21:10:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:22,646 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1026 transitions. [2019-10-13 21:10:22,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:10:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1026 transitions. [2019-10-13 21:10:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:10:22,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:22,664 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:22,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:22,872 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:22,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1798333227, now seen corresponding path program 1 times [2019-10-13 21:10:22,872 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:22,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385355661] [2019-10-13 21:10:22,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:22,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:23,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385355661] [2019-10-13 21:10:23,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270818751] [2019-10-13 21:10:23,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:23,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 3173 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:23,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:23,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:24,137 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:24,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:24,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026836874] [2019-10-13 21:10:24,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:24,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:24,143 INFO L87 Difference]: Start difference. First operand 645 states and 1026 transitions. Second operand 4 states. [2019-10-13 21:10:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:24,294 INFO L93 Difference]: Finished difference Result 1262 states and 2025 transitions. [2019-10-13 21:10:24,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:24,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:10:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:24,304 INFO L225 Difference]: With dead ends: 1262 [2019-10-13 21:10:24,304 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:24,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1025 transitions. [2019-10-13 21:10:24,344 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1025 transitions. Word has length 118 [2019-10-13 21:10:24,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:24,345 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1025 transitions. [2019-10-13 21:10:24,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1025 transitions. [2019-10-13 21:10:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 21:10:24,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:24,348 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:24,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:24,557 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:24,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2025770863, now seen corresponding path program 1 times [2019-10-13 21:10:24,558 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:24,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579607366] [2019-10-13 21:10:24,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:24,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:24,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579607366] [2019-10-13 21:10:24,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425328653] [2019-10-13 21:10:24,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:25,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:25,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:25,391 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:25,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:25,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:25,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158425116] [2019-10-13 21:10:25,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:25,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:25,583 INFO L87 Difference]: Start difference. First operand 645 states and 1025 transitions. Second operand 4 states. [2019-10-13 21:10:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:25,669 INFO L93 Difference]: Finished difference Result 1262 states and 2023 transitions. [2019-10-13 21:10:25,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:25,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2019-10-13 21:10:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:25,676 INFO L225 Difference]: With dead ends: 1262 [2019-10-13 21:10:25,677 INFO L226 Difference]: Without dead ends: 645 [2019-10-13 21:10:25,681 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-10-13 21:10:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2019-10-13 21:10:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 21:10:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1024 transitions. [2019-10-13 21:10:25,721 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1024 transitions. Word has length 120 [2019-10-13 21:10:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:25,722 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 1024 transitions. [2019-10-13 21:10:25,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1024 transitions. [2019-10-13 21:10:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:10:25,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:25,725 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:25,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:25,934 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:25,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1223604915, now seen corresponding path program 1 times [2019-10-13 21:10:25,935 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:25,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346008008] [2019-10-13 21:10:25,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:25,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:26,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346008008] [2019-10-13 21:10:26,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199351046] [2019-10-13 21:10:26,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:26,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:26,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:26,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:26,972 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:26,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:26,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831701382] [2019-10-13 21:10:26,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:26,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:26,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:26,974 INFO L87 Difference]: Start difference. First operand 645 states and 1024 transitions. Second operand 4 states. [2019-10-13 21:10:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:27,051 INFO L93 Difference]: Finished difference Result 1269 states and 2030 transitions. [2019-10-13 21:10:27,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:27,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-10-13 21:10:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:27,056 INFO L225 Difference]: With dead ends: 1269 [2019-10-13 21:10:27,056 INFO L226 Difference]: Without dead ends: 654 [2019-10-13 21:10:27,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-13 21:10:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-13 21:10:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-13 21:10:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1036 transitions. [2019-10-13 21:10:27,089 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1036 transitions. Word has length 122 [2019-10-13 21:10:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:27,090 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1036 transitions. [2019-10-13 21:10:27,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1036 transitions. [2019-10-13 21:10:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:10:27,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:27,097 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:27,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:27,310 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1957225257, now seen corresponding path program 1 times [2019-10-13 21:10:27,310 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:27,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981516956] [2019-10-13 21:10:27,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:27,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:27,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:27,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981516956] [2019-10-13 21:10:27,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018740702] [2019-10-13 21:10:27,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:28,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:28,090 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:28,282 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:28,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:28,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645768965] [2019-10-13 21:10:28,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:28,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:28,288 INFO L87 Difference]: Start difference. First operand 654 states and 1036 transitions. Second operand 4 states. [2019-10-13 21:10:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:28,408 INFO L93 Difference]: Finished difference Result 1271 states and 2031 transitions. [2019-10-13 21:10:28,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:28,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 21:10:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:28,429 INFO L225 Difference]: With dead ends: 1271 [2019-10-13 21:10:28,429 INFO L226 Difference]: Without dead ends: 654 [2019-10-13 21:10:28,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-13 21:10:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-13 21:10:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-13 21:10:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1035 transitions. [2019-10-13 21:10:28,543 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1035 transitions. Word has length 123 [2019-10-13 21:10:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:28,544 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1035 transitions. [2019-10-13 21:10:28,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1035 transitions. [2019-10-13 21:10:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 21:10:28,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:28,547 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:28,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:28,757 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash 974787383, now seen corresponding path program 1 times [2019-10-13 21:10:28,758 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:28,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856070416] [2019-10-13 21:10:28,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:28,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:28,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856070416] [2019-10-13 21:10:28,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194309164] [2019-10-13 21:10:28,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:29,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:29,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:29,520 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:29,713 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:29,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:29,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932975446] [2019-10-13 21:10:29,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:29,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:29,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:29,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:29,717 INFO L87 Difference]: Start difference. First operand 654 states and 1035 transitions. Second operand 4 states. [2019-10-13 21:10:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:29,805 INFO L93 Difference]: Finished difference Result 1271 states and 2030 transitions. [2019-10-13 21:10:29,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:29,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2019-10-13 21:10:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:29,812 INFO L225 Difference]: With dead ends: 1271 [2019-10-13 21:10:29,812 INFO L226 Difference]: Without dead ends: 654 [2019-10-13 21:10:29,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-13 21:10:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-13 21:10:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-13 21:10:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1034 transitions. [2019-10-13 21:10:29,845 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1034 transitions. Word has length 124 [2019-10-13 21:10:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:29,846 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1034 transitions. [2019-10-13 21:10:29,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1034 transitions. [2019-10-13 21:10:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:10:29,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:29,850 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:30,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:30,060 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash 131398875, now seen corresponding path program 1 times [2019-10-13 21:10:30,061 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:30,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010445518] [2019-10-13 21:10:30,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:30,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:30,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:30,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010445518] [2019-10-13 21:10:30,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280130193] [2019-10-13 21:10:30,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:30,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:30,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:30,918 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:31,149 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:31,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:31,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569259550] [2019-10-13 21:10:31,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:31,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:31,152 INFO L87 Difference]: Start difference. First operand 654 states and 1034 transitions. Second operand 4 states. [2019-10-13 21:10:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:31,367 INFO L93 Difference]: Finished difference Result 1270 states and 2030 transitions. [2019-10-13 21:10:31,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:31,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-13 21:10:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:31,375 INFO L225 Difference]: With dead ends: 1270 [2019-10-13 21:10:31,375 INFO L226 Difference]: Without dead ends: 654 [2019-10-13 21:10:31,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-13 21:10:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-13 21:10:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-13 21:10:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1029 transitions. [2019-10-13 21:10:31,411 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1029 transitions. Word has length 125 [2019-10-13 21:10:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:31,413 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1029 transitions. [2019-10-13 21:10:31,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1029 transitions. [2019-10-13 21:10:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:10:31,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:31,418 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:31,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:31,634 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2025700873, now seen corresponding path program 1 times [2019-10-13 21:10:31,635 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:31,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314666208] [2019-10-13 21:10:31,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:31,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:31,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314666208] [2019-10-13 21:10:31,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048795817] [2019-10-13 21:10:31,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:32,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:32,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:32,590 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:32,782 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:32,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:32,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430214163] [2019-10-13 21:10:32,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:32,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:32,785 INFO L87 Difference]: Start difference. First operand 654 states and 1029 transitions. Second operand 4 states. [2019-10-13 21:10:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:32,961 INFO L93 Difference]: Finished difference Result 1270 states and 2020 transitions. [2019-10-13 21:10:32,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:32,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-10-13 21:10:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:32,966 INFO L225 Difference]: With dead ends: 1270 [2019-10-13 21:10:32,967 INFO L226 Difference]: Without dead ends: 654 [2019-10-13 21:10:32,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-10-13 21:10:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-10-13 21:10:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-10-13 21:10:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1024 transitions. [2019-10-13 21:10:32,993 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1024 transitions. Word has length 127 [2019-10-13 21:10:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:32,993 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 1024 transitions. [2019-10-13 21:10:32,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1024 transitions. [2019-10-13 21:10:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 21:10:32,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:32,996 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:33,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:33,213 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:33,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1647818991, now seen corresponding path program 1 times [2019-10-13 21:10:33,214 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:33,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527328788] [2019-10-13 21:10:33,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:33,215 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:33,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:33,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527328788] [2019-10-13 21:10:33,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607169886] [2019-10-13 21:10:33,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:34,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:34,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:34,150 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:34,352 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:34,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:34,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055353669] [2019-10-13 21:10:34,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:34,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:34,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:34,354 INFO L87 Difference]: Start difference. First operand 654 states and 1024 transitions. Second operand 4 states. [2019-10-13 21:10:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:34,579 INFO L93 Difference]: Finished difference Result 1306 states and 2069 transitions. [2019-10-13 21:10:34,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:34,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 21:10:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:34,585 INFO L225 Difference]: With dead ends: 1306 [2019-10-13 21:10:34,585 INFO L226 Difference]: Without dead ends: 693 [2019-10-13 21:10:34,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-13 21:10:34,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-13 21:10:34,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-13 21:10:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1088 transitions. [2019-10-13 21:10:34,613 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1088 transitions. Word has length 129 [2019-10-13 21:10:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:34,613 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1088 transitions. [2019-10-13 21:10:34,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1088 transitions. [2019-10-13 21:10:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:34,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:34,616 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:34,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:34,832 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 999739231, now seen corresponding path program 1 times [2019-10-13 21:10:34,833 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:34,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980045576] [2019-10-13 21:10:34,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:34,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:34,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:35,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980045576] [2019-10-13 21:10:35,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841419365] [2019-10-13 21:10:35,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:35,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:35,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:35,699 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:36,022 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:36,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-13 21:10:36,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140253180] [2019-10-13 21:10:36,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:36,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:36,024 INFO L87 Difference]: Start difference. First operand 693 states and 1088 transitions. Second operand 4 states. [2019-10-13 21:10:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:36,255 INFO L93 Difference]: Finished difference Result 1309 states and 2072 transitions. [2019-10-13 21:10:36,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:36,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 21:10:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:36,262 INFO L225 Difference]: With dead ends: 1309 [2019-10-13 21:10:36,263 INFO L226 Difference]: Without dead ends: 693 [2019-10-13 21:10:36,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-10-13 21:10:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-10-13 21:10:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-10-13 21:10:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1083 transitions. [2019-10-13 21:10:36,300 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1083 transitions. Word has length 130 [2019-10-13 21:10:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:36,301 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1083 transitions. [2019-10-13 21:10:36,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1083 transitions. [2019-10-13 21:10:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:36,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:36,304 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:36,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:36,514 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1612034594, now seen corresponding path program 1 times [2019-10-13 21:10:36,515 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:36,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866812458] [2019-10-13 21:10:36,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:36,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:36,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:36,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866812458] [2019-10-13 21:10:36,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640007473] [2019-10-13 21:10:36,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:37,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:37,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:37,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:37,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:37,889 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:37,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:37,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701344885] [2019-10-13 21:10:37,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:37,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:37,891 INFO L87 Difference]: Start difference. First operand 693 states and 1083 transitions. Second operand 9 states. [2019-10-13 21:10:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:38,136 INFO L93 Difference]: Finished difference Result 1322 states and 2086 transitions. [2019-10-13 21:10:38,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:38,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 130 [2019-10-13 21:10:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:38,142 INFO L225 Difference]: With dead ends: 1322 [2019-10-13 21:10:38,142 INFO L226 Difference]: Without dead ends: 709 [2019-10-13 21:10:38,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 245 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-13 21:10:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 702. [2019-10-13 21:10:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2019-10-13 21:10:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1096 transitions. [2019-10-13 21:10:38,171 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1096 transitions. Word has length 130 [2019-10-13 21:10:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:38,171 INFO L462 AbstractCegarLoop]: Abstraction has 702 states and 1096 transitions. [2019-10-13 21:10:38,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1096 transitions. [2019-10-13 21:10:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 21:10:38,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:38,174 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:38,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:38,383 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1873445245, now seen corresponding path program 1 times [2019-10-13 21:10:38,384 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:38,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095168554] [2019-10-13 21:10:38,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:38,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:38,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:38,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095168554] [2019-10-13 21:10:38,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40240210] [2019-10-13 21:10:38,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:39,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:39,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:39,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:39,625 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:39,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:39,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214751457] [2019-10-13 21:10:39,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:39,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:39,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:39,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:39,627 INFO L87 Difference]: Start difference. First operand 702 states and 1096 transitions. Second operand 11 states. [2019-10-13 21:10:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:39,805 INFO L93 Difference]: Finished difference Result 1260 states and 1988 transitions. [2019-10-13 21:10:39,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:39,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 130 [2019-10-13 21:10:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:39,812 INFO L225 Difference]: With dead ends: 1260 [2019-10-13 21:10:39,813 INFO L226 Difference]: Without dead ends: 719 [2019-10-13 21:10:39,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2019-10-13 21:10:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 709. [2019-10-13 21:10:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2019-10-13 21:10:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1106 transitions. [2019-10-13 21:10:39,844 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1106 transitions. Word has length 130 [2019-10-13 21:10:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:39,844 INFO L462 AbstractCegarLoop]: Abstraction has 709 states and 1106 transitions. [2019-10-13 21:10:39,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1106 transitions. [2019-10-13 21:10:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:39,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:39,847 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:40,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:40,058 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:40,058 INFO L82 PathProgramCache]: Analyzing trace with hash -892585654, now seen corresponding path program 1 times [2019-10-13 21:10:40,058 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:40,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123672299] [2019-10-13 21:10:40,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:40,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:40,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123672299] [2019-10-13 21:10:40,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201959155] [2019-10-13 21:10:40,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:40,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 3181 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:40,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:41,017 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:41,191 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-13 21:10:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:10:41,408 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:41,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-13 21:10:41,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469231842] [2019-10-13 21:10:41,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:41,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:41,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:41,411 INFO L87 Difference]: Start difference. First operand 709 states and 1106 transitions. Second operand 8 states. [2019-10-13 21:10:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:41,543 INFO L93 Difference]: Finished difference Result 1264 states and 1997 transitions. [2019-10-13 21:10:41,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:41,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-13 21:10:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:41,553 INFO L225 Difference]: With dead ends: 1264 [2019-10-13 21:10:41,553 INFO L226 Difference]: Without dead ends: 723 [2019-10-13 21:10:41,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2019-10-13 21:10:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 716. [2019-10-13 21:10:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-13 21:10:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1117 transitions. [2019-10-13 21:10:41,591 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1117 transitions. Word has length 131 [2019-10-13 21:10:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:41,591 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1117 transitions. [2019-10-13 21:10:41,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1117 transitions. [2019-10-13 21:10:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 21:10:41,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:41,594 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:41,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:41,803 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1417743562, now seen corresponding path program 1 times [2019-10-13 21:10:41,804 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:41,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72897282] [2019-10-13 21:10:41,805 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:41,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:41,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:41,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72897282] [2019-10-13 21:10:41,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383149694] [2019-10-13 21:10:41,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:42,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 3177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:42,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:42,693 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:43,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:43,167 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:43,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:10:43,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599710221] [2019-10-13 21:10:43,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:10:43,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:10:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:43,171 INFO L87 Difference]: Start difference. First operand 716 states and 1117 transitions. Second operand 14 states. [2019-10-13 21:10:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:43,428 INFO L93 Difference]: Finished difference Result 1265 states and 1997 transitions. [2019-10-13 21:10:43,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:10:43,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 131 [2019-10-13 21:10:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:43,434 INFO L225 Difference]: With dead ends: 1265 [2019-10-13 21:10:43,434 INFO L226 Difference]: Without dead ends: 724 [2019-10-13 21:10:43,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2019-10-13 21:10:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 716. [2019-10-13 21:10:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-13 21:10:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1117 transitions. [2019-10-13 21:10:43,467 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1117 transitions. Word has length 131 [2019-10-13 21:10:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:43,467 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1117 transitions. [2019-10-13 21:10:43,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:10:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1117 transitions. [2019-10-13 21:10:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:43,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:43,470 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:43,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:43,678 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1260335984, now seen corresponding path program 1 times [2019-10-13 21:10:43,679 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:43,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067443972] [2019-10-13 21:10:43,679 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:43,679 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:43,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:43,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067443972] [2019-10-13 21:10:43,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783017328] [2019-10-13 21:10:43,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:44,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:44,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:44,629 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:10:44,813 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:44,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:44,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877070385] [2019-10-13 21:10:44,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:44,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:44,814 INFO L87 Difference]: Start difference. First operand 716 states and 1117 transitions. Second operand 4 states. [2019-10-13 21:10:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:45,023 INFO L93 Difference]: Finished difference Result 1351 states and 2131 transitions. [2019-10-13 21:10:45,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:45,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-13 21:10:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:45,031 INFO L225 Difference]: With dead ends: 1351 [2019-10-13 21:10:45,031 INFO L226 Difference]: Without dead ends: 716 [2019-10-13 21:10:45,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2019-10-13 21:10:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2019-10-13 21:10:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2019-10-13 21:10:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1112 transitions. [2019-10-13 21:10:45,066 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1112 transitions. Word has length 133 [2019-10-13 21:10:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:45,067 INFO L462 AbstractCegarLoop]: Abstraction has 716 states and 1112 transitions. [2019-10-13 21:10:45,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1112 transitions. [2019-10-13 21:10:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 21:10:45,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:45,070 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:45,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:45,286 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:45,287 INFO L82 PathProgramCache]: Analyzing trace with hash 399075328, now seen corresponding path program 1 times [2019-10-13 21:10:45,287 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:45,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724672709] [2019-10-13 21:10:45,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:45,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:45,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724672709] [2019-10-13 21:10:45,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746159416] [2019-10-13 21:10:45,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:46,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:46,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:46,208 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:46,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:10:46,634 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:46,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:10:46,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961894416] [2019-10-13 21:10:46,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:46,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:46,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:46,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:46,636 INFO L87 Difference]: Start difference. First operand 716 states and 1112 transitions. Second operand 11 states. [2019-10-13 21:10:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:46,924 INFO L93 Difference]: Finished difference Result 1266 states and 2000 transitions. [2019-10-13 21:10:46,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:46,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-13 21:10:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:46,930 INFO L225 Difference]: With dead ends: 1266 [2019-10-13 21:10:46,930 INFO L226 Difference]: Without dead ends: 725 [2019-10-13 21:10:46,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:10:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-10-13 21:10:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 718. [2019-10-13 21:10:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2019-10-13 21:10:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1118 transitions. [2019-10-13 21:10:46,966 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1118 transitions. Word has length 132 [2019-10-13 21:10:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:46,966 INFO L462 AbstractCegarLoop]: Abstraction has 718 states and 1118 transitions. [2019-10-13 21:10:46,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1118 transitions. [2019-10-13 21:10:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:10:46,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:46,969 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:47,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:47,178 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1558329253, now seen corresponding path program 1 times [2019-10-13 21:10:47,179 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:47,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482710682] [2019-10-13 21:10:47,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,179 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:47,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:10:47,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482710682] [2019-10-13 21:10:47,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20459849] [2019-10-13 21:10:47,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:48,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 3179 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:48,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:48,067 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:48,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:48,354 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:48,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-13 21:10:48,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553415823] [2019-10-13 21:10:48,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:48,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:48,355 INFO L87 Difference]: Start difference. First operand 718 states and 1118 transitions. Second operand 9 states. [2019-10-13 21:10:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:48,480 INFO L93 Difference]: Finished difference Result 1362 states and 2165 transitions. [2019-10-13 21:10:48,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:48,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2019-10-13 21:10:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:48,485 INFO L225 Difference]: With dead ends: 1362 [2019-10-13 21:10:48,486 INFO L226 Difference]: Without dead ends: 727 [2019-10-13 21:10:48,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2019-10-13 21:10:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 725. [2019-10-13 21:10:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-13 21:10:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1126 transitions. [2019-10-13 21:10:48,516 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1126 transitions. Word has length 133 [2019-10-13 21:10:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:48,516 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 1126 transitions. [2019-10-13 21:10:48,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1126 transitions. [2019-10-13 21:10:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:10:48,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:48,520 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:48,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:48,730 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:48,730 INFO L82 PathProgramCache]: Analyzing trace with hash 266659145, now seen corresponding path program 1 times [2019-10-13 21:10:48,731 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:48,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103620487] [2019-10-13 21:10:48,731 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:48,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:48,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:48,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103620487] [2019-10-13 21:10:48,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714960570] [2019-10-13 21:10:48,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:49,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:10:49,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:49,561 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:49,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:10:49,951 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:49,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-13 21:10:49,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17397368] [2019-10-13 21:10:49,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:10:49,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:10:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:49,953 INFO L87 Difference]: Start difference. First operand 725 states and 1126 transitions. Second operand 8 states. [2019-10-13 21:10:50,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:50,061 INFO L93 Difference]: Finished difference Result 1376 states and 2176 transitions. [2019-10-13 21:10:50,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:50,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 136 [2019-10-13 21:10:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:50,067 INFO L225 Difference]: With dead ends: 1376 [2019-10-13 21:10:50,068 INFO L226 Difference]: Without dead ends: 734 [2019-10-13 21:10:50,071 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:10:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-10-13 21:10:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 729. [2019-10-13 21:10:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2019-10-13 21:10:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1132 transitions. [2019-10-13 21:10:50,098 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1132 transitions. Word has length 136 [2019-10-13 21:10:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:50,098 INFO L462 AbstractCegarLoop]: Abstraction has 729 states and 1132 transitions. [2019-10-13 21:10:50,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:10:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1132 transitions. [2019-10-13 21:10:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:10:50,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:50,101 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:10:50,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:50,318 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:50,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:50,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1900496898, now seen corresponding path program 1 times [2019-10-13 21:10:50,318 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:50,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785895489] [2019-10-13 21:10:50,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:50,318 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:50,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:10:50,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785895489] [2019-10-13 21:10:50,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911614142] [2019-10-13 21:10:50,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:51,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:10:51,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 21:10:51,224 INFO L321 TraceCheckSpWp]: Computing backward predicates...