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_productSimulator.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:09:21,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:09:21,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:09:21,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:09:21,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:09:21,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:09:21,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:09:21,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:09:21,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:09:21,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:09:21,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:09:21,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:09:21,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:09:21,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:09:21,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:09:21,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:09:21,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:09:21,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:09:21,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:09:21,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:09:21,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:09:21,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:09:21,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:09:21,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:09:21,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:09:21,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:09:21,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:09:21,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:09:21,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:09:21,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:09:21,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:09:21,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:09:21,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:09:21,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:09:21,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:09:21,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:09:21,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:09:21,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:09:21,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:09:21,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:09:21,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:09:21,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:09:21,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:09:21,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:09:21,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:09:21,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:09:21,500 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:09:21,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:09:21,501 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:09:21,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:09:21,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:09:21,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:09:21,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:09:21,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:09:21,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:09:21,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:09:21,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:09:21,502 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:09:21,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:09:21,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:09:21,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:09:21,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:09:21,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:09:21,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:21,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:09:21,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:09:21,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:09:21,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:09:21,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:09:21,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:09:21,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:09:21,767 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:09:21,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:09:21,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:09:21,793 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:09:21,794 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:09:21,794 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_productSimulator.cil.c [2019-10-15 01:09:21,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/256455994/a83f98c3eddc4982a6319d0c91a28c23/FLAG2a65f175c [2019-10-15 01:09:22,514 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:09:22,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_productSimulator.cil.c [2019-10-15 01:09:22,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/256455994/a83f98c3eddc4982a6319d0c91a28c23/FLAG2a65f175c [2019-10-15 01:09:22,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/256455994/a83f98c3eddc4982a6319d0c91a28c23 [2019-10-15 01:09:22,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:09:22,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:09:22,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:22,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:09:22,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:09:22,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:22,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599a6431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:22, skipping insertion in model container [2019-10-15 01:09:22,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:09:22" (1/1) ... [2019-10-15 01:09:22,698 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:09:22,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:09:23,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:23,523 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:09:23,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:09:23,801 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:09:23,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23 WrapperNode [2019-10-15 01:09:23,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:09:23,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:09:23,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:09:23,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:09:23,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:23,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... [2019-10-15 01:09:24,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:09:24,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:09:24,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:09:24,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:09:24,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:09:24,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:09:24,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:09:24,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:24,100 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:09:24,100 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:09:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:09:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:09:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:24,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:09:24,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:09:24,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:09:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:09:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:09:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:24,106 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:09:24,107 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:09:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:09:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:09:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:09:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:09:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:09:24,108 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:09:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:09:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:09:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked__before__overloaded [2019-10-15 01:09:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked__role__overloaded [2019-10-15 01:09:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:09:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__before__weight [2019-10-15 01:09:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__role__weight [2019-10-15 01:09:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:09:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__weight [2019-10-15 01:09:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__role__weight [2019-10-15 01:09:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__before__empty [2019-10-15 01:09:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__role__empty [2019-10-15 01:09:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:09:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:09:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:09:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__twothirdsfull [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__role__twothirdsfull [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__before__executivefloor [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__role__executivefloor [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:09:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:09:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2019-10-15 01:09:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__role__twothirdsfull [2019-10-15 01:09:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__before__executivefloor [2019-10-15 01:09:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__role__executivefloor [2019-10-15 01:09:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:09:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:09:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__before__overloaded [2019-10-15 01:09:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__role__overloaded [2019-10-15 01:09:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__before__overloaded [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__role__overloaded [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:09:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:09:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:09:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:09:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:09:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:09:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:09:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:09:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:09:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:09:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:09:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:09:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:09:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:09:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:09:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:09:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:09:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:09:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:09:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:09:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:09:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:09:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:09:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:09:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:09:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:09:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:09:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:09:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:09:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:09:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:09:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:09:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:09:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:09:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:09:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:09:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:09:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:09:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:09:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:09:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:09:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:09:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:09:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:09:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:09:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:09:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:09:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:09:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:09:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:09:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:09:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:09:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:09:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:09:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:09:24,133 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:09:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:09:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:09:24,134 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:09:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:09:24,135 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:09:24,142 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:09:24,142 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:09:24,142 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:09:24,142 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:09:24,142 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:09:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:09:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:09:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked__before__overloaded [2019-10-15 01:09:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked__role__overloaded [2019-10-15 01:09:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__before__weight [2019-10-15 01:09:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__role__weight [2019-10-15 01:09:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__weight [2019-10-15 01:09:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__role__weight [2019-10-15 01:09:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__before__empty [2019-10-15 01:09:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__role__empty [2019-10-15 01:09:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:09:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:09:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:09:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:09:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:09:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__twothirdsfull [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__role__twothirdsfull [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__before__executivefloor [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__role__executivefloor [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__twothirdsfull [2019-10-15 01:09:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__role__twothirdsfull [2019-10-15 01:09:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__before__executivefloor [2019-10-15 01:09:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__role__executivefloor [2019-10-15 01:09:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:09:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:09:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:09:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__before__overloaded [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__role__overloaded [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure printState__before__overloaded [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure printState__role__overloaded [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:09:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:09:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:09:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:09:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:09:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:09:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:09:24,149 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:09:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:09:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:09:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:09:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:09:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:09:24,150 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:09:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:09:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:09:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:09:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:09:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:09:24,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:09:26,938 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:09:26,939 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:09:26,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:26 BoogieIcfgContainer [2019-10-15 01:09:26,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:09:26,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:09:26,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:09:26,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:09:26,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:09:22" (1/3) ... [2019-10-15 01:09:26,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7c7755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:26, skipping insertion in model container [2019-10-15 01:09:26,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:09:23" (2/3) ... [2019-10-15 01:09:26,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e7c7755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:09:26, skipping insertion in model container [2019-10-15 01:09:26,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:09:26" (3/3) ... [2019-10-15 01:09:26,949 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_productSimulator.cil.c [2019-10-15 01:09:26,959 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:09:26,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:09:26,982 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:09:27,029 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:09:27,029 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:09:27,029 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:09:27,030 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:09:27,030 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:09:27,030 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:09:27,030 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:09:27,030 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:09:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states. [2019-10-15 01:09:27,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:09:27,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:27,169 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:27,172 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1052026056, now seen corresponding path program 1 times [2019-10-15 01:09:27,188 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:27,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194842271] [2019-10-15 01:09:27,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:27,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:27,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 01:09:27,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194842271] [2019-10-15 01:09:27,966 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:09:27,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:09:27,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364330439] [2019-10-15 01:09:27,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:09:27,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:09:27,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:09:27,994 INFO L87 Difference]: Start difference. First operand 927 states. Second operand 6 states. [2019-10-15 01:09:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:28,254 INFO L93 Difference]: Finished difference Result 1511 states and 2355 transitions. [2019-10-15 01:09:28,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:28,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-15 01:09:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:28,301 INFO L225 Difference]: With dead ends: 1511 [2019-10-15 01:09:28,301 INFO L226 Difference]: Without dead ends: 761 [2019-10-15 01:09:28,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2019-10-15 01:09:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2019-10-15 01:09:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-10-15 01:09:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1174 transitions. [2019-10-15 01:09:28,460 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1174 transitions. Word has length 150 [2019-10-15 01:09:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:28,472 INFO L462 AbstractCegarLoop]: Abstraction has 761 states and 1174 transitions. [2019-10-15 01:09:28,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:09:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1174 transitions. [2019-10-15 01:09:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:09:28,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:28,488 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:28,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash 716196849, now seen corresponding path program 1 times [2019-10-15 01:09:28,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:28,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405160543] [2019-10-15 01:09:28,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:28,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:28,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405160543] [2019-10-15 01:09:28,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58299127] [2019-10-15 01:09:28,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:29,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:29,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 01:09:29,716 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 01:09:29,997 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:29,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [4] total 6 [2019-10-15 01:09:29,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549785750] [2019-10-15 01:09:30,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:30,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:09:30,003 INFO L87 Difference]: Start difference. First operand 761 states and 1174 transitions. Second operand 4 states. [2019-10-15 01:09:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:31,301 INFO L93 Difference]: Finished difference Result 2099 states and 3273 transitions. [2019-10-15 01:09:31,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:31,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-15 01:09:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:31,313 INFO L225 Difference]: With dead ends: 2099 [2019-10-15 01:09:31,313 INFO L226 Difference]: Without dead ends: 1468 [2019-10-15 01:09:31,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:09:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2019-10-15 01:09:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1455. [2019-10-15 01:09:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2019-10-15 01:09:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2261 transitions. [2019-10-15 01:09:31,383 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2261 transitions. Word has length 153 [2019-10-15 01:09:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:31,384 INFO L462 AbstractCegarLoop]: Abstraction has 1455 states and 2261 transitions. [2019-10-15 01:09:31,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2261 transitions. [2019-10-15 01:09:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:09:31,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:31,389 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:31,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:31,598 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1946856055, now seen corresponding path program 1 times [2019-10-15 01:09:31,599 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:31,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476399645] [2019-10-15 01:09:31,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:31,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:31,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476399645] [2019-10-15 01:09:31,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252116956] [2019-10-15 01:09:31,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:32,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 3583 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:32,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:32,521 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:32,826 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:32,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:32,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368822608] [2019-10-15 01:09:32,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:32,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:32,828 INFO L87 Difference]: Start difference. First operand 1455 states and 2261 transitions. Second operand 4 states. [2019-10-15 01:09:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:32,932 INFO L93 Difference]: Finished difference Result 2843 states and 4450 transitions. [2019-10-15 01:09:32,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:32,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-15 01:09:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:32,944 INFO L225 Difference]: With dead ends: 2843 [2019-10-15 01:09:32,944 INFO L226 Difference]: Without dead ends: 1455 [2019-10-15 01:09:32,950 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2019-10-15 01:09:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2019-10-15 01:09:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2019-10-15 01:09:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2259 transitions. [2019-10-15 01:09:33,029 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2259 transitions. Word has length 154 [2019-10-15 01:09:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:33,031 INFO L462 AbstractCegarLoop]: Abstraction has 1455 states and 2259 transitions. [2019-10-15 01:09:33,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2259 transitions. [2019-10-15 01:09:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 01:09:33,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:33,037 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:33,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:33,254 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash 662613507, now seen corresponding path program 1 times [2019-10-15 01:09:33,254 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:33,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986789601] [2019-10-15 01:09:33,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:33,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:33,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:33,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986789601] [2019-10-15 01:09:33,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030492987] [2019-10-15 01:09:33,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:34,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 3585 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:34,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:34,136 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:34,358 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:34,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:34,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221535417] [2019-10-15 01:09:34,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:34,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:34,360 INFO L87 Difference]: Start difference. First operand 1455 states and 2259 transitions. Second operand 4 states. [2019-10-15 01:09:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:34,461 INFO L93 Difference]: Finished difference Result 2843 states and 4446 transitions. [2019-10-15 01:09:34,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:34,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-15 01:09:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:34,472 INFO L225 Difference]: With dead ends: 2843 [2019-10-15 01:09:34,472 INFO L226 Difference]: Without dead ends: 1455 [2019-10-15 01:09:34,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2019-10-15 01:09:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1455. [2019-10-15 01:09:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2019-10-15 01:09:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2257 transitions. [2019-10-15 01:09:34,532 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2257 transitions. Word has length 156 [2019-10-15 01:09:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:34,533 INFO L462 AbstractCegarLoop]: Abstraction has 1455 states and 2257 transitions. [2019-10-15 01:09:34,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2257 transitions. [2019-10-15 01:09:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:09:34,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:34,537 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:34,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:34,745 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1295948095, now seen corresponding path program 1 times [2019-10-15 01:09:34,747 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:34,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961958825] [2019-10-15 01:09:34,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:34,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:34,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961958825] [2019-10-15 01:09:34,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905667372] [2019-10-15 01:09:34,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:35,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 3587 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:35,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:35,726 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:36,014 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:36,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:36,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281412166] [2019-10-15 01:09:36,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:36,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:36,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:36,016 INFO L87 Difference]: Start difference. First operand 1455 states and 2257 transitions. Second operand 4 states. [2019-10-15 01:09:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:36,117 INFO L93 Difference]: Finished difference Result 2857 states and 4460 transitions. [2019-10-15 01:09:36,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:36,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-15 01:09:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:36,130 INFO L225 Difference]: With dead ends: 2857 [2019-10-15 01:09:36,131 INFO L226 Difference]: Without dead ends: 1473 [2019-10-15 01:09:36,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-10-15 01:09:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2019-10-15 01:09:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-10-15 01:09:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2281 transitions. [2019-10-15 01:09:36,222 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2281 transitions. Word has length 158 [2019-10-15 01:09:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:36,223 INFO L462 AbstractCegarLoop]: Abstraction has 1473 states and 2281 transitions. [2019-10-15 01:09:36,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2281 transitions. [2019-10-15 01:09:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 01:09:36,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:36,229 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:36,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:36,447 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2004070236, now seen corresponding path program 1 times [2019-10-15 01:09:36,448 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:36,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560857796] [2019-10-15 01:09:36,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:36,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:36,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:36,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560857796] [2019-10-15 01:09:36,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784221219] [2019-10-15 01:09:36,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:37,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 3588 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:37,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:37,314 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:37,527 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:37,528 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:37,528 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553272667] [2019-10-15 01:09:37,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:37,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:37,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:37,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:37,529 INFO L87 Difference]: Start difference. First operand 1473 states and 2281 transitions. Second operand 4 states. [2019-10-15 01:09:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:37,633 INFO L93 Difference]: Finished difference Result 2861 states and 4462 transitions. [2019-10-15 01:09:37,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:37,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 159 [2019-10-15 01:09:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:37,646 INFO L225 Difference]: With dead ends: 2861 [2019-10-15 01:09:37,647 INFO L226 Difference]: Without dead ends: 1473 [2019-10-15 01:09:37,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:37,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-10-15 01:09:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2019-10-15 01:09:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-10-15 01:09:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2279 transitions. [2019-10-15 01:09:37,734 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2279 transitions. Word has length 159 [2019-10-15 01:09:37,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:37,737 INFO L462 AbstractCegarLoop]: Abstraction has 1473 states and 2279 transitions. [2019-10-15 01:09:37,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2279 transitions. [2019-10-15 01:09:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 01:09:37,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:37,741 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:37,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:37,949 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 714002147, now seen corresponding path program 1 times [2019-10-15 01:09:37,950 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:37,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554644653] [2019-10-15 01:09:37,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:37,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:38,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554644653] [2019-10-15 01:09:38,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536932410] [2019-10-15 01:09:38,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:39,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 3589 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:39,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:39,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:39,283 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:39,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:09:39,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651283753] [2019-10-15 01:09:39,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:39,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:09:39,284 INFO L87 Difference]: Start difference. First operand 1473 states and 2279 transitions. Second operand 4 states. [2019-10-15 01:09:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:39,365 INFO L93 Difference]: Finished difference Result 2861 states and 4460 transitions. [2019-10-15 01:09:39,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:39,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2019-10-15 01:09:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:39,376 INFO L225 Difference]: With dead ends: 2861 [2019-10-15 01:09:39,376 INFO L226 Difference]: Without dead ends: 1473 [2019-10-15 01:09:39,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2019-10-15 01:09:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1473. [2019-10-15 01:09:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1473 states. [2019-10-15 01:09:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2277 transitions. [2019-10-15 01:09:39,444 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2277 transitions. Word has length 160 [2019-10-15 01:09:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:39,445 INFO L462 AbstractCegarLoop]: Abstraction has 1473 states and 2277 transitions. [2019-10-15 01:09:39,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2277 transitions. [2019-10-15 01:09:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:09:39,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:39,449 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:39,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:39,666 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:39,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1904546368, now seen corresponding path program 1 times [2019-10-15 01:09:39,667 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:39,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559013300] [2019-10-15 01:09:39,667 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,667 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:39,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:39,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559013300] [2019-10-15 01:09:39,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583746101] [2019-10-15 01:09:39,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:40,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:40,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:09:41,028 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:41,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:41,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 15 [2019-10-15 01:09:41,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883558675] [2019-10-15 01:09:41,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:41,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:41,416 INFO L87 Difference]: Start difference. First operand 1473 states and 2277 transitions. Second operand 7 states. [2019-10-15 01:09:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:41,556 INFO L93 Difference]: Finished difference Result 2875 states and 4478 transitions. [2019-10-15 01:09:41,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:41,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2019-10-15 01:09:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:41,567 INFO L225 Difference]: With dead ends: 2875 [2019-10-15 01:09:41,568 INFO L226 Difference]: Without dead ends: 1495 [2019-10-15 01:09:41,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 314 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2019-10-15 01:09:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1487. [2019-10-15 01:09:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1487 states. [2019-10-15 01:09:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2297 transitions. [2019-10-15 01:09:41,628 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2297 transitions. Word has length 161 [2019-10-15 01:09:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:41,628 INFO L462 AbstractCegarLoop]: Abstraction has 1487 states and 2297 transitions. [2019-10-15 01:09:41,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2297 transitions. [2019-10-15 01:09:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 01:09:41,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:41,632 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:41,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:41,841 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1892339421, now seen corresponding path program 1 times [2019-10-15 01:09:41,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:41,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784696792] [2019-10-15 01:09:41,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:41,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:41,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784696792] [2019-10-15 01:09:41,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525757652] [2019-10-15 01:09:41,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:42,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:42,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:09:42,752 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:43,074 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:43,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-15 01:09:43,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596732165] [2019-10-15 01:09:43,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:43,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:43,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:43,080 INFO L87 Difference]: Start difference. First operand 1487 states and 2297 transitions. Second operand 7 states. [2019-10-15 01:09:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:43,221 INFO L93 Difference]: Finished difference Result 2887 states and 4496 transitions. [2019-10-15 01:09:43,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:43,221 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-10-15 01:09:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:43,231 INFO L225 Difference]: With dead ends: 2887 [2019-10-15 01:09:43,231 INFO L226 Difference]: Without dead ends: 1501 [2019-10-15 01:09:43,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 314 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2019-10-15 01:09:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1493. [2019-10-15 01:09:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2019-10-15 01:09:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2307 transitions. [2019-10-15 01:09:43,304 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2307 transitions. Word has length 162 [2019-10-15 01:09:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:43,306 INFO L462 AbstractCegarLoop]: Abstraction has 1493 states and 2307 transitions. [2019-10-15 01:09:43,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2307 transitions. [2019-10-15 01:09:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 01:09:43,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:43,312 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:43,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:43,525 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1593140418, now seen corresponding path program 1 times [2019-10-15 01:09:43,527 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:43,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854706500] [2019-10-15 01:09:43,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:43,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:09:43,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854706500] [2019-10-15 01:09:43,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902251538] [2019-10-15 01:09:43,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:44,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 3591 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:44,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:09:44,406 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:44,640 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:44,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:44,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155481333] [2019-10-15 01:09:44,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:44,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:44,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:44,642 INFO L87 Difference]: Start difference. First operand 1493 states and 2307 transitions. Second operand 4 states. [2019-10-15 01:09:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:44,898 INFO L93 Difference]: Finished difference Result 2897 states and 4516 transitions. [2019-10-15 01:09:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:44,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 01:09:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:44,909 INFO L225 Difference]: With dead ends: 2897 [2019-10-15 01:09:44,909 INFO L226 Difference]: Without dead ends: 1493 [2019-10-15 01:09:44,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2019-10-15 01:09:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1493. [2019-10-15 01:09:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2019-10-15 01:09:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2297 transitions. [2019-10-15 01:09:44,981 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2297 transitions. Word has length 162 [2019-10-15 01:09:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:44,981 INFO L462 AbstractCegarLoop]: Abstraction has 1493 states and 2297 transitions. [2019-10-15 01:09:44,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2297 transitions. [2019-10-15 01:09:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:09:44,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:44,985 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:45,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:45,193 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:45,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1760837062, now seen corresponding path program 1 times [2019-10-15 01:09:45,194 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:45,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898595366] [2019-10-15 01:09:45,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:45,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:45,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:09:45,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898595366] [2019-10-15 01:09:45,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361542489] [2019-10-15 01:09:45,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:46,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 3593 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:46,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:09:46,064 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:46,262 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:46,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:46,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613077240] [2019-10-15 01:09:46,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:46,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:46,264 INFO L87 Difference]: Start difference. First operand 1493 states and 2297 transitions. Second operand 4 states. [2019-10-15 01:09:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:46,457 INFO L93 Difference]: Finished difference Result 2897 states and 4496 transitions. [2019-10-15 01:09:46,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:46,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-10-15 01:09:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:46,470 INFO L225 Difference]: With dead ends: 2897 [2019-10-15 01:09:46,470 INFO L226 Difference]: Without dead ends: 1493 [2019-10-15 01:09:46,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2019-10-15 01:09:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1493. [2019-10-15 01:09:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1493 states. [2019-10-15 01:09:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2287 transitions. [2019-10-15 01:09:46,533 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2287 transitions. Word has length 164 [2019-10-15 01:09:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:46,534 INFO L462 AbstractCegarLoop]: Abstraction has 1493 states and 2287 transitions. [2019-10-15 01:09:46,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2287 transitions. [2019-10-15 01:09:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 01:09:46,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:46,538 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:46,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:46,747 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1158081271, now seen corresponding path program 1 times [2019-10-15 01:09:46,748 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:46,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945213474] [2019-10-15 01:09:46,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:46,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:46,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:09:46,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945213474] [2019-10-15 01:09:46,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353654109] [2019-10-15 01:09:46,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:48,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 3593 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:48,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:09:48,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:48,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:48,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:48,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841442737] [2019-10-15 01:09:48,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:48,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:48,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:48,266 INFO L87 Difference]: Start difference. First operand 1493 states and 2287 transitions. Second operand 4 states. [2019-10-15 01:09:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:48,462 INFO L93 Difference]: Finished difference Result 2975 states and 4598 transitions. [2019-10-15 01:09:48,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:48,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-10-15 01:09:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:48,474 INFO L225 Difference]: With dead ends: 2975 [2019-10-15 01:09:48,474 INFO L226 Difference]: Without dead ends: 1583 [2019-10-15 01:09:48,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:09:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2019-10-15 01:09:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1571. [2019-10-15 01:09:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2019-10-15 01:09:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2411 transitions. [2019-10-15 01:09:48,538 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2411 transitions. Word has length 165 [2019-10-15 01:09:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:48,539 INFO L462 AbstractCegarLoop]: Abstraction has 1571 states and 2411 transitions. [2019-10-15 01:09:48,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2411 transitions. [2019-10-15 01:09:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:09:48,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:48,543 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:48,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:48,751 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1305702388, now seen corresponding path program 1 times [2019-10-15 01:09:48,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:48,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258405214] [2019-10-15 01:09:48,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:48,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:48,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258405214] [2019-10-15 01:09:48,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242752834] [2019-10-15 01:09:48,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:49,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 3591 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:49,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:09:49,673 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:50,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:09:50,226 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:50,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:50,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554823236] [2019-10-15 01:09:50,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:50,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:50,228 INFO L87 Difference]: Start difference. First operand 1571 states and 2411 transitions. Second operand 9 states. [2019-10-15 01:09:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:50,463 INFO L93 Difference]: Finished difference Result 2977 states and 4600 transitions. [2019-10-15 01:09:50,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:50,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 166 [2019-10-15 01:09:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:50,473 INFO L225 Difference]: With dead ends: 2977 [2019-10-15 01:09:50,473 INFO L226 Difference]: Without dead ends: 1593 [2019-10-15 01:09:50,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 317 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2019-10-15 01:09:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1575. [2019-10-15 01:09:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1575 states. [2019-10-15 01:09:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2419 transitions. [2019-10-15 01:09:50,529 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2419 transitions. Word has length 166 [2019-10-15 01:09:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:50,530 INFO L462 AbstractCegarLoop]: Abstraction has 1575 states and 2419 transitions. [2019-10-15 01:09:50,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2419 transitions. [2019-10-15 01:09:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:09:50,534 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:50,534 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:50,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:50,747 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash 352500755, now seen corresponding path program 1 times [2019-10-15 01:09:50,748 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:50,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135379579] [2019-10-15 01:09:50,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:50,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:09:50,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135379579] [2019-10-15 01:09:50,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22602212] [2019-10-15 01:09:50,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:51,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 3590 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:51,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:51,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:51,962 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:51,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:51,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396026061] [2019-10-15 01:09:51,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:51,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:51,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:51,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:51,964 INFO L87 Difference]: Start difference. First operand 1575 states and 2419 transitions. Second operand 11 states. [2019-10-15 01:09:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:52,140 INFO L93 Difference]: Finished difference Result 2845 states and 4394 transitions. [2019-10-15 01:09:52,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:52,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 166 [2019-10-15 01:09:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:52,154 INFO L225 Difference]: With dead ends: 2845 [2019-10-15 01:09:52,154 INFO L226 Difference]: Without dead ends: 1609 [2019-10-15 01:09:52,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2019-10-15 01:09:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1589. [2019-10-15 01:09:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-10-15 01:09:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2439 transitions. [2019-10-15 01:09:52,215 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2439 transitions. Word has length 166 [2019-10-15 01:09:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:52,215 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2439 transitions. [2019-10-15 01:09:52,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2439 transitions. [2019-10-15 01:09:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 01:09:52,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:52,224 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:52,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:52,432 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:52,432 INFO L82 PathProgramCache]: Analyzing trace with hash 183648601, now seen corresponding path program 1 times [2019-10-15 01:09:52,432 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:52,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847929576] [2019-10-15 01:09:52,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:52,433 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:52,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-15 01:09:52,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847929576] [2019-10-15 01:09:52,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736976036] [2019-10-15 01:09:52,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:53,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 3591 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:53,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:53,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-15 01:09:53,699 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:53,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:53,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534551202] [2019-10-15 01:09:53,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:53,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:53,701 INFO L87 Difference]: Start difference. First operand 1589 states and 2439 transitions. Second operand 8 states. [2019-10-15 01:09:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:53,824 INFO L93 Difference]: Finished difference Result 2853 states and 4408 transitions. [2019-10-15 01:09:53,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:53,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 167 [2019-10-15 01:09:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:53,834 INFO L225 Difference]: With dead ends: 2853 [2019-10-15 01:09:53,834 INFO L226 Difference]: Without dead ends: 1617 [2019-10-15 01:09:53,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2019-10-15 01:09:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1603. [2019-10-15 01:09:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1603 states. [2019-10-15 01:09:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2461 transitions. [2019-10-15 01:09:53,898 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2461 transitions. Word has length 167 [2019-10-15 01:09:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:53,898 INFO L462 AbstractCegarLoop]: Abstraction has 1603 states and 2461 transitions. [2019-10-15 01:09:53,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2461 transitions. [2019-10-15 01:09:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-15 01:09:53,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:53,903 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:54,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:54,110 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1058100441, now seen corresponding path program 1 times [2019-10-15 01:09:54,111 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:54,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127045619] [2019-10-15 01:09:54,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:54,111 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:54,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 01:09:54,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127045619] [2019-10-15 01:09:54,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014946916] [2019-10-15 01:09:54,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:54,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 3587 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:54,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:09:55,064 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:55,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:09:55,544 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:55,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:55,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824590408] [2019-10-15 01:09:55,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:55,545 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:55,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:55,546 INFO L87 Difference]: Start difference. First operand 1603 states and 2461 transitions. Second operand 14 states. [2019-10-15 01:09:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:55,876 INFO L93 Difference]: Finished difference Result 2855 states and 4412 transitions. [2019-10-15 01:09:55,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:55,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2019-10-15 01:09:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:55,888 INFO L225 Difference]: With dead ends: 2855 [2019-10-15 01:09:55,888 INFO L226 Difference]: Without dead ends: 1619 [2019-10-15 01:09:55,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 320 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2019-10-15 01:09:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1603. [2019-10-15 01:09:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1603 states. [2019-10-15 01:09:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2461 transitions. [2019-10-15 01:09:56,019 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2461 transitions. Word has length 167 [2019-10-15 01:09:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:56,019 INFO L462 AbstractCegarLoop]: Abstraction has 1603 states and 2461 transitions. [2019-10-15 01:09:56,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2461 transitions. [2019-10-15 01:09:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:09:56,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:56,025 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:56,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:56,227 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 988944145, now seen corresponding path program 1 times [2019-10-15 01:09:56,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:56,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896290516] [2019-10-15 01:09:56,227 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:56,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:56,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY