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_product17.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:43,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:43,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:43,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:43,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:43,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:43,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:43,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:43,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:43,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:43,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:43,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:43,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:43,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:43,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:43,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:43,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:43,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:43,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:43,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:43,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:43,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:43,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:43,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:43,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:43,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:43,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:43,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:43,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:43,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:43,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:43,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:43,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:43,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:43,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:43,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:43,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:43,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:43,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:43,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:43,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:43,482 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 01:08:43,508 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:43,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:43,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:43,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:43,511 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:43,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:43,512 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:43,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:43,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:43,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:43,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:43,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:43,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:43,514 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:43,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:43,514 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:43,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:43,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:43,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:43,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:43,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:43,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:43,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:43,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:43,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:43,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:43,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:43,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:43,517 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 01:08:43,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:43,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:43,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:43,794 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:43,794 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:43,795 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c [2019-10-15 01:08:43,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc08412a4/e558f0beca324bba9bd694be60850d25/FLAGf58d28f2b [2019-10-15 01:08:44,483 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:44,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product17.cil.c [2019-10-15 01:08:44,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc08412a4/e558f0beca324bba9bd694be60850d25/FLAGf58d28f2b [2019-10-15 01:08:44,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc08412a4/e558f0beca324bba9bd694be60850d25 [2019-10-15 01:08:44,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:44,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:44,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:44,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:44,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:44,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:44" (1/1) ... [2019-10-15 01:08:44,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:44, skipping insertion in model container [2019-10-15 01:08:44,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:44" (1/1) ... [2019-10-15 01:08:44,735 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:44,822 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:45,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:45,546 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:45,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:45,715 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:45,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45 WrapperNode [2019-10-15 01:08:45,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:45,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:45,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:45,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:45,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (1/1) ... [2019-10-15 01:08:45,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:45,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:45,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:45,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:45,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (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 01:08:45,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:45,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:45,996 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:45,997 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:45,997 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:45,998 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:45,998 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:45,999 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:45,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:45,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:45,999 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:46,001 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:08:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:08:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:46,014 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:46,014 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:46,017 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:46,018 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:46,019 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:46,019 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:46,020 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:46,020 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:46,020 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:46,020 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:46,021 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:46,021 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:46,022 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:46,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:46,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:46,026 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:46,026 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:46,026 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:46,026 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:46,027 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:46,028 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:46,028 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:46,028 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:46,028 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:46,028 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:46,029 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:46,029 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:46,030 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:46,031 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:46,031 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:46,032 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:46,032 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:46,032 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:08:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:08:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:46,039 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:46,040 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:46,041 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:46,046 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:46,047 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:46,048 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:46,048 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:46,048 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:46,049 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:46,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:46,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:48,261 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:48,261 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:48,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:48 BoogieIcfgContainer [2019-10-15 01:08:48,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:48,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:48,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:48,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:48,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:44" (1/3) ... [2019-10-15 01:08:48,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a53a98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:48, skipping insertion in model container [2019-10-15 01:08:48,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:45" (2/3) ... [2019-10-15 01:08:48,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a53a98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:48, skipping insertion in model container [2019-10-15 01:08:48,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:48" (3/3) ... [2019-10-15 01:08:48,271 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2019-10-15 01:08:48,282 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:48,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:48,304 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:48,336 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:48,336 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:48,336 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:48,336 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:48,336 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:48,337 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:48,337 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:48,337 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states. [2019-10-15 01:08:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 01:08:48,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:48,396 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:48,397 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1132113922, now seen corresponding path program 1 times [2019-10-15 01:08:48,412 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:48,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762547937] [2019-10-15 01:08:48,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:48,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:48,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:49,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762547937] [2019-10-15 01:08:49,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161038479] [2019-10-15 01:08:49,066 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 01:08:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:49,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 3207 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:49,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:50,018 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:08:50,230 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:50,231 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:50,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456613474] [2019-10-15 01:08:50,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:50,240 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:50,257 INFO L87 Difference]: Start difference. First operand 743 states. Second operand 2 states. [2019-10-15 01:08:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:50,333 INFO L93 Difference]: Finished difference Result 626 states and 1002 transitions. [2019-10-15 01:08:50,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:50,337 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-15 01:08:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:50,379 INFO L225 Difference]: With dead ends: 626 [2019-10-15 01:08:50,379 INFO L226 Difference]: Without dead ends: 589 [2019-10-15 01:08:50,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-15 01:08:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-10-15 01:08:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-10-15 01:08:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 947 transitions. [2019-10-15 01:08:50,504 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 947 transitions. Word has length 138 [2019-10-15 01:08:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:50,507 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 947 transitions. [2019-10-15 01:08:50,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 947 transitions. [2019-10-15 01:08:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 01:08:50,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:50,517 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:50,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:50,724 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash 296066837, now seen corresponding path program 1 times [2019-10-15 01:08:50,726 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:50,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350655597] [2019-10-15 01:08:50,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,727 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:50,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:50,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350655597] [2019-10-15 01:08:50,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027831742] [2019-10-15 01:08:50,929 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 01:08:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:51,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:51,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:51,575 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:51,884 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:51,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:51,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900631196] [2019-10-15 01:08:51,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:51,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:51,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:51,887 INFO L87 Difference]: Start difference. First operand 589 states and 947 transitions. Second operand 4 states. [2019-10-15 01:08:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:52,009 INFO L93 Difference]: Finished difference Result 1150 states and 1867 transitions. [2019-10-15 01:08:52,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:52,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 01:08:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:52,015 INFO L225 Difference]: With dead ends: 1150 [2019-10-15 01:08:52,015 INFO L226 Difference]: Without dead ends: 589 [2019-10-15 01:08:52,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 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 01:08:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-15 01:08:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-10-15 01:08:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-10-15 01:08:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 946 transitions. [2019-10-15 01:08:52,064 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 946 transitions. Word has length 140 [2019-10-15 01:08:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:52,065 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 946 transitions. [2019-10-15 01:08:52,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 946 transitions. [2019-10-15 01:08:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 01:08:52,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:52,072 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:52,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:52,284 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1619685945, now seen corresponding path program 1 times [2019-10-15 01:08:52,285 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:52,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364493030] [2019-10-15 01:08:52,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:52,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:52,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364493030] [2019-10-15 01:08:52,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745314773] [2019-10-15 01:08:52,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:08:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 3212 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:53,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:53,113 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:53,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:53,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:53,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732163079] [2019-10-15 01:08:53,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:53,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:53,319 INFO L87 Difference]: Start difference. First operand 589 states and 946 transitions. Second operand 4 states. [2019-10-15 01:08:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:53,405 INFO L93 Difference]: Finished difference Result 1150 states and 1865 transitions. [2019-10-15 01:08:53,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:53,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-15 01:08:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:53,411 INFO L225 Difference]: With dead ends: 1150 [2019-10-15 01:08:53,411 INFO L226 Difference]: Without dead ends: 589 [2019-10-15 01:08:53,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 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 01:08:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-15 01:08:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2019-10-15 01:08:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2019-10-15 01:08:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 945 transitions. [2019-10-15 01:08:53,442 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 945 transitions. Word has length 142 [2019-10-15 01:08:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:53,443 INFO L462 AbstractCegarLoop]: Abstraction has 589 states and 945 transitions. [2019-10-15 01:08:53,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 945 transitions. [2019-10-15 01:08:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:08:53,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:53,447 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:53,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:53,656 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1401716195, now seen corresponding path program 1 times [2019-10-15 01:08:53,656 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:53,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83996486] [2019-10-15 01:08:53,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:53,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:53,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:53,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83996486] [2019-10-15 01:08:53,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063233297] [2019-10-15 01:08:53,847 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 01:08:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:54,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:54,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:54,527 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:54,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:54,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:54,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194852158] [2019-10-15 01:08:54,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:54,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:54,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:54,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:54,717 INFO L87 Difference]: Start difference. First operand 589 states and 945 transitions. Second operand 4 states. [2019-10-15 01:08:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:54,800 INFO L93 Difference]: Finished difference Result 1157 states and 1872 transitions. [2019-10-15 01:08:54,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:54,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-15 01:08:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:54,806 INFO L225 Difference]: With dead ends: 1157 [2019-10-15 01:08:54,806 INFO L226 Difference]: Without dead ends: 598 [2019-10-15 01:08:54,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 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 01:08:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-15 01:08:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-15 01:08:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-15 01:08:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 957 transitions. [2019-10-15 01:08:54,847 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 957 transitions. Word has length 144 [2019-10-15 01:08:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:54,848 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 957 transitions. [2019-10-15 01:08:54,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 957 transitions. [2019-10-15 01:08:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:08:54,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:54,857 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:55,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:55,065 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1990322423, now seen corresponding path program 1 times [2019-10-15 01:08:55,066 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:55,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609049788] [2019-10-15 01:08:55,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:55,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:55,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609049788] [2019-10-15 01:08:55,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166648340] [2019-10-15 01:08:55,178 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 01:08:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:55,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:55,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:55,855 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:56,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:56,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:56,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106080214] [2019-10-15 01:08:56,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:56,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:56,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:56,067 INFO L87 Difference]: Start difference. First operand 598 states and 957 transitions. Second operand 4 states. [2019-10-15 01:08:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:56,146 INFO L93 Difference]: Finished difference Result 1159 states and 1873 transitions. [2019-10-15 01:08:56,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:56,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-15 01:08:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:56,153 INFO L225 Difference]: With dead ends: 1159 [2019-10-15 01:08:56,153 INFO L226 Difference]: Without dead ends: 598 [2019-10-15 01:08:56,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 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 01:08:56,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-15 01:08:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-15 01:08:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-15 01:08:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 956 transitions. [2019-10-15 01:08:56,184 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 956 transitions. Word has length 145 [2019-10-15 01:08:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:56,185 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 956 transitions. [2019-10-15 01:08:56,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 956 transitions. [2019-10-15 01:08:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 01:08:56,189 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:56,189 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:08:56,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:56,397 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash 769578593, now seen corresponding path program 1 times [2019-10-15 01:08:56,398 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:56,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130507638] [2019-10-15 01:08:56,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:56,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:56,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:56,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130507638] [2019-10-15 01:08:56,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141755842] [2019-10-15 01:08:56,501 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 01:08:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:57,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:57,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:08:57,222 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:57,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:57,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:57,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984815368] [2019-10-15 01:08:57,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:57,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:57,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:57,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:57,546 INFO L87 Difference]: Start difference. First operand 598 states and 956 transitions. Second operand 4 states. [2019-10-15 01:08:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:57,648 INFO L93 Difference]: Finished difference Result 1159 states and 1872 transitions. [2019-10-15 01:08:57,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:57,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-15 01:08:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:57,655 INFO L225 Difference]: With dead ends: 1159 [2019-10-15 01:08:57,655 INFO L226 Difference]: Without dead ends: 598 [2019-10-15 01:08:57,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 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 01:08:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2019-10-15 01:08:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2019-10-15 01:08:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-10-15 01:08:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 955 transitions. [2019-10-15 01:08:57,699 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 955 transitions. Word has length 146 [2019-10-15 01:08:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:57,700 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 955 transitions. [2019-10-15 01:08:57,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 955 transitions. [2019-10-15 01:08:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:08:57,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:57,707 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:08:57,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:57,926 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1713500357, now seen corresponding path program 1 times [2019-10-15 01:08:57,927 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:57,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981198993] [2019-10-15 01:08:57,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:57,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:58,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981198993] [2019-10-15 01:08:58,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823018323] [2019-10-15 01:08:58,122 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 01:08:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:58,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:58,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:08:58,874 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:08:59,225 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:59,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-15 01:08:59,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004123107] [2019-10-15 01:08:59,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:08:59,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:08:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:59,228 INFO L87 Difference]: Start difference. First operand 598 states and 955 transitions. Second operand 7 states. [2019-10-15 01:08:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:59,355 INFO L93 Difference]: Finished difference Result 1166 states and 1881 transitions. [2019-10-15 01:08:59,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:08:59,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-15 01:08:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:59,361 INFO L225 Difference]: With dead ends: 1166 [2019-10-15 01:08:59,361 INFO L226 Difference]: Without dead ends: 609 [2019-10-15 01:08:59,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:08:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-15 01:08:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 605. [2019-10-15 01:08:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-15 01:08:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 965 transitions. [2019-10-15 01:08:59,389 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 965 transitions. Word has length 147 [2019-10-15 01:08:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:59,389 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 965 transitions. [2019-10-15 01:08:59,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:08:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 965 transitions. [2019-10-15 01:08:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:08:59,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:59,394 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:08:59,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:59,605 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:59,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1757785468, now seen corresponding path program 1 times [2019-10-15 01:08:59,606 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:59,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575834239] [2019-10-15 01:08:59,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,607 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:59,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:08:59,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575834239] [2019-10-15 01:08:59,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767243809] [2019-10-15 01:08:59,777 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 01:09:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:00,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:00,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:00,494 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:00,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:00,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:09:00,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507110552] [2019-10-15 01:09:00,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:00,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:00,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:00,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:09:00,707 INFO L87 Difference]: Start difference. First operand 605 states and 965 transitions. Second operand 4 states. [2019-10-15 01:09:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:00,880 INFO L93 Difference]: Finished difference Result 1171 states and 1892 transitions. [2019-10-15 01:09:00,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:00,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-15 01:09:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:00,888 INFO L225 Difference]: With dead ends: 1171 [2019-10-15 01:09:00,889 INFO L226 Difference]: Without dead ends: 605 [2019-10-15 01:09:00,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 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 01:09:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-15 01:09:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-15 01:09:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-15 01:09:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 960 transitions. [2019-10-15 01:09:00,923 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 960 transitions. Word has length 147 [2019-10-15 01:09:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:00,924 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 960 transitions. [2019-10-15 01:09:00,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 960 transitions. [2019-10-15 01:09:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:09:00,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:00,931 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:01,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:01,138 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:01,139 INFO L82 PathProgramCache]: Analyzing trace with hash 157892612, now seen corresponding path program 1 times [2019-10-15 01:09:01,139 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:01,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417438861] [2019-10-15 01:09:01,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:01,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:01,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417438861] [2019-10-15 01:09:01,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880141820] [2019-10-15 01:09:01,318 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 01:09:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:01,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 3220 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:01,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:02,011 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:02,293 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:02,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:02,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650551447] [2019-10-15 01:09:02,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:02,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:02,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:02,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:02,296 INFO L87 Difference]: Start difference. First operand 605 states and 960 transitions. Second operand 4 states. [2019-10-15 01:09:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:02,479 INFO L93 Difference]: Finished difference Result 1171 states and 1882 transitions. [2019-10-15 01:09:02,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:09:02,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-10-15 01:09:02,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:02,486 INFO L225 Difference]: With dead ends: 1171 [2019-10-15 01:09:02,486 INFO L226 Difference]: Without dead ends: 605 [2019-10-15 01:09:02,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 297 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 01:09:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2019-10-15 01:09:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2019-10-15 01:09:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-10-15 01:09:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 955 transitions. [2019-10-15 01:09:02,519 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 955 transitions. Word has length 150 [2019-10-15 01:09:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:02,520 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 955 transitions. [2019-10-15 01:09:02,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 955 transitions. [2019-10-15 01:09:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:02,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:02,525 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:02,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:02,737 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 500102925, now seen corresponding path program 1 times [2019-10-15 01:09:02,737 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:02,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599745393] [2019-10-15 01:09:02,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,738 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:02,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:02,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599745393] [2019-10-15 01:09:02,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895099670] [2019-10-15 01:09:02,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:09:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:03,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 3221 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:03,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:03,585 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:03,901 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:03,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-15 01:09:03,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469008084] [2019-10-15 01:09:03,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:09:03,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:09:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:03,903 INFO L87 Difference]: Start difference. First operand 605 states and 955 transitions. Second operand 7 states. [2019-10-15 01:09:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:04,013 INFO L93 Difference]: Finished difference Result 1172 states and 1870 transitions. [2019-10-15 01:09:04,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:04,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 152 [2019-10-15 01:09:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:04,019 INFO L225 Difference]: With dead ends: 1172 [2019-10-15 01:09:04,019 INFO L226 Difference]: Without dead ends: 612 [2019-10-15 01:09:04,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 294 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 01:09:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-15 01:09:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 608. [2019-10-15 01:09:04,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2019-10-15 01:09:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 960 transitions. [2019-10-15 01:09:04,043 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 960 transitions. Word has length 152 [2019-10-15 01:09:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:04,044 INFO L462 AbstractCegarLoop]: Abstraction has 608 states and 960 transitions. [2019-10-15 01:09:04,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:09:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 960 transitions. [2019-10-15 01:09:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:04,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:04,048 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:04,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:04,263 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:04,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1481059154, now seen corresponding path program 1 times [2019-10-15 01:09:04,264 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:04,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243667495] [2019-10-15 01:09:04,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:04,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:09:04,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243667495] [2019-10-15 01:09:04,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425609714] [2019-10-15 01:09:04,384 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 01:09:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 3222 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:09:05,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:05,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:05,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:05,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-15 01:09:05,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911532100] [2019-10-15 01:09:05,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:09:05,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:09:05,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:05,325 INFO L87 Difference]: Start difference. First operand 608 states and 960 transitions. Second operand 4 states. [2019-10-15 01:09:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:05,531 INFO L93 Difference]: Finished difference Result 1216 states and 1941 transitions. [2019-10-15 01:09:05,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:09:05,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-15 01:09:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:05,537 INFO L225 Difference]: With dead ends: 1216 [2019-10-15 01:09:05,537 INFO L226 Difference]: Without dead ends: 653 [2019-10-15 01:09:05,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 301 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 01:09:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2019-10-15 01:09:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 647. [2019-10-15 01:09:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2019-10-15 01:09:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1022 transitions. [2019-10-15 01:09:05,564 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1022 transitions. Word has length 152 [2019-10-15 01:09:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:05,565 INFO L462 AbstractCegarLoop]: Abstraction has 647 states and 1022 transitions. [2019-10-15 01:09:05,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:09:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1022 transitions. [2019-10-15 01:09:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:05,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:05,569 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:05,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:05,777 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2098391086, now seen corresponding path program 1 times [2019-10-15 01:09:05,777 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:05,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057802514] [2019-10-15 01:09:05,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,778 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:05,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:05,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057802514] [2019-10-15 01:09:05,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856408869] [2019-10-15 01:09:05,919 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 01:09:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:06,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:06,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:09:06,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:07,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:07,216 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:09:07,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:09:07,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574946800] [2019-10-15 01:09:07,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:07,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:07,218 INFO L87 Difference]: Start difference. First operand 647 states and 1022 transitions. Second operand 9 states. [2019-10-15 01:09:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:07,412 INFO L93 Difference]: Finished difference Result 1217 states and 1942 transitions. [2019-10-15 01:09:07,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:07,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-15 01:09:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:07,417 INFO L225 Difference]: With dead ends: 1217 [2019-10-15 01:09:07,418 INFO L226 Difference]: Without dead ends: 658 [2019-10-15 01:09:07,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:09:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-10-15 01:09:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 649. [2019-10-15 01:09:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2019-10-15 01:09:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1026 transitions. [2019-10-15 01:09:07,448 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1026 transitions. Word has length 152 [2019-10-15 01:09:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:07,449 INFO L462 AbstractCegarLoop]: Abstraction has 649 states and 1026 transitions. [2019-10-15 01:09:07,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1026 transitions. [2019-10-15 01:09:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 01:09:07,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:07,457 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:07,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:07,665 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:07,666 INFO L82 PathProgramCache]: Analyzing trace with hash -215414131, now seen corresponding path program 1 times [2019-10-15 01:09:07,666 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:07,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966750520] [2019-10-15 01:09:07,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:07,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:07,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966750520] [2019-10-15 01:09:07,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984802993] [2019-10-15 01:09:07,848 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 01:09:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:08,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:08,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:08,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:08,866 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:08,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:09:08,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464385448] [2019-10-15 01:09:08,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:08,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:08,868 INFO L87 Difference]: Start difference. First operand 649 states and 1026 transitions. Second operand 11 states. [2019-10-15 01:09:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:09,037 INFO L93 Difference]: Finished difference Result 1151 states and 1839 transitions. [2019-10-15 01:09:09,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:09:09,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-15 01:09:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:09,042 INFO L225 Difference]: With dead ends: 1151 [2019-10-15 01:09:09,042 INFO L226 Difference]: Without dead ends: 666 [2019-10-15 01:09:09,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 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 01:09:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-15 01:09:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 656. [2019-10-15 01:09:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2019-10-15 01:09:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 1036 transitions. [2019-10-15 01:09:09,068 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 1036 transitions. Word has length 152 [2019-10-15 01:09:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:09,069 INFO L462 AbstractCegarLoop]: Abstraction has 656 states and 1036 transitions. [2019-10-15 01:09:09,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 1036 transitions. [2019-10-15 01:09:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:09:09,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:09,073 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:09,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:09,281 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1619123996, now seen corresponding path program 1 times [2019-10-15 01:09:09,281 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:09,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117265242] [2019-10-15 01:09:09,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:09,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:09:09,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117265242] [2019-10-15 01:09:09,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604936544] [2019-10-15 01:09:09,384 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 01:09:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 3218 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:09:10,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:10,171 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:09:10,470 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:10,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:09:10,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754682141] [2019-10-15 01:09:10,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:10,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:10,472 INFO L87 Difference]: Start difference. First operand 656 states and 1036 transitions. Second operand 8 states. [2019-10-15 01:09:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:10,588 INFO L93 Difference]: Finished difference Result 1155 states and 1846 transitions. [2019-10-15 01:09:10,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:10,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 153 [2019-10-15 01:09:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:10,593 INFO L225 Difference]: With dead ends: 1155 [2019-10-15 01:09:10,593 INFO L226 Difference]: Without dead ends: 670 [2019-10-15 01:09:10,596 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 297 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 01:09:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-10-15 01:09:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 663. [2019-10-15 01:09:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-15 01:09:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1047 transitions. [2019-10-15 01:09:10,631 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1047 transitions. Word has length 153 [2019-10-15 01:09:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:10,632 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1047 transitions. [2019-10-15 01:09:10,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1047 transitions. [2019-10-15 01:09:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:09:10,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:10,636 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:10,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:10,843 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash 609178724, now seen corresponding path program 1 times [2019-10-15 01:09:10,844 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:10,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120253793] [2019-10-15 01:09:10,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:10,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:10,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120253793] [2019-10-15 01:09:10,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980919179] [2019-10-15 01:09:10,935 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 01:09:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:11,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 3214 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:11,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:11,695 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:12,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:12,193 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:12,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-15 01:09:12,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765108512] [2019-10-15 01:09:12,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:09:12,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:12,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:09:12,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:09:12,195 INFO L87 Difference]: Start difference. First operand 663 states and 1047 transitions. Second operand 14 states. [2019-10-15 01:09:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:12,426 INFO L93 Difference]: Finished difference Result 1156 states and 1848 transitions. [2019-10-15 01:09:12,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:09:12,426 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2019-10-15 01:09:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:12,431 INFO L225 Difference]: With dead ends: 1156 [2019-10-15 01:09:12,431 INFO L226 Difference]: Without dead ends: 671 [2019-10-15 01:09:12,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 292 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 01:09:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-10-15 01:09:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 663. [2019-10-15 01:09:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-10-15 01:09:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1047 transitions. [2019-10-15 01:09:12,462 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1047 transitions. Word has length 153 [2019-10-15 01:09:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:12,462 INFO L462 AbstractCegarLoop]: Abstraction has 663 states and 1047 transitions. [2019-10-15 01:09:12,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:09:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1047 transitions. [2019-10-15 01:09:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:09:12,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:12,467 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:09:12,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:12,682 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1274916198, now seen corresponding path program 1 times [2019-10-15 01:09:12,682 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:12,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119426684] [2019-10-15 01:09:12,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:12,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:12,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119426684] [2019-10-15 01:09:12,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956239893] [2019-10-15 01:09:12,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:13,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:09:13,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:13,830 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:14,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:09:14,263 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:14,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-15 01:09:14,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259387185] [2019-10-15 01:09:14,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:09:14,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:14,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:09:14,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:09:14,265 INFO L87 Difference]: Start difference. First operand 663 states and 1047 transitions. Second operand 11 states. [2019-10-15 01:09:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:14,489 INFO L93 Difference]: Finished difference Result 1159 states and 1858 transitions. [2019-10-15 01:09:14,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:09:14,490 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-15 01:09:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:14,496 INFO L225 Difference]: With dead ends: 1159 [2019-10-15 01:09:14,496 INFO L226 Difference]: Without dead ends: 674 [2019-10-15 01:09:14,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:09:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-10-15 01:09:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 665. [2019-10-15 01:09:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2019-10-15 01:09:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1054 transitions. [2019-10-15 01:09:14,523 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1054 transitions. Word has length 154 [2019-10-15 01:09:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:14,523 INFO L462 AbstractCegarLoop]: Abstraction has 665 states and 1054 transitions. [2019-10-15 01:09:14,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:09:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1054 transitions. [2019-10-15 01:09:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 01:09:14,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:14,528 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:14,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:14,743 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 685050111, now seen corresponding path program 1 times [2019-10-15 01:09:14,743 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:14,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607001127] [2019-10-15 01:09:14,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:14,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:14,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607001127] [2019-10-15 01:09:14,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227693161] [2019-10-15 01:09:14,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:15,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 3216 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:15,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:15,655 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:15,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:16,031 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:16,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 11 [2019-10-15 01:09:16,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852990623] [2019-10-15 01:09:16,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:09:16,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:09:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:09:16,032 INFO L87 Difference]: Start difference. First operand 665 states and 1054 transitions. Second operand 9 states. [2019-10-15 01:09:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:16,156 INFO L93 Difference]: Finished difference Result 1255 states and 2027 transitions. [2019-10-15 01:09:16,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:09:16,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-15 01:09:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:16,161 INFO L225 Difference]: With dead ends: 1255 [2019-10-15 01:09:16,161 INFO L226 Difference]: Without dead ends: 674 [2019-10-15 01:09:16,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:09:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2019-10-15 01:09:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2019-10-15 01:09:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2019-10-15 01:09:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1062 transitions. [2019-10-15 01:09:16,185 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1062 transitions. Word has length 155 [2019-10-15 01:09:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:16,187 INFO L462 AbstractCegarLoop]: Abstraction has 672 states and 1062 transitions. [2019-10-15 01:09:16,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:09:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1062 transitions. [2019-10-15 01:09:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 01:09:16,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:16,191 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:16,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:16,400 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:16,400 INFO L82 PathProgramCache]: Analyzing trace with hash 810500539, now seen corresponding path program 1 times [2019-10-15 01:09:16,401 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:16,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246670586] [2019-10-15 01:09:16,402 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,402 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:16,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:16,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246670586] [2019-10-15 01:09:16,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121773243] [2019-10-15 01:09:16,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:17,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 3217 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:09:17,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:17,275 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:09:17,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:09:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:09:17,567 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:09:17,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2019-10-15 01:09:17,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134422281] [2019-10-15 01:09:17,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:09:17,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:09:17,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:09:17,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:09:17,569 INFO L87 Difference]: Start difference. First operand 672 states and 1062 transitions. Second operand 8 states. [2019-10-15 01:09:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:09:17,685 INFO L93 Difference]: Finished difference Result 1269 states and 2037 transitions. [2019-10-15 01:09:17,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:09:17,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 156 [2019-10-15 01:09:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:09:17,691 INFO L225 Difference]: With dead ends: 1269 [2019-10-15 01:09:17,691 INFO L226 Difference]: Without dead ends: 681 [2019-10-15 01:09:17,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:09:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-10-15 01:09:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 676. [2019-10-15 01:09:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2019-10-15 01:09:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1068 transitions. [2019-10-15 01:09:17,715 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1068 transitions. Word has length 156 [2019-10-15 01:09:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:09:17,716 INFO L462 AbstractCegarLoop]: Abstraction has 676 states and 1068 transitions. [2019-10-15 01:09:17,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:09:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1068 transitions. [2019-10-15 01:09:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:09:17,720 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:09:17,720 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:17,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:17,929 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:09:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:09:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -451448232, now seen corresponding path program 1 times [2019-10-15 01:09:17,930 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:09:17,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183293978] [2019-10-15 01:09:17,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:09:17,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:09:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:09:18,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183293978] [2019-10-15 01:09:18,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700753016] [2019-10-15 01:09:18,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:09:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:09:18,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 3215 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:09:18,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:09:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:09:18,872 INFO L321 TraceCheckSpWp]: Computing backward predicates...