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_spec13_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:08:40,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:08:40,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:08:40,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:08:40,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:08:40,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:08:40,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:08:40,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:08:40,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:08:40,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:08:40,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:08:40,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:08:40,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:08:40,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:08:40,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:08:40,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:08:40,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:08:40,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:08:40,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:08:40,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:08:40,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:08:40,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:08:40,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:08:40,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:08:41,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:08:41,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:08:41,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:08:41,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:08:41,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:08:41,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:08:41,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:08:41,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:08:41,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:08:41,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:08:41,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:08:41,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:08:41,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:08:41,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:08:41,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:08:41,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:08:41,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:08:41,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:08:41,037 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:08:41,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:08:41,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:08:41,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:08:41,040 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:08:41,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:08:41,040 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:08:41,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:08:41,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:08:41,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:08:41,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:08:41,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:08:41,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:08:41,043 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:08:41,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:08:41,043 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:08:41,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:08:41,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:08:41,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:08:41,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:08:41,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:08:41,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:41,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:08:41,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:08:41,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:08:41,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:08:41,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:08:41,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:08:41,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:08:41,297 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:08:41,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:08:41,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:08:41,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:08:41,317 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:08:41,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product32.cil.c [2019-10-13 21:08:41,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c71b3bcf/05a0b1dad3024056b2bb953e7e794909/FLAGf4a064946 [2019-10-13 21:08:42,028 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:08:42,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product32.cil.c [2019-10-13 21:08:42,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c71b3bcf/05a0b1dad3024056b2bb953e7e794909/FLAGf4a064946 [2019-10-13 21:08:42,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c71b3bcf/05a0b1dad3024056b2bb953e7e794909 [2019-10-13 21:08:42,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:08:42,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:08:42,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:42,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:08:42,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:08:42,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39284e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:42, skipping insertion in model container [2019-10-13 21:08:42,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:08:42" (1/1) ... [2019-10-13 21:08:42,233 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:08:42,318 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:08:43,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:43,037 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:08:43,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:08:43,233 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:08:43,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43 WrapperNode [2019-10-13 21:08:43,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:08:43,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:08:43,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:08:43,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:08:43,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... [2019-10-13 21:08:43,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:08:43,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:08:43,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:08:43,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:08:43,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:08:43,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:08:43,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:08:43,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:43,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:08:43,510 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:08:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:08:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:08:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:08:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:08:43,513 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:08:43,513 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:08:43,514 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:08:43,514 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:08:43,514 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:08:43,516 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:08:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:08:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:08:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:08:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:08:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:08:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:08:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:08:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:08:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:08:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:08:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:08:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:08:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:08:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:08:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:08:43,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:08:43,520 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:08:43,520 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:08:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:08:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:08:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:08:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:08:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:08:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:08:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:08:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:08:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:08:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:08:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:08:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:08:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:08:43,523 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:08:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:08:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:08:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:08:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:08:43,524 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:08:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:08:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:08:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:08:43,525 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:08:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:08:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:08:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:08:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:08:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:43,528 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:43,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:08:43,528 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:08:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-13 21:08:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:08:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-13 21:08:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:08:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:08:43,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:08:43,530 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:08:43,530 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:08:43,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:08:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:08:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:08:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:08:43,532 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:08:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:08:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:08:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:08:43,533 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:08:43,534 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:08:43,534 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:08:43,534 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:08:43,534 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:08:43,534 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 21:08:43,535 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:08:43,535 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 21:08:43,535 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:08:43,535 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:08:43,535 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:08:43,535 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:08:43,536 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:08:43,536 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:08:43,536 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:08:43,536 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:08:43,536 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:08:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:08:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:08:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:08:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:08:43,537 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:08:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:08:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:08:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:08:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:08:43,538 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:08:43,539 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:08:43,539 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:08:43,539 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:08:43,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:08:43,540 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:08:43,540 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:08:43,541 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:08:43,541 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:08:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:08:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:08:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:08:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:08:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:08:43,542 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:08:43,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:08:43,543 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:08:43,543 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:08:43,543 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:08:43,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:08:43,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:08:43,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:08:43,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:08:43,548 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:08:43,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:08:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:08:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:08:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:08:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:08:43,555 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:08:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:08:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:08:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:08:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:08:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:08:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:08:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:08:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:08:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:08:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:08:45,841 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:08:45,842 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:08:45,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:45 BoogieIcfgContainer [2019-10-13 21:08:45,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:08:45,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:08:45,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:08:45,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:08:45,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:08:42" (1/3) ... [2019-10-13 21:08:45,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4d44bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:45, skipping insertion in model container [2019-10-13 21:08:45,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:08:43" (2/3) ... [2019-10-13 21:08:45,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4d44bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:08:45, skipping insertion in model container [2019-10-13 21:08:45,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:08:45" (3/3) ... [2019-10-13 21:08:45,855 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2019-10-13 21:08:45,864 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:08:45,873 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:08:45,884 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:08:45,926 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:08:45,927 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:08:45,927 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:08:45,927 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:08:45,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:08:45,927 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:08:45,927 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:08:45,927 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:08:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states. [2019-10-13 21:08:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:08:45,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:45,992 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] [2019-10-13 21:08:45,994 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2027146740, now seen corresponding path program 1 times [2019-10-13 21:08:46,010 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:46,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176007853] [2019-10-13 21:08:46,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:46,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:46,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176007853] [2019-10-13 21:08:46,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4752620] [2019-10-13 21:08:46,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:47,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:08:47,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:47,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:47,397 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:47,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 2] total 7 [2019-10-13 21:08:47,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436541248] [2019-10-13 21:08:47,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:08:47,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:08:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:47,421 INFO L87 Difference]: Start difference. First operand 851 states. Second operand 2 states. [2019-10-13 21:08:47,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:47,533 INFO L93 Difference]: Finished difference Result 1381 states and 2213 transitions. [2019-10-13 21:08:47,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:08:47,535 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 113 [2019-10-13 21:08:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:47,563 INFO L225 Difference]: With dead ends: 1381 [2019-10-13 21:08:47,564 INFO L226 Difference]: Without dead ends: 698 [2019-10-13 21:08:47,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-13 21:08:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 698. [2019-10-13 21:08:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-10-13 21:08:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1098 transitions. [2019-10-13 21:08:47,679 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1098 transitions. Word has length 113 [2019-10-13 21:08:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:47,681 INFO L462 AbstractCegarLoop]: Abstraction has 698 states and 1098 transitions. [2019-10-13 21:08:47,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:08:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1098 transitions. [2019-10-13 21:08:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:08:47,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:47,687 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] [2019-10-13 21:08:47,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:47,895 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:47,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1220182100, now seen corresponding path program 1 times [2019-10-13 21:08:47,896 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:47,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415552157] [2019-10-13 21:08:47,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:47,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:48,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415552157] [2019-10-13 21:08:48,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882012933] [2019-10-13 21:08:48,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:48,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 2884 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:48,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:48,733 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:48,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:48,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:48,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884302670] [2019-10-13 21:08:48,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:48,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:48,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:48,948 INFO L87 Difference]: Start difference. First operand 698 states and 1098 transitions. Second operand 4 states. [2019-10-13 21:08:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:49,116 INFO L93 Difference]: Finished difference Result 1379 states and 2186 transitions. [2019-10-13 21:08:49,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:49,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-10-13 21:08:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:49,126 INFO L225 Difference]: With dead ends: 1379 [2019-10-13 21:08:49,127 INFO L226 Difference]: Without dead ends: 707 [2019-10-13 21:08:49,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2019-10-13 21:08:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 707. [2019-10-13 21:08:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 707 states. [2019-10-13 21:08:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1112 transitions. [2019-10-13 21:08:49,192 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1112 transitions. Word has length 113 [2019-10-13 21:08:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:49,194 INFO L462 AbstractCegarLoop]: Abstraction has 707 states and 1112 transitions. [2019-10-13 21:08:49,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1112 transitions. [2019-10-13 21:08:49,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:08:49,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:49,200 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] [2019-10-13 21:08:49,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:49,416 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1088965156, now seen corresponding path program 1 times [2019-10-13 21:08:49,416 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:49,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593520755] [2019-10-13 21:08:49,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:49,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:49,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593520755] [2019-10-13 21:08:49,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088149111] [2019-10-13 21:08:49,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 2886 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:50,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:50,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:08:50,292 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:50,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-13 21:08:50,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720318342] [2019-10-13 21:08:50,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:50,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:50,294 INFO L87 Difference]: Start difference. First operand 707 states and 1112 transitions. Second operand 4 states. [2019-10-13 21:08:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:50,557 INFO L93 Difference]: Finished difference Result 1425 states and 2271 transitions. [2019-10-13 21:08:50,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:50,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-10-13 21:08:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:50,564 INFO L225 Difference]: With dead ends: 1425 [2019-10-13 21:08:50,564 INFO L226 Difference]: Without dead ends: 746 [2019-10-13 21:08:50,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:08:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-10-13 21:08:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2019-10-13 21:08:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-13 21:08:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1186 transitions. [2019-10-13 21:08:50,594 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1186 transitions. Word has length 115 [2019-10-13 21:08:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:50,594 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1186 transitions. [2019-10-13 21:08:50,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1186 transitions. [2019-10-13 21:08:50,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 21:08:50,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:50,597 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] [2019-10-13 21:08:50,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:50,805 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1537184166, now seen corresponding path program 1 times [2019-10-13 21:08:50,806 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:50,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375219256] [2019-10-13 21:08:50,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,807 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:50,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:50,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375219256] [2019-10-13 21:08:50,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111959351] [2019-10-13 21:08:50,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:51,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:51,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:51,727 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:51,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:51,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:51,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178049331] [2019-10-13 21:08:51,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:51,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:51,967 INFO L87 Difference]: Start difference. First operand 746 states and 1186 transitions. Second operand 7 states. [2019-10-13 21:08:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:52,127 INFO L93 Difference]: Finished difference Result 1478 states and 2362 transitions. [2019-10-13 21:08:52,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:52,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2019-10-13 21:08:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:52,134 INFO L225 Difference]: With dead ends: 1478 [2019-10-13 21:08:52,134 INFO L226 Difference]: Without dead ends: 760 [2019-10-13 21:08:52,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-10-13 21:08:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 753. [2019-10-13 21:08:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2019-10-13 21:08:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1197 transitions. [2019-10-13 21:08:52,166 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1197 transitions. Word has length 117 [2019-10-13 21:08:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:52,167 INFO L462 AbstractCegarLoop]: Abstraction has 753 states and 1197 transitions. [2019-10-13 21:08:52,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1197 transitions. [2019-10-13 21:08:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:08:52,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:52,169 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] [2019-10-13 21:08:52,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:52,376 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1752638134, now seen corresponding path program 1 times [2019-10-13 21:08:52,377 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:52,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280436456] [2019-10-13 21:08:52,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:52,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:52,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280436456] [2019-10-13 21:08:52,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258310252] [2019-10-13 21:08:52,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:53,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:53,037 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:53,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:53,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:08:53,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456705555] [2019-10-13 21:08:53,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:08:53,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:08:53,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:53,145 INFO L87 Difference]: Start difference. First operand 753 states and 1197 transitions. Second operand 4 states. [2019-10-13 21:08:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:53,236 INFO L93 Difference]: Finished difference Result 1491 states and 2382 transitions. [2019-10-13 21:08:53,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:53,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 21:08:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:53,243 INFO L225 Difference]: With dead ends: 1491 [2019-10-13 21:08:53,243 INFO L226 Difference]: Without dead ends: 764 [2019-10-13 21:08:53,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2019-10-13 21:08:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 762. [2019-10-13 21:08:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2019-10-13 21:08:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1205 transitions. [2019-10-13 21:08:53,276 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1205 transitions. Word has length 118 [2019-10-13 21:08:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:53,276 INFO L462 AbstractCegarLoop]: Abstraction has 762 states and 1205 transitions. [2019-10-13 21:08:53,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:08:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1205 transitions. [2019-10-13 21:08:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 21:08:53,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:53,279 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] [2019-10-13 21:08:53,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:53,487 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 718255648, now seen corresponding path program 1 times [2019-10-13 21:08:53,488 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:53,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208500744] [2019-10-13 21:08:53,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:53,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:53,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208500744] [2019-10-13 21:08:53,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604019866] [2019-10-13 21:08:53,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:54,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 2889 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:54,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:08:54,213 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:08:54,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:08:54,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2019-10-13 21:08:54,448 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959058015] [2019-10-13 21:08:54,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:08:54,450 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:54,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:08:54,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:08:54,453 INFO L87 Difference]: Start difference. First operand 762 states and 1205 transitions. Second operand 7 states. [2019-10-13 21:08:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:54,628 INFO L93 Difference]: Finished difference Result 1495 states and 2376 transitions. [2019-10-13 21:08:54,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:08:54,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2019-10-13 21:08:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:54,640 INFO L225 Difference]: With dead ends: 1495 [2019-10-13 21:08:54,640 INFO L226 Difference]: Without dead ends: 774 [2019-10-13 21:08:54,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:08:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-10-13 21:08:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 762. [2019-10-13 21:08:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2019-10-13 21:08:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1205 transitions. [2019-10-13 21:08:54,682 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1205 transitions. Word has length 118 [2019-10-13 21:08:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:54,682 INFO L462 AbstractCegarLoop]: Abstraction has 762 states and 1205 transitions. [2019-10-13 21:08:54,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:08:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1205 transitions. [2019-10-13 21:08:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:08:54,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:54,685 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] [2019-10-13 21:08:54,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:54,900 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -64052637, now seen corresponding path program 1 times [2019-10-13 21:08:54,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:54,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255348485] [2019-10-13 21:08:54,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:54,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:55,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255348485] [2019-10-13 21:08:55,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149360835] [2019-10-13 21:08:55,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:55,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 2891 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:55,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:55,710 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:55,818 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:55,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:55,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559745034] [2019-10-13 21:08:55,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:55,820 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:55,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:55,820 INFO L87 Difference]: Start difference. First operand 762 states and 1205 transitions. Second operand 5 states. [2019-10-13 21:08:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:55,896 INFO L93 Difference]: Finished difference Result 1471 states and 2343 transitions. [2019-10-13 21:08:55,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:55,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-10-13 21:08:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:55,902 INFO L225 Difference]: With dead ends: 1471 [2019-10-13 21:08:55,903 INFO L226 Difference]: Without dead ends: 762 [2019-10-13 21:08:55,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-10-13 21:08:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 762. [2019-10-13 21:08:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2019-10-13 21:08:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1200 transitions. [2019-10-13 21:08:55,933 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1200 transitions. Word has length 121 [2019-10-13 21:08:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:55,934 INFO L462 AbstractCegarLoop]: Abstraction has 762 states and 1200 transitions. [2019-10-13 21:08:55,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1200 transitions. [2019-10-13 21:08:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 21:08:55,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:55,936 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] [2019-10-13 21:08:56,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,143 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:56,143 INFO L82 PathProgramCache]: Analyzing trace with hash 78569715, now seen corresponding path program 1 times [2019-10-13 21:08:56,143 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:56,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813094040] [2019-10-13 21:08:56,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:56,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:56,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813094040] [2019-10-13 21:08:56,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186254128] [2019-10-13 21:08:56,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:56,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:56,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:56,848 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 21:08:57,010 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:57,010 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 7 [2019-10-13 21:08:57,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611387460] [2019-10-13 21:08:57,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:08:57,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:08:57,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:08:57,011 INFO L87 Difference]: Start difference. First operand 762 states and 1200 transitions. Second operand 5 states. [2019-10-13 21:08:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:57,220 INFO L93 Difference]: Finished difference Result 1467 states and 2334 transitions. [2019-10-13 21:08:57,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:57,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2019-10-13 21:08:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:57,226 INFO L225 Difference]: With dead ends: 1467 [2019-10-13 21:08:57,226 INFO L226 Difference]: Without dead ends: 804 [2019-10-13 21:08:57,230 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2019-10-13 21:08:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 801. [2019-10-13 21:08:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2019-10-13 21:08:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1273 transitions. [2019-10-13 21:08:57,270 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1273 transitions. Word has length 122 [2019-10-13 21:08:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:57,271 INFO L462 AbstractCegarLoop]: Abstraction has 801 states and 1273 transitions. [2019-10-13 21:08:57,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:08:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1273 transitions. [2019-10-13 21:08:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 21:08:57,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:57,274 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] [2019-10-13 21:08:57,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:57,486 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -81320279, now seen corresponding path program 1 times [2019-10-13 21:08:57,487 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:57,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540886947] [2019-10-13 21:08:57,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:57,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:57,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540886947] [2019-10-13 21:08:57,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134780989] [2019-10-13 21:08:57,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:58,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:08:58,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:58,257 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:08:58,452 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:58,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:08:58,453 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306017476] [2019-10-13 21:08:58,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:08:58,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:08:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:08:58,454 INFO L87 Difference]: Start difference. First operand 801 states and 1273 transitions. Second operand 11 states. [2019-10-13 21:08:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:58,618 INFO L93 Difference]: Finished difference Result 1487 states and 2358 transitions. [2019-10-13 21:08:58,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:08:58,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2019-10-13 21:08:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:58,626 INFO L225 Difference]: With dead ends: 1487 [2019-10-13 21:08:58,626 INFO L226 Difference]: Without dead ends: 824 [2019-10-13 21:08:58,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:08:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2019-10-13 21:08:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 808. [2019-10-13 21:08:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2019-10-13 21:08:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1282 transitions. [2019-10-13 21:08:58,674 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1282 transitions. Word has length 123 [2019-10-13 21:08:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:58,676 INFO L462 AbstractCegarLoop]: Abstraction has 808 states and 1282 transitions. [2019-10-13 21:08:58,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:08:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1282 transitions. [2019-10-13 21:08:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 21:08:58,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:58,678 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, 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] [2019-10-13 21:08:58,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:58,886 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:08:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:08:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2017871917, now seen corresponding path program 1 times [2019-10-13 21:08:58,887 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:08:58,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925379075] [2019-10-13 21:08:58,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:08:58,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:08:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:59,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925379075] [2019-10-13 21:08:59,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619874452] [2019-10-13 21:08:59,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:08:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:08:59,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 2895 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:08:59,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:08:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:08:59,655 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:08:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:08:59,762 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:08:59,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-10-13 21:08:59,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174857985] [2019-10-13 21:08:59,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:08:59,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:08:59,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:08:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:08:59,766 INFO L87 Difference]: Start difference. First operand 808 states and 1282 transitions. Second operand 6 states. [2019-10-13 21:08:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:08:59,844 INFO L93 Difference]: Finished difference Result 1529 states and 2433 transitions. [2019-10-13 21:08:59,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:08:59,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 21:08:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:08:59,850 INFO L225 Difference]: With dead ends: 1529 [2019-10-13 21:08:59,850 INFO L226 Difference]: Without dead ends: 808 [2019-10-13 21:08:59,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:08:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2019-10-13 21:08:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2019-10-13 21:08:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2019-10-13 21:08:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1279 transitions. [2019-10-13 21:08:59,889 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1279 transitions. Word has length 125 [2019-10-13 21:08:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:08:59,889 INFO L462 AbstractCegarLoop]: Abstraction has 808 states and 1279 transitions. [2019-10-13 21:08:59,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:08:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1279 transitions. [2019-10-13 21:08:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 21:08:59,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:08:59,892 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, 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] [2019-10-13 21:09:00,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,108 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 875190530, now seen corresponding path program 1 times [2019-10-13 21:09:00,108 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:00,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841701680] [2019-10-13 21:09:00,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:00,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 21:09:00,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841701680] [2019-10-13 21:09:00,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490686772] [2019-10-13 21:09:00,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:00,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 2895 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:09:00,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 21:09:00,906 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:09:01,025 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:01,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 21:09:01,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141138925] [2019-10-13 21:09:01,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:01,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:01,027 INFO L87 Difference]: Start difference. First operand 808 states and 1279 transitions. Second operand 4 states. [2019-10-13 21:09:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:02,065 INFO L93 Difference]: Finished difference Result 2747 states and 4407 transitions. [2019-10-13 21:09:02,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:02,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2019-10-13 21:09:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:02,082 INFO L225 Difference]: With dead ends: 2747 [2019-10-13 21:09:02,082 INFO L226 Difference]: Without dead ends: 2088 [2019-10-13 21:09:02,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 246 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2019-10-13 21:09:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1942. [2019-10-13 21:09:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1942 states. [2019-10-13 21:09:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3119 transitions. [2019-10-13 21:09:02,164 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3119 transitions. Word has length 126 [2019-10-13 21:09:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:02,166 INFO L462 AbstractCegarLoop]: Abstraction has 1942 states and 3119 transitions. [2019-10-13 21:09:02,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3119 transitions. [2019-10-13 21:09:02,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 21:09:02,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:02,175 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, 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] [2019-10-13 21:09:02,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:02,384 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1193387823, now seen corresponding path program 1 times [2019-10-13 21:09:02,385 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:02,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80347537] [2019-10-13 21:09:02,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:02,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:02,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80347537] [2019-10-13 21:09:02,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712785336] [2019-10-13 21:09:02,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:03,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 21:09:03,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 21:09:03,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:09:03,473 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:03,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 9 [2019-10-13 21:09:03,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815897055] [2019-10-13 21:09:03,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:03,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:03,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:03,475 INFO L87 Difference]: Start difference. First operand 1942 states and 3119 transitions. Second operand 7 states. [2019-10-13 21:09:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:04,225 INFO L93 Difference]: Finished difference Result 4385 states and 7048 transitions. [2019-10-13 21:09:04,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:09:04,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2019-10-13 21:09:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:04,242 INFO L225 Difference]: With dead ends: 4385 [2019-10-13 21:09:04,242 INFO L226 Difference]: Without dead ends: 2592 [2019-10-13 21:09:04,251 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 355 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2019-10-13 21:09:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2588. [2019-10-13 21:09:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2588 states. [2019-10-13 21:09:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 4133 transitions. [2019-10-13 21:09:04,353 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 4133 transitions. Word has length 184 [2019-10-13 21:09:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:04,354 INFO L462 AbstractCegarLoop]: Abstraction has 2588 states and 4133 transitions. [2019-10-13 21:09:04,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 4133 transitions. [2019-10-13 21:09:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-13 21:09:04,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:04,362 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, 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] [2019-10-13 21:09:04,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:04,570 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1637447604, now seen corresponding path program 1 times [2019-10-13 21:09:04,570 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:04,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144560728] [2019-10-13 21:09:04,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,571 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:04,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:04,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144560728] [2019-10-13 21:09:04,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787780474] [2019-10-13 21:09:04,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:05,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:05,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:05,405 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:05,782 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:05,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:05,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561091839] [2019-10-13 21:09:05,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:05,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:05,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:05,785 INFO L87 Difference]: Start difference. First operand 2588 states and 4133 transitions. Second operand 5 states. [2019-10-13 21:09:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:06,751 INFO L93 Difference]: Finished difference Result 5067 states and 8284 transitions. [2019-10-13 21:09:06,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:06,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-10-13 21:09:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:06,771 INFO L225 Difference]: With dead ends: 5067 [2019-10-13 21:09:06,771 INFO L226 Difference]: Without dead ends: 2628 [2019-10-13 21:09:06,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2019-10-13 21:09:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2628. [2019-10-13 21:09:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2019-10-13 21:09:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4197 transitions. [2019-10-13 21:09:06,893 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4197 transitions. Word has length 185 [2019-10-13 21:09:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:06,893 INFO L462 AbstractCegarLoop]: Abstraction has 2628 states and 4197 transitions. [2019-10-13 21:09:06,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4197 transitions. [2019-10-13 21:09:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 21:09:06,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:06,902 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, 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] [2019-10-13 21:09:07,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:07,121 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash -387871118, now seen corresponding path program 1 times [2019-10-13 21:09:07,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:07,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38951160] [2019-10-13 21:09:07,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:07,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:07,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:07,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38951160] [2019-10-13 21:09:07,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360371436] [2019-10-13 21:09:07,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:08,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:08,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:08,089 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:08,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:08,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:08,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70144113] [2019-10-13 21:09:08,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:08,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:08,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:08,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:08,440 INFO L87 Difference]: Start difference. First operand 2628 states and 4197 transitions. Second operand 5 states. [2019-10-13 21:09:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:09,338 INFO L93 Difference]: Finished difference Result 5147 states and 8399 transitions. [2019-10-13 21:09:09,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:09,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-13 21:09:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:09,359 INFO L225 Difference]: With dead ends: 5147 [2019-10-13 21:09:09,359 INFO L226 Difference]: Without dead ends: 2668 [2019-10-13 21:09:09,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 363 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2019-10-13 21:09:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2668. [2019-10-13 21:09:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2668 states. [2019-10-13 21:09:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 4261 transitions. [2019-10-13 21:09:09,473 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 4261 transitions. Word has length 187 [2019-10-13 21:09:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:09,474 INFO L462 AbstractCegarLoop]: Abstraction has 2668 states and 4261 transitions. [2019-10-13 21:09:09,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 4261 transitions. [2019-10-13 21:09:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 21:09:09,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:09,487 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, 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] [2019-10-13 21:09:09,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:09,696 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:09,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1392276364, now seen corresponding path program 1 times [2019-10-13 21:09:09,697 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:09,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278089011] [2019-10-13 21:09:09,697 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:09,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:09,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:09,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278089011] [2019-10-13 21:09:09,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047710256] [2019-10-13 21:09:09,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:10,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:10,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:10,562 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:10,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:10,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 11 [2019-10-13 21:09:10,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638719491] [2019-10-13 21:09:10,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:10,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:10,933 INFO L87 Difference]: Start difference. First operand 2668 states and 4261 transitions. Second operand 5 states. [2019-10-13 21:09:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:11,775 INFO L93 Difference]: Finished difference Result 5227 states and 8514 transitions. [2019-10-13 21:09:11,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:11,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-10-13 21:09:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:11,787 INFO L225 Difference]: With dead ends: 5227 [2019-10-13 21:09:11,787 INFO L226 Difference]: Without dead ends: 2708 [2019-10-13 21:09:11,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 367 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:09:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2019-10-13 21:09:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2708. [2019-10-13 21:09:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2708 states. [2019-10-13 21:09:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 4325 transitions. [2019-10-13 21:09:11,888 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 4325 transitions. Word has length 189 [2019-10-13 21:09:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:11,888 INFO L462 AbstractCegarLoop]: Abstraction has 2708 states and 4325 transitions. [2019-10-13 21:09:11,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 4325 transitions. [2019-10-13 21:09:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 21:09:11,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:11,896 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, 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] [2019-10-13 21:09:12,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:12,104 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:12,104 INFO L82 PathProgramCache]: Analyzing trace with hash 635456810, now seen corresponding path program 1 times [2019-10-13 21:09:12,105 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:12,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759819105] [2019-10-13 21:09:12,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,105 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:12,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:12,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759819105] [2019-10-13 21:09:12,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602251929] [2019-10-13 21:09:12,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:12,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 3273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:09:12,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:09:12,903 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:09:13,351 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:13,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 6] total 10 [2019-10-13 21:09:13,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756902191] [2019-10-13 21:09:13,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:09:13,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:09:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:09:13,354 INFO L87 Difference]: Start difference. First operand 2708 states and 4325 transitions. Second operand 5 states. [2019-10-13 21:09:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:14,196 INFO L93 Difference]: Finished difference Result 5307 states and 8629 transitions. [2019-10-13 21:09:14,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:09:14,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2019-10-13 21:09:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:14,217 INFO L225 Difference]: With dead ends: 5307 [2019-10-13 21:09:14,217 INFO L226 Difference]: Without dead ends: 2748 [2019-10-13 21:09:14,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 371 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:09:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2019-10-13 21:09:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2748. [2019-10-13 21:09:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2748 states. [2019-10-13 21:09:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 4389 transitions. [2019-10-13 21:09:14,315 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 4389 transitions. Word has length 191 [2019-10-13 21:09:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:14,316 INFO L462 AbstractCegarLoop]: Abstraction has 2748 states and 4389 transitions. [2019-10-13 21:09:14,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:09:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 4389 transitions. [2019-10-13 21:09:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-13 21:09:14,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:14,324 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, 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] [2019-10-13 21:09:14,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:14,532 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash -563212492, now seen corresponding path program 1 times [2019-10-13 21:09:14,533 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:14,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955511403] [2019-10-13 21:09:14,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:14,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:14,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955511403] [2019-10-13 21:09:14,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560025780] [2019-10-13 21:09:14,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:15,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 3275 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:09:15,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:09:15,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:15,440 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:15,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 21:09:15,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837273343] [2019-10-13 21:09:15,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:15,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:15,441 INFO L87 Difference]: Start difference. First operand 2748 states and 4389 transitions. Second operand 4 states. [2019-10-13 21:09:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:15,603 INFO L93 Difference]: Finished difference Result 5455 states and 8742 transitions. [2019-10-13 21:09:15,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:15,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 193 [2019-10-13 21:09:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:15,618 INFO L225 Difference]: With dead ends: 5455 [2019-10-13 21:09:15,618 INFO L226 Difference]: Without dead ends: 2725 [2019-10-13 21:09:15,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:09:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2019-10-13 21:09:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2725. [2019-10-13 21:09:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2725 states. [2019-10-13 21:09:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 4342 transitions. [2019-10-13 21:09:15,709 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 4342 transitions. Word has length 193 [2019-10-13 21:09:15,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:15,709 INFO L462 AbstractCegarLoop]: Abstraction has 2725 states and 4342 transitions. [2019-10-13 21:09:15,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 4342 transitions. [2019-10-13 21:09:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 21:09:15,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:15,717 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:15,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:15,934 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1296795919, now seen corresponding path program 1 times [2019-10-13 21:09:15,936 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:15,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410388138] [2019-10-13 21:09:15,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:15,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:16,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410388138] [2019-10-13 21:09:16,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005471979] [2019-10-13 21:09:16,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:16,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:16,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:09:16,760 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:16,994 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:16,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2019-10-13 21:09:16,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565659066] [2019-10-13 21:09:16,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:16,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:16,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:16,995 INFO L87 Difference]: Start difference. First operand 2725 states and 4342 transitions. Second operand 7 states. [2019-10-13 21:09:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:17,142 INFO L93 Difference]: Finished difference Result 5424 states and 8643 transitions. [2019-10-13 21:09:17,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:17,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 191 [2019-10-13 21:09:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:17,156 INFO L225 Difference]: With dead ends: 5424 [2019-10-13 21:09:17,157 INFO L226 Difference]: Without dead ends: 2747 [2019-10-13 21:09:17,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 372 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2019-10-13 21:09:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2719. [2019-10-13 21:09:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2719 states. [2019-10-13 21:09:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4328 transitions. [2019-10-13 21:09:17,240 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4328 transitions. Word has length 191 [2019-10-13 21:09:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:17,241 INFO L462 AbstractCegarLoop]: Abstraction has 2719 states and 4328 transitions. [2019-10-13 21:09:17,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4328 transitions. [2019-10-13 21:09:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 21:09:17,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:17,249 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:17,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:17,457 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:17,458 INFO L82 PathProgramCache]: Analyzing trace with hash 352225041, now seen corresponding path program 1 times [2019-10-13 21:09:17,458 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:17,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731927775] [2019-10-13 21:09:17,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:17,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY