java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:08:17,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:08:17,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:08:17,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:08:17,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:08:17,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:08:17,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:08:17,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:08:17,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:08:17,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:08:17,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:08:17,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:08:17,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:08:17,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:08:17,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:08:17,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:08:17,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:08:17,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:08:17,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:08:17,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:08:17,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:08:17,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:08:17,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:08:17,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:08:17,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:08:17,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:08:17,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:08:17,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:08:17,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:08:17,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:08:17,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:08:17,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:08:17,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:08:17,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:08:17,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:08:17,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:08:17,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:08:17,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:08:17,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:08:17,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:08:17,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:08:17,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:08:17,480 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:08:17,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:08:17,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:08:17,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:08:17,482 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:08:17,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:08:17,483 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:08:17,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:08:17,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:08:17,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:08:17,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:08:17,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:08:17,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:08:17,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:08:17,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:08:17,485 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:08:17,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:08:17,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:08:17,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:08:17,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:08:17,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:08:17,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:17,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:08:17,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:08:17,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:08:17,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:08:17,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:08:17,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:08:17,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:08:17,781 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:08:17,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:08:17,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:08:17,807 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:08:17,807 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:08:17,808 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c [2019-10-15 01:08:17,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da440601a/8652fbd7346c494abfe3afca9b1711d2/FLAGf05a94651 [2019-10-15 01:08:18,595 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:08:18,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product03.cil.c [2019-10-15 01:08:18,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da440601a/8652fbd7346c494abfe3afca9b1711d2/FLAGf05a94651 [2019-10-15 01:08:18,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da440601a/8652fbd7346c494abfe3afca9b1711d2 [2019-10-15 01:08:18,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:08:18,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:08:18,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:18,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:08:18,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:08:18,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:18" (1/1) ... [2019-10-15 01:08:18,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cde57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:18, skipping insertion in model container [2019-10-15 01:08:18,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:08:18" (1/1) ... [2019-10-15 01:08:18,774 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:08:18,879 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:08:19,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:19,727 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:08:19,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:08:19,961 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:08:19,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19 WrapperNode [2019-10-15 01:08:19,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:08:19,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:08:19,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:08:19,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:08:19,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:19,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:20,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:20,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:20,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:20,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:20,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... [2019-10-15 01:08:20,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:08:20,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:08:20,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:08:20,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:08:20,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:08:20,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:08:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:08:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:08:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:08:20,242 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:08:20,243 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:08:20,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:20,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:20,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:20,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:08:20,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:08:20,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:08:20,245 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:08:20,246 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:08:20,246 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:08:20,249 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:08:20,249 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:08:20,250 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:08:20,250 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:08:20,250 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:08:20,252 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:08:20,253 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:08:20,253 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:08:20,253 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:08:20,255 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:08:20,255 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:08:20,255 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:08:20,255 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:08:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:08:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__base [2019-10-15 01:08:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:08:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:08:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:08:20,256 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-10-15 01:08:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:08:20,257 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:08:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:08:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:08:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:08:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:08:20,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:08:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:20,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:08:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:08:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:08:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:08:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:08:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:08:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:08:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:08:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:08:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:08:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:08:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:08:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:08:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:08:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:08:20,262 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:08:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:08:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:08:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:08:20,263 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:08:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:08:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:08:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:08:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:08:20,264 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:08:20,265 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:08:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:08:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:08:20,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:08:20,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:08:20,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:08:20,267 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:08:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:08:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:08:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:08:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:08:20,268 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:08:20,269 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:08:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:08:20,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:08:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:08:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:08:20,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:08:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:08:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:08:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:08:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:08:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:08:20,272 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:08:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:08:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:08:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:08:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:08:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:08:20,273 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:08:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:08:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:08:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:08:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:08:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:08:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:08:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:08:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:08:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:08:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:08:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:08:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:08:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:08:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:08:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:08:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:08:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:08:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:08:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:08:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:08:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:08:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:08:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:08:20,279 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:08:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:08:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:08:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:08:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:08:20,280 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:08:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:08:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:08:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:08:20,281 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__base [2019-10-15 01:08:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:08:20,282 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:08:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2019-10-15 01:08:20,286 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:08:20,287 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:08:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:08:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-15 01:08:20,288 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:08:20,289 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:08:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-15 01:08:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-15 01:08:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-15 01:08:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:08:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:08:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:08:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:08:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:08:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:08:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:08:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:08:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:08:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:08:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:08:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:08:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:08:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:08:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:08:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:08:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:08:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:08:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:08:20,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:08:22,851 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:08:22,852 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:08:22,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:22 BoogieIcfgContainer [2019-10-15 01:08:22,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:08:22,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:08:22,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:08:22,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:08:22,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:08:18" (1/3) ... [2019-10-15 01:08:22,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472d7778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:22, skipping insertion in model container [2019-10-15 01:08:22,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:08:19" (2/3) ... [2019-10-15 01:08:22,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472d7778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:08:22, skipping insertion in model container [2019-10-15 01:08:22,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:08:22" (3/3) ... [2019-10-15 01:08:22,864 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2019-10-15 01:08:22,877 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:08:22,889 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:08:22,901 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:08:22,949 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:08:22,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:08:22,949 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:08:22,949 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:08:22,949 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:08:22,950 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:08:22,950 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:08:22,950 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:08:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states. [2019-10-15 01:08:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 01:08:23,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:23,031 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:23,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1215975064, now seen corresponding path program 1 times [2019-10-15 01:08:23,051 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:23,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588611146] [2019-10-15 01:08:23,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:23,052 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:23,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:23,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588611146] [2019-10-15 01:08:23,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039281637] [2019-10-15 01:08:23,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:24,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 3256 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 01:08:24,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:08:24,695 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:08:24,972 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:24,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-15 01:08:24,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269075885] [2019-10-15 01:08:24,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:08:24,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:08:24,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:24,998 INFO L87 Difference]: Start difference. First operand 750 states. Second operand 2 states. [2019-10-15 01:08:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:25,068 INFO L93 Difference]: Finished difference Result 633 states and 1010 transitions. [2019-10-15 01:08:25,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:08:25,070 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-15 01:08:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:25,098 INFO L225 Difference]: With dead ends: 633 [2019-10-15 01:08:25,098 INFO L226 Difference]: Without dead ends: 596 [2019-10-15 01:08:25,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:08:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-10-15 01:08:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2019-10-15 01:08:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2019-10-15 01:08:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 955 transitions. [2019-10-15 01:08:25,211 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 955 transitions. Word has length 164 [2019-10-15 01:08:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:25,215 INFO L462 AbstractCegarLoop]: Abstraction has 596 states and 955 transitions. [2019-10-15 01:08:25,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:08:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 955 transitions. [2019-10-15 01:08:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:08:25,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:25,230 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:25,447 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512037, now seen corresponding path program 1 times [2019-10-15 01:08:25,448 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:25,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520084926] [2019-10-15 01:08:25,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:25,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:25,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:25,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520084926] [2019-10-15 01:08:25,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822292835] [2019-10-15 01:08:25,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:26,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 3259 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:26,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:08:26,362 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:08:26,658 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:26,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:08:26,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400469997] [2019-10-15 01:08:26,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:08:26,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:08:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:08:26,665 INFO L87 Difference]: Start difference. First operand 596 states and 955 transitions. Second operand 3 states. [2019-10-15 01:08:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:26,839 INFO L93 Difference]: Finished difference Result 1565 states and 2548 transitions. [2019-10-15 01:08:26,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:08:26,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-10-15 01:08:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:26,873 INFO L225 Difference]: With dead ends: 1565 [2019-10-15 01:08:26,874 INFO L226 Difference]: Without dead ends: 1078 [2019-10-15 01:08:26,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:08:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2019-10-15 01:08:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1056. [2019-10-15 01:08:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-10-15 01:08:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1715 transitions. [2019-10-15 01:08:26,996 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1715 transitions. Word has length 166 [2019-10-15 01:08:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:26,998 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1715 transitions. [2019-10-15 01:08:26,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:08:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1715 transitions. [2019-10-15 01:08:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:08:27,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:27,009 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:27,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:27,219 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2049855385, now seen corresponding path program 1 times [2019-10-15 01:08:27,219 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:27,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063359364] [2019-10-15 01:08:27,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:27,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:27,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:27,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063359364] [2019-10-15 01:08:27,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755157482] [2019-10-15 01:08:27,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:28,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:28,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:28,111 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:28,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:28,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:28,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4938469] [2019-10-15 01:08:28,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:28,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:28,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:28,440 INFO L87 Difference]: Start difference. First operand 1056 states and 1715 transitions. Second operand 4 states. [2019-10-15 01:08:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:28,545 INFO L93 Difference]: Finished difference Result 2084 states and 3403 transitions. [2019-10-15 01:08:28,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:28,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-15 01:08:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:28,556 INFO L225 Difference]: With dead ends: 2084 [2019-10-15 01:08:28,556 INFO L226 Difference]: Without dead ends: 1056 [2019-10-15 01:08:28,562 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-10-15 01:08:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2019-10-15 01:08:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-10-15 01:08:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1714 transitions. [2019-10-15 01:08:28,628 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1714 transitions. Word has length 166 [2019-10-15 01:08:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:28,629 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1714 transitions. [2019-10-15 01:08:28,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1714 transitions. [2019-10-15 01:08:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-15 01:08:28,637 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:28,638 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:28,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:28,846 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:28,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1271242485, now seen corresponding path program 1 times [2019-10-15 01:08:28,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:28,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629891737] [2019-10-15 01:08:28,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:28,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:28,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:28,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629891737] [2019-10-15 01:08:28,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212888113] [2019-10-15 01:08:28,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:29,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 3262 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:29,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:29,662 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:30,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:30,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:30,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041724308] [2019-10-15 01:08:30,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:30,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:30,030 INFO L87 Difference]: Start difference. First operand 1056 states and 1714 transitions. Second operand 4 states. [2019-10-15 01:08:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:30,130 INFO L93 Difference]: Finished difference Result 2084 states and 3401 transitions. [2019-10-15 01:08:30,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:30,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-15 01:08:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:30,147 INFO L225 Difference]: With dead ends: 2084 [2019-10-15 01:08:30,147 INFO L226 Difference]: Without dead ends: 1056 [2019-10-15 01:08:30,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-10-15 01:08:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2019-10-15 01:08:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2019-10-15 01:08:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1713 transitions. [2019-10-15 01:08:30,211 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1713 transitions. Word has length 168 [2019-10-15 01:08:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:30,212 INFO L462 AbstractCegarLoop]: Abstraction has 1056 states and 1713 transitions. [2019-10-15 01:08:30,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1713 transitions. [2019-10-15 01:08:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-15 01:08:30,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:30,217 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:30,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:30,427 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash -618683487, now seen corresponding path program 1 times [2019-10-15 01:08:30,428 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:30,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163600448] [2019-10-15 01:08:30,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:30,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:30,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:30,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163600448] [2019-10-15 01:08:30,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823026142] [2019-10-15 01:08:30,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:31,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:31,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:31,653 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:31,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:31,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:31,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443671564] [2019-10-15 01:08:31,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:31,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:31,948 INFO L87 Difference]: Start difference. First operand 1056 states and 1713 transitions. Second operand 4 states. [2019-10-15 01:08:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:32,044 INFO L93 Difference]: Finished difference Result 2091 states and 3408 transitions. [2019-10-15 01:08:32,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:32,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-15 01:08:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:32,054 INFO L225 Difference]: With dead ends: 2091 [2019-10-15 01:08:32,054 INFO L226 Difference]: Without dead ends: 1065 [2019-10-15 01:08:32,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-15 01:08:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-15 01:08:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-15 01:08:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1725 transitions. [2019-10-15 01:08:32,112 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1725 transitions. Word has length 170 [2019-10-15 01:08:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:32,113 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1725 transitions. [2019-10-15 01:08:32,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1725 transitions. [2019-10-15 01:08:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:08:32,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:32,121 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:32,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:32,329 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1482424208, now seen corresponding path program 1 times [2019-10-15 01:08:32,329 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:32,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966907157] [2019-10-15 01:08:32,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:32,330 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:32,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:32,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966907157] [2019-10-15 01:08:32,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449532975] [2019-10-15 01:08:32,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:33,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 3265 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:33,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:33,176 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:33,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:33,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-15 01:08:33,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260115376] [2019-10-15 01:08:33,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:33,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:33,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:33,446 INFO L87 Difference]: Start difference. First operand 1065 states and 1725 transitions. Second operand 4 states. [2019-10-15 01:08:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:33,552 INFO L93 Difference]: Finished difference Result 2093 states and 3409 transitions. [2019-10-15 01:08:33,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:33,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-15 01:08:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:33,562 INFO L225 Difference]: With dead ends: 2093 [2019-10-15 01:08:33,563 INFO L226 Difference]: Without dead ends: 1065 [2019-10-15 01:08:33,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:08:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-15 01:08:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-15 01:08:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-15 01:08:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1724 transitions. [2019-10-15 01:08:33,608 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1724 transitions. Word has length 171 [2019-10-15 01:08:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:33,608 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1724 transitions. [2019-10-15 01:08:33,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1724 transitions. [2019-10-15 01:08:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-15 01:08:33,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:33,614 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:33,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:33,825 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1945680261, now seen corresponding path program 1 times [2019-10-15 01:08:33,826 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:33,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445550412] [2019-10-15 01:08:33,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:33,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:33,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:33,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445550412] [2019-10-15 01:08:33,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149612229] [2019-10-15 01:08:33,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:34,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:34,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:34,775 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:35,110 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:35,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:35,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389083936] [2019-10-15 01:08:35,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:35,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:35,113 INFO L87 Difference]: Start difference. First operand 1065 states and 1724 transitions. Second operand 4 states. [2019-10-15 01:08:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:35,217 INFO L93 Difference]: Finished difference Result 2093 states and 3408 transitions. [2019-10-15 01:08:35,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:35,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-15 01:08:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:35,226 INFO L225 Difference]: With dead ends: 2093 [2019-10-15 01:08:35,226 INFO L226 Difference]: Without dead ends: 1065 [2019-10-15 01:08:35,231 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-15 01:08:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-15 01:08:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-15 01:08:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1723 transitions. [2019-10-15 01:08:35,273 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1723 transitions. Word has length 172 [2019-10-15 01:08:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:35,273 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1723 transitions. [2019-10-15 01:08:35,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1723 transitions. [2019-10-15 01:08:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-15 01:08:35,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:35,279 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:35,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:35,487 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash 982032148, now seen corresponding path program 1 times [2019-10-15 01:08:35,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:35,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579484063] [2019-10-15 01:08:35,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:35,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:35,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:35,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579484063] [2019-10-15 01:08:35,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101924120] [2019-10-15 01:08:35,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:36,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:36,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:36,493 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:36,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:36,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:08:36,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696981247] [2019-10-15 01:08:36,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:36,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:36,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:36,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:36,899 INFO L87 Difference]: Start difference. First operand 1065 states and 1723 transitions. Second operand 4 states. [2019-10-15 01:08:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:37,162 INFO L93 Difference]: Finished difference Result 2092 states and 3408 transitions. [2019-10-15 01:08:37,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:37,163 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-15 01:08:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:37,176 INFO L225 Difference]: With dead ends: 2092 [2019-10-15 01:08:37,176 INFO L226 Difference]: Without dead ends: 1065 [2019-10-15 01:08:37,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-15 01:08:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-15 01:08:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-15 01:08:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1718 transitions. [2019-10-15 01:08:37,333 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1718 transitions. Word has length 173 [2019-10-15 01:08:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:37,334 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1718 transitions. [2019-10-15 01:08:37,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1718 transitions. [2019-10-15 01:08:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:08:37,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:37,340 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:37,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:37,551 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:37,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1458586870, now seen corresponding path program 1 times [2019-10-15 01:08:37,552 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:37,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069697361] [2019-10-15 01:08:37,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:37,552 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:37,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:37,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069697361] [2019-10-15 01:08:37,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290784078] [2019-10-15 01:08:37,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:38,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 3269 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:38,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:38,500 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:38,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:38,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:08:38,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094649793] [2019-10-15 01:08:38,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:38,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:38,843 INFO L87 Difference]: Start difference. First operand 1065 states and 1718 transitions. Second operand 4 states. [2019-10-15 01:08:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:39,030 INFO L93 Difference]: Finished difference Result 2092 states and 3398 transitions. [2019-10-15 01:08:39,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:08:39,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-15 01:08:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:39,039 INFO L225 Difference]: With dead ends: 2092 [2019-10-15 01:08:39,040 INFO L226 Difference]: Without dead ends: 1065 [2019-10-15 01:08:39,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2019-10-15 01:08:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2019-10-15 01:08:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-10-15 01:08:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1713 transitions. [2019-10-15 01:08:39,088 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1713 transitions. Word has length 175 [2019-10-15 01:08:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:39,088 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1713 transitions. [2019-10-15 01:08:39,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1713 transitions. [2019-10-15 01:08:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 01:08:39,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:39,094 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:39,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:39,311 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:39,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:39,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1544496906, now seen corresponding path program 1 times [2019-10-15 01:08:39,311 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:39,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69925035] [2019-10-15 01:08:39,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:39,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:39,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:39,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69925035] [2019-10-15 01:08:39,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938838824] [2019-10-15 01:08:39,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:40,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 3271 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:40,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:40,409 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:40,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:40,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:08:40,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250213672] [2019-10-15 01:08:40,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:40,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:40,707 INFO L87 Difference]: Start difference. First operand 1065 states and 1713 transitions. Second operand 4 states. [2019-10-15 01:08:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:40,926 INFO L93 Difference]: Finished difference Result 2128 states and 3447 transitions. [2019-10-15 01:08:40,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:40,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-15 01:08:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:40,937 INFO L225 Difference]: With dead ends: 2128 [2019-10-15 01:08:40,938 INFO L226 Difference]: Without dead ends: 1104 [2019-10-15 01:08:40,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-10-15 01:08:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-10-15 01:08:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-10-15 01:08:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1777 transitions. [2019-10-15 01:08:40,985 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1777 transitions. Word has length 177 [2019-10-15 01:08:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:40,985 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1777 transitions. [2019-10-15 01:08:40,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1777 transitions. [2019-10-15 01:08:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:08:40,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:40,996 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:41,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:41,205 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 488245515, now seen corresponding path program 1 times [2019-10-15 01:08:41,207 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:41,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345729818] [2019-10-15 01:08:41,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:41,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:41,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:41,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345729818] [2019-10-15 01:08:41,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991621648] [2019-10-15 01:08:41,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:42,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:42,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:42,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:42,492 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:42,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 14 [2019-10-15 01:08:42,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868654755] [2019-10-15 01:08:42,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:42,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:42,495 INFO L87 Difference]: Start difference. First operand 1104 states and 1777 transitions. Second operand 4 states. [2019-10-15 01:08:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:42,712 INFO L93 Difference]: Finished difference Result 2131 states and 3450 transitions. [2019-10-15 01:08:42,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:42,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 178 [2019-10-15 01:08:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:42,721 INFO L225 Difference]: With dead ends: 2131 [2019-10-15 01:08:42,721 INFO L226 Difference]: Without dead ends: 1104 [2019-10-15 01:08:42,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:08:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2019-10-15 01:08:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2019-10-15 01:08:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-10-15 01:08:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1772 transitions. [2019-10-15 01:08:42,764 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1772 transitions. Word has length 178 [2019-10-15 01:08:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:42,764 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1772 transitions. [2019-10-15 01:08:42,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1772 transitions. [2019-10-15 01:08:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:08:42,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:42,769 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:42,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:42,979 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash -293802614, now seen corresponding path program 1 times [2019-10-15 01:08:42,980 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:42,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179254313] [2019-10-15 01:08:42,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:42,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:42,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:43,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179254313] [2019-10-15 01:08:43,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866713110] [2019-10-15 01:08:43,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:43,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 3268 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:08:43,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:44,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:44,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:08:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:08:44,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:44,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-15 01:08:44,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695206841] [2019-10-15 01:08:44,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:08:44,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:08:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:08:44,958 INFO L87 Difference]: Start difference. First operand 1104 states and 1772 transitions. Second operand 9 states. [2019-10-15 01:08:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:45,232 INFO L93 Difference]: Finished difference Result 2144 states and 3464 transitions. [2019-10-15 01:08:45,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:08:45,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-15 01:08:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:45,241 INFO L225 Difference]: With dead ends: 2144 [2019-10-15 01:08:45,241 INFO L226 Difference]: Without dead ends: 1120 [2019-10-15 01:08:45,246 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:08:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-15 01:08:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1113. [2019-10-15 01:08:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2019-10-15 01:08:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1785 transitions. [2019-10-15 01:08:45,295 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1785 transitions. Word has length 178 [2019-10-15 01:08:45,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:45,296 INFO L462 AbstractCegarLoop]: Abstraction has 1113 states and 1785 transitions. [2019-10-15 01:08:45,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:08:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1785 transitions. [2019-10-15 01:08:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-15 01:08:45,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:45,303 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:45,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:45,512 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 892032838, now seen corresponding path program 1 times [2019-10-15 01:08:45,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:45,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438174364] [2019-10-15 01:08:45,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:45,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:45,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:08:45,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438174364] [2019-10-15 01:08:45,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096976777] [2019-10-15 01:08:45,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:46,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:08:46,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:08:46,518 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:08:46,803 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:08:46,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-15 01:08:46,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338367341] [2019-10-15 01:08:46,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:08:46,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:08:46,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:08:46,805 INFO L87 Difference]: Start difference. First operand 1113 states and 1785 transitions. Second operand 4 states. [2019-10-15 01:08:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:46,988 INFO L93 Difference]: Finished difference Result 2145 states and 3467 transitions. [2019-10-15 01:08:46,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:08:46,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-15 01:08:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:46,997 INFO L225 Difference]: With dead ends: 2145 [2019-10-15 01:08:46,997 INFO L226 Difference]: Without dead ends: 1113 [2019-10-15 01:08:47,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:08:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-10-15 01:08:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2019-10-15 01:08:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2019-10-15 01:08:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1780 transitions. [2019-10-15 01:08:47,044 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1780 transitions. Word has length 179 [2019-10-15 01:08:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:47,044 INFO L462 AbstractCegarLoop]: Abstraction has 1113 states and 1780 transitions. [2019-10-15 01:08:47,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:08:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1780 transitions. [2019-10-15 01:08:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:08:47,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:47,049 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:47,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:47,258 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1583466281, now seen corresponding path program 1 times [2019-10-15 01:08:47,258 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:47,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518576827] [2019-10-15 01:08:47,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:47,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:47,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:47,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518576827] [2019-10-15 01:08:47,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393457183] [2019-10-15 01:08:47,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:48,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 3267 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:48,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:48,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:48,739 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:48,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-15 01:08:48,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697029792] [2019-10-15 01:08:48,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:08:48,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:08:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:08:48,742 INFO L87 Difference]: Start difference. First operand 1113 states and 1780 transitions. Second operand 11 states. [2019-10-15 01:08:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:08:48,894 INFO L93 Difference]: Finished difference Result 2082 states and 3361 transitions. [2019-10-15 01:08:48,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:08:48,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 178 [2019-10-15 01:08:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:08:48,905 INFO L225 Difference]: With dead ends: 2082 [2019-10-15 01:08:48,905 INFO L226 Difference]: Without dead ends: 1130 [2019-10-15 01:08:48,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:08:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2019-10-15 01:08:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1120. [2019-10-15 01:08:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2019-10-15 01:08:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1790 transitions. [2019-10-15 01:08:48,956 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1790 transitions. Word has length 178 [2019-10-15 01:08:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:08:48,957 INFO L462 AbstractCegarLoop]: Abstraction has 1120 states and 1790 transitions. [2019-10-15 01:08:48,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:08:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1790 transitions. [2019-10-15 01:08:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 01:08:48,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:08:48,962 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:08:49,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:49,172 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:08:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:08:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1256046255, now seen corresponding path program 1 times [2019-10-15 01:08:49,172 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:08:49,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481918512] [2019-10-15 01:08:49,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:49,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:08:49,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:08:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 01:08:49,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481918512] [2019-10-15 01:08:49,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212662558] [2019-10-15 01:08:49,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:08:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:08:50,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 3274 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:08:50,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:08:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:50,179 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:08:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:08:50,579 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:08:50,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 10 [2019-10-15 01:08:50,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891091658] [2019-10-15 01:08:50,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:08:50,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:08:50,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:08:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:08:50,581 INFO L87 Difference]: Start difference. First operand 1120 states and 1790 transitions. Second operand 8 states.