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_product23.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:44,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:44,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:44,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:44,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:44,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:44,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:44,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:44,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:44,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:44,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:44,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:44,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:44,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:44,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:44,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:44,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:44,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:44,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:44,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:44,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:44,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:44,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:44,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:44,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:44,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:44,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:44,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:44,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:44,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:44,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:44,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:44,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:44,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:44,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:44,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:44,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:44,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:44,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:44,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:44,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:44,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:44,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:44,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:44,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:44,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:44,614 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:44,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:44,616 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:44,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:44,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:44,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:44,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:44,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:44,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:44,618 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:44,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:44,618 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:44,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:44,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:44,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:44,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:44,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:44,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:44,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:44,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:44,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:44,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:44,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:44,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:44,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:09:44,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:44,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:44,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:44,906 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:44,906 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:44,907 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product23.cil.c [2019-10-13 21:09:44,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0896e53b1/382dd23129ee425ba1e23c4183c8ccb3/FLAG56e2914b4 [2019-10-13 21:09:45,612 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:45,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product23.cil.c [2019-10-13 21:09:45,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0896e53b1/382dd23129ee425ba1e23c4183c8ccb3/FLAG56e2914b4 [2019-10-13 21:09:45,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0896e53b1/382dd23129ee425ba1e23c4183c8ccb3 [2019-10-13 21:09:45,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:45,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:45,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:45,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:45,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:45,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4caf3c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:45, skipping insertion in model container [2019-10-13 21:09:45,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:45" (1/1) ... [2019-10-13 21:09:45,889 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:45,960 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:46,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:46,637 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:46,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:46,942 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:46,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46 WrapperNode [2019-10-13 21:09:46,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:46,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:46,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:46,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:46,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:46,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:47,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:47,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:47,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... [2019-10-13 21:09:47,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:47,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:47,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:47,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:47,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:47,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:47,246 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:47,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:47,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:47,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:47,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:47,249 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:47,250 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:47,250 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:47,250 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:47,250 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:47,251 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:47,252 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:47,253 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:47,254 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:47,255 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:47,256 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:47,256 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:09:47,256 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:47,256 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:09:47,256 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:47,258 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:47,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:47,258 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:47,258 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:47,258 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:09:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:09:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:47,261 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:47,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:09:47,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:09:47,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:47,261 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:47,261 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:47,271 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:47,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:47,275 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:09:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:09:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:09:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:09:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:09:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:09:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:49,503 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:49,503 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:49,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:49 BoogieIcfgContainer [2019-10-13 21:09:49,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:49,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:49,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:49,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:49,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:45" (1/3) ... [2019-10-13 21:09:49,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c9564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:49, skipping insertion in model container [2019-10-13 21:09:49,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:46" (2/3) ... [2019-10-13 21:09:49,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c9564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:49, skipping insertion in model container [2019-10-13 21:09:49,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:49" (3/3) ... [2019-10-13 21:09:49,513 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product23.cil.c [2019-10-13 21:09:49,523 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:49,531 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:49,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:49,572 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:49,572 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:49,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:49,573 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:49,573 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:49,573 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:49,573 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:49,573 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states. [2019-10-13 21:09:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 21:09:49,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:49,640 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] [2019-10-13 21:09:49,642 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 253029278, now seen corresponding path program 1 times [2019-10-13 21:09:49,658 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59232826] [2019-10-13 21:09:49,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:50,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59232826] [2019-10-13 21:09:50,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345033] [2019-10-13 21:09:50,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:51,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:51,144 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:51,602 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:51,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:51,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770286777] [2019-10-13 21:09:51,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:51,613 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:51,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:51,630 INFO L87 Difference]: Start difference. First operand 802 states. Second operand 2 states. [2019-10-13 21:09:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:51,717 INFO L93 Difference]: Finished difference Result 685 states and 1081 transitions. [2019-10-13 21:09:51,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:51,718 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 164 [2019-10-13 21:09:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:51,756 INFO L225 Difference]: With dead ends: 685 [2019-10-13 21:09:51,756 INFO L226 Difference]: Without dead ends: 648 [2019-10-13 21:09:51,762 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 [2019-10-13 21:09:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2019-10-13 21:09:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2019-10-13 21:09:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2019-10-13 21:09:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1026 transitions. [2019-10-13 21:09:51,900 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1026 transitions. Word has length 164 [2019-10-13 21:09:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:51,903 INFO L462 AbstractCegarLoop]: Abstraction has 648 states and 1026 transitions. [2019-10-13 21:09:51,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1026 transitions. [2019-10-13 21:09:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:51,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:51,921 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] [2019-10-13 21:09:52,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:52,125 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash 398552141, now seen corresponding path program 1 times [2019-10-13 21:09:52,126 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:52,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460883863] [2019-10-13 21:09:52,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:52,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:52,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460883863] [2019-10-13 21:09:52,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956614519] [2019-10-13 21:09:52,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:53,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 3289 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:53,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 21:09:53,107 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 21:09:53,364 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:53,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 21:09:53,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502303171] [2019-10-13 21:09:53,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:09:53,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:53,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:09:53,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:09:53,375 INFO L87 Difference]: Start difference. First operand 648 states and 1026 transitions. Second operand 3 states. [2019-10-13 21:09:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:53,583 INFO L93 Difference]: Finished difference Result 1721 states and 2761 transitions. [2019-10-13 21:09:53,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:09:53,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-10-13 21:09:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:53,603 INFO L225 Difference]: With dead ends: 1721 [2019-10-13 21:09:53,603 INFO L226 Difference]: Without dead ends: 1182 [2019-10-13 21:09:53,613 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 [2019-10-13 21:09:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2019-10-13 21:09:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1160. [2019-10-13 21:09:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2019-10-13 21:09:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1857 transitions. [2019-10-13 21:09:53,693 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1857 transitions. Word has length 166 [2019-10-13 21:09:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:53,694 INFO L462 AbstractCegarLoop]: Abstraction has 1160 states and 1857 transitions. [2019-10-13 21:09:53,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:09:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1857 transitions. [2019-10-13 21:09:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 21:09:53,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:53,701 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] [2019-10-13 21:09:53,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:53,909 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:53,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1100152015, now seen corresponding path program 1 times [2019-10-13 21:09:53,910 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:53,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49115223] [2019-10-13 21:09:53,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:53,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:54,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49115223] [2019-10-13 21:09:54,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128590041] [2019-10-13 21:09:54,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:54,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 3288 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:54,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:54,895 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:55,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:55,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:55,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819740279] [2019-10-13 21:09:55,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:55,170 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:55,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:55,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:55,171 INFO L87 Difference]: Start difference. First operand 1160 states and 1857 transitions. Second operand 4 states. [2019-10-13 21:09:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:55,271 INFO L93 Difference]: Finished difference Result 2292 states and 3687 transitions. [2019-10-13 21:09:55,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:55,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-10-13 21:09:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:55,282 INFO L225 Difference]: With dead ends: 2292 [2019-10-13 21:09:55,282 INFO L226 Difference]: Without dead ends: 1160 [2019-10-13 21:09:55,288 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 [2019-10-13 21:09:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2019-10-13 21:09:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1160. [2019-10-13 21:09:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2019-10-13 21:09:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1856 transitions. [2019-10-13 21:09:55,362 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1856 transitions. Word has length 166 [2019-10-13 21:09:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:55,362 INFO L462 AbstractCegarLoop]: Abstraction has 1160 states and 1856 transitions. [2019-10-13 21:09:55,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1856 transitions. [2019-10-13 21:09:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 21:09:55,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:55,370 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] [2019-10-13 21:09:55,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:55,581 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1455253617, now seen corresponding path program 1 times [2019-10-13 21:09:55,582 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:55,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230478037] [2019-10-13 21:09:55,583 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,584 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:55,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:55,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230478037] [2019-10-13 21:09:55,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467792130] [2019-10-13 21:09:55,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:56,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:56,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:56,457 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:56,710 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:56,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:56,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115898204] [2019-10-13 21:09:56,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:56,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:56,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:56,713 INFO L87 Difference]: Start difference. First operand 1160 states and 1856 transitions. Second operand 4 states. [2019-10-13 21:09:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:56,803 INFO L93 Difference]: Finished difference Result 2292 states and 3685 transitions. [2019-10-13 21:09:56,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:56,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2019-10-13 21:09:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:56,812 INFO L225 Difference]: With dead ends: 2292 [2019-10-13 21:09:56,812 INFO L226 Difference]: Without dead ends: 1160 [2019-10-13 21:09:56,818 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 [2019-10-13 21:09:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2019-10-13 21:09:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1160. [2019-10-13 21:09:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2019-10-13 21:09:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1855 transitions. [2019-10-13 21:09:56,860 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1855 transitions. Word has length 168 [2019-10-13 21:09:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:56,861 INFO L462 AbstractCegarLoop]: Abstraction has 1160 states and 1855 transitions. [2019-10-13 21:09:56,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1855 transitions. [2019-10-13 21:09:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 21:09:56,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:56,866 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] [2019-10-13 21:09:57,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,075 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:57,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1896519639, now seen corresponding path program 1 times [2019-10-13 21:09:57,075 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:57,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627424504] [2019-10-13 21:09:57,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:57,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:57,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627424504] [2019-10-13 21:09:57,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175458677] [2019-10-13 21:09:57,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:57,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 3292 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:57,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:57,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:58,119 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:58,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:58,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411331933] [2019-10-13 21:09:58,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:58,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:58,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:58,121 INFO L87 Difference]: Start difference. First operand 1160 states and 1855 transitions. Second operand 4 states. [2019-10-13 21:09:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:58,219 INFO L93 Difference]: Finished difference Result 2299 states and 3692 transitions. [2019-10-13 21:09:58,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:58,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2019-10-13 21:09:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:58,230 INFO L225 Difference]: With dead ends: 2299 [2019-10-13 21:09:58,231 INFO L226 Difference]: Without dead ends: 1169 [2019-10-13 21:09:58,237 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 [2019-10-13 21:09:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-10-13 21:09:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1169. [2019-10-13 21:09:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1169 states. [2019-10-13 21:09:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1867 transitions. [2019-10-13 21:09:58,300 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1867 transitions. Word has length 170 [2019-10-13 21:09:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:58,300 INFO L462 AbstractCegarLoop]: Abstraction has 1169 states and 1867 transitions. [2019-10-13 21:09:58,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1867 transitions. [2019-10-13 21:09:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 21:09:58,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:58,308 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] [2019-10-13 21:09:58,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:58,519 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:58,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1839187851, now seen corresponding path program 1 times [2019-10-13 21:09:58,520 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:58,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471873052] [2019-10-13 21:09:58,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:58,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:58,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471873052] [2019-10-13 21:09:58,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976753581] [2019-10-13 21:09:58,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:59,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 3293 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:59,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:09:59,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:09:59,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:59,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:59,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757991953] [2019-10-13 21:09:59,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:59,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:59,641 INFO L87 Difference]: Start difference. First operand 1169 states and 1867 transitions. Second operand 4 states. [2019-10-13 21:09:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:59,732 INFO L93 Difference]: Finished difference Result 2301 states and 3693 transitions. [2019-10-13 21:09:59,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:59,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-13 21:09:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:59,741 INFO L225 Difference]: With dead ends: 2301 [2019-10-13 21:09:59,741 INFO L226 Difference]: Without dead ends: 1169 [2019-10-13 21:09:59,748 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 [2019-10-13 21:09:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-10-13 21:09:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1169. [2019-10-13 21:09:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1169 states. [2019-10-13 21:09:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1866 transitions. [2019-10-13 21:09:59,795 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1866 transitions. Word has length 171 [2019-10-13 21:09:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:59,797 INFO L462 AbstractCegarLoop]: Abstraction has 1169 states and 1866 transitions. [2019-10-13 21:09:59,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1866 transitions. [2019-10-13 21:09:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 21:09:59,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:59,803 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] [2019-10-13 21:10:00,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,019 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash 201198171, now seen corresponding path program 1 times [2019-10-13 21:10:00,021 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:00,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742203047] [2019-10-13 21:10:00,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,022 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:00,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:00,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742203047] [2019-10-13 21:10:00,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226862779] [2019-10-13 21:10:00,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:00,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 3294 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:00,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:00,896 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:01,177 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:01,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:01,178 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806399065] [2019-10-13 21:10:01,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:01,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:01,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:01,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:01,180 INFO L87 Difference]: Start difference. First operand 1169 states and 1866 transitions. Second operand 4 states. [2019-10-13 21:10:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:01,273 INFO L93 Difference]: Finished difference Result 2301 states and 3692 transitions. [2019-10-13 21:10:01,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:01,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-10-13 21:10:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:01,282 INFO L225 Difference]: With dead ends: 2301 [2019-10-13 21:10:01,282 INFO L226 Difference]: Without dead ends: 1169 [2019-10-13 21:10:01,289 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 [2019-10-13 21:10:01,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2019-10-13 21:10:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1169. [2019-10-13 21:10:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1169 states. [2019-10-13 21:10:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1865 transitions. [2019-10-13 21:10:01,340 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1865 transitions. Word has length 172 [2019-10-13 21:10:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:01,342 INFO L462 AbstractCegarLoop]: Abstraction has 1169 states and 1865 transitions. [2019-10-13 21:10:01,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1865 transitions. [2019-10-13 21:10:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:10:01,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:01,347 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] [2019-10-13 21:10:01,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:01,563 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1102421391, now seen corresponding path program 1 times [2019-10-13 21:10:01,564 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:01,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319670664] [2019-10-13 21:10:01,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,565 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:01,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:01,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319670664] [2019-10-13 21:10:01,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203570922] [2019-10-13 21:10:01,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:02,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:02,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:03,113 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:03,486 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:03,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:10:03,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330438810] [2019-10-13 21:10:03,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:03,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:03,488 INFO L87 Difference]: Start difference. First operand 1169 states and 1865 transitions. Second operand 7 states. [2019-10-13 21:10:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:03,638 INFO L93 Difference]: Finished difference Result 2308 states and 3701 transitions. [2019-10-13 21:10:03,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:03,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2019-10-13 21:10:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:03,646 INFO L225 Difference]: With dead ends: 2308 [2019-10-13 21:10:03,647 INFO L226 Difference]: Without dead ends: 1180 [2019-10-13 21:10:03,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:10:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2019-10-13 21:10:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1176. [2019-10-13 21:10:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2019-10-13 21:10:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1875 transitions. [2019-10-13 21:10:03,695 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1875 transitions. Word has length 173 [2019-10-13 21:10:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:03,696 INFO L462 AbstractCegarLoop]: Abstraction has 1176 states and 1875 transitions. [2019-10-13 21:10:03,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1875 transitions. [2019-10-13 21:10:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 21:10:03,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:03,701 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] [2019-10-13 21:10:03,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:03,914 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 849321655, now seen corresponding path program 1 times [2019-10-13 21:10:03,914 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:03,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013076590] [2019-10-13 21:10:03,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:03,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:04,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013076590] [2019-10-13 21:10:04,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316767148] [2019-10-13 21:10:04,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:04,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 3295 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:04,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:04,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:05,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:05,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 7] total 10 [2019-10-13 21:10:05,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72122436] [2019-10-13 21:10:05,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:10:05,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:10:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:05,159 INFO L87 Difference]: Start difference. First operand 1176 states and 1875 transitions. Second operand 7 states. [2019-10-13 21:10:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:05,284 INFO L93 Difference]: Finished difference Result 2314 states and 3710 transitions. [2019-10-13 21:10:05,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:10:05,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 174 [2019-10-13 21:10:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:05,293 INFO L225 Difference]: With dead ends: 2314 [2019-10-13 21:10:05,293 INFO L226 Difference]: Without dead ends: 1183 [2019-10-13 21:10:05,299 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 338 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2019-10-13 21:10:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1179. [2019-10-13 21:10:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1179 states. [2019-10-13 21:10:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1880 transitions. [2019-10-13 21:10:05,347 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1880 transitions. Word has length 174 [2019-10-13 21:10:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:05,347 INFO L462 AbstractCegarLoop]: Abstraction has 1179 states and 1880 transitions. [2019-10-13 21:10:05,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:10:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1880 transitions. [2019-10-13 21:10:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 21:10:05,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:05,352 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] [2019-10-13 21:10:05,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:05,560 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1137245328, now seen corresponding path program 1 times [2019-10-13 21:10:05,561 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:05,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139408387] [2019-10-13 21:10:05,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:05,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:05,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139408387] [2019-10-13 21:10:05,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75003886] [2019-10-13 21:10:05,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:06,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 3294 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:06,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:06,476 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:06,803 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:06,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:06,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453148495] [2019-10-13 21:10:06,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:06,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:06,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:06,805 INFO L87 Difference]: Start difference. First operand 1179 states and 1880 transitions. Second operand 4 states. [2019-10-13 21:10:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:07,009 INFO L93 Difference]: Finished difference Result 2319 states and 3720 transitions. [2019-10-13 21:10:07,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:07,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-13 21:10:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:07,019 INFO L225 Difference]: With dead ends: 2319 [2019-10-13 21:10:07,019 INFO L226 Difference]: Without dead ends: 1179 [2019-10-13 21:10:07,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2019-10-13 21:10:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1179. [2019-10-13 21:10:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1179 states. [2019-10-13 21:10:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1875 transitions. [2019-10-13 21:10:07,088 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1875 transitions. Word has length 173 [2019-10-13 21:10:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:07,089 INFO L462 AbstractCegarLoop]: Abstraction has 1179 states and 1875 transitions. [2019-10-13 21:10:07,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1875 transitions. [2019-10-13 21:10:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 21:10:07,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:07,098 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] [2019-10-13 21:10:07,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:07,309 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash 461916052, now seen corresponding path program 1 times [2019-10-13 21:10:07,311 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:07,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918821302] [2019-10-13 21:10:07,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:07,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 21:10:07,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918821302] [2019-10-13 21:10:07,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146580816] [2019-10-13 21:10:07,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:08,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:08,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:08,250 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:08,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:08,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:08,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405990119] [2019-10-13 21:10:08,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:08,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:08,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:08,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:08,570 INFO L87 Difference]: Start difference. First operand 1179 states and 1875 transitions. Second operand 4 states. [2019-10-13 21:10:08,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:08,768 INFO L93 Difference]: Finished difference Result 2319 states and 3710 transitions. [2019-10-13 21:10:08,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:08,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-13 21:10:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:08,784 INFO L225 Difference]: With dead ends: 2319 [2019-10-13 21:10:08,784 INFO L226 Difference]: Without dead ends: 1179 [2019-10-13 21:10:08,790 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2019-10-13 21:10:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1179. [2019-10-13 21:10:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1179 states. [2019-10-13 21:10:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1870 transitions. [2019-10-13 21:10:08,844 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1870 transitions. Word has length 175 [2019-10-13 21:10:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:08,845 INFO L462 AbstractCegarLoop]: Abstraction has 1179 states and 1870 transitions. [2019-10-13 21:10:08,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1870 transitions. [2019-10-13 21:10:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 21:10:08,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:08,972 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] [2019-10-13 21:10:09,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:09,184 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -414729210, now seen corresponding path program 1 times [2019-10-13 21:10:09,185 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:09,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682379102] [2019-10-13 21:10:09,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:09,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:10:09,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682379102] [2019-10-13 21:10:09,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492269930] [2019-10-13 21:10:09,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:10,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:10,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:10,264 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:10,522 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:10,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:10:10,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789070429] [2019-10-13 21:10:10,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:10,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:10,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:10,524 INFO L87 Difference]: Start difference. First operand 1179 states and 1870 transitions. Second operand 4 states. [2019-10-13 21:10:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:10,709 INFO L93 Difference]: Finished difference Result 2358 states and 3761 transitions. [2019-10-13 21:10:10,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:10,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-13 21:10:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:10,717 INFO L225 Difference]: With dead ends: 2358 [2019-10-13 21:10:10,717 INFO L226 Difference]: Without dead ends: 1224 [2019-10-13 21:10:10,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:10:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2019-10-13 21:10:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1218. [2019-10-13 21:10:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-10-13 21:10:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1932 transitions. [2019-10-13 21:10:10,768 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1932 transitions. Word has length 177 [2019-10-13 21:10:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:10,769 INFO L462 AbstractCegarLoop]: Abstraction has 1218 states and 1932 transitions. [2019-10-13 21:10:10,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1932 transitions. [2019-10-13 21:10:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:10,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:10,774 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] [2019-10-13 21:10:10,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:10,982 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:10,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2055869186, now seen corresponding path program 1 times [2019-10-13 21:10:10,983 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:10,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179453601] [2019-10-13 21:10:10,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:10,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 21:10:11,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179453601] [2019-10-13 21:10:11,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441391826] [2019-10-13 21:10:11,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:12,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:12,051 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:12,329 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:12,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2019-10-13 21:10:12,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189272242] [2019-10-13 21:10:12,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:12,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:12,333 INFO L87 Difference]: Start difference. First operand 1218 states and 1932 transitions. Second operand 4 states. [2019-10-13 21:10:12,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:12,545 INFO L93 Difference]: Finished difference Result 2352 states and 3751 transitions. [2019-10-13 21:10:12,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:12,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-13 21:10:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:12,553 INFO L225 Difference]: With dead ends: 2352 [2019-10-13 21:10:12,554 INFO L226 Difference]: Without dead ends: 1218 [2019-10-13 21:10:12,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 355 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-10-13 21:10:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1218. [2019-10-13 21:10:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-10-13 21:10:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1927 transitions. [2019-10-13 21:10:12,603 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1927 transitions. Word has length 179 [2019-10-13 21:10:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:12,603 INFO L462 AbstractCegarLoop]: Abstraction has 1218 states and 1927 transitions. [2019-10-13 21:10:12,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1927 transitions. [2019-10-13 21:10:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 21:10:12,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:12,610 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] [2019-10-13 21:10:12,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:12,818 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:12,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:12,819 INFO L82 PathProgramCache]: Analyzing trace with hash -642615282, now seen corresponding path program 1 times [2019-10-13 21:10:12,819 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:12,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100698497] [2019-10-13 21:10:12,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:12,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:12,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100698497] [2019-10-13 21:10:12,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332180704] [2019-10-13 21:10:12,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:13,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 3296 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:10:13,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:13,771 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:14,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:10:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 21:10:14,359 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:14,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:10:14,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630739602] [2019-10-13 21:10:14,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:10:14,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:10:14,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:10:14,362 INFO L87 Difference]: Start difference. First operand 1218 states and 1927 transitions. Second operand 9 states. [2019-10-13 21:10:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:14,591 INFO L93 Difference]: Finished difference Result 2359 states and 3757 transitions. [2019-10-13 21:10:14,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:10:14,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 21:10:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:14,600 INFO L225 Difference]: With dead ends: 2359 [2019-10-13 21:10:14,600 INFO L226 Difference]: Without dead ends: 1229 [2019-10-13 21:10:14,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:10:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2019-10-13 21:10:14,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1220. [2019-10-13 21:10:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1220 states. [2019-10-13 21:10:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1931 transitions. [2019-10-13 21:10:14,646 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1931 transitions. Word has length 178 [2019-10-13 21:10:14,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:14,647 INFO L462 AbstractCegarLoop]: Abstraction has 1220 states and 1931 transitions. [2019-10-13 21:10:14,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:10:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1931 transitions. [2019-10-13 21:10:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:10:14,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:14,652 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] [2019-10-13 21:10:14,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:14,860 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash 803698401, now seen corresponding path program 1 times [2019-10-13 21:10:14,860 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:14,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469328544] [2019-10-13 21:10:14,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:14,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:10:14,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469328544] [2019-10-13 21:10:14,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650360431] [2019-10-13 21:10:14,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:15,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:10:15,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:10:15,780 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 21:10:16,022 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:10:16,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:10:16,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760800848] [2019-10-13 21:10:16,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:16,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:16,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:16,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:10:16,023 INFO L87 Difference]: Start difference. First operand 1220 states and 1931 transitions. Second operand 4 states. [2019-10-13 21:10:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:16,205 INFO L93 Difference]: Finished difference Result 2356 states and 3753 transitions. [2019-10-13 21:10:16,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:10:16,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 179 [2019-10-13 21:10:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:16,213 INFO L225 Difference]: With dead ends: 2356 [2019-10-13 21:10:16,213 INFO L226 Difference]: Without dead ends: 1220 [2019-10-13 21:10:16,217 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 [2019-10-13 21:10:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2019-10-13 21:10:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1220. [2019-10-13 21:10:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1220 states. [2019-10-13 21:10:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1926 transitions. [2019-10-13 21:10:16,254 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1926 transitions. Word has length 179 [2019-10-13 21:10:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:16,255 INFO L462 AbstractCegarLoop]: Abstraction has 1220 states and 1926 transitions. [2019-10-13 21:10:16,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1926 transitions. [2019-10-13 21:10:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 21:10:16,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:16,261 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, 1] [2019-10-13 21:10:16,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:16,470 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1717618327, now seen corresponding path program 1 times [2019-10-13 21:10:16,471 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:16,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852290861] [2019-10-13 21:10:16,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:16,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 21:10:16,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852290861] [2019-10-13 21:10:16,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290125697] [2019-10-13 21:10:16,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:17,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 3301 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:17,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:17,545 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:10:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:17,918 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:10:17,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:10:17,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713672792] [2019-10-13 21:10:17,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:10:17,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:10:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:10:17,920 INFO L87 Difference]: Start difference. First operand 1220 states and 1926 transitions. Second operand 11 states. [2019-10-13 21:10:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:18,050 INFO L93 Difference]: Finished difference Result 2293 states and 3649 transitions. [2019-10-13 21:10:18,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:18,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 180 [2019-10-13 21:10:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:18,059 INFO L225 Difference]: With dead ends: 2293 [2019-10-13 21:10:18,059 INFO L226 Difference]: Without dead ends: 1237 [2019-10-13 21:10:18,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:10:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2019-10-13 21:10:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1227. [2019-10-13 21:10:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2019-10-13 21:10:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1936 transitions. [2019-10-13 21:10:18,102 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1936 transitions. Word has length 180 [2019-10-13 21:10:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:18,103 INFO L462 AbstractCegarLoop]: Abstraction has 1227 states and 1936 transitions. [2019-10-13 21:10:18,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:10:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1936 transitions. [2019-10-13 21:10:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 21:10:18,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:18,109 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] [2019-10-13 21:10:18,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:18,317 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash -640246248, now seen corresponding path program 1 times [2019-10-13 21:10:18,319 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:18,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36813793] [2019-10-13 21:10:18,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:18,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 21:10:18,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36813793] [2019-10-13 21:10:18,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551503026] [2019-10-13 21:10:18,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:10:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:19,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 3302 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:10:19,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:10:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 21:10:19,336 INFO L321 TraceCheckSpWp]: Computing backward predicates...