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_spec3_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:10:35,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:10:35,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:10:35,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:10:35,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:10:35,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:10:35,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:10:35,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:10:35,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:10:35,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:10:35,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:10:35,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:10:35,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:10:35,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:10:35,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:10:35,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:10:35,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:10:35,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:10:35,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:10:35,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:10:35,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:10:35,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:10:35,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:10:35,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:10:35,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:10:35,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:10:35,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:10:35,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:10:35,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:10:35,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:10:35,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:10:35,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:10:35,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:10:35,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:10:35,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:10:35,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:10:35,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:10:35,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:10:35,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:10:35,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:10:35,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:10:35,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:10:35,410 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:10:35,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:10:35,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:10:35,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:10:35,412 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:10:35,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:10:35,412 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:10:35,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:10:35,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:10:35,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:10:35,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:10:35,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:10:35,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:10:35,413 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:10:35,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:10:35,414 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:10:35,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:10:35,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:10:35,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:10:35,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:10:35,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:10:35,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:10:35,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:10:35,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:10:35,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:10:35,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:10:35,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:10:35,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:10:35,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:10:35,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:10:35,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:10:35,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:10:35,729 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:10:35,730 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:10:35,731 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product19.cil.c [2019-10-15 01:10:35,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98fda26c/ea25a906ac5c481c99cf9575dbea7893/FLAGfdf2446ce [2019-10-15 01:10:36,416 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:10:36,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product19.cil.c [2019-10-15 01:10:36,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98fda26c/ea25a906ac5c481c99cf9575dbea7893/FLAGfdf2446ce [2019-10-15 01:10:36,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98fda26c/ea25a906ac5c481c99cf9575dbea7893 [2019-10-15 01:10:36,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:10:36,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:10:36,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:10:36,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:10:36,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:10:36,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:10:36" (1/1) ... [2019-10-15 01:10:36,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12de4e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:36, skipping insertion in model container [2019-10-15 01:10:36,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:10:36" (1/1) ... [2019-10-15 01:10:36,701 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:10:36,798 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:10:37,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:10:37,543 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:10:37,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:10:37,736 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:10:37,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37 WrapperNode [2019-10-15 01:10:37,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:10:37,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:10:37,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:10:37,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:10:37,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... [2019-10-15 01:10:37,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:10:37,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:10:37,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:10:37,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:10:37,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:10:38,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:10:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:10:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 01:10:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 01:10:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 01:10:38,017 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 01:10:38,017 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 01:10:38,017 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 01:10:38,017 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 01:10:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 01:10:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 01:10:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 01:10:38,018 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 01:10:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 01:10:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 01:10:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 01:10:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 01:10:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 01:10:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 01:10:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:10:38,020 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 01:10:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 01:10:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 01:10:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 01:10:38,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 01:10:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 01:10:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 01:10:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 01:10:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 01:10:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 01:10:38,022 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-15 01:10:38,023 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 01:10:38,023 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-15 01:10:38,023 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 01:10:38,023 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 01:10:38,023 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 01:10:38,024 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 01:10:38,024 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 01:10:38,024 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 01:10:38,024 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 01:10:38,024 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 01:10:38,024 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 01:10:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 01:10:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:10:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 01:10:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 01:10:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 01:10:38,025 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:10:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 01:10:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 01:10:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 01:10:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 01:10:38,026 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 01:10:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 01:10:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-15 01:10:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-15 01:10:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 01:10:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 01:10:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 01:10:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 01:10:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 01:10:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 01:10:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 01:10:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-15 01:10:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-15 01:10:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 01:10:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 01:10:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 01:10:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 01:10:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 01:10:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 01:10:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 01:10:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 01:10:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 01:10:38,030 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 01:10:38,031 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 01:10:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:10:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:10:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:10:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 01:10:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 01:10:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 01:10:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 01:10:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 01:10:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 01:10:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 01:10:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 01:10:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 01:10:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 01:10:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 01:10:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 01:10:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 01:10:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 01:10:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 01:10:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 01:10:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 01:10:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 01:10:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 01:10:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 01:10:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 01:10:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 01:10:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 01:10:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 01:10:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 01:10:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 01:10:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 01:10:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:10:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 01:10:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 01:10:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 01:10:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 01:10:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 01:10:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 01:10:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:10:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 01:10:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 01:10:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:10:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 01:10:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 01:10:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:10:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 01:10:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 01:10:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:10:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 01:10:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 01:10:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 01:10:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 01:10:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 01:10:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 01:10:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 01:10:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 01:10:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 01:10:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 01:10:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 01:10:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 01:10:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 01:10:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 01:10:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 01:10:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 01:10:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 01:10:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-15 01:10:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-15 01:10:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-15 01:10:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-15 01:10:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 01:10:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 01:10:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 01:10:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 01:10:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 01:10:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-15 01:10:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 01:10:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 01:10:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-15 01:10:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 01:10:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 01:10:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 01:10:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-15 01:10:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-15 01:10:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 01:10:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 01:10:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 01:10:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 01:10:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 01:10:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 01:10:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:10:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:10:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:10:40,179 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:10:40,180 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:10:40,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:10:40 BoogieIcfgContainer [2019-10-15 01:10:40,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:10:40,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:10:40,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:10:40,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:10:40,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:10:36" (1/3) ... [2019-10-15 01:10:40,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9aa911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:10:40, skipping insertion in model container [2019-10-15 01:10:40,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:10:37" (2/3) ... [2019-10-15 01:10:40,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9aa911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:10:40, skipping insertion in model container [2019-10-15 01:10:40,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:10:40" (3/3) ... [2019-10-15 01:10:40,190 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2019-10-15 01:10:40,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:10:40,212 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:10:40,224 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:10:40,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:10:40,266 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:10:40,266 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:10:40,266 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:10:40,267 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:10:40,267 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:10:40,267 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:10:40,267 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:10:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-10-15 01:10:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 01:10:40,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:40,347 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:40,350 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:40,357 INFO L82 PathProgramCache]: Analyzing trace with hash 756079389, now seen corresponding path program 1 times [2019-10-15 01:10:40,367 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:40,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829302860] [2019-10-15 01:10:40,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:40,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:40,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:41,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829302860] [2019-10-15 01:10:41,102 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:41,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:41,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005766686] [2019-10-15 01:10:41,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:41,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:41,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:41,127 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 7 states. [2019-10-15 01:10:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:41,452 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-10-15 01:10:41,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:10:41,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-15 01:10:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:41,500 INFO L225 Difference]: With dead ends: 1259 [2019-10-15 01:10:41,500 INFO L226 Difference]: Without dead ends: 638 [2019-10-15 01:10:41,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:10:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-15 01:10:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2019-10-15 01:10:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-10-15 01:10:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1012 transitions. [2019-10-15 01:10:41,650 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1012 transitions. Word has length 141 [2019-10-15 01:10:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:41,651 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1012 transitions. [2019-10-15 01:10:41,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:10:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1012 transitions. [2019-10-15 01:10:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 01:10:41,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:41,665 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:41,665 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash -742821217, now seen corresponding path program 1 times [2019-10-15 01:10:41,666 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:41,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318454920] [2019-10-15 01:10:41,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:41,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:41,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:41,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318454920] [2019-10-15 01:10:41,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:41,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:10:41,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564850159] [2019-10-15 01:10:41,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:10:41,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:41,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:10:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:10:41,980 INFO L87 Difference]: Start difference. First operand 636 states and 1012 transitions. Second operand 4 states. [2019-10-15 01:10:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:42,058 INFO L93 Difference]: Finished difference Result 1238 states and 1989 transitions. [2019-10-15 01:10:42,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:10:42,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-15 01:10:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:42,065 INFO L225 Difference]: With dead ends: 1238 [2019-10-15 01:10:42,066 INFO L226 Difference]: Without dead ends: 618 [2019-10-15 01:10:42,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:10:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-10-15 01:10:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-10-15 01:10:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-10-15 01:10:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 979 transitions. [2019-10-15 01:10:42,129 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 979 transitions. Word has length 142 [2019-10-15 01:10:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:42,130 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 979 transitions. [2019-10-15 01:10:42,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:10:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 979 transitions. [2019-10-15 01:10:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 01:10:42,134 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:42,134 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:42,135 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash 841451639, now seen corresponding path program 1 times [2019-10-15 01:10:42,135 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:42,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166733646] [2019-10-15 01:10:42,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:42,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:42,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:42,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166733646] [2019-10-15 01:10:42,340 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:42,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:42,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902430364] [2019-10-15 01:10:42,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:42,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:42,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:42,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:42,342 INFO L87 Difference]: Start difference. First operand 618 states and 979 transitions. Second operand 7 states. [2019-10-15 01:10:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:42,454 INFO L93 Difference]: Finished difference Result 1207 states and 1931 transitions. [2019-10-15 01:10:42,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:10:42,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-10-15 01:10:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:42,461 INFO L225 Difference]: With dead ends: 1207 [2019-10-15 01:10:42,462 INFO L226 Difference]: Without dead ends: 612 [2019-10-15 01:10:42,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:10:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-15 01:10:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-15 01:10:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-15 01:10:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 966 transitions. [2019-10-15 01:10:42,498 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 966 transitions. Word has length 142 [2019-10-15 01:10:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:42,498 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 966 transitions. [2019-10-15 01:10:42,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:10:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 966 transitions. [2019-10-15 01:10:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 01:10:42,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:42,503 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:42,503 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:42,504 INFO L82 PathProgramCache]: Analyzing trace with hash 571891073, now seen corresponding path program 1 times [2019-10-15 01:10:42,504 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:42,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509236856] [2019-10-15 01:10:42,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:42,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:42,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:42,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509236856] [2019-10-15 01:10:42,696 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:42,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:42,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839701699] [2019-10-15 01:10:42,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:42,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:42,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:42,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:42,698 INFO L87 Difference]: Start difference. First operand 612 states and 966 transitions. Second operand 7 states. [2019-10-15 01:10:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:42,890 INFO L93 Difference]: Finished difference Result 1195 states and 1905 transitions. [2019-10-15 01:10:42,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:10:42,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-15 01:10:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:42,897 INFO L225 Difference]: With dead ends: 1195 [2019-10-15 01:10:42,898 INFO L226 Difference]: Without dead ends: 606 [2019-10-15 01:10:42,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:10:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-10-15 01:10:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2019-10-15 01:10:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-10-15 01:10:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 953 transitions. [2019-10-15 01:10:42,931 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 953 transitions. Word has length 143 [2019-10-15 01:10:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:42,931 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 953 transitions. [2019-10-15 01:10:42,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:10:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 953 transitions. [2019-10-15 01:10:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:10:42,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:42,936 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:42,936 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2110652197, now seen corresponding path program 1 times [2019-10-15 01:10:42,937 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:42,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604281674] [2019-10-15 01:10:42,937 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:42,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:42,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:43,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604281674] [2019-10-15 01:10:43,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:43,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:43,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992329804] [2019-10-15 01:10:43,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:43,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:43,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:43,118 INFO L87 Difference]: Start difference. First operand 606 states and 953 transitions. Second operand 7 states. [2019-10-15 01:10:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:43,223 INFO L93 Difference]: Finished difference Result 1183 states and 1879 transitions. [2019-10-15 01:10:43,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:10:43,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-10-15 01:10:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:43,230 INFO L225 Difference]: With dead ends: 1183 [2019-10-15 01:10:43,230 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:10:43,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:10:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:10:43,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:10:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:10:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 940 transitions. [2019-10-15 01:10:43,260 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 940 transitions. Word has length 144 [2019-10-15 01:10:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:43,260 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 940 transitions. [2019-10-15 01:10:43,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:10:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 940 transitions. [2019-10-15 01:10:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 01:10:43,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:43,266 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:43,266 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 945368284, now seen corresponding path program 1 times [2019-10-15 01:10:43,269 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:43,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77926547] [2019-10-15 01:10:43,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:43,270 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:43,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:43,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77926547] [2019-10-15 01:10:43,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:43,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:43,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393421454] [2019-10-15 01:10:43,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:43,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:43,441 INFO L87 Difference]: Start difference. First operand 600 states and 940 transitions. Second operand 7 states. [2019-10-15 01:10:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:43,528 INFO L93 Difference]: Finished difference Result 1171 states and 1853 transitions. [2019-10-15 01:10:43,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:10:43,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-10-15 01:10:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:43,535 INFO L225 Difference]: With dead ends: 1171 [2019-10-15 01:10:43,535 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:10:43,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:10:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:10:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:10:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:10:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 939 transitions. [2019-10-15 01:10:43,609 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 939 transitions. Word has length 144 [2019-10-15 01:10:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:43,610 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 939 transitions. [2019-10-15 01:10:43,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:10:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 939 transitions. [2019-10-15 01:10:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:10:43,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:43,615 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:43,615 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2008719333, now seen corresponding path program 1 times [2019-10-15 01:10:43,616 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:43,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128690454] [2019-10-15 01:10:43,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:43,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:43,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:43,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128690454] [2019-10-15 01:10:43,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:43,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:10:43,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104614928] [2019-10-15 01:10:43,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:10:43,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:10:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:10:43,765 INFO L87 Difference]: Start difference. First operand 600 states and 939 transitions. Second operand 5 states. [2019-10-15 01:10:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:43,872 INFO L93 Difference]: Finished difference Result 1170 states and 1850 transitions. [2019-10-15 01:10:43,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:10:43,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-10-15 01:10:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:43,882 INFO L225 Difference]: With dead ends: 1170 [2019-10-15 01:10:43,882 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:10:43,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:10:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:10:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:10:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:10:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 938 transitions. [2019-10-15 01:10:43,925 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 938 transitions. Word has length 145 [2019-10-15 01:10:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:43,926 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 938 transitions. [2019-10-15 01:10:43,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:10:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 938 transitions. [2019-10-15 01:10:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 01:10:43,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:43,931 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:43,932 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:43,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1557988425, now seen corresponding path program 1 times [2019-10-15 01:10:43,933 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:43,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6369063] [2019-10-15 01:10:43,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:43,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:43,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:44,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6369063] [2019-10-15 01:10:44,141 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:44,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:10:44,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129413004] [2019-10-15 01:10:44,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:10:44,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:10:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:10:44,144 INFO L87 Difference]: Start difference. First operand 600 states and 938 transitions. Second operand 5 states. [2019-10-15 01:10:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:44,246 INFO L93 Difference]: Finished difference Result 1170 states and 1848 transitions. [2019-10-15 01:10:44,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:10:44,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-10-15 01:10:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:44,253 INFO L225 Difference]: With dead ends: 1170 [2019-10-15 01:10:44,253 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:10:44,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:10:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:10:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:10:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:10:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 937 transitions. [2019-10-15 01:10:44,291 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 937 transitions. Word has length 146 [2019-10-15 01:10:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:44,291 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 937 transitions. [2019-10-15 01:10:44,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:10:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 937 transitions. [2019-10-15 01:10:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 01:10:44,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:44,297 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-15 01:10:44,297 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:44,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1196360064, now seen corresponding path program 1 times [2019-10-15 01:10:44,298 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:44,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529987915] [2019-10-15 01:10:44,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:44,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:44,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:44,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529987915] [2019-10-15 01:10:44,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:44,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:10:44,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304240190] [2019-10-15 01:10:44,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:10:44,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:44,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:10:44,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:10:44,515 INFO L87 Difference]: Start difference. First operand 600 states and 937 transitions. Second operand 5 states. [2019-10-15 01:10:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:44,629 INFO L93 Difference]: Finished difference Result 1170 states and 1846 transitions. [2019-10-15 01:10:44,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:10:44,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-15 01:10:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:44,639 INFO L225 Difference]: With dead ends: 1170 [2019-10-15 01:10:44,639 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:10:44,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:10:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:10:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:10:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:10:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 936 transitions. [2019-10-15 01:10:44,707 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 936 transitions. Word has length 147 [2019-10-15 01:10:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:44,707 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 936 transitions. [2019-10-15 01:10:44,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:10:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 936 transitions. [2019-10-15 01:10:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-15 01:10:44,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:44,713 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:44,713 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1960010702, now seen corresponding path program 1 times [2019-10-15 01:10:44,714 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:44,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919117981] [2019-10-15 01:10:44,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:44,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:44,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:44,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919117981] [2019-10-15 01:10:44,856 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:44,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:10:44,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523840310] [2019-10-15 01:10:44,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:10:44,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:10:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:10:44,858 INFO L87 Difference]: Start difference. First operand 600 states and 936 transitions. Second operand 5 states. [2019-10-15 01:10:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:44,923 INFO L93 Difference]: Finished difference Result 1170 states and 1844 transitions. [2019-10-15 01:10:44,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:10:44,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-15 01:10:44,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:44,930 INFO L225 Difference]: With dead ends: 1170 [2019-10-15 01:10:44,930 INFO L226 Difference]: Without dead ends: 600 [2019-10-15 01:10:44,934 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:10:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-15 01:10:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-10-15 01:10:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-10-15 01:10:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 935 transitions. [2019-10-15 01:10:44,957 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 935 transitions. Word has length 148 [2019-10-15 01:10:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:44,957 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 935 transitions. [2019-10-15 01:10:44,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:10:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 935 transitions. [2019-10-15 01:10:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:10:44,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:44,961 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:44,961 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:44,962 INFO L82 PathProgramCache]: Analyzing trace with hash 629882651, now seen corresponding path program 1 times [2019-10-15 01:10:44,962 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:44,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148579107] [2019-10-15 01:10:44,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:44,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:44,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:10:45,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148579107] [2019-10-15 01:10:45,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245214910] [2019-10-15 01:10:45,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:45,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:10:45,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:10:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:10:45,901 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:10:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:46,059 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:10:46,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 01:10:46,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318096636] [2019-10-15 01:10:46,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:10:46,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:10:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:10:46,061 INFO L87 Difference]: Start difference. First operand 600 states and 935 transitions. Second operand 3 states. [2019-10-15 01:10:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:46,154 INFO L93 Difference]: Finished difference Result 1679 states and 2665 transitions. [2019-10-15 01:10:46,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:10:46,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:10:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:46,165 INFO L225 Difference]: With dead ends: 1679 [2019-10-15 01:10:46,166 INFO L226 Difference]: Without dead ends: 1113 [2019-10-15 01:10:46,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:10:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-10-15 01:10:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1100. [2019-10-15 01:10:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-10-15 01:10:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1733 transitions. [2019-10-15 01:10:46,256 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1733 transitions. Word has length 149 [2019-10-15 01:10:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:46,260 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1733 transitions. [2019-10-15 01:10:46,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:10:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1733 transitions. [2019-10-15 01:10:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:10:46,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:46,266 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:46,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:46,477 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash 65962223, now seen corresponding path program 1 times [2019-10-15 01:10:46,478 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:46,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347712067] [2019-10-15 01:10:46,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:46,479 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:46,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:46,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347712067] [2019-10-15 01:10:46,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:46,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:46,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159905187] [2019-10-15 01:10:46,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:46,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:46,652 INFO L87 Difference]: Start difference. First operand 1100 states and 1733 transitions. Second operand 7 states. [2019-10-15 01:10:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:49,707 INFO L93 Difference]: Finished difference Result 3234 states and 5216 transitions. [2019-10-15 01:10:49,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:10:49,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-10-15 01:10:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:49,725 INFO L225 Difference]: With dead ends: 3234 [2019-10-15 01:10:49,725 INFO L226 Difference]: Without dead ends: 2168 [2019-10-15 01:10:49,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:10:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2019-10-15 01:10:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2102. [2019-10-15 01:10:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2102 states. [2019-10-15 01:10:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 3377 transitions. [2019-10-15 01:10:49,840 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 3377 transitions. Word has length 153 [2019-10-15 01:10:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:49,840 INFO L462 AbstractCegarLoop]: Abstraction has 2102 states and 3377 transitions. [2019-10-15 01:10:49,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:10:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 3377 transitions. [2019-10-15 01:10:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 01:10:49,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:49,846 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:49,846 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash -331869422, now seen corresponding path program 1 times [2019-10-15 01:10:49,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:49,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826946835] [2019-10-15 01:10:49,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:49,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:49,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:10:50,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826946835] [2019-10-15 01:10:50,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934282048] [2019-10-15 01:10:50,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:50,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 3070 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:10:50,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:10:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:10:50,777 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:10:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:50,957 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:10:50,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 01:10:50,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610254504] [2019-10-15 01:10:50,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:10:50,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:50,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:10:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:10:50,960 INFO L87 Difference]: Start difference. First operand 2102 states and 3377 transitions. Second operand 3 states. [2019-10-15 01:10:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:51,124 INFO L93 Difference]: Finished difference Result 5182 states and 8408 transitions. [2019-10-15 01:10:51,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:10:51,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-10-15 01:10:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:51,161 INFO L225 Difference]: With dead ends: 5182 [2019-10-15 01:10:51,161 INFO L226 Difference]: Without dead ends: 3114 [2019-10-15 01:10:51,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:10:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2019-10-15 01:10:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 3014. [2019-10-15 01:10:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3014 states. [2019-10-15 01:10:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 4861 transitions. [2019-10-15 01:10:51,340 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 4861 transitions. Word has length 150 [2019-10-15 01:10:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:51,340 INFO L462 AbstractCegarLoop]: Abstraction has 3014 states and 4861 transitions. [2019-10-15 01:10:51,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:10:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 4861 transitions. [2019-10-15 01:10:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:10:51,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:51,354 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:51,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:51,568 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1286032454, now seen corresponding path program 1 times [2019-10-15 01:10:51,568 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:51,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219674505] [2019-10-15 01:10:51,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:51,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:51,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:10:51,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219674505] [2019-10-15 01:10:51,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882879552] [2019-10-15 01:10:51,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:52,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:10:52,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:10:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:10:52,454 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:10:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:52,562 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:10:52,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-15 01:10:52,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869493564] [2019-10-15 01:10:52,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:10:52,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:52,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:10:52,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:10:52,564 INFO L87 Difference]: Start difference. First operand 3014 states and 4861 transitions. Second operand 4 states. [2019-10-15 01:10:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:52,798 INFO L93 Difference]: Finished difference Result 6066 states and 9869 transitions. [2019-10-15 01:10:52,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:10:52,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-15 01:10:52,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:52,823 INFO L225 Difference]: With dead ends: 6066 [2019-10-15 01:10:52,824 INFO L226 Difference]: Without dead ends: 3086 [2019-10-15 01:10:52,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:10:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2019-10-15 01:10:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 3036. [2019-10-15 01:10:52,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3036 states. [2019-10-15 01:10:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 4889 transitions. [2019-10-15 01:10:52,976 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 4889 transitions. Word has length 153 [2019-10-15 01:10:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:52,977 INFO L462 AbstractCegarLoop]: Abstraction has 3036 states and 4889 transitions. [2019-10-15 01:10:52,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:10:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 4889 transitions. [2019-10-15 01:10:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:10:52,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:52,983 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:53,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:53,195 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -173329017, now seen corresponding path program 1 times [2019-10-15 01:10:53,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:53,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194190742] [2019-10-15 01:10:53,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:53,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:53,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:10:53,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194190742] [2019-10-15 01:10:53,314 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:53,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:10:53,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540721649] [2019-10-15 01:10:53,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:10:53,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:53,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:10:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:10:53,316 INFO L87 Difference]: Start difference. First operand 3036 states and 4889 transitions. Second operand 4 states. [2019-10-15 01:10:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:53,515 INFO L93 Difference]: Finished difference Result 6032 states and 9786 transitions. [2019-10-15 01:10:53,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:10:53,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-15 01:10:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:53,538 INFO L225 Difference]: With dead ends: 6032 [2019-10-15 01:10:53,539 INFO L226 Difference]: Without dead ends: 3030 [2019-10-15 01:10:53,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:10:53,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2019-10-15 01:10:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3020. [2019-10-15 01:10:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3020 states. [2019-10-15 01:10:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 4837 transitions. [2019-10-15 01:10:53,700 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 4837 transitions. Word has length 153 [2019-10-15 01:10:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:53,701 INFO L462 AbstractCegarLoop]: Abstraction has 3020 states and 4837 transitions. [2019-10-15 01:10:53,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:10:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 4837 transitions. [2019-10-15 01:10:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 01:10:53,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:53,708 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:53,709 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:53,709 INFO L82 PathProgramCache]: Analyzing trace with hash 843287171, now seen corresponding path program 1 times [2019-10-15 01:10:53,709 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:53,709 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906681997] [2019-10-15 01:10:53,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:53,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:53,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:10:53,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906681997] [2019-10-15 01:10:53,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989771782] [2019-10-15 01:10:53,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:54,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 3089 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:10:54,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:10:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:10:54,794 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:10:54,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:10:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 01:10:55,095 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:10:55,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-10-15 01:10:55,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894728285] [2019-10-15 01:10:55,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:10:55,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:10:55,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:10:55,097 INFO L87 Difference]: Start difference. First operand 3020 states and 4837 transitions. Second operand 6 states. [2019-10-15 01:10:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:10:56,689 INFO L93 Difference]: Finished difference Result 8143 states and 13161 transitions. [2019-10-15 01:10:56,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:10:56,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-15 01:10:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:10:56,740 INFO L225 Difference]: With dead ends: 8143 [2019-10-15 01:10:56,740 INFO L226 Difference]: Without dead ends: 5157 [2019-10-15 01:10:56,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:10:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2019-10-15 01:10:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 5117. [2019-10-15 01:10:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5117 states. [2019-10-15 01:10:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 8056 transitions. [2019-10-15 01:10:57,065 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 8056 transitions. Word has length 153 [2019-10-15 01:10:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:10:57,068 INFO L462 AbstractCegarLoop]: Abstraction has 5117 states and 8056 transitions. [2019-10-15 01:10:57,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:10:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 8056 transitions. [2019-10-15 01:10:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:10:57,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:10:57,076 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:10:57,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:10:57,286 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:10:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:10:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2011771696, now seen corresponding path program 1 times [2019-10-15 01:10:57,287 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:10:57,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136087984] [2019-10-15 01:10:57,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:57,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:10:57,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:10:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:10:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 01:10:57,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136087984] [2019-10-15 01:10:57,450 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:10:57,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:10:57,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372701300] [2019-10-15 01:10:57,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:10:57,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:10:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:10:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:10:57,452 INFO L87 Difference]: Start difference. First operand 5117 states and 8056 transitions. Second operand 7 states. [2019-10-15 01:11:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:11:00,375 INFO L93 Difference]: Finished difference Result 15270 states and 24549 transitions. [2019-10-15 01:11:00,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:11:00,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2019-10-15 01:11:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:11:00,449 INFO L225 Difference]: With dead ends: 15270 [2019-10-15 01:11:00,449 INFO L226 Difference]: Without dead ends: 10187 [2019-10-15 01:11:00,468 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:11:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2019-10-15 01:11:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 10103. [2019-10-15 01:11:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10103 states. [2019-10-15 01:11:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 16097 transitions. [2019-10-15 01:11:00,874 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 16097 transitions. Word has length 161 [2019-10-15 01:11:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:11:00,874 INFO L462 AbstractCegarLoop]: Abstraction has 10103 states and 16097 transitions. [2019-10-15 01:11:00,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:11:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 16097 transitions. [2019-10-15 01:11:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 01:11:00,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:11:00,881 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:11:00,881 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:11:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:11:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1810633537, now seen corresponding path program 1 times [2019-10-15 01:11:00,882 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:11:00,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103140005] [2019-10-15 01:11:00,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:11:00,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:11:00,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:11:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:11:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:11:01,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103140005] [2019-10-15 01:11:01,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:11:01,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:11:01,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490954842] [2019-10-15 01:11:01,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:11:01,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:11:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:11:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:11:01,005 INFO L87 Difference]: Start difference. First operand 10103 states and 16097 transitions. Second operand 4 states. [2019-10-15 01:11:01,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:11:01,399 INFO L93 Difference]: Finished difference Result 20210 states and 32463 transitions. [2019-10-15 01:11:01,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:11:01,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 01:11:01,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:11:02,132 INFO L225 Difference]: With dead ends: 20210 [2019-10-15 01:11:02,132 INFO L226 Difference]: Without dead ends: 10138 [2019-10-15 01:11:02,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:11:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2019-10-15 01:11:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 10106. [2019-10-15 01:11:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10106 states. [2019-10-15 01:11:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10106 states to 10106 states and 16059 transitions. [2019-10-15 01:11:02,510 INFO L78 Accepts]: Start accepts. Automaton has 10106 states and 16059 transitions. Word has length 162 [2019-10-15 01:11:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:11:02,510 INFO L462 AbstractCegarLoop]: Abstraction has 10106 states and 16059 transitions. [2019-10-15 01:11:02,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:11:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10106 states and 16059 transitions. [2019-10-15 01:11:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-15 01:11:02,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:11:02,518 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 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] [2019-10-15 01:11:02,518 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:11:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:11:02,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1930916020, now seen corresponding path program 1 times [2019-10-15 01:11:02,519 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:11:02,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328048111] [2019-10-15 01:11:02,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:11:02,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:11:02,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:11:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:11:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-15 01:11:02,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328048111] [2019-10-15 01:11:02,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175378367] [2019-10-15 01:11:02,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:11:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:11:03,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 3561 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:11:03,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:11:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-15 01:11:03,361 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:11:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-15 01:11:03,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:11:03,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 3] total 13 [2019-10-15 01:11:03,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586655702] [2019-10-15 01:11:03,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:11:03,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:11:03,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:11:03,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:11:03,646 INFO L87 Difference]: Start difference. First operand 10106 states and 16059 transitions. Second operand 3 states. [2019-10-15 01:11:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:11:04,225 INFO L93 Difference]: Finished difference Result 29920 states and 47998 transitions. [2019-10-15 01:11:04,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:11:04,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2019-10-15 01:11:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:11:04,383 INFO L225 Difference]: With dead ends: 29920 [2019-10-15 01:11:04,383 INFO L226 Difference]: Without dead ends: 19855 [2019-10-15 01:11:04,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:11:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19855 states. [2019-10-15 01:11:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19855 to 19683. [2019-10-15 01:11:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19683 states. [2019-10-15 01:11:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19683 states to 19683 states and 31394 transitions. [2019-10-15 01:11:05,142 INFO L78 Accepts]: Start accepts. Automaton has 19683 states and 31394 transitions. Word has length 256 [2019-10-15 01:11:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:11:05,142 INFO L462 AbstractCegarLoop]: Abstraction has 19683 states and 31394 transitions. [2019-10-15 01:11:05,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:11:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 19683 states and 31394 transitions. [2019-10-15 01:11:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:11:05,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:11:05,151 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:11:05,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:11:05,358 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:11:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:11:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash 833473413, now seen corresponding path program 1 times [2019-10-15 01:11:05,359 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:11:05,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335489331] [2019-10-15 01:11:05,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:11:05,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:11:05,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:11:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:11:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:11:05,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335489331] [2019-10-15 01:11:05,659 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:11:05,660 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:11:05,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815268708] [2019-10-15 01:11:05,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:11:05,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:11:05,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:11:05,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:11:05,661 INFO L87 Difference]: Start difference. First operand 19683 states and 31394 transitions. Second operand 7 states.