/usr/bin/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-fb55353 [2019-11-07 00:43:35,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:43:35,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:43:35,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:43:35,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:43:35,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:43:35,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:43:35,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:43:35,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:43:35,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:43:35,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:43:35,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:43:35,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:43:35,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:43:35,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:43:35,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:43:35,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:43:35,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:43:35,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:43:35,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:43:35,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:43:35,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:43:35,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:43:35,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:43:35,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:43:35,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:43:35,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:43:35,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:43:35,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:43:35,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:43:35,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:43:35,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:43:35,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:43:35,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:43:35,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:43:35,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:43:35,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:43:35,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:43:35,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:43:35,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:43:35,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:43:35,183 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 [2019-11-07 00:43:35,217 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:43:35,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:43:35,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:43:35,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:43:35,222 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:43:35,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:43:35,223 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:43:35,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:43:35,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:43:35,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:43:35,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:43:35,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:43:35,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:43:35,224 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:43:35,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:43:35,225 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:43:35,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:43:35,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:43:35,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:43:35,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:43:35,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:43:35,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:35,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:43:35,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:43:35,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:43:35,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:43:35,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:43:35,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:43:35,227 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 [2019-11-07 00:43:35,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:43:35,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:43:35,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:43:35,529 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:43:35,529 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:43:35,530 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product19.cil.c [2019-11-07 00:43:35,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213b93aa6/f9e2c74e5b294cbe882fe1ebba6c2abc/FLAGa64b45f58 [2019-11-07 00:43:36,274 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:43:36,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product19.cil.c [2019-11-07 00:43:36,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213b93aa6/f9e2c74e5b294cbe882fe1ebba6c2abc/FLAGa64b45f58 [2019-11-07 00:43:36,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213b93aa6/f9e2c74e5b294cbe882fe1ebba6c2abc [2019-11-07 00:43:36,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:43:36,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:43:36,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:36,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:43:36,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:43:36,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:36" (1/1) ... [2019-11-07 00:43:36,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce5549b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:36, skipping insertion in model container [2019-11-07 00:43:36,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:36" (1/1) ... [2019-11-07 00:43:36,518 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:43:36,605 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:43:37,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:37,411 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:43:37,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:37,628 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:43:37,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37 WrapperNode [2019-11-07 00:43:37,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:37,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:43:37,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:43:37,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:43:37,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (1/1) ... [2019-11-07 00:43:37,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:43:37,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:43:37,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:43:37,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:43:37,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (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 [2019-11-07 00:43:37,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:43:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:43:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:43:37,969 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:43:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:43:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:43:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:43:37,971 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:43:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:43:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:43:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:43:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:43:37,973 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:43:37,974 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:43:37,974 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:43:37,976 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:43:37,976 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:43:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:43:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:43:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:43:37,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:37,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:37,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:37,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:43:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:43:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:43:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:43:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:43:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:43:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:43:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:43:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:43:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:43:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:43:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:43:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:43:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:43:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:43:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:43:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:43:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:43:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:43:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:43:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:43:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:43:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:43:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:43:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:43:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:43:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:43:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:43:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:43:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:43:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:43:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:43:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:43:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:43:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:43:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:43:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:43:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:43:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:43:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:43:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:43:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:43:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:43:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:43:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:43:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:43:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:43:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:43:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:43:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:43:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:43:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:43:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:43:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:43:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:43:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:43:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:43:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:43:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:43:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:43:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:43:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:43:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:43:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:43:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:43:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:43:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:43:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:43:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:43:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:43:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:43:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:43:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:43:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:43:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:43:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:43:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:43:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:43:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:43:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:43:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:43:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:43:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:43:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:43:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:43:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:43:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:43:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:43:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:43:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:43:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:43:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:43:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:43:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:43:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:43:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:43:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:43:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:43:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:43:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:43:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:43:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:43:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:43:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:43:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:43:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:43:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:43:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:43:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:43:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:43:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:43:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:43:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:43:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:43:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:43:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:43:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:43:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:43:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:43:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:43:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:43:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:43:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:43:40,354 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:43:40,355 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:43:40,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:40 BoogieIcfgContainer [2019-11-07 00:43:40,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:43:40,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:43:40,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:43:40,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:43:40,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:43:36" (1/3) ... [2019-11-07 00:43:40,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce3ea39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:40, skipping insertion in model container [2019-11-07 00:43:40,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:37" (2/3) ... [2019-11-07 00:43:40,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce3ea39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:40, skipping insertion in model container [2019-11-07 00:43:40,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:40" (3/3) ... [2019-11-07 00:43:40,368 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2019-11-07 00:43:40,380 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:43:40,394 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:43:40,407 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:43:40,459 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:43:40,459 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:43:40,459 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:43:40,459 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:43:40,459 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:43:40,460 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:43:40,460 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:43:40,460 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:43:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states. [2019-11-07 00:43:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:43:40,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:40,540 INFO L410 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] [2019-11-07 00:43:40,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash 756079389, now seen corresponding path program 1 times [2019-11-07 00:43:40,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:40,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557448948] [2019-11-07 00:43:40,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:41,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557448948] [2019-11-07 00:43:41,310 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:41,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:41,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689055362] [2019-11-07 00:43:41,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:41,318 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:41,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:41,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:41,336 INFO L87 Difference]: Start difference. First operand 790 states. Second operand 7 states. [2019-11-07 00:43:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:41,571 INFO L93 Difference]: Finished difference Result 1259 states and 2034 transitions. [2019-11-07 00:43:41,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:41,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-11-07 00:43:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:41,601 INFO L225 Difference]: With dead ends: 1259 [2019-11-07 00:43:41,601 INFO L226 Difference]: Without dead ends: 638 [2019-11-07 00:43:41,612 INFO L630 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 [2019-11-07 00:43:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-07 00:43:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2019-11-07 00:43:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-07 00:43:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1012 transitions. [2019-11-07 00:43:41,727 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1012 transitions. Word has length 141 [2019-11-07 00:43:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:41,728 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1012 transitions. [2019-11-07 00:43:41,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1012 transitions. [2019-11-07 00:43:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:43:41,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:41,734 INFO L410 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] [2019-11-07 00:43:41,735 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash -742821217, now seen corresponding path program 1 times [2019-11-07 00:43:41,735 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:41,736 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427638169] [2019-11-07 00:43:41,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:42,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427638169] [2019-11-07 00:43:42,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:42,016 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:42,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502638452] [2019-11-07 00:43:42,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:42,021 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:42,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:42,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:42,022 INFO L87 Difference]: Start difference. First operand 636 states and 1012 transitions. Second operand 4 states. [2019-11-07 00:43:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:42,098 INFO L93 Difference]: Finished difference Result 1238 states and 1989 transitions. [2019-11-07 00:43:42,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:42,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-11-07 00:43:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:42,104 INFO L225 Difference]: With dead ends: 1238 [2019-11-07 00:43:42,105 INFO L226 Difference]: Without dead ends: 618 [2019-11-07 00:43:42,109 INFO L630 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 [2019-11-07 00:43:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2019-11-07 00:43:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2019-11-07 00:43:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2019-11-07 00:43:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 979 transitions. [2019-11-07 00:43:42,141 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 979 transitions. Word has length 142 [2019-11-07 00:43:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:42,142 INFO L462 AbstractCegarLoop]: Abstraction has 618 states and 979 transitions. [2019-11-07 00:43:42,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 979 transitions. [2019-11-07 00:43:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:43:42,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:42,147 INFO L410 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] [2019-11-07 00:43:42,147 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:42,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:42,147 INFO L82 PathProgramCache]: Analyzing trace with hash 841451639, now seen corresponding path program 1 times [2019-11-07 00:43:42,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:42,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359215905] [2019-11-07 00:43:42,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:42,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359215905] [2019-11-07 00:43:42,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:42,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:42,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736602982] [2019-11-07 00:43:42,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:42,347 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:42,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:42,348 INFO L87 Difference]: Start difference. First operand 618 states and 979 transitions. Second operand 7 states. [2019-11-07 00:43:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:42,457 INFO L93 Difference]: Finished difference Result 1207 states and 1931 transitions. [2019-11-07 00:43:42,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:42,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2019-11-07 00:43:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:42,463 INFO L225 Difference]: With dead ends: 1207 [2019-11-07 00:43:42,463 INFO L226 Difference]: Without dead ends: 612 [2019-11-07 00:43:42,466 INFO L630 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 [2019-11-07 00:43:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-11-07 00:43:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-11-07 00:43:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-11-07 00:43:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 966 transitions. [2019-11-07 00:43:42,494 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 966 transitions. Word has length 142 [2019-11-07 00:43:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:42,494 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 966 transitions. [2019-11-07 00:43:42,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 966 transitions. [2019-11-07 00:43:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:43:42,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:42,501 INFO L410 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] [2019-11-07 00:43:42,501 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 571891073, now seen corresponding path program 1 times [2019-11-07 00:43:42,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:42,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399391875] [2019-11-07 00:43:42,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:42,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399391875] [2019-11-07 00:43:42,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:42,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:42,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697371843] [2019-11-07 00:43:42,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:42,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:42,807 INFO L87 Difference]: Start difference. First operand 612 states and 966 transitions. Second operand 7 states. [2019-11-07 00:43:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:42,904 INFO L93 Difference]: Finished difference Result 1195 states and 1905 transitions. [2019-11-07 00:43:42,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:42,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:43:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:42,910 INFO L225 Difference]: With dead ends: 1195 [2019-11-07 00:43:42,911 INFO L226 Difference]: Without dead ends: 606 [2019-11-07 00:43:42,917 INFO L630 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 [2019-11-07 00:43:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-11-07 00:43:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2019-11-07 00:43:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2019-11-07 00:43:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 953 transitions. [2019-11-07 00:43:42,951 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 953 transitions. Word has length 143 [2019-11-07 00:43:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:42,952 INFO L462 AbstractCegarLoop]: Abstraction has 606 states and 953 transitions. [2019-11-07 00:43:42,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 953 transitions. [2019-11-07 00:43:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:43:42,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:42,959 INFO L410 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] [2019-11-07 00:43:42,959 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2110652197, now seen corresponding path program 1 times [2019-11-07 00:43:42,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:42,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418673196] [2019-11-07 00:43:42,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:43,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418673196] [2019-11-07 00:43:43,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:43,143 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:43,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749534252] [2019-11-07 00:43:43,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:43,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:43,145 INFO L87 Difference]: Start difference. First operand 606 states and 953 transitions. Second operand 7 states. [2019-11-07 00:43:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:43,259 INFO L93 Difference]: Finished difference Result 1183 states and 1879 transitions. [2019-11-07 00:43:43,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:43,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-11-07 00:43:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:43,270 INFO L225 Difference]: With dead ends: 1183 [2019-11-07 00:43:43,270 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:43:43,274 INFO L630 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 [2019-11-07 00:43:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:43:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:43:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:43:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 940 transitions. [2019-11-07 00:43:43,303 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 940 transitions. Word has length 144 [2019-11-07 00:43:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:43,303 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 940 transitions. [2019-11-07 00:43:43,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 940 transitions. [2019-11-07 00:43:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:43:43,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:43,307 INFO L410 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] [2019-11-07 00:43:43,308 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash 945368284, now seen corresponding path program 1 times [2019-11-07 00:43:43,308 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:43,309 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089123223] [2019-11-07 00:43:43,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:43,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089123223] [2019-11-07 00:43:43,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:43,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:43,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413113055] [2019-11-07 00:43:43,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:43,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:43,558 INFO L87 Difference]: Start difference. First operand 600 states and 940 transitions. Second operand 7 states. [2019-11-07 00:43:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:43,644 INFO L93 Difference]: Finished difference Result 1171 states and 1853 transitions. [2019-11-07 00:43:43,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:43,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-11-07 00:43:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:43,660 INFO L225 Difference]: With dead ends: 1171 [2019-11-07 00:43:43,660 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:43:43,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:43:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:43:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:43:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 939 transitions. [2019-11-07 00:43:43,684 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 939 transitions. Word has length 144 [2019-11-07 00:43:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:43,684 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 939 transitions. [2019-11-07 00:43:43,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 939 transitions. [2019-11-07 00:43:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:43:43,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:43,688 INFO L410 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] [2019-11-07 00:43:43,688 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2008719333, now seen corresponding path program 1 times [2019-11-07 00:43:43,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:43,689 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336196256] [2019-11-07 00:43:43,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:43,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336196256] [2019-11-07 00:43:43,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:43,853 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:43,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189688522] [2019-11-07 00:43:43,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:43,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:43,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:43,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:43,855 INFO L87 Difference]: Start difference. First operand 600 states and 939 transitions. Second operand 5 states. [2019-11-07 00:43:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:43,957 INFO L93 Difference]: Finished difference Result 1170 states and 1850 transitions. [2019-11-07 00:43:43,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:43,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-11-07 00:43:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:43,972 INFO L225 Difference]: With dead ends: 1170 [2019-11-07 00:43:43,973 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:43:43,980 INFO L630 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 [2019-11-07 00:43:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:43:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:43:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:43:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 938 transitions. [2019-11-07 00:43:44,016 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 938 transitions. Word has length 145 [2019-11-07 00:43:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:44,018 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 938 transitions. [2019-11-07 00:43:44,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 938 transitions. [2019-11-07 00:43:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:43:44,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:44,030 INFO L410 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] [2019-11-07 00:43:44,031 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1557988425, now seen corresponding path program 1 times [2019-11-07 00:43:44,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:44,033 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116366895] [2019-11-07 00:43:44,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:44,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116366895] [2019-11-07 00:43:44,252 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:44,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:44,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086808954] [2019-11-07 00:43:44,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:44,254 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:44,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:44,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:44,255 INFO L87 Difference]: Start difference. First operand 600 states and 938 transitions. Second operand 5 states. [2019-11-07 00:43:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:44,363 INFO L93 Difference]: Finished difference Result 1170 states and 1848 transitions. [2019-11-07 00:43:44,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:44,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-11-07 00:43:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:44,372 INFO L225 Difference]: With dead ends: 1170 [2019-11-07 00:43:44,373 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:43:44,379 INFO L630 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 [2019-11-07 00:43:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:43:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:43:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:43:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 937 transitions. [2019-11-07 00:43:44,427 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 937 transitions. Word has length 146 [2019-11-07 00:43:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:44,428 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 937 transitions. [2019-11-07 00:43:44,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 937 transitions. [2019-11-07 00:43:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:43:44,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:44,436 INFO L410 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] [2019-11-07 00:43:44,436 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1196360064, now seen corresponding path program 1 times [2019-11-07 00:43:44,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:44,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257210528] [2019-11-07 00:43:44,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:44,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257210528] [2019-11-07 00:43:44,817 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:44,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:44,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736078658] [2019-11-07 00:43:44,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:44,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:44,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:44,818 INFO L87 Difference]: Start difference. First operand 600 states and 937 transitions. Second operand 5 states. [2019-11-07 00:43:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:44,898 INFO L93 Difference]: Finished difference Result 1170 states and 1846 transitions. [2019-11-07 00:43:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:44,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:43:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:44,903 INFO L225 Difference]: With dead ends: 1170 [2019-11-07 00:43:44,904 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:43:44,907 INFO L630 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 [2019-11-07 00:43:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:43:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:43:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:43:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 936 transitions. [2019-11-07 00:43:44,936 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 936 transitions. Word has length 147 [2019-11-07 00:43:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:44,936 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 936 transitions. [2019-11-07 00:43:44,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 936 transitions. [2019-11-07 00:43:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 00:43:44,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:44,940 INFO L410 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] [2019-11-07 00:43:44,941 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1960010702, now seen corresponding path program 1 times [2019-11-07 00:43:44,941 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:44,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95253262] [2019-11-07 00:43:44,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:45,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95253262] [2019-11-07 00:43:45,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:45,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:45,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589213814] [2019-11-07 00:43:45,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:45,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:45,100 INFO L87 Difference]: Start difference. First operand 600 states and 936 transitions. Second operand 5 states. [2019-11-07 00:43:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:45,170 INFO L93 Difference]: Finished difference Result 1170 states and 1844 transitions. [2019-11-07 00:43:45,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:45,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-11-07 00:43:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:45,178 INFO L225 Difference]: With dead ends: 1170 [2019-11-07 00:43:45,179 INFO L226 Difference]: Without dead ends: 600 [2019-11-07 00:43:45,186 INFO L630 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 [2019-11-07 00:43:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-07 00:43:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2019-11-07 00:43:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2019-11-07 00:43:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 935 transitions. [2019-11-07 00:43:45,207 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 935 transitions. Word has length 148 [2019-11-07 00:43:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:45,208 INFO L462 AbstractCegarLoop]: Abstraction has 600 states and 935 transitions. [2019-11-07 00:43:45,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 935 transitions. [2019-11-07 00:43:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 00:43:45,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:45,212 INFO L410 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] [2019-11-07 00:43:45,213 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 629882651, now seen corresponding path program 1 times [2019-11-07 00:43:45,213 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:45,213 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571899978] [2019-11-07 00:43:45,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:45,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571899978] [2019-11-07 00:43:45,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976396722] [2019-11-07 00:43:45,476 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 [2019-11-07 00:43:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:46,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:46,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:43:46,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:46,552 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:46,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-07 00:43:46,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309209819] [2019-11-07 00:43:46,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:46,554 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:46,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:46,555 INFO L87 Difference]: Start difference. First operand 600 states and 935 transitions. Second operand 3 states. [2019-11-07 00:43:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:46,643 INFO L93 Difference]: Finished difference Result 1679 states and 2665 transitions. [2019-11-07 00:43:46,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:46,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 00:43:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:46,652 INFO L225 Difference]: With dead ends: 1679 [2019-11-07 00:43:46,653 INFO L226 Difference]: Without dead ends: 1113 [2019-11-07 00:43:46,656 INFO L630 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 [2019-11-07 00:43:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-11-07 00:43:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1100. [2019-11-07 00:43:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-11-07 00:43:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1733 transitions. [2019-11-07 00:43:46,702 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1733 transitions. Word has length 149 [2019-11-07 00:43:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:46,703 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1733 transitions. [2019-11-07 00:43:46,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1733 transitions. [2019-11-07 00:43:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:43:46,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:46,709 INFO L410 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] [2019-11-07 00:43:46,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:46,917 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -331869422, now seen corresponding path program 1 times [2019-11-07 00:43:46,918 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:46,918 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013006519] [2019-11-07 00:43:46,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:47,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013006519] [2019-11-07 00:43:47,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749588611] [2019-11-07 00:43:47,213 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 [2019-11-07 00:43:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:48,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 3070 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:48,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-07 00:43:48,067 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:48,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:48,226 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-07 00:43:48,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614498366] [2019-11-07 00:43:48,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:48,227 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:48,228 INFO L87 Difference]: Start difference. First operand 1100 states and 1733 transitions. Second operand 3 states. [2019-11-07 00:43:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:48,330 INFO L93 Difference]: Finished difference Result 2679 states and 4263 transitions. [2019-11-07 00:43:48,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:48,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-11-07 00:43:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:48,342 INFO L225 Difference]: With dead ends: 2679 [2019-11-07 00:43:48,343 INFO L226 Difference]: Without dead ends: 1613 [2019-11-07 00:43:48,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2019-11-07 00:43:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1564. [2019-11-07 00:43:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1564 states. [2019-11-07 00:43:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2484 transitions. [2019-11-07 00:43:48,463 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2484 transitions. Word has length 150 [2019-11-07 00:43:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:48,464 INFO L462 AbstractCegarLoop]: Abstraction has 1564 states and 2484 transitions. [2019-11-07 00:43:48,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2484 transitions. [2019-11-07 00:43:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-07 00:43:48,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:48,471 INFO L410 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] [2019-11-07 00:43:48,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:48,683 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash 781263262, now seen corresponding path program 1 times [2019-11-07 00:43:48,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:48,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158656874] [2019-11-07 00:43:48,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:48,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158656874] [2019-11-07 00:43:48,861 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:48,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:48,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415811967] [2019-11-07 00:43:48,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:48,863 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:48,863 INFO L87 Difference]: Start difference. First operand 1564 states and 2484 transitions. Second operand 7 states. [2019-11-07 00:43:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:51,928 INFO L93 Difference]: Finished difference Result 4614 states and 7479 transitions. [2019-11-07 00:43:51,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:51,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 152 [2019-11-07 00:43:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:51,955 INFO L225 Difference]: With dead ends: 4614 [2019-11-07 00:43:51,955 INFO L226 Difference]: Without dead ends: 3084 [2019-11-07 00:43:51,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2019-11-07 00:43:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3014. [2019-11-07 00:43:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3014 states. [2019-11-07 00:43:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 4861 transitions. [2019-11-07 00:43:52,109 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 4861 transitions. Word has length 152 [2019-11-07 00:43:52,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:52,109 INFO L462 AbstractCegarLoop]: Abstraction has 3014 states and 4861 transitions. [2019-11-07 00:43:52,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 4861 transitions. [2019-11-07 00:43:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:52,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:52,117 INFO L410 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] [2019-11-07 00:43:52,117 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1286032454, now seen corresponding path program 1 times [2019-11-07 00:43:52,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:52,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136806463] [2019-11-07 00:43:52,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:52,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136806463] [2019-11-07 00:43:52,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092433729] [2019-11-07 00:43:52,352 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 [2019-11-07 00:43:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:52,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:52,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:43:52,976 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:53,117 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:53,117 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-07 00:43:53,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093563202] [2019-11-07 00:43:53,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:53,121 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:53,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:43:53,122 INFO L87 Difference]: Start difference. First operand 3014 states and 4861 transitions. Second operand 4 states. [2019-11-07 00:43:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:53,353 INFO L93 Difference]: Finished difference Result 6066 states and 9869 transitions. [2019-11-07 00:43:53,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:53,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-07 00:43:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:53,377 INFO L225 Difference]: With dead ends: 6066 [2019-11-07 00:43:53,377 INFO L226 Difference]: Without dead ends: 3086 [2019-11-07 00:43:53,393 INFO L630 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 [2019-11-07 00:43:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2019-11-07 00:43:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 3036. [2019-11-07 00:43:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3036 states. [2019-11-07 00:43:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 4889 transitions. [2019-11-07 00:43:53,555 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 4889 transitions. Word has length 153 [2019-11-07 00:43:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:53,556 INFO L462 AbstractCegarLoop]: Abstraction has 3036 states and 4889 transitions. [2019-11-07 00:43:53,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 4889 transitions. [2019-11-07 00:43:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:53,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:53,563 INFO L410 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] [2019-11-07 00:43:53,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:53,771 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:53,772 INFO L82 PathProgramCache]: Analyzing trace with hash -173329017, now seen corresponding path program 1 times [2019-11-07 00:43:53,772 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:53,772 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963467261] [2019-11-07 00:43:53,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 00:43:53,896 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963467261] [2019-11-07 00:43:53,896 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:53,897 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:53,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133890411] [2019-11-07 00:43:53,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:53,898 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:53,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:53,899 INFO L87 Difference]: Start difference. First operand 3036 states and 4889 transitions. Second operand 4 states. [2019-11-07 00:43:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:54,120 INFO L93 Difference]: Finished difference Result 6032 states and 9786 transitions. [2019-11-07 00:43:54,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:54,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-07 00:43:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:54,142 INFO L225 Difference]: With dead ends: 6032 [2019-11-07 00:43:54,142 INFO L226 Difference]: Without dead ends: 3030 [2019-11-07 00:43:54,158 INFO L630 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 [2019-11-07 00:43:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2019-11-07 00:43:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3020. [2019-11-07 00:43:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3020 states. [2019-11-07 00:43:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 4837 transitions. [2019-11-07 00:43:54,294 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 4837 transitions. Word has length 153 [2019-11-07 00:43:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:54,295 INFO L462 AbstractCegarLoop]: Abstraction has 3020 states and 4837 transitions. [2019-11-07 00:43:54,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 4837 transitions. [2019-11-07 00:43:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:43:54,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:54,301 INFO L410 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] [2019-11-07 00:43:54,301 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash 843287171, now seen corresponding path program 1 times [2019-11-07 00:43:54,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:54,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532298689] [2019-11-07 00:43:54,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 00:43:54,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532298689] [2019-11-07 00:43:54,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114947533] [2019-11-07 00:43:54,474 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 [2019-11-07 00:43:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:55,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 3089 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 00:43:55,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:55,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:43:55,175 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:55,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:43:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-07 00:43:55,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:43:55,517 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 7] total 20 [2019-11-07 00:43:55,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489886178] [2019-11-07 00:43:55,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:43:55,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:43:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2019-11-07 00:43:55,519 INFO L87 Difference]: Start difference. First operand 3020 states and 4837 transitions. Second operand 6 states. [2019-11-07 00:43:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:56,932 INFO L93 Difference]: Finished difference Result 8143 states and 13161 transitions. [2019-11-07 00:43:56,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:43:56,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-11-07 00:43:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:56,972 INFO L225 Difference]: With dead ends: 8143 [2019-11-07 00:43:56,972 INFO L226 Difference]: Without dead ends: 5157 [2019-11-07 00:43:56,991 INFO L630 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 [2019-11-07 00:43:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2019-11-07 00:43:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 5117. [2019-11-07 00:43:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5117 states. [2019-11-07 00:43:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 8056 transitions. [2019-11-07 00:43:57,219 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 8056 transitions. Word has length 153 [2019-11-07 00:43:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:57,219 INFO L462 AbstractCegarLoop]: Abstraction has 5117 states and 8056 transitions. [2019-11-07 00:43:57,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:43:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 8056 transitions. [2019-11-07 00:43:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:43:57,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:57,226 INFO L410 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] [2019-11-07 00:43:57,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:57,434 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2011771696, now seen corresponding path program 1 times [2019-11-07 00:43:57,435 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:57,435 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153194360] [2019-11-07 00:43:57,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-07 00:43:57,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153194360] [2019-11-07 00:43:57,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:57,596 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:57,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998983632] [2019-11-07 00:43:57,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:57,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:57,598 INFO L87 Difference]: Start difference. First operand 5117 states and 8056 transitions. Second operand 7 states. [2019-11-07 00:44:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:00,447 INFO L93 Difference]: Finished difference Result 15270 states and 24549 transitions. [2019-11-07 00:44:00,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:00,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 161 [2019-11-07 00:44:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:00,516 INFO L225 Difference]: With dead ends: 15270 [2019-11-07 00:44:00,516 INFO L226 Difference]: Without dead ends: 10187 [2019-11-07 00:44:00,539 INFO L630 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 [2019-11-07 00:44:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2019-11-07 00:44:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 10103. [2019-11-07 00:44:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10103 states. [2019-11-07 00:44:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 16097 transitions. [2019-11-07 00:44:00,930 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 16097 transitions. Word has length 161 [2019-11-07 00:44:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:00,930 INFO L462 AbstractCegarLoop]: Abstraction has 10103 states and 16097 transitions. [2019-11-07 00:44:00,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 16097 transitions. [2019-11-07 00:44:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-07 00:44:00,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:00,937 INFO L410 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] [2019-11-07 00:44:00,937 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:00,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1810633537, now seen corresponding path program 1 times [2019-11-07 00:44:00,938 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:00,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12704654] [2019-11-07 00:44:00,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:44:01,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12704654] [2019-11-07 00:44:01,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:01,073 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:44:01,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253103935] [2019-11-07 00:44:01,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:44:01,075 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:44:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:44:01,075 INFO L87 Difference]: Start difference. First operand 10103 states and 16097 transitions. Second operand 4 states. [2019-11-07 00:44:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:01,513 INFO L93 Difference]: Finished difference Result 20210 states and 32463 transitions. [2019-11-07 00:44:01,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:44:01,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-11-07 00:44:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:01,587 INFO L225 Difference]: With dead ends: 20210 [2019-11-07 00:44:01,587 INFO L226 Difference]: Without dead ends: 10138 [2019-11-07 00:44:01,622 INFO L630 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 [2019-11-07 00:44:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10138 states. [2019-11-07 00:44:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10138 to 10106. [2019-11-07 00:44:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10106 states. [2019-11-07 00:44:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10106 states to 10106 states and 16059 transitions. [2019-11-07 00:44:01,994 INFO L78 Accepts]: Start accepts. Automaton has 10106 states and 16059 transitions. Word has length 162 [2019-11-07 00:44:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:01,994 INFO L462 AbstractCegarLoop]: Abstraction has 10106 states and 16059 transitions. [2019-11-07 00:44:01,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:44:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10106 states and 16059 transitions. [2019-11-07 00:44:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 00:44:02,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:02,004 INFO L410 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] [2019-11-07 00:44:02,004 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1844590663, now seen corresponding path program 1 times [2019-11-07 00:44:02,005 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:02,005 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725860613] [2019-11-07 00:44:02,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:44:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:44:02,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725860613] [2019-11-07 00:44:02,151 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:44:02,151 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:44:02,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845491825] [2019-11-07 00:44:02,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:44:02,154 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:44:02,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:44:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:44:02,155 INFO L87 Difference]: Start difference. First operand 10106 states and 16059 transitions. Second operand 7 states. [2019-11-07 00:44:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:44:05,724 INFO L93 Difference]: Finished difference Result 30309 states and 49317 transitions. [2019-11-07 00:44:05,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:44:05,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2019-11-07 00:44:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:44:05,868 INFO L225 Difference]: With dead ends: 30309 [2019-11-07 00:44:05,869 INFO L226 Difference]: Without dead ends: 20237 [2019-11-07 00:44:05,911 INFO L630 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 [2019-11-07 00:44:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20237 states. [2019-11-07 00:44:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20237 to 20105. [2019-11-07 00:44:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20105 states. [2019-11-07 00:44:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 32492 transitions. [2019-11-07 00:44:06,693 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 32492 transitions. Word has length 171 [2019-11-07 00:44:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:44:06,694 INFO L462 AbstractCegarLoop]: Abstraction has 20105 states and 32492 transitions. [2019-11-07 00:44:06,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:44:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 32492 transitions. [2019-11-07 00:44:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-11-07 00:44:06,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:44:06,705 INFO L410 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, 1] [2019-11-07 00:44:06,705 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:44:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:44:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1696866579, now seen corresponding path program 1 times [2019-11-07 00:44:06,706 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:44:06,708 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390983774] [2019-11-07 00:44:06,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:44:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat