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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/product-lines/elevator_spec9_product28.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 14:35:17,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 14:35:17,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 14:35:17,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 14:35:17,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 14:35:17,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 14:35:17,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 14:35:17,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 14:35:17,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 14:35:17,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 14:35:17,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 14:35:17,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 14:35:17,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 14:35:17,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 14:35:17,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 14:35:17,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 14:35:17,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 14:35:17,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 14:35:17,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 14:35:17,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 14:35:17,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 14:35:17,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 14:35:17,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 14:35:17,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 14:35:17,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 14:35:17,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 14:35:17,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 14:35:17,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 14:35:17,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 14:35:17,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 14:35:17,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 14:35:17,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 14:35:17,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 14:35:17,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 14:35:17,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 14:35:17,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 14:35:17,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 14:35:17,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 14:35:17,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 14:35:17,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 14:35:17,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 14:35:17,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 14:35:17,220 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 14:35:17,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 14:35:17,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 14:35:17,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 14:35:17,223 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 14:35:17,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 14:35:17,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 14:35:17,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 14:35:17,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 14:35:17,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 14:35:17,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 14:35:17,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 14:35:17,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 14:35:17,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 14:35:17,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 14:35:17,227 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 14:35:17,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 14:35:17,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 14:35:17,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 14:35:17,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 14:35:17,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 14:35:17,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:35:17,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 14:35:17,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 14:35:17,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 14:35:17,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 14:35:17,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 14:35:17,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 14:35:17,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 14:35:17,515 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 14:35:17,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 14:35:17,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 14:35:17,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 14:35:17,534 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 14:35:17,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec9_product28.cil.c [2019-10-07 14:35:17,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9aab6b2/35fa17f8120449d2beb38bb42dc9e2ed/FLAGdf701db9b [2019-10-07 14:35:18,265 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 14:35:18,267 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec9_product28.cil.c [2019-10-07 14:35:18,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9aab6b2/35fa17f8120449d2beb38bb42dc9e2ed/FLAGdf701db9b [2019-10-07 14:35:18,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e9aab6b2/35fa17f8120449d2beb38bb42dc9e2ed [2019-10-07 14:35:18,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 14:35:18,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 14:35:18,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 14:35:18,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 14:35:18,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 14:35:18,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:35:18" (1/1) ... [2019-10-07 14:35:18,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd4125b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:18, skipping insertion in model container [2019-10-07 14:35:18,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:35:18" (1/1) ... [2019-10-07 14:35:18,476 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 14:35:18,546 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 14:35:19,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:35:19,290 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 14:35:19,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:35:19,506 INFO L192 MainTranslator]: Completed translation [2019-10-07 14:35:19,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19 WrapperNode [2019-10-07 14:35:19,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 14:35:19,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 14:35:19,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 14:35:19,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 14:35:19,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... [2019-10-07 14:35:19,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 14:35:19,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 14:35:19,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 14:35:19,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 14:35:19,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:35:19,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 14:35:19,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 14:35:19,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-07 14:35:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-07 14:35:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-07 14:35:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-07 14:35:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-07 14:35:19,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-07 14:35:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-07 14:35:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-07 14:35:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-07 14:35:19,851 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-07 14:35:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-07 14:35:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-07 14:35:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-07 14:35:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-07 14:35:19,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-07 14:35:19,853 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-07 14:35:19,853 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-07 14:35:19,853 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-07 14:35:19,853 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-07 14:35:19,854 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-07 14:35:19,854 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-07 14:35:19,854 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-07 14:35:19,854 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-07 14:35:19,854 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-07 14:35:19,855 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-07 14:35:19,855 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-07 14:35:19,855 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-07 14:35:19,855 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-07 14:35:19,855 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-07 14:35:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-07 14:35:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-07 14:35:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-07 14:35:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-07 14:35:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-07 14:35:19,856 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-07 14:35:19,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-07 14:35:19,857 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-07 14:35:19,857 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-07 14:35:19,857 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-07 14:35:19,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-07 14:35:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-07 14:35:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-10-07 14:35:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-07 14:35:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-10-07 14:35:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-07 14:35:19,858 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-07 14:35:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-07 14:35:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-07 14:35:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-07 14:35:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-07 14:35:19,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-07 14:35:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-07 14:35:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-07 14:35:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-07 14:35:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__1 [2019-10-07 14:35:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__2 [2019-10-07 14:35:19,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__3 [2019-10-07 14:35:19,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification9_spec__4 [2019-10-07 14:35:19,861 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-07 14:35:19,861 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-07 14:35:19,861 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-07 14:35:19,861 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-07 14:35:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-07 14:35:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-07 14:35:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-07 14:35:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-07 14:35:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-07 14:35:19,862 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-07 14:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-07 14:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-07 14:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-07 14:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-07 14:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-07 14:35:19,863 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-07 14:35:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 14:35:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-07 14:35:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-07 14:35:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-07 14:35:19,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-07 14:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 14:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 14:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-07 14:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-07 14:35:19,865 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-07 14:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-07 14:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-07 14:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-07 14:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-07 14:35:19,866 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-07 14:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-07 14:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-07 14:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-07 14:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-07 14:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-07 14:35:19,867 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-07 14:35:19,868 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-07 14:35:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-07 14:35:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-07 14:35:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-07 14:35:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-07 14:35:19,869 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-07 14:35:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-07 14:35:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-07 14:35:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-07 14:35:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-07 14:35:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-07 14:35:19,870 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-07 14:35:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-07 14:35:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-07 14:35:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__2 [2019-10-07 14:35:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-07 14:35:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-07 14:35:19,871 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-07 14:35:19,872 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-07 14:35:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-07 14:35:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-10-07 14:35:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__3 [2019-10-07 14:35:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-10-07 14:35:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 14:35:19,873 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-07 14:35:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-07 14:35:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 14:35:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 14:35:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-07 14:35:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 14:35:19,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-07 14:35:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 14:35:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-07 14:35:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-07 14:35:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-07 14:35:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-07 14:35:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__1 [2019-10-07 14:35:19,876 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification9_spec__4 [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-07 14:35:19,877 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-07 14:35:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-07 14:35:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-07 14:35:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-07 14:35:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-07 14:35:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-07 14:35:19,878 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 14:35:19,879 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-07 14:35:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-07 14:35:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 14:35:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 14:35:19,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 14:35:24,999 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 14:35:24,999 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 14:35:25,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:35:25 BoogieIcfgContainer [2019-10-07 14:35:25,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 14:35:25,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 14:35:25,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 14:35:25,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 14:35:25,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:35:18" (1/3) ... [2019-10-07 14:35:25,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5914fcff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:35:25, skipping insertion in model container [2019-10-07 14:35:25,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:35:19" (2/3) ... [2019-10-07 14:35:25,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5914fcff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:35:25, skipping insertion in model container [2019-10-07 14:35:25,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:35:25" (3/3) ... [2019-10-07 14:35:25,010 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product28.cil.c [2019-10-07 14:35:25,020 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 14:35:25,030 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 14:35:25,041 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 14:35:25,073 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 14:35:25,073 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 14:35:25,074 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 14:35:25,074 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 14:35:25,074 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 14:35:25,074 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 14:35:25,074 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 14:35:25,074 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 14:35:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states. [2019-10-07 14:35:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-07 14:35:25,118 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:25,120 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:25,122 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash -142911324, now seen corresponding path program 1 times [2019-10-07 14:35:25,137 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:25,137 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:25,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:25,138 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:35:25,764 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:25,764 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:25,765 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 14:35:25,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 14:35:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 14:35:25,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 14:35:25,783 INFO L87 Difference]: Start difference. First operand 582 states. Second operand 2 states. [2019-10-07 14:35:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:25,852 INFO L93 Difference]: Finished difference Result 479 states and 707 transitions. [2019-10-07 14:35:25,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 14:35:25,854 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 74 [2019-10-07 14:35:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:25,894 INFO L225 Difference]: With dead ends: 479 [2019-10-07 14:35:25,894 INFO L226 Difference]: Without dead ends: 445 [2019-10-07 14:35:25,903 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 14:35:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2019-10-07 14:35:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2019-10-07 14:35:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-07 14:35:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 656 transitions. [2019-10-07 14:35:26,025 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 656 transitions. Word has length 74 [2019-10-07 14:35:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:26,027 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 656 transitions. [2019-10-07 14:35:26,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 14:35:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 656 transitions. [2019-10-07 14:35:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-07 14:35:26,032 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:26,033 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:26,033 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1370699530, now seen corresponding path program 1 times [2019-10-07 14:35:26,095 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:26,095 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:26,095 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:26,095 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:26,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:35:26,413 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:26,413 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:26,413 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 14:35:26,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:35:26,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:35:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 14:35:26,417 INFO L87 Difference]: Start difference. First operand 445 states and 656 transitions. Second operand 6 states. [2019-10-07 14:35:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:29,603 INFO L93 Difference]: Finished difference Result 1350 states and 2056 transitions. [2019-10-07 14:35:29,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:35:29,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2019-10-07 14:35:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:29,613 INFO L225 Difference]: With dead ends: 1350 [2019-10-07 14:35:29,614 INFO L226 Difference]: Without dead ends: 947 [2019-10-07 14:35:29,620 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:35:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2019-10-07 14:35:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 852. [2019-10-07 14:35:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2019-10-07 14:35:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1298 transitions. [2019-10-07 14:35:29,696 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1298 transitions. Word has length 75 [2019-10-07 14:35:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:29,697 INFO L462 AbstractCegarLoop]: Abstraction has 852 states and 1298 transitions. [2019-10-07 14:35:29,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:35:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1298 transitions. [2019-10-07 14:35:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-07 14:35:29,710 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:29,710 INFO L385 BasicCegarLoop]: trace histogram [3, 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] [2019-10-07 14:35:29,710 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1887671256, now seen corresponding path program 1 times [2019-10-07 14:35:29,711 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:29,711 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:29,712 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:29,712 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:35:29,982 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:29,982 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:29,982 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-07 14:35:29,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-07 14:35:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-07 14:35:29,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:35:29,984 INFO L87 Difference]: Start difference. First operand 852 states and 1298 transitions. Second operand 12 states. [2019-10-07 14:35:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:37,522 INFO L93 Difference]: Finished difference Result 2573 states and 3928 transitions. [2019-10-07 14:35:37,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-07 14:35:37,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 122 [2019-10-07 14:35:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:37,548 INFO L225 Difference]: With dead ends: 2573 [2019-10-07 14:35:37,548 INFO L226 Difference]: Without dead ends: 1763 [2019-10-07 14:35:37,555 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-10-07 14:35:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2019-10-07 14:35:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1704. [2019-10-07 14:35:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2019-10-07 14:35:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2577 transitions. [2019-10-07 14:35:37,786 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2577 transitions. Word has length 122 [2019-10-07 14:35:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:37,790 INFO L462 AbstractCegarLoop]: Abstraction has 1704 states and 2577 transitions. [2019-10-07 14:35:37,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-07 14:35:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2577 transitions. [2019-10-07 14:35:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-07 14:35:37,805 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:37,806 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:37,807 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 525588367, now seen corresponding path program 1 times [2019-10-07 14:35:37,808 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:37,808 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:37,808 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:37,808 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:35:38,049 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:38,050 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:38,050 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:35:38,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:35:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:35:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:38,051 INFO L87 Difference]: Start difference. First operand 1704 states and 2577 transitions. Second operand 3 states. [2019-10-07 14:35:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:38,221 INFO L93 Difference]: Finished difference Result 4294 states and 6600 transitions. [2019-10-07 14:35:38,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:35:38,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-07 14:35:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:38,243 INFO L225 Difference]: With dead ends: 4294 [2019-10-07 14:35:38,244 INFO L226 Difference]: Without dead ends: 2632 [2019-10-07 14:35:38,253 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2019-10-07 14:35:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2615. [2019-10-07 14:35:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2019-10-07 14:35:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3997 transitions. [2019-10-07 14:35:38,437 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3997 transitions. Word has length 123 [2019-10-07 14:35:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:38,440 INFO L462 AbstractCegarLoop]: Abstraction has 2615 states and 3997 transitions. [2019-10-07 14:35:38,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:35:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3997 transitions. [2019-10-07 14:35:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-07 14:35:38,454 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:38,454 INFO L385 BasicCegarLoop]: trace histogram [3, 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] [2019-10-07 14:35:38,454 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -888024506, now seen corresponding path program 1 times [2019-10-07 14:35:38,455 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:38,455 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:38,456 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:38,456 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:35:38,654 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:38,654 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:38,654 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:35:38,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:35:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:35:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:38,656 INFO L87 Difference]: Start difference. First operand 2615 states and 3997 transitions. Second operand 3 states. [2019-10-07 14:35:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:38,873 INFO L93 Difference]: Finished difference Result 7028 states and 10970 transitions. [2019-10-07 14:35:38,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:35:38,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-07 14:35:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:38,908 INFO L225 Difference]: With dead ends: 7028 [2019-10-07 14:35:38,908 INFO L226 Difference]: Without dead ends: 4456 [2019-10-07 14:35:38,922 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2019-10-07 14:35:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4438. [2019-10-07 14:35:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4438 states. [2019-10-07 14:35:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 6895 transitions. [2019-10-07 14:35:39,180 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 6895 transitions. Word has length 124 [2019-10-07 14:35:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:39,181 INFO L462 AbstractCegarLoop]: Abstraction has 4438 states and 6895 transitions. [2019-10-07 14:35:39,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:35:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 6895 transitions. [2019-10-07 14:35:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-07 14:35:39,187 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:39,187 INFO L385 BasicCegarLoop]: trace histogram [3, 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] [2019-10-07 14:35:39,188 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:39,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:39,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1760346703, now seen corresponding path program 1 times [2019-10-07 14:35:39,188 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:39,189 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:39,189 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:39,189 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:35:39,494 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:39,494 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:39,494 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:35:39,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:35:39,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:35:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:39,498 INFO L87 Difference]: Start difference. First operand 4438 states and 6895 transitions. Second operand 3 states. [2019-10-07 14:35:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:39,802 INFO L93 Difference]: Finished difference Result 12497 states and 20026 transitions. [2019-10-07 14:35:39,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:35:39,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-07 14:35:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:39,892 INFO L225 Difference]: With dead ends: 12497 [2019-10-07 14:35:39,892 INFO L226 Difference]: Without dead ends: 8104 [2019-10-07 14:35:39,923 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8104 states. [2019-10-07 14:35:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8104 to 8085. [2019-10-07 14:35:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8085 states. [2019-10-07 14:35:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 12902 transitions. [2019-10-07 14:35:40,439 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 12902 transitions. Word has length 125 [2019-10-07 14:35:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:40,441 INFO L462 AbstractCegarLoop]: Abstraction has 8085 states and 12902 transitions. [2019-10-07 14:35:40,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:35:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 12902 transitions. [2019-10-07 14:35:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-07 14:35:40,447 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:40,447 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:40,447 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1262440168, now seen corresponding path program 1 times [2019-10-07 14:35:40,448 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:40,448 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:40,448 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:40,449 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:35:40,719 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:40,719 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:40,719 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:35:40,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:35:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:35:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:40,721 INFO L87 Difference]: Start difference. First operand 8085 states and 12902 transitions. Second operand 3 states. [2019-10-07 14:35:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:41,315 INFO L93 Difference]: Finished difference Result 23436 states and 39221 transitions. [2019-10-07 14:35:41,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:35:41,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-10-07 14:35:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:41,461 INFO L225 Difference]: With dead ends: 23436 [2019-10-07 14:35:41,461 INFO L226 Difference]: Without dead ends: 15400 [2019-10-07 14:35:41,517 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15400 states. [2019-10-07 14:35:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15400 to 15380. [2019-10-07 14:35:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15380 states. [2019-10-07 14:35:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15380 states to 15380 states and 25645 transitions. [2019-10-07 14:35:42,853 INFO L78 Accepts]: Start accepts. Automaton has 15380 states and 25645 transitions. Word has length 126 [2019-10-07 14:35:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:42,853 INFO L462 AbstractCegarLoop]: Abstraction has 15380 states and 25645 transitions. [2019-10-07 14:35:42,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:35:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 15380 states and 25645 transitions. [2019-10-07 14:35:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-07 14:35:42,857 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:42,858 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:42,858 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:42,859 INFO L82 PathProgramCache]: Analyzing trace with hash 479556563, now seen corresponding path program 1 times [2019-10-07 14:35:42,859 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:42,859 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:42,859 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:42,859 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-07 14:35:43,009 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:43,009 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:43,009 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:35:43,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:35:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:35:43,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:43,011 INFO L87 Difference]: Start difference. First operand 15380 states and 25645 transitions. Second operand 3 states. [2019-10-07 14:35:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:43,422 INFO L93 Difference]: Finished difference Result 16313 states and 27498 transitions. [2019-10-07 14:35:43,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:35:43,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2019-10-07 14:35:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:43,562 INFO L225 Difference]: With dead ends: 16313 [2019-10-07 14:35:43,563 INFO L226 Difference]: Without dead ends: 16300 [2019-10-07 14:35:43,582 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:35:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16300 states. [2019-10-07 14:35:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16300 to 16285. [2019-10-07 14:35:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16285 states. [2019-10-07 14:35:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16285 states to 16285 states and 27449 transitions. [2019-10-07 14:35:45,466 INFO L78 Accepts]: Start accepts. Automaton has 16285 states and 27449 transitions. Word has length 127 [2019-10-07 14:35:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:45,467 INFO L462 AbstractCegarLoop]: Abstraction has 16285 states and 27449 transitions. [2019-10-07 14:35:45,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:35:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 16285 states and 27449 transitions. [2019-10-07 14:35:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-07 14:35:45,477 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:45,477 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:45,478 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:45,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:45,478 INFO L82 PathProgramCache]: Analyzing trace with hash 667088604, now seen corresponding path program 1 times [2019-10-07 14:35:45,478 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:45,479 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:45,479 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:45,479 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-07 14:35:45,699 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:45,699 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:45,699 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:35:45,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:35:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:35:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:35:45,701 INFO L87 Difference]: Start difference. First operand 16285 states and 27449 transitions. Second operand 5 states. [2019-10-07 14:35:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:46,377 INFO L93 Difference]: Finished difference Result 32743 states and 56884 transitions. [2019-10-07 14:35:46,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:35:46,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2019-10-07 14:35:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:46,479 INFO L225 Difference]: With dead ends: 32743 [2019-10-07 14:35:46,479 INFO L226 Difference]: Without dead ends: 16501 [2019-10-07 14:35:46,573 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:35:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16501 states. [2019-10-07 14:35:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16501 to 16465. [2019-10-07 14:35:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16465 states. [2019-10-07 14:35:47,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16465 states to 16465 states and 27629 transitions. [2019-10-07 14:35:47,470 INFO L78 Accepts]: Start accepts. Automaton has 16465 states and 27629 transitions. Word has length 196 [2019-10-07 14:35:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:47,471 INFO L462 AbstractCegarLoop]: Abstraction has 16465 states and 27629 transitions. [2019-10-07 14:35:47,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:35:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 16465 states and 27629 transitions. [2019-10-07 14:35:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-07 14:35:47,481 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:47,481 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:47,481 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1637418137, now seen corresponding path program 1 times [2019-10-07 14:35:47,482 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:47,482 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:47,482 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:47,482 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-07 14:35:47,921 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:47,921 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:35:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:35:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:48,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 3724 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:35:48,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:35:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-07 14:35:48,739 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:35:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-07 14:35:49,545 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:35:49,545 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-07 14:35:49,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:35:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:35:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:35:49,548 INFO L87 Difference]: Start difference. First operand 16465 states and 27629 transitions. Second operand 4 states. [2019-10-07 14:35:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:51,031 INFO L93 Difference]: Finished difference Result 33589 states and 58593 transitions. [2019-10-07 14:35:51,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:35:51,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2019-10-07 14:35:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:51,182 INFO L225 Difference]: With dead ends: 33589 [2019-10-07 14:35:51,182 INFO L226 Difference]: Without dead ends: 17167 [2019-10-07 14:35:51,302 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 401 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:35:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17167 states. [2019-10-07 14:35:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17167 to 17167. [2019-10-07 14:35:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17167 states. [2019-10-07 14:35:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17167 states to 17167 states and 28943 transitions. [2019-10-07 14:35:52,618 INFO L78 Accepts]: Start accepts. Automaton has 17167 states and 28943 transitions. Word has length 201 [2019-10-07 14:35:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:52,619 INFO L462 AbstractCegarLoop]: Abstraction has 17167 states and 28943 transitions. [2019-10-07 14:35:52,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:35:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17167 states and 28943 transitions. [2019-10-07 14:35:52,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-07 14:35:52,629 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:52,629 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:52,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:35:52,838 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1142595230, now seen corresponding path program 1 times [2019-10-07 14:35:52,839 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:52,840 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:52,840 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:52,840 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-07 14:35:53,093 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:53,093 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:35:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:35:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:54,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 3729 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:35:54,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:35:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 14:35:54,217 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:35:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-07 14:35:54,685 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:35:54,686 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-07 14:35:54,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:35:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:35:54,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:35:54,688 INFO L87 Difference]: Start difference. First operand 17167 states and 28943 transitions. Second operand 4 states. [2019-10-07 14:35:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:35:55,562 INFO L93 Difference]: Finished difference Result 34993 states and 61202 transitions. [2019-10-07 14:35:55,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:35:55,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 206 [2019-10-07 14:35:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:35:55,687 INFO L225 Difference]: With dead ends: 34993 [2019-10-07 14:35:55,688 INFO L226 Difference]: Without dead ends: 17869 [2019-10-07 14:35:55,752 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 409 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:35:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17869 states. [2019-10-07 14:35:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17869 to 17869. [2019-10-07 14:35:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17869 states. [2019-10-07 14:35:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17869 states to 17869 states and 30257 transitions. [2019-10-07 14:35:56,931 INFO L78 Accepts]: Start accepts. Automaton has 17869 states and 30257 transitions. Word has length 206 [2019-10-07 14:35:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:35:56,933 INFO L462 AbstractCegarLoop]: Abstraction has 17869 states and 30257 transitions. [2019-10-07 14:35:56,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:35:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17869 states and 30257 transitions. [2019-10-07 14:35:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-07 14:35:56,945 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:35:56,946 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:35:57,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:35:57,163 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:35:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:35:57,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1408605592, now seen corresponding path program 1 times [2019-10-07 14:35:57,164 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:35:57,164 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:57,164 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:57,164 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:35:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:35:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:35:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-10-07 14:35:57,489 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:35:57,489 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:35:57,489 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:35:57,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:35:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:35:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:35:57,491 INFO L87 Difference]: Start difference. First operand 17869 states and 30257 transitions. Second operand 5 states. [2019-10-07 14:36:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:02,140 INFO L93 Difference]: Finished difference Result 56854 states and 101032 transitions. [2019-10-07 14:36:02,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:36:02,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2019-10-07 14:36:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:02,420 INFO L225 Difference]: With dead ends: 56854 [2019-10-07 14:36:02,420 INFO L226 Difference]: Without dead ends: 39028 [2019-10-07 14:36:02,488 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:36:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39028 states. [2019-10-07 14:36:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39028 to 38602. [2019-10-07 14:36:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38602 states. [2019-10-07 14:36:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38602 states to 38602 states and 67977 transitions. [2019-10-07 14:36:05,268 INFO L78 Accepts]: Start accepts. Automaton has 38602 states and 67977 transitions. Word has length 232 [2019-10-07 14:36:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:05,269 INFO L462 AbstractCegarLoop]: Abstraction has 38602 states and 67977 transitions. [2019-10-07 14:36:05,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:36:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 38602 states and 67977 transitions. [2019-10-07 14:36:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-07 14:36:05,283 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:05,284 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:05,284 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:05,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:05,285 INFO L82 PathProgramCache]: Analyzing trace with hash 438136402, now seen corresponding path program 1 times [2019-10-07 14:36:05,285 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:05,285 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:05,286 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:05,286 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-07 14:36:05,493 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:05,493 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:36:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:06,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 3733 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:36:06,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:36:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-07 14:36:06,422 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:36:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-07 14:36:06,904 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:36:06,904 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-07 14:36:06,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:36:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:36:06,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:36:06,905 INFO L87 Difference]: Start difference. First operand 38602 states and 67977 transitions. Second operand 4 states. [2019-10-07 14:36:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:08,232 INFO L93 Difference]: Finished difference Result 79189 states and 146415 transitions. [2019-10-07 14:36:08,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:36:08,233 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2019-10-07 14:36:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:08,504 INFO L225 Difference]: With dead ends: 79189 [2019-10-07 14:36:08,505 INFO L226 Difference]: Without dead ends: 40630 [2019-10-07 14:36:08,647 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:36:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40630 states. [2019-10-07 14:36:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40630 to 40630. [2019-10-07 14:36:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40630 states. [2019-10-07 14:36:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40630 states to 40630 states and 71773 transitions. [2019-10-07 14:36:13,227 INFO L78 Accepts]: Start accepts. Automaton has 40630 states and 71773 transitions. Word has length 210 [2019-10-07 14:36:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:13,228 INFO L462 AbstractCegarLoop]: Abstraction has 40630 states and 71773 transitions. [2019-10-07 14:36:13,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:36:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 40630 states and 71773 transitions. [2019-10-07 14:36:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-07 14:36:13,238 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:13,239 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:13,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:13,448 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash -572333957, now seen corresponding path program 1 times [2019-10-07 14:36:13,448 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:13,449 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:13,449 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:13,449 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-07 14:36:13,653 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:13,654 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:36:13,654 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:36:13,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:36:13,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:36:13,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:36:13,655 INFO L87 Difference]: Start difference. First operand 40630 states and 71773 transitions. Second operand 5 states. [2019-10-07 14:36:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:19,105 INFO L93 Difference]: Finished difference Result 127996 states and 240831 transitions. [2019-10-07 14:36:19,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:36:19,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 235 [2019-10-07 14:36:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:19,712 INFO L225 Difference]: With dead ends: 127996 [2019-10-07 14:36:19,712 INFO L226 Difference]: Without dead ends: 87409 [2019-10-07 14:36:19,883 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:36:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87409 states. [2019-10-07 14:36:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87409 to 86103. [2019-10-07 14:36:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86103 states. [2019-10-07 14:36:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86103 states to 86103 states and 158940 transitions. [2019-10-07 14:36:26,366 INFO L78 Accepts]: Start accepts. Automaton has 86103 states and 158940 transitions. Word has length 235 [2019-10-07 14:36:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:26,366 INFO L462 AbstractCegarLoop]: Abstraction has 86103 states and 158940 transitions. [2019-10-07 14:36:26,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:36:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 86103 states and 158940 transitions. [2019-10-07 14:36:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-07 14:36:26,377 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:26,377 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:26,377 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1859322905, now seen corresponding path program 1 times [2019-10-07 14:36:26,378 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:26,378 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:26,379 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:26,379 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-07 14:36:26,553 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:26,553 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:36:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:27,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 3736 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:36:27,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:36:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-07 14:36:27,553 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:36:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-07 14:36:28,377 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:36:28,377 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-07 14:36:28,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:36:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:36:28,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:36:28,380 INFO L87 Difference]: Start difference. First operand 86103 states and 158940 transitions. Second operand 4 states. [2019-10-07 14:36:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:31,155 INFO L93 Difference]: Finished difference Result 176843 states and 347323 transitions. [2019-10-07 14:36:31,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:36:31,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2019-10-07 14:36:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:31,537 INFO L225 Difference]: With dead ends: 176843 [2019-10-07 14:36:31,537 INFO L226 Difference]: Without dead ends: 90783 [2019-10-07 14:36:31,758 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 423 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:36:31,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90783 states. [2019-10-07 14:36:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90783 to 90783. [2019-10-07 14:36:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90783 states. [2019-10-07 14:36:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90783 states to 90783 states and 167700 transitions. [2019-10-07 14:36:39,162 INFO L78 Accepts]: Start accepts. Automaton has 90783 states and 167700 transitions. Word has length 213 [2019-10-07 14:36:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:39,162 INFO L462 AbstractCegarLoop]: Abstraction has 90783 states and 167700 transitions. [2019-10-07 14:36:39,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:36:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 90783 states and 167700 transitions. [2019-10-07 14:36:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-07 14:36:39,170 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:39,171 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:39,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:39,383 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:39,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1780362827, now seen corresponding path program 1 times [2019-10-07 14:36:39,384 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:39,384 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:39,384 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:39,384 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-07 14:36:39,637 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:39,637 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:36:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:40,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 3732 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 14:36:40,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:36:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-07 14:36:40,558 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:36:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-07 14:36:41,416 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:36:41,416 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [9] total 17 [2019-10-07 14:36:41,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 14:36:41,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 14:36:41,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-07 14:36:41,418 INFO L87 Difference]: Start difference. First operand 90783 states and 167700 transitions. Second operand 10 states. [2019-10-07 14:36:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:36:48,729 INFO L93 Difference]: Finished difference Result 215948 states and 406930 transitions. [2019-10-07 14:36:48,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-07 14:36:48,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 215 [2019-10-07 14:36:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:36:49,296 INFO L225 Difference]: With dead ends: 215948 [2019-10-07 14:36:49,297 INFO L226 Difference]: Without dead ends: 125224 [2019-10-07 14:36:49,522 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 427 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-07 14:36:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125224 states. [2019-10-07 14:36:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125224 to 124844. [2019-10-07 14:36:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124844 states. [2019-10-07 14:36:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124844 states to 124844 states and 234384 transitions. [2019-10-07 14:36:55,297 INFO L78 Accepts]: Start accepts. Automaton has 124844 states and 234384 transitions. Word has length 215 [2019-10-07 14:36:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:36:55,298 INFO L462 AbstractCegarLoop]: Abstraction has 124844 states and 234384 transitions. [2019-10-07 14:36:55,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 14:36:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 124844 states and 234384 transitions. [2019-10-07 14:36:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-07 14:36:55,307 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:36:55,308 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:36:55,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:36:55,517 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:36:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:36:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1744048555, now seen corresponding path program 1 times [2019-10-07 14:36:55,518 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:36:55,519 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:55,519 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:55,520 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:36:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:36:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:36:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-07 14:36:55,698 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:36:55,698 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:36:55,699 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:36:55,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:36:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:36:55,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:36:55,700 INFO L87 Difference]: Start difference. First operand 124844 states and 234384 transitions. Second operand 5 states. [2019-10-07 14:37:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:37:10,406 INFO L93 Difference]: Finished difference Result 387851 states and 805828 transitions. [2019-10-07 14:37:10,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:37:10,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-07 14:37:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:37:11,944 INFO L225 Difference]: With dead ends: 387851 [2019-10-07 14:37:11,944 INFO L226 Difference]: Without dead ends: 263051 [2019-10-07 14:37:12,292 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:37:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263051 states. [2019-10-07 14:37:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263051 to 259311. [2019-10-07 14:37:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259311 states. [2019-10-07 14:37:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259311 states to 259311 states and 521338 transitions. [2019-10-07 14:37:34,839 INFO L78 Accepts]: Start accepts. Automaton has 259311 states and 521338 transitions. Word has length 240 [2019-10-07 14:37:34,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:37:34,840 INFO L462 AbstractCegarLoop]: Abstraction has 259311 states and 521338 transitions. [2019-10-07 14:37:34,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:37:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 259311 states and 521338 transitions. [2019-10-07 14:37:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-07 14:37:34,848 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:37:34,848 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:37:34,849 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:37:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:37:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1567298769, now seen corresponding path program 1 times [2019-10-07 14:37:34,849 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:37:34,849 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:37:34,850 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:37:34,850 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:37:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:37:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:37:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-07 14:37:35,062 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:37:35,063 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:37:35,063 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:37:35,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:37:35,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:37:35,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:37:35,064 INFO L87 Difference]: Start difference. First operand 259311 states and 521338 transitions. Second operand 5 states. [2019-10-07 14:38:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:38:07,100 INFO L93 Difference]: Finished difference Result 812863 states and 1867164 transitions. [2019-10-07 14:38:07,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 14:38:07,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-07 14:38:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:38:23,784 INFO L225 Difference]: With dead ends: 812863 [2019-10-07 14:38:23,784 INFO L226 Difference]: Without dead ends: 553596 [2019-10-07 14:38:24,649 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:38:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553596 states. [2019-10-07 14:39:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553596 to 544314. [2019-10-07 14:39:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544314 states. [2019-10-07 14:39:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544314 states to 544314 states and 1199540 transitions. [2019-10-07 14:39:48,221 INFO L78 Accepts]: Start accepts. Automaton has 544314 states and 1199540 transitions. Word has length 240 [2019-10-07 14:39:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:39:48,221 INFO L462 AbstractCegarLoop]: Abstraction has 544314 states and 1199540 transitions. [2019-10-07 14:39:48,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:39:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 544314 states and 1199540 transitions. [2019-10-07 14:39:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-07 14:39:48,227 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:39:48,227 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:39:48,228 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:39:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:39:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1845752683, now seen corresponding path program 1 times [2019-10-07 14:39:48,228 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:39:48,228 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:39:48,228 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:39:48,228 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:39:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:39:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:39:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-07 14:39:48,410 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:39:48,410 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:39:48,410 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:39:48,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:39:48,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:39:48,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:39:48,411 INFO L87 Difference]: Start difference. First operand 544314 states and 1199540 transitions. Second operand 5 states.