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_spec13_product29.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:01:49,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:01:49,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:01:49,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:01:49,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:01:49,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:01:49,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:01:49,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:01:49,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:01:49,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:01:49,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:01:49,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:01:49,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:01:49,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:01:49,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:01:49,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:01:49,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:01:49,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:01:49,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:01:49,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:01:49,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:01:49,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:01:49,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:01:49,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:01:49,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:01:49,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:01:49,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:01:49,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:01:49,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:01:49,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:01:49,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:01:49,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:01:49,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:01:49,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:01:49,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:01:49,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:01:49,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:01:49,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:01:49,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:01:49,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:01:49,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:01:49,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:01:49,616 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:01:49,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:01:49,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:01:49,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:01:49,618 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:01:49,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:01:49,618 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:01:49,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:01:49,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:01:49,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:01:49,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:01:49,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:01:49,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:01:49,619 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:01:49,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:01:49,620 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:01:49,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:01:49,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:01:49,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:01:49,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:01:49,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:01:49,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:49,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:01:49,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:01:49,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:01:49,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:01:49,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:01:49,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:01:49,623 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 [2019-10-13 23:01:49,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:01:49,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:01:49,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:01:49,951 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:01:49,952 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:01:49,952 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-13 23:01:50,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06c1c4ae/5593c3ef35b94d13804835334ebd95e5/FLAG4d664f9ce [2019-10-13 23:01:50,668 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:01:50,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec13_product29.cil.c [2019-10-13 23:01:50,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06c1c4ae/5593c3ef35b94d13804835334ebd95e5/FLAG4d664f9ce [2019-10-13 23:01:50,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06c1c4ae/5593c3ef35b94d13804835334ebd95e5 [2019-10-13 23:01:50,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:01:50,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:01:50,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:50,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:01:50,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:01:50,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b14516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:50, skipping insertion in model container [2019-10-13 23:01:50,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:01:50" (1/1) ... [2019-10-13 23:01:50,901 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:01:50,974 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:01:51,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:51,772 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:01:51,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:01:51,939 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:01:51,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51 WrapperNode [2019-10-13 23:01:51,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:01:51,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:01:51,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:01:51,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:01:51,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:51,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:51,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:51,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:52,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:52,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:52,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... [2019-10-13 23:01:52,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:01:52,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:01:52,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:01:52,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:01:52,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:01:52,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:01:52,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:01:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 23:01:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 23:01:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 23:01:52,208 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 23:01:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 23:01:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 23:01:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 23:01:52,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 23:01:52,210 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 23:01:52,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 23:01:52,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 23:01:52,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 23:01:52,210 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 23:01:52,211 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 23:01:52,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 23:01:52,212 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 23:01:52,212 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 23:01:52,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 23:01:52,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 23:01:52,212 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 23:01:52,212 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 23:01:52,213 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 23:01:52,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 23:01:52,213 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 23:01:52,213 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 23:01:52,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 23:01:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 23:01:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 23:01:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 23:01:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:01:52,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 23:01:52,215 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 23:01:52,216 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 23:01:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 23:01:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 23:01:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 23:01:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 23:01:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 23:01:52,217 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 23:01:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 23:01:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 23:01:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 23:01:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 23:01:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 23:01:52,218 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 23:01:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 23:01:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 23:01:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 23:01:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:01:52,219 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 23:01:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 23:01:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 23:01:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 23:01:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:52,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 23:01:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 23:01:52,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 23:01:52,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:01:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:01:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 23:01:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 23:01:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 23:01:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 23:01:52,222 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 23:01:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 23:01:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 23:01:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 23:01:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 23:01:52,223 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 23:01:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 23:01:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 23:01:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 23:01:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 23:01:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 23:01:52,224 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 23:01:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 23:01:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 23:01:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 23:01:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 23:01:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 23:01:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 23:01:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 23:01:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 23:01:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 23:01:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 23:01:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 23:01:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 23:01:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 23:01:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 23:01:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 23:01:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 23:01:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 23:01:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 23:01:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 23:01:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 23:01:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 23:01:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 23:01:52,228 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 23:01:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 23:01:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 23:01:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 23:01:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 23:01:52,229 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 23:01:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 23:01:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__1 [2019-10-13 23:01:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification13_spec__2 [2019-10-13 23:01:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:01:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 23:01:52,230 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 23:01:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 23:01:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 23:01:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 23:01:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 23:01:52,231 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 23:01:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 23:01:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 23:01:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 23:01:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 23:01:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 23:01:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 23:01:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 23:01:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 23:01:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 23:01:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 23:01:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 23:01:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 23:01:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:01:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 23:01:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 23:01:52,234 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 23:01:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 23:01:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 23:01:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 23:01:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 23:01:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:01:52,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 23:01:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 23:01:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:01:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 23:01:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 23:01:52,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:01:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 23:01:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 23:01:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 23:01:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:01:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:01:52,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:01:56,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:01:56,759 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 23:01:56,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:56 BoogieIcfgContainer [2019-10-13 23:01:56,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:01:56,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:01:56,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:01:56,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:01:56,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:01:50" (1/3) ... [2019-10-13 23:01:56,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aeeb87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:56, skipping insertion in model container [2019-10-13 23:01:56,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:01:51" (2/3) ... [2019-10-13 23:01:56,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aeeb87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:01:56, skipping insertion in model container [2019-10-13 23:01:56,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:01:56" (3/3) ... [2019-10-13 23:01:56,771 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2019-10-13 23:01:56,781 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:01:56,793 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:01:56,804 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:01:56,852 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:01:56,852 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:01:56,852 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:01:56,852 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:01:56,852 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:01:56,852 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:01:56,853 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:01:56,853 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:01:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states. [2019-10-13 23:01:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 23:01:56,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:56,938 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:56,940 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:56,948 INFO L82 PathProgramCache]: Analyzing trace with hash 882516267, now seen corresponding path program 1 times [2019-10-13 23:01:56,955 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:56,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349559864] [2019-10-13 23:01:56,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:56,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:56,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:01:57,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349559864] [2019-10-13 23:01:57,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508749964] [2019-10-13 23:01:57,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:58,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 2929 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 23:01:58,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:01:58,356 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:01:58,489 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:01:58,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 2 [2019-10-13 23:01:58,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596303249] [2019-10-13 23:01:58,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:01:58,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:58,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:01:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:01:58,511 INFO L87 Difference]: Start difference. First operand 594 states. Second operand 2 states. [2019-10-13 23:01:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:58,620 INFO L93 Difference]: Finished difference Result 938 states and 1428 transitions. [2019-10-13 23:01:58,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:01:58,622 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 127 [2019-10-13 23:01:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:58,659 INFO L225 Difference]: With dead ends: 938 [2019-10-13 23:01:58,664 INFO L226 Difference]: Without dead ends: 477 [2019-10-13 23:01:58,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:01:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2019-10-13 23:01:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2019-10-13 23:01:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-10-13 23:01:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 710 transitions. [2019-10-13 23:01:58,773 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 710 transitions. Word has length 127 [2019-10-13 23:01:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:58,776 INFO L462 AbstractCegarLoop]: Abstraction has 477 states and 710 transitions. [2019-10-13 23:01:58,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:01:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 710 transitions. [2019-10-13 23:01:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 23:01:58,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:58,784 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:58,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:58,992 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1605727189, now seen corresponding path program 1 times [2019-10-13 23:01:58,993 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:58,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018807595] [2019-10-13 23:01:58,994 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:58,994 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:58,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:01:59,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018807595] [2019-10-13 23:01:59,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:01:59,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:01:59,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81011231] [2019-10-13 23:01:59,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:01:59,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:01:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:01:59,396 INFO L87 Difference]: Start difference. First operand 477 states and 710 transitions. Second operand 7 states. [2019-10-13 23:01:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:59,593 INFO L93 Difference]: Finished difference Result 927 states and 1402 transitions. [2019-10-13 23:01:59,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:01:59,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2019-10-13 23:01:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:59,599 INFO L225 Difference]: With dead ends: 927 [2019-10-13 23:01:59,599 INFO L226 Difference]: Without dead ends: 487 [2019-10-13 23:01:59,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:01:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2019-10-13 23:01:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 484. [2019-10-13 23:01:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-10-13 23:01:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 720 transitions. [2019-10-13 23:01:59,647 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 720 transitions. Word has length 127 [2019-10-13 23:01:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:59,651 INFO L462 AbstractCegarLoop]: Abstraction has 484 states and 720 transitions. [2019-10-13 23:01:59,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:01:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 720 transitions. [2019-10-13 23:01:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 23:01:59,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:59,660 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:01:59,660 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash 795441007, now seen corresponding path program 1 times [2019-10-13 23:01:59,662 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:59,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974561386] [2019-10-13 23:01:59,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:59,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:59,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:01:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:01:59,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974561386] [2019-10-13 23:01:59,875 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:01:59,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:01:59,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421498605] [2019-10-13 23:01:59,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:01:59,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:01:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:01:59,879 INFO L87 Difference]: Start difference. First operand 484 states and 720 transitions. Second operand 7 states. [2019-10-13 23:01:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:59,971 INFO L93 Difference]: Finished difference Result 939 states and 1418 transitions. [2019-10-13 23:01:59,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:01:59,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-10-13 23:01:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:59,977 INFO L225 Difference]: With dead ends: 939 [2019-10-13 23:01:59,977 INFO L226 Difference]: Without dead ends: 492 [2019-10-13 23:01:59,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:01:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-10-13 23:02:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 485. [2019-10-13 23:02:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2019-10-13 23:02:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 721 transitions. [2019-10-13 23:02:00,010 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 721 transitions. Word has length 128 [2019-10-13 23:02:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:00,010 INFO L462 AbstractCegarLoop]: Abstraction has 485 states and 721 transitions. [2019-10-13 23:02:00,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 721 transitions. [2019-10-13 23:02:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 23:02:00,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:00,015 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:00,015 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:00,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1706005297, now seen corresponding path program 1 times [2019-10-13 23:02:00,016 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:00,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703564576] [2019-10-13 23:02:00,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:00,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:00,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:00,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703564576] [2019-10-13 23:02:00,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:00,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 23:02:00,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005111435] [2019-10-13 23:02:00,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:00,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:00,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:00,266 INFO L87 Difference]: Start difference. First operand 485 states and 721 transitions. Second operand 7 states. [2019-10-13 23:02:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:00,368 INFO L93 Difference]: Finished difference Result 941 states and 1420 transitions. [2019-10-13 23:02:00,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:02:00,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-10-13 23:02:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:00,375 INFO L225 Difference]: With dead ends: 941 [2019-10-13 23:02:00,376 INFO L226 Difference]: Without dead ends: 493 [2019-10-13 23:02:00,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:02:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-10-13 23:02:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 486. [2019-10-13 23:02:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2019-10-13 23:02:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 722 transitions. [2019-10-13 23:02:00,419 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 722 transitions. Word has length 128 [2019-10-13 23:02:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:00,422 INFO L462 AbstractCegarLoop]: Abstraction has 486 states and 722 transitions. [2019-10-13 23:02:00,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:02:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 722 transitions. [2019-10-13 23:02:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 23:02:00,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:00,428 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:00,428 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1523899197, now seen corresponding path program 1 times [2019-10-13 23:02:00,429 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:00,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566988975] [2019-10-13 23:02:00,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:00,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:00,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:00,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566988975] [2019-10-13 23:02:00,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:00,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:02:00,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193921452] [2019-10-13 23:02:00,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:00,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:02:00,765 INFO L87 Difference]: Start difference. First operand 486 states and 722 transitions. Second operand 4 states. [2019-10-13 23:02:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:01,894 INFO L93 Difference]: Finished difference Result 1743 states and 2642 transitions. [2019-10-13 23:02:01,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:01,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-10-13 23:02:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:01,906 INFO L225 Difference]: With dead ends: 1743 [2019-10-13 23:02:01,906 INFO L226 Difference]: Without dead ends: 1294 [2019-10-13 23:02:01,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:02:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2019-10-13 23:02:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1284. [2019-10-13 23:02:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1284 states. [2019-10-13 23:02:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1921 transitions. [2019-10-13 23:02:01,986 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1921 transitions. Word has length 131 [2019-10-13 23:02:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:01,986 INFO L462 AbstractCegarLoop]: Abstraction has 1284 states and 1921 transitions. [2019-10-13 23:02:01,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1921 transitions. [2019-10-13 23:02:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 23:02:01,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:01,991 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:01,991 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash -71400793, now seen corresponding path program 1 times [2019-10-13 23:02:01,992 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:01,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656761422] [2019-10-13 23:02:01,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:01,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:01,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:02,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656761422] [2019-10-13 23:02:02,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:02,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:02,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398253975] [2019-10-13 23:02:02,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:02,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:02,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:02,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:02,297 INFO L87 Difference]: Start difference. First operand 1284 states and 1921 transitions. Second operand 9 states. [2019-10-13 23:02:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:02,580 INFO L93 Difference]: Finished difference Result 2346 states and 3582 transitions. [2019-10-13 23:02:02,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 23:02:02,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 138 [2019-10-13 23:02:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:02,593 INFO L225 Difference]: With dead ends: 2346 [2019-10-13 23:02:02,594 INFO L226 Difference]: Without dead ends: 1400 [2019-10-13 23:02:02,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:02:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2019-10-13 23:02:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2019-10-13 23:02:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2019-10-13 23:02:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2096 transitions. [2019-10-13 23:02:02,674 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2096 transitions. Word has length 138 [2019-10-13 23:02:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:02,675 INFO L462 AbstractCegarLoop]: Abstraction has 1400 states and 2096 transitions. [2019-10-13 23:02:02,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2096 transitions. [2019-10-13 23:02:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 23:02:02,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:02,680 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:02,680 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash 830960031, now seen corresponding path program 1 times [2019-10-13 23:02:02,681 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:02,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75070898] [2019-10-13 23:02:02,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:02,681 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:02,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:02,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75070898] [2019-10-13 23:02:02,900 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:02,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:02:02,900 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928026909] [2019-10-13 23:02:02,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:02,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:02,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:02:02,902 INFO L87 Difference]: Start difference. First operand 1400 states and 2096 transitions. Second operand 4 states. [2019-10-13 23:02:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:04,185 INFO L93 Difference]: Finished difference Result 5370 states and 8388 transitions. [2019-10-13 23:02:04,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:02:04,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-13 23:02:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:04,220 INFO L225 Difference]: With dead ends: 5370 [2019-10-13 23:02:04,220 INFO L226 Difference]: Without dead ends: 4007 [2019-10-13 23:02:04,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:02:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2019-10-13 23:02:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3942. [2019-10-13 23:02:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2019-10-13 23:02:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 6063 transitions. [2019-10-13 23:02:04,455 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 6063 transitions. Word has length 139 [2019-10-13 23:02:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:04,455 INFO L462 AbstractCegarLoop]: Abstraction has 3942 states and 6063 transitions. [2019-10-13 23:02:04,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 6063 transitions. [2019-10-13 23:02:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 23:02:04,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:04,460 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:04,460 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1523142433, now seen corresponding path program 1 times [2019-10-13 23:02:04,461 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:04,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465726164] [2019-10-13 23:02:04,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:04,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:04,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:04,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465726164] [2019-10-13 23:02:04,686 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:02:04,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:02:04,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279569164] [2019-10-13 23:02:04,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:02:04,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:02:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:04,688 INFO L87 Difference]: Start difference. First operand 3942 states and 6063 transitions. Second operand 9 states. [2019-10-13 23:02:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:05,799 INFO L93 Difference]: Finished difference Result 8306 states and 12901 transitions. [2019-10-13 23:02:05,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:02:05,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 141 [2019-10-13 23:02:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:05,843 INFO L225 Difference]: With dead ends: 8306 [2019-10-13 23:02:05,843 INFO L226 Difference]: Without dead ends: 5287 [2019-10-13 23:02:05,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:02:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5287 states. [2019-10-13 23:02:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5287 to 5214. [2019-10-13 23:02:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5214 states. [2019-10-13 23:02:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 8038 transitions. [2019-10-13 23:02:06,119 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 8038 transitions. Word has length 141 [2019-10-13 23:02:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:06,120 INFO L462 AbstractCegarLoop]: Abstraction has 5214 states and 8038 transitions. [2019-10-13 23:02:06,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:02:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 8038 transitions. [2019-10-13 23:02:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 23:02:06,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:06,126 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:02:06,126 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:06,126 INFO L82 PathProgramCache]: Analyzing trace with hash 339496913, now seen corresponding path program 1 times [2019-10-13 23:02:06,127 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:06,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124686821] [2019-10-13 23:02:06,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:06,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:02:06,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124686821] [2019-10-13 23:02:06,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122972352] [2019-10-13 23:02:06,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:07,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:07,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:02:07,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:02:07,370 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:07,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-13 23:02:07,371 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467527689] [2019-10-13 23:02:07,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:02:07,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:02:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:02:07,372 INFO L87 Difference]: Start difference. First operand 5214 states and 8038 transitions. Second operand 4 states. [2019-10-13 23:02:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:07,685 INFO L93 Difference]: Finished difference Result 10445 states and 16304 transitions. [2019-10-13 23:02:07,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:07,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-13 23:02:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:07,736 INFO L225 Difference]: With dead ends: 10445 [2019-10-13 23:02:07,737 INFO L226 Difference]: Without dead ends: 5268 [2019-10-13 23:02:07,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:02:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2019-10-13 23:02:08,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2019-10-13 23:02:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5268 states. [2019-10-13 23:02:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 8092 transitions. [2019-10-13 23:02:08,066 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 8092 transitions. Word has length 144 [2019-10-13 23:02:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:08,066 INFO L462 AbstractCegarLoop]: Abstraction has 5268 states and 8092 transitions. [2019-10-13 23:02:08,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:02:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 8092 transitions. [2019-10-13 23:02:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 23:02:08,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:08,072 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:08,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:08,281 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:08,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1528274040, now seen corresponding path program 1 times [2019-10-13 23:02:08,282 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:08,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295928401] [2019-10-13 23:02:08,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:08,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:08,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:08,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295928401] [2019-10-13 23:02:08,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324840177] [2019-10-13 23:02:08,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:10,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:10,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:02:10,099 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 23:02:10,231 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:10,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 8 [2019-10-13 23:02:10,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277696997] [2019-10-13 23:02:10,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:10,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:10,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:10,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:10,233 INFO L87 Difference]: Start difference. First operand 5268 states and 8092 transitions. Second operand 5 states. [2019-10-13 23:02:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:10,565 INFO L93 Difference]: Finished difference Result 10526 states and 16326 transitions. [2019-10-13 23:02:10,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:10,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-10-13 23:02:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:10,634 INFO L225 Difference]: With dead ends: 10526 [2019-10-13 23:02:10,635 INFO L226 Difference]: Without dead ends: 5259 [2019-10-13 23:02:10,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:02:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2019-10-13 23:02:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5259. [2019-10-13 23:02:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5259 states. [2019-10-13 23:02:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5259 states to 5259 states and 8056 transitions. [2019-10-13 23:02:11,078 INFO L78 Accepts]: Start accepts. Automaton has 5259 states and 8056 transitions. Word has length 146 [2019-10-13 23:02:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:11,082 INFO L462 AbstractCegarLoop]: Abstraction has 5259 states and 8056 transitions. [2019-10-13 23:02:11,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5259 states and 8056 transitions. [2019-10-13 23:02:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:02:11,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:11,091 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:11,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:11,311 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:11,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:11,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1929380214, now seen corresponding path program 1 times [2019-10-13 23:02:11,311 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:11,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486604480] [2019-10-13 23:02:11,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:11,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:11,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 23:02:11,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486604480] [2019-10-13 23:02:11,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220968395] [2019-10-13 23:02:11,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:12,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:02:12,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:02:12,387 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:02:12,690 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:12,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2019-10-13 23:02:12,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415639987] [2019-10-13 23:02:12,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:12,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:02:12,692 INFO L87 Difference]: Start difference. First operand 5259 states and 8056 transitions. Second operand 5 states. [2019-10-13 23:02:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:14,504 INFO L93 Difference]: Finished difference Result 13510 states and 21562 transitions. [2019-10-13 23:02:14,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:02:14,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-13 23:02:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:14,571 INFO L225 Difference]: With dead ends: 13510 [2019-10-13 23:02:14,571 INFO L226 Difference]: Without dead ends: 8288 [2019-10-13 23:02:14,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:02:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2019-10-13 23:02:14,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 8233. [2019-10-13 23:02:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8233 states. [2019-10-13 23:02:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 12637 transitions. [2019-10-13 23:02:15,029 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 12637 transitions. Word has length 148 [2019-10-13 23:02:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:15,029 INFO L462 AbstractCegarLoop]: Abstraction has 8233 states and 12637 transitions. [2019-10-13 23:02:15,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 12637 transitions. [2019-10-13 23:02:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:02:15,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:15,035 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:15,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:15,250 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:15,251 INFO L82 PathProgramCache]: Analyzing trace with hash -708222869, now seen corresponding path program 1 times [2019-10-13 23:02:15,251 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:15,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33055120] [2019-10-13 23:02:15,251 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:15,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:15,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:02:15,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33055120] [2019-10-13 23:02:15,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263816588] [2019-10-13 23:02:15,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:16,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 23:02:16,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:02:16,182 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:02:16,353 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:02:16,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 8 [2019-10-13 23:02:16,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049671225] [2019-10-13 23:02:16,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:02:16,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:02:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:16,358 INFO L87 Difference]: Start difference. First operand 8233 states and 12637 transitions. Second operand 5 states. [2019-10-13 23:02:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:02:16,687 INFO L93 Difference]: Finished difference Result 16545 states and 25799 transitions. [2019-10-13 23:02:16,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:02:16,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-13 23:02:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:02:16,739 INFO L225 Difference]: With dead ends: 16545 [2019-10-13 23:02:16,740 INFO L226 Difference]: Without dead ends: 8349 [2019-10-13 23:02:16,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:02:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2019-10-13 23:02:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 8294. [2019-10-13 23:02:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8294 states. [2019-10-13 23:02:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8294 states to 8294 states and 12715 transitions. [2019-10-13 23:02:17,306 INFO L78 Accepts]: Start accepts. Automaton has 8294 states and 12715 transitions. Word has length 148 [2019-10-13 23:02:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:02:17,306 INFO L462 AbstractCegarLoop]: Abstraction has 8294 states and 12715 transitions. [2019-10-13 23:02:17,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:02:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 8294 states and 12715 transitions. [2019-10-13 23:02:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 23:02:17,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:02:17,311 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 23:02:17,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:17,520 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:02:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:02:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 791459910, now seen corresponding path program 1 times [2019-10-13 23:02:17,520 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:02:17,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452083441] [2019-10-13 23:02:17,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:17,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:02:17,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:02:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:17,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452083441] [2019-10-13 23:02:17,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661240801] [2019-10-13 23:02:17,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:02:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:02:18,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:02:18,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:02:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 23:02:18,471 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:02:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 23:02:18,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:02:18,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2019-10-13 23:02:18,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019996840] [2019-10-13 23:02:18,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:02:18,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:02:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:02:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:02:18,779 INFO L87 Difference]: Start difference. First operand 8294 states and 12715 transitions. Second operand 7 states.