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_spec3_product26.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 14:28:00,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 14:28:00,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 14:28:00,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 14:28:00,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 14:28:00,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 14:28:00,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 14:28:00,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 14:28:00,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 14:28:00,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 14:28:00,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 14:28:00,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 14:28:00,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 14:28:00,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 14:28:00,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 14:28:00,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 14:28:00,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 14:28:00,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 14:28:00,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 14:28:00,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 14:28:00,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 14:28:00,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 14:28:00,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 14:28:00,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 14:28:00,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 14:28:00,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 14:28:00,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 14:28:00,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 14:28:00,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 14:28:00,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 14:28:00,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 14:28:00,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 14:28:00,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 14:28:00,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 14:28:00,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 14:28:00,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 14:28:00,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 14:28:00,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 14:28:00,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 14:28:00,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 14:28:00,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 14:28:00,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 14:28:00,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 14:28:00,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 14:28:00,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 14:28:00,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 14:28:00,613 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 14:28:00,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 14:28:00,613 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 14:28:00,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 14:28:00,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 14:28:00,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 14:28:00,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 14:28:00,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 14:28:00,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 14:28:00,615 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 14:28:00,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 14:28:00,615 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 14:28:00,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 14:28:00,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 14:28:00,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 14:28:00,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 14:28:00,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 14:28:00,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:28:00,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 14:28:00,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 14:28:00,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 14:28:00,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 14:28:00,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 14:28:00,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 14:28:00,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 14:28:00,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 14:28:00,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 14:28:00,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 14:28:00,906 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 14:28:00,906 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 14:28:00,907 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product26.cil.c [2019-10-07 14:28:00,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a172931e/b5b8475a12ed4e98b1d61b5d79739b98/FLAGa2f443ff2 [2019-10-07 14:28:01,650 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 14:28:01,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product26.cil.c [2019-10-07 14:28:01,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a172931e/b5b8475a12ed4e98b1d61b5d79739b98/FLAGa2f443ff2 [2019-10-07 14:28:01,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a172931e/b5b8475a12ed4e98b1d61b5d79739b98 [2019-10-07 14:28:01,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 14:28:01,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 14:28:01,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 14:28:01,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 14:28:01,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 14:28:01,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:28:01" (1/1) ... [2019-10-07 14:28:01,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4771d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:01, skipping insertion in model container [2019-10-07 14:28:01,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:28:01" (1/1) ... [2019-10-07 14:28:01,819 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 14:28:01,884 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 14:28:02,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:28:02,580 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 14:28:02,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 14:28:02,796 INFO L192 MainTranslator]: Completed translation [2019-10-07 14:28:02,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02 WrapperNode [2019-10-07 14:28:02,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 14:28:02,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 14:28:02,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 14:28:02,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 14:28:02,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... [2019-10-07 14:28:02,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 14:28:02,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 14:28:02,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 14:28:02,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 14:28:03,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 14:28:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 14:28:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 14:28:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-07 14:28:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-07 14:28:03,067 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-07 14:28:03,067 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-07 14:28:03,067 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-07 14:28:03,067 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-07 14:28:03,068 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-07 14:28:03,068 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-07 14:28:03,068 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-07 14:28:03,068 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-07 14:28:03,069 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-07 14:28:03,069 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-07 14:28:03,069 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-07 14:28:03,070 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-07 14:28:03,070 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-07 14:28:03,070 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-07 14:28:03,070 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-07 14:28:03,071 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-07 14:28:03,071 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-07 14:28:03,071 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-07 14:28:03,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 14:28:03,072 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-07 14:28:03,072 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-07 14:28:03,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-07 14:28:03,072 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-07 14:28:03,073 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-07 14:28:03,073 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-07 14:28:03,073 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-07 14:28:03,073 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-07 14:28:03,073 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-07 14:28:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-07 14:28:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-07 14:28:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-07 14:28:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-07 14:28:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-07 14:28:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-07 14:28:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-07 14:28:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-07 14:28:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-07 14:28:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-07 14:28:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-07 14:28:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-07 14:28:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-07 14:28:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-07 14:28:03,076 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2019-10-07 14:28:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-07 14:28:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__empty [2019-10-07 14:28:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-07 14:28:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-07 14:28:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-07 14:28:03,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-07 14:28:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-07 14:28:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-07 14:28:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-07 14:28:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-07 14:28:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-07 14:28:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-07 14:28:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-07 14:28:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-07 14:28:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-07 14:28:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-07 14:28:03,080 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-07 14:28:03,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-07 14:28:03,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-07 14:28:03,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-07 14:28:03,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-07 14:28:03,081 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-07 14:28:03,081 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-07 14:28:03,081 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-07 14:28:03,081 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-07 14:28:03,081 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-07 14:28:03,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-10-07 14:28:03,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-10-07 14:28:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 14:28:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 14:28:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-07 14:28:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-07 14:28:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-07 14:28:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-07 14:28:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-07 14:28:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-07 14:28:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-07 14:28:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-07 14:28:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-07 14:28:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-07 14:28:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-07 14:28:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-07 14:28:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-07 14:28:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 14:28:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-07 14:28:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-07 14:28:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-07 14:28:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-07 14:28:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-07 14:28:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-07 14:28:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-07 14:28:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-07 14:28:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-07 14:28:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-07 14:28:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-07 14:28:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-07 14:28:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-07 14:28:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-07 14:28:03,087 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-07 14:28:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-07 14:28:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-07 14:28:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 14:28:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-07 14:28:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-07 14:28:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-07 14:28:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-07 14:28:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-07 14:28:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-07 14:28:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-07 14:28:03,089 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-07 14:28:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-07 14:28:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-07 14:28:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-07 14:28:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-07 14:28:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-07 14:28:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-07 14:28:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-07 14:28:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-07 14:28:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-07 14:28:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-07 14:28:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-07 14:28:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-07 14:28:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-07 14:28:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-07 14:28:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-07 14:28:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-07 14:28:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-07 14:28:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-07 14:28:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-07 14:28:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-07 14:28:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2019-10-07 14:28:03,093 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-10-07 14:28:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-10-07 14:28:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__empty [2019-10-07 14:28:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 14:28:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-07 14:28:03,094 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-07 14:28:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 14:28:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 14:28:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-07 14:28:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 14:28:03,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 14:28:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 14:28:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 14:28:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-07 14:28:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 14:28:03,096 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-07 14:28:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-07 14:28:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 14:28:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-07 14:28:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-07 14:28:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-07 14:28:03,097 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-07 14:28:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-07 14:28:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-07 14:28:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 14:28:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 14:28:03,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 14:28:08,095 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 14:28:08,095 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-07 14:28:08,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:28:08 BoogieIcfgContainer [2019-10-07 14:28:08,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 14:28:08,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 14:28:08,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 14:28:08,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 14:28:08,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:28:01" (1/3) ... [2019-10-07 14:28:08,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd9dad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:28:08, skipping insertion in model container [2019-10-07 14:28:08,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:28:02" (2/3) ... [2019-10-07 14:28:08,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd9dad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:28:08, skipping insertion in model container [2019-10-07 14:28:08,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:28:08" (3/3) ... [2019-10-07 14:28:08,105 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2019-10-07 14:28:08,115 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 14:28:08,124 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 14:28:08,135 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 14:28:08,166 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 14:28:08,166 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 14:28:08,166 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 14:28:08,166 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 14:28:08,166 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 14:28:08,166 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 14:28:08,167 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 14:28:08,167 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 14:28:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2019-10-07 14:28:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 14:28:08,208 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:08,209 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:28:08,211 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash 693571216, now seen corresponding path program 1 times [2019-10-07 14:28:08,226 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:08,226 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:08,227 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:08,227 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:28:08,916 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:08,917 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:08,917 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 14:28:08,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:28:08,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:28:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:28:08,941 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2019-10-07 14:28:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:09,258 INFO L93 Difference]: Finished difference Result 1318 states and 2026 transitions. [2019-10-07 14:28:09,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:28:09,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-10-07 14:28:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:09,286 INFO L225 Difference]: With dead ends: 1318 [2019-10-07 14:28:09,286 INFO L226 Difference]: Without dead ends: 866 [2019-10-07 14:28:09,295 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 14:28:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-07 14:28:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 820. [2019-10-07 14:28:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2019-10-07 14:28:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1256 transitions. [2019-10-07 14:28:09,485 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1256 transitions. Word has length 81 [2019-10-07 14:28:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:09,486 INFO L462 AbstractCegarLoop]: Abstraction has 820 states and 1256 transitions. [2019-10-07 14:28:09,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:28:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1256 transitions. [2019-10-07 14:28:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-07 14:28:09,497 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:09,497 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:28:09,497 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1331172463, now seen corresponding path program 1 times [2019-10-07 14:28:09,498 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:09,500 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:09,500 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:09,501 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:28:09,894 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:09,895 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:09,895 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 14:28:09,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 14:28:09,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 14:28:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 14:28:09,898 INFO L87 Difference]: Start difference. First operand 820 states and 1256 transitions. Second operand 7 states. [2019-10-07 14:28:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:12,814 INFO L93 Difference]: Finished difference Result 2446 states and 3840 transitions. [2019-10-07 14:28:12,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-07 14:28:12,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-10-07 14:28:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:12,831 INFO L225 Difference]: With dead ends: 2446 [2019-10-07 14:28:12,831 INFO L226 Difference]: Without dead ends: 1657 [2019-10-07 14:28:12,837 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:28:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2019-10-07 14:28:12,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1609. [2019-10-07 14:28:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1609 states. [2019-10-07 14:28:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2498 transitions. [2019-10-07 14:28:12,948 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2498 transitions. Word has length 109 [2019-10-07 14:28:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:12,949 INFO L462 AbstractCegarLoop]: Abstraction has 1609 states and 2498 transitions. [2019-10-07 14:28:12,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 14:28:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2498 transitions. [2019-10-07 14:28:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-07 14:28:12,956 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:12,956 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:28:12,957 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash -694421880, now seen corresponding path program 1 times [2019-10-07 14:28:12,957 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:12,957 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:12,958 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:12,958 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:28:13,274 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:13,274 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:13,274 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-07 14:28:13,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 14:28:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 14:28:13,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:28:13,277 INFO L87 Difference]: Start difference. First operand 1609 states and 2498 transitions. Second operand 8 states. [2019-10-07 14:28:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:16,295 INFO L93 Difference]: Finished difference Result 5863 states and 9213 transitions. [2019-10-07 14:28:16,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-07 14:28:16,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 107 [2019-10-07 14:28:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:16,347 INFO L225 Difference]: With dead ends: 5863 [2019-10-07 14:28:16,347 INFO L226 Difference]: Without dead ends: 4285 [2019-10-07 14:28:16,364 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-07 14:28:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2019-10-07 14:28:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4269. [2019-10-07 14:28:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4269 states. [2019-10-07 14:28:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 6557 transitions. [2019-10-07 14:28:16,708 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 6557 transitions. Word has length 107 [2019-10-07 14:28:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:16,708 INFO L462 AbstractCegarLoop]: Abstraction has 4269 states and 6557 transitions. [2019-10-07 14:28:16,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 14:28:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 6557 transitions. [2019-10-07 14:28:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-07 14:28:16,714 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:16,715 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:16,715 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1786234194, now seen corresponding path program 1 times [2019-10-07 14:28:16,723 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:16,724 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:16,724 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:16,724 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:28:16,985 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:16,986 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:28:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:28:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:17,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 3220 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 14:28:17,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:28:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:28:17,665 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:28:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:28:17,825 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:28:17,825 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-07 14:28:17,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:28:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:28:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:28:17,828 INFO L87 Difference]: Start difference. First operand 4269 states and 6557 transitions. Second operand 3 states. [2019-10-07 14:28:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:18,389 INFO L93 Difference]: Finished difference Result 12077 states and 19230 transitions. [2019-10-07 14:28:18,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:28:18,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-10-07 14:28:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:18,478 INFO L225 Difference]: With dead ends: 12077 [2019-10-07 14:28:18,479 INFO L226 Difference]: Without dead ends: 7839 [2019-10-07 14:28:18,516 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:28:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7839 states. [2019-10-07 14:28:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7839 to 7529. [2019-10-07 14:28:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2019-10-07 14:28:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 11714 transitions. [2019-10-07 14:28:19,044 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 11714 transitions. Word has length 111 [2019-10-07 14:28:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:19,047 INFO L462 AbstractCegarLoop]: Abstraction has 7529 states and 11714 transitions. [2019-10-07 14:28:19,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:28:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 11714 transitions. [2019-10-07 14:28:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-07 14:28:19,051 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:19,051 INFO L385 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:19,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:28:19,261 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2130624422, now seen corresponding path program 1 times [2019-10-07 14:28:19,262 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:19,263 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:19,263 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:19,263 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 14:28:19,573 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:19,573 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:28:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:28:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:20,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 3221 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 14:28:20,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:28:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 14:28:20,307 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:28:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 14:28:20,451 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 14:28:20,452 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-07 14:28:20,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:28:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:28:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:28:20,454 INFO L87 Difference]: Start difference. First operand 7529 states and 11714 transitions. Second operand 3 states. [2019-10-07 14:28:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:20,875 INFO L93 Difference]: Finished difference Result 16635 states and 26341 transitions. [2019-10-07 14:28:20,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:28:20,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-07 14:28:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:20,999 INFO L225 Difference]: With dead ends: 16635 [2019-10-07 14:28:21,000 INFO L226 Difference]: Without dead ends: 9137 [2019-10-07 14:28:21,073 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-07 14:28:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2019-10-07 14:28:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 8923. [2019-10-07 14:28:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8923 states. [2019-10-07 14:28:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8923 states to 8923 states and 13865 transitions. [2019-10-07 14:28:22,586 INFO L78 Accepts]: Start accepts. Automaton has 8923 states and 13865 transitions. Word has length 112 [2019-10-07 14:28:22,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:22,590 INFO L462 AbstractCegarLoop]: Abstraction has 8923 states and 13865 transitions. [2019-10-07 14:28:22,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:28:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 8923 states and 13865 transitions. [2019-10-07 14:28:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-07 14:28:22,599 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:22,599 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:22,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:28:22,810 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:22,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash 697797265, now seen corresponding path program 1 times [2019-10-07 14:28:22,811 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:22,814 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:22,814 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:22,814 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 14:28:23,087 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:23,087 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:23,088 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-07 14:28:23,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 14:28:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 14:28:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:28:23,090 INFO L87 Difference]: Start difference. First operand 8923 states and 13865 transitions. Second operand 10 states. [2019-10-07 14:28:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:24,811 INFO L93 Difference]: Finished difference Result 19637 states and 30850 transitions. [2019-10-07 14:28:24,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-07 14:28:24,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 118 [2019-10-07 14:28:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:24,895 INFO L225 Difference]: With dead ends: 19637 [2019-10-07 14:28:24,895 INFO L226 Difference]: Without dead ends: 10745 [2019-10-07 14:28:24,945 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:28:24,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2019-10-07 14:28:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10703. [2019-10-07 14:28:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10703 states. [2019-10-07 14:28:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10703 states to 10703 states and 16620 transitions. [2019-10-07 14:28:25,576 INFO L78 Accepts]: Start accepts. Automaton has 10703 states and 16620 transitions. Word has length 118 [2019-10-07 14:28:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:25,577 INFO L462 AbstractCegarLoop]: Abstraction has 10703 states and 16620 transitions. [2019-10-07 14:28:25,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 14:28:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10703 states and 16620 transitions. [2019-10-07 14:28:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-07 14:28:25,581 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:25,581 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 14:28:25,581 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1827642056, now seen corresponding path program 1 times [2019-10-07 14:28:25,582 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:25,582 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:25,582 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:25,582 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-07 14:28:25,803 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:25,803 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:25,804 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-07 14:28:25,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 14:28:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 14:28:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:28:25,806 INFO L87 Difference]: Start difference. First operand 10703 states and 16620 transitions. Second operand 10 states. [2019-10-07 14:28:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:29,556 INFO L93 Difference]: Finished difference Result 34924 states and 57097 transitions. [2019-10-07 14:28:29,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-07 14:28:29,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 119 [2019-10-07 14:28:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:29,743 INFO L225 Difference]: With dead ends: 34924 [2019-10-07 14:28:29,743 INFO L226 Difference]: Without dead ends: 24252 [2019-10-07 14:28:29,806 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2019-10-07 14:28:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24252 states. [2019-10-07 14:28:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24252 to 23731. [2019-10-07 14:28:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23731 states. [2019-10-07 14:28:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23731 states to 23731 states and 38066 transitions. [2019-10-07 14:28:31,056 INFO L78 Accepts]: Start accepts. Automaton has 23731 states and 38066 transitions. Word has length 119 [2019-10-07 14:28:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:31,060 INFO L462 AbstractCegarLoop]: Abstraction has 23731 states and 38066 transitions. [2019-10-07 14:28:31,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 14:28:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 23731 states and 38066 transitions. [2019-10-07 14:28:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-07 14:28:31,064 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:31,064 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:31,064 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1763969457, now seen corresponding path program 1 times [2019-10-07 14:28:31,065 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:31,065 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:31,065 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:31,065 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-07 14:28:31,267 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:31,267 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:31,267 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-07 14:28:31,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-07 14:28:31,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-07 14:28:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:28:31,269 INFO L87 Difference]: Start difference. First operand 23731 states and 38066 transitions. Second operand 8 states. [2019-10-07 14:28:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:32,935 INFO L93 Difference]: Finished difference Result 46780 states and 77193 transitions. [2019-10-07 14:28:32,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 14:28:32,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-10-07 14:28:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:33,112 INFO L225 Difference]: With dead ends: 46780 [2019-10-07 14:28:33,112 INFO L226 Difference]: Without dead ends: 25895 [2019-10-07 14:28:33,226 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-07 14:28:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25895 states. [2019-10-07 14:28:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25895 to 24041. [2019-10-07 14:28:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24041 states. [2019-10-07 14:28:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24041 states to 24041 states and 38376 transitions. [2019-10-07 14:28:34,356 INFO L78 Accepts]: Start accepts. Automaton has 24041 states and 38376 transitions. Word has length 125 [2019-10-07 14:28:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:34,357 INFO L462 AbstractCegarLoop]: Abstraction has 24041 states and 38376 transitions. [2019-10-07 14:28:34,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-07 14:28:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24041 states and 38376 transitions. [2019-10-07 14:28:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-07 14:28:34,361 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:34,361 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:34,361 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1301120125, now seen corresponding path program 1 times [2019-10-07 14:28:34,362 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:34,362 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:34,362 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:34,363 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-07 14:28:34,594 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:34,594 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:34,594 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-10-07 14:28:34,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-07 14:28:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-07 14:28:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:28:34,596 INFO L87 Difference]: Start difference. First operand 24041 states and 38376 transitions. Second operand 11 states. [2019-10-07 14:28:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:28:41,673 INFO L93 Difference]: Finished difference Result 51488 states and 86863 transitions. [2019-10-07 14:28:41,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-07 14:28:41,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 129 [2019-10-07 14:28:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:28:41,918 INFO L225 Difference]: With dead ends: 51488 [2019-10-07 14:28:41,918 INFO L226 Difference]: Without dead ends: 30631 [2019-10-07 14:28:42,038 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2019-10-07 14:28:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30631 states. [2019-10-07 14:28:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30631 to 28709. [2019-10-07 14:28:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28709 states. [2019-10-07 14:28:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28709 states to 28709 states and 46213 transitions. [2019-10-07 14:28:44,878 INFO L78 Accepts]: Start accepts. Automaton has 28709 states and 46213 transitions. Word has length 129 [2019-10-07 14:28:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:28:44,882 INFO L462 AbstractCegarLoop]: Abstraction has 28709 states and 46213 transitions. [2019-10-07 14:28:44,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-07 14:28:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 28709 states and 46213 transitions. [2019-10-07 14:28:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-07 14:28:44,887 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:28:44,887 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:28:44,887 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:28:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:28:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1055176155, now seen corresponding path program 1 times [2019-10-07 14:28:44,888 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:28:44,888 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:44,888 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:44,888 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:28:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:28:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:28:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 14:28:45,199 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:28:45,199 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:28:45,199 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2019-10-07 14:28:45,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-07 14:28:45,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-07 14:28:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-10-07 14:28:45,202 INFO L87 Difference]: Start difference. First operand 28709 states and 46213 transitions. Second operand 16 states. [2019-10-07 14:29:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:29:00,232 INFO L93 Difference]: Finished difference Result 120559 states and 218993 transitions. [2019-10-07 14:29:00,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-07 14:29:00,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 132 [2019-10-07 14:29:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:29:00,976 INFO L225 Difference]: With dead ends: 120559 [2019-10-07 14:29:00,976 INFO L226 Difference]: Without dead ends: 95930 [2019-10-07 14:29:01,150 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2019-10-07 14:29:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95930 states. [2019-10-07 14:29:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95930 to 90023. [2019-10-07 14:29:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90023 states. [2019-10-07 14:29:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90023 states to 90023 states and 154873 transitions. [2019-10-07 14:29:07,247 INFO L78 Accepts]: Start accepts. Automaton has 90023 states and 154873 transitions. Word has length 132 [2019-10-07 14:29:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:29:07,248 INFO L462 AbstractCegarLoop]: Abstraction has 90023 states and 154873 transitions. [2019-10-07 14:29:07,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-07 14:29:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 90023 states and 154873 transitions. [2019-10-07 14:29:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-07 14:29:07,255 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:29:07,256 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:29:07,256 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:29:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:29:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1196051654, now seen corresponding path program 1 times [2019-10-07 14:29:07,258 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:29:07,258 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:07,258 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:07,258 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:29:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:29:07,432 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:07,432 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:29:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:08,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 3362 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 14:29:08,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:29:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 14:29:08,135 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:29:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 14:29:08,344 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:29:08,344 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 11 [2019-10-07 14:29:08,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:29:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:29:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:29:08,345 INFO L87 Difference]: Start difference. First operand 90023 states and 154873 transitions. Second operand 5 states. [2019-10-07 14:29:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:29:13,783 INFO L93 Difference]: Finished difference Result 179156 states and 323729 transitions. [2019-10-07 14:29:13,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:29:13,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-10-07 14:29:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:29:14,212 INFO L225 Difference]: With dead ends: 179156 [2019-10-07 14:29:14,212 INFO L226 Difference]: Without dead ends: 92077 [2019-10-07 14:29:14,591 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:29:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92077 states. [2019-10-07 14:29:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92077 to 91171. [2019-10-07 14:29:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91171 states. [2019-10-07 14:29:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91171 states to 91171 states and 157600 transitions. [2019-10-07 14:29:23,260 INFO L78 Accepts]: Start accepts. Automaton has 91171 states and 157600 transitions. Word has length 156 [2019-10-07 14:29:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:29:23,261 INFO L462 AbstractCegarLoop]: Abstraction has 91171 states and 157600 transitions. [2019-10-07 14:29:23,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:29:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 91171 states and 157600 transitions. [2019-10-07 14:29:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-07 14:29:23,270 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:29:23,270 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:29:23,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:23,471 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:29:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:29:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash 667876221, now seen corresponding path program 1 times [2019-10-07 14:29:23,472 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:29:23,472 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:23,472 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:23,472 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:29:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 14:29:23,652 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:23,652 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:29:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:24,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 3368 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:29:24,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:29:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-07 14:29:24,280 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:29:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 14:29:24,453 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:29:24,453 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-07 14:29:24,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:29:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:29:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:29:24,455 INFO L87 Difference]: Start difference. First operand 91171 states and 157600 transitions. Second operand 4 states. [2019-10-07 14:29:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:29:30,748 INFO L93 Difference]: Finished difference Result 192813 states and 345349 transitions. [2019-10-07 14:29:30,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 14:29:30,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-10-07 14:29:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:29:31,227 INFO L225 Difference]: With dead ends: 192813 [2019-10-07 14:29:31,227 INFO L226 Difference]: Without dead ends: 84954 [2019-10-07 14:29:31,661 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 332 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:29:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84954 states. [2019-10-07 14:29:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84954 to 84930. [2019-10-07 14:29:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84930 states. [2019-10-07 14:29:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84930 states to 84930 states and 142171 transitions. [2019-10-07 14:29:35,973 INFO L78 Accepts]: Start accepts. Automaton has 84930 states and 142171 transitions. Word has length 167 [2019-10-07 14:29:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:29:35,974 INFO L462 AbstractCegarLoop]: Abstraction has 84930 states and 142171 transitions. [2019-10-07 14:29:35,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:29:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 84930 states and 142171 transitions. [2019-10-07 14:29:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-07 14:29:35,983 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:29:35,984 INFO L385 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:29:36,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:36,194 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:29:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:29:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash -481537971, now seen corresponding path program 1 times [2019-10-07 14:29:36,195 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:29:36,195 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:36,195 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:36,195 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:29:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 14:29:36,371 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:36,371 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:29:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:36,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 3372 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:29:36,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:29:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-07 14:29:36,997 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:29:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 14:29:37,215 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:29:37,215 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-10-07 14:29:37,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 14:29:37,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 14:29:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 14:29:37,217 INFO L87 Difference]: Start difference. First operand 84930 states and 142171 transitions. Second operand 4 states. [2019-10-07 14:29:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:29:43,526 INFO L93 Difference]: Finished difference Result 183455 states and 320579 transitions. [2019-10-07 14:29:43,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 14:29:43,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-07 14:29:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:29:43,982 INFO L225 Difference]: With dead ends: 183455 [2019-10-07 14:29:43,982 INFO L226 Difference]: Without dead ends: 84930 [2019-10-07 14:29:44,387 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:29:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84930 states. [2019-10-07 14:29:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84930 to 84930. [2019-10-07 14:29:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84930 states. [2019-10-07 14:29:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84930 states to 84930 states and 139764 transitions. [2019-10-07 14:29:48,382 INFO L78 Accepts]: Start accepts. Automaton has 84930 states and 139764 transitions. Word has length 171 [2019-10-07 14:29:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:29:48,382 INFO L462 AbstractCegarLoop]: Abstraction has 84930 states and 139764 transitions. [2019-10-07 14:29:48,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 14:29:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 84930 states and 139764 transitions. [2019-10-07 14:29:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-07 14:29:48,395 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:29:48,396 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-07 14:29:48,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:29:48,604 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:29:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:29:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash -573097043, now seen corresponding path program 1 times [2019-10-07 14:29:48,605 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:29:48,605 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:48,605 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:48,605 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:29:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:29:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-07 14:29:48,874 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:29:48,874 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:29:48,874 INFO L95 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 [2019-10-07 14:29:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:29:49,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 3818 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-07 14:29:49,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:29:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 14:29:49,696 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:29:50,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:29:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-07 14:29:50,171 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:29:50,171 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 9] total 24 [2019-10-07 14:29:50,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 14:29:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 14:29:50,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2019-10-07 14:29:50,173 INFO L87 Difference]: Start difference. First operand 84930 states and 139764 transitions. Second operand 9 states. [2019-10-07 14:30:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:30:04,998 INFO L93 Difference]: Finished difference Result 229631 states and 412316 transitions. [2019-10-07 14:30:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-07 14:30:04,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 187 [2019-10-07 14:30:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:30:05,776 INFO L225 Difference]: With dead ends: 229631 [2019-10-07 14:30:05,776 INFO L226 Difference]: Without dead ends: 144732 [2019-10-07 14:30:06,088 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 364 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2019-10-07 14:30:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144732 states. [2019-10-07 14:30:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144732 to 136010. [2019-10-07 14:30:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136010 states. [2019-10-07 14:30:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136010 states to 136010 states and 228060 transitions. [2019-10-07 14:30:19,406 INFO L78 Accepts]: Start accepts. Automaton has 136010 states and 228060 transitions. Word has length 187 [2019-10-07 14:30:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:30:19,406 INFO L462 AbstractCegarLoop]: Abstraction has 136010 states and 228060 transitions. [2019-10-07 14:30:19,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 14:30:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 136010 states and 228060 transitions. [2019-10-07 14:30:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-07 14:30:19,417 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:30:19,418 INFO L385 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:30:19,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:30:19,628 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:30:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:30:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash -529330666, now seen corresponding path program 1 times [2019-10-07 14:30:19,629 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:30:19,629 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:30:19,629 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:30:19,630 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:30:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:30:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:30:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-07 14:30:19,890 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:30:19,890 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:30:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:30:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:30:20,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 4408 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 14:30:20,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:30:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-07 14:30:20,746 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:30:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-07 14:30:21,079 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:30:21,080 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 4] total 11 [2019-10-07 14:30:21,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 14:30:21,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 14:30:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:30:21,081 INFO L87 Difference]: Start difference. First operand 136010 states and 228060 transitions. Second operand 3 states. [2019-10-07 14:30:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:30:34,775 INFO L93 Difference]: Finished difference Result 310653 states and 558875 transitions. [2019-10-07 14:30:34,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 14:30:34,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2019-10-07 14:30:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:30:36,506 INFO L225 Difference]: With dead ends: 310653 [2019-10-07 14:30:36,506 INFO L226 Difference]: Without dead ends: 174674 [2019-10-07 14:30:37,214 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-07 14:30:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174674 states. [2019-10-07 14:30:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174674 to 170976. [2019-10-07 14:30:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170976 states. [2019-10-07 14:30:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170976 states to 170976 states and 287254 transitions. [2019-10-07 14:30:51,706 INFO L78 Accepts]: Start accepts. Automaton has 170976 states and 287254 transitions. Word has length 317 [2019-10-07 14:30:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:30:51,706 INFO L462 AbstractCegarLoop]: Abstraction has 170976 states and 287254 transitions. [2019-10-07 14:30:51,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 14:30:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 170976 states and 287254 transitions. [2019-10-07 14:30:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-07 14:30:51,719 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:30:51,719 INFO L385 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:30:51,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:30:51,930 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:30:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:30:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1038206451, now seen corresponding path program 1 times [2019-10-07 14:30:51,930 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:30:51,930 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:30:51,930 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:30:51,931 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:30:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:30:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:30:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-07 14:30:52,113 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:30:52,113 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 14:30:52,113 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 14:30:52,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 14:30:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 14:30:52,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:30:52,114 INFO L87 Difference]: Start difference. First operand 170976 states and 287254 transitions. Second operand 5 states. [2019-10-07 14:31:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:31:08,430 INFO L93 Difference]: Finished difference Result 290011 states and 501397 transitions. [2019-10-07 14:31:08,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 14:31:08,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2019-10-07 14:31:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:31:09,204 INFO L225 Difference]: With dead ends: 290011 [2019-10-07 14:31:09,205 INFO L226 Difference]: Without dead ends: 174714 [2019-10-07 14:31:09,746 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 14:31:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174714 states. [2019-10-07 14:31:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174714 to 173558. [2019-10-07 14:31:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173558 states. [2019-10-07 14:31:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173558 states to 173558 states and 290070 transitions. [2019-10-07 14:31:18,559 INFO L78 Accepts]: Start accepts. Automaton has 173558 states and 290070 transitions. Word has length 191 [2019-10-07 14:31:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:31:18,560 INFO L462 AbstractCegarLoop]: Abstraction has 173558 states and 290070 transitions. [2019-10-07 14:31:18,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 14:31:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 173558 states and 290070 transitions. [2019-10-07 14:31:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-07 14:31:18,568 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:31:18,568 INFO L385 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:31:18,568 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:31:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:31:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash -160374959, now seen corresponding path program 1 times [2019-10-07 14:31:18,569 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:31:18,569 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:31:18,569 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:31:18,569 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:31:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:31:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:31:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-07 14:31:18,829 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:31:18,829 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:31:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:31:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:31:19,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 3427 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-07 14:31:19,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:31:19,711 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:31:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-07 14:31:19,787 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:31:20,218 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:31:20,628 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:31:20,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:20,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:20,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:20,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:20,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:31:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-07 14:31:20,747 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:31:20,747 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 18 [2019-10-07 14:31:20,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:31:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:31:20,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-07 14:31:20,749 INFO L87 Difference]: Start difference. First operand 173558 states and 290070 transitions. Second operand 6 states. [2019-10-07 14:31:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:31:41,044 INFO L93 Difference]: Finished difference Result 496023 states and 900917 transitions. [2019-10-07 14:31:41,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:31:41,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2019-10-07 14:31:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:31:42,675 INFO L225 Difference]: With dead ends: 496023 [2019-10-07 14:31:42,675 INFO L226 Difference]: Without dead ends: 322458 [2019-10-07 14:31:44,780 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-07 14:31:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322458 states. [2019-10-07 14:32:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322458 to 317265. [2019-10-07 14:32:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317265 states. [2019-10-07 14:32:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317265 states to 317265 states and 560466 transitions. [2019-10-07 14:32:18,745 INFO L78 Accepts]: Start accepts. Automaton has 317265 states and 560466 transitions. Word has length 194 [2019-10-07 14:32:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 14:32:18,746 INFO L462 AbstractCegarLoop]: Abstraction has 317265 states and 560466 transitions. [2019-10-07 14:32:18,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 14:32:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 317265 states and 560466 transitions. [2019-10-07 14:32:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-07 14:32:18,754 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 14:32:18,755 INFO L385 BasicCegarLoop]: trace histogram [6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 14:32:18,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:32:18,956 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 14:32:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 14:32:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1769881362, now seen corresponding path program 1 times [2019-10-07 14:32:18,957 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 14:32:18,957 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:32:18,958 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:32:18,958 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 14:32:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 14:32:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:32:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-07 14:32:19,205 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 14:32:19,206 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 14:32:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 14:32:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 14:32:20,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 3443 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-07 14:32:20,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 14:32:21,094 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-10-07 14:32:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-07 14:32:21,147 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 14:32:21,571 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:32:21,972 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 13 [2019-10-07 14:32:22,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:22,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:22,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:22,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:22,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 14:32:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-07 14:32:22,093 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 14:32:22,093 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 18 [2019-10-07 14:32:22,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 14:32:22,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 14:32:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-07 14:32:22,095 INFO L87 Difference]: Start difference. First operand 317265 states and 560466 transitions. Second operand 6 states. [2019-10-07 14:33:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 14:33:18,360 INFO L93 Difference]: Finished difference Result 916143 states and 1814509 transitions. [2019-10-07 14:33:18,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 14:33:18,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 200 [2019-10-07 14:33:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 14:33:33,155 INFO L225 Difference]: With dead ends: 916143 [2019-10-07 14:33:33,155 INFO L226 Difference]: Without dead ends: 598871 [2019-10-07 14:33:35,858 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-07 14:33:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598871 states. [2019-10-07 14:34:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598871 to 592638. [2019-10-07 14:34:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592638 states.