/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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_spec14_product19.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:07:30,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:07:30,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:07:30,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:07:30,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:07:30,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:07:30,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:07:30,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:07:30,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:07:30,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:07:30,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:07:30,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:07:30,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:07:30,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:07:30,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:07:30,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:07:30,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:07:30,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:07:30,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:07:30,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:07:30,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:07:30,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:07:30,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:07:30,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:07:30,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:07:30,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:07:30,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:07:30,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:07:30,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:07:30,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:07:30,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:07:30,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:07:30,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:07:30,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:07:30,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:07:30,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:07:30,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:07:30,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:07:30,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:07:30,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:07:30,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:07:30,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:07:30,987 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:07:30,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:07:30,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:07:30,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:07:30,989 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:07:30,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:07:30,990 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:07:30,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:07:30,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:07:30,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:07:30,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:07:30,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:07:30,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:07:30,991 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:07:30,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:07:30,991 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:07:30,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:07:30,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:07:30,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:07:30,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:07:30,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:07:30,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:07:30,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:07:30,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:07:30,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:07:30,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:07:30,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:07:30,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:07:30,994 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 [2019-11-07 04:07:31,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:07:31,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:07:31,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:07:31,290 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:07:31,290 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:07:31,291 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-11-07 04:07:31,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f35bda9c/64f9bf6149444f7180cfecf6146da2d5/FLAGe4035719e [2019-11-07 04:07:32,090 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:07:32,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product19.cil.c [2019-11-07 04:07:32,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f35bda9c/64f9bf6149444f7180cfecf6146da2d5/FLAGe4035719e [2019-11-07 04:07:32,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f35bda9c/64f9bf6149444f7180cfecf6146da2d5 [2019-11-07 04:07:32,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:07:32,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:07:32,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:32,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:07:32,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:07:32,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:32" (1/1) ... [2019-11-07 04:07:32,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6532be60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:32, skipping insertion in model container [2019-11-07 04:07:32,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:07:32" (1/1) ... [2019-11-07 04:07:32,255 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:07:32,342 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:07:32,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:33,008 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:07:33,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:07:33,249 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:07:33,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33 WrapperNode [2019-11-07 04:07:33,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:07:33,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:07:33,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:07:33,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:07:33,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... [2019-11-07 04:07:33,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:07:33,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:07:33,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:07:33,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:07:33,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:07:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:07:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:07:33,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 04:07:33,537 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 04:07:33,538 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 04:07:33,539 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 04:07:33,539 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 04:07:33,539 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 04:07:33,539 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 04:07:33,539 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 04:07:33,540 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 04:07:33,541 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 04:07:33,541 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 04:07:33,541 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 04:07:33,541 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 04:07:33,545 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 04:07:33,545 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 04:07:33,545 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 04:07:33,545 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 04:07:33,546 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 04:07:33,546 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 04:07:33,546 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 04:07:33,546 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 04:07:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 04:07:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 04:07:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 04:07:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 04:07:33,547 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 04:07:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 04:07:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 04:07:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 04:07:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 04:07:33,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:07:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 04:07:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:33,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 04:07:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 04:07:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 04:07:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 04:07:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 04:07:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 04:07:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 04:07:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 04:07:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 04:07:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 04:07:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 04:07:33,552 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 04:07:33,552 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 04:07:33,552 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 04:07:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 04:07:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 04:07:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 04:07:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 04:07:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 04:07:33,554 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 04:07:33,554 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 04:07:33,555 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 04:07:33,555 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 04:07:33,555 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 04:07:33,555 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 04:07:33,555 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 04:07:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 04:07:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:07:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 04:07:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 04:07:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 04:07:33,556 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 04:07:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 04:07:33,557 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 04:07:33,558 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 04:07:33,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 04:07:33,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:07:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:07:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 04:07:33,559 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 04:07:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 04:07:33,560 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 04:07:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 04:07:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 04:07:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 04:07:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 04:07:33,561 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 04:07:33,562 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 04:07:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 04:07:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 04:07:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 04:07:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 04:07:33,563 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 04:07:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 04:07:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 04:07:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 04:07:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 04:07:33,564 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 04:07:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 04:07:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 04:07:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 04:07:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 04:07:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 04:07:33,565 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 04:07:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 04:07:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 04:07:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 04:07:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 04:07:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 04:07:33,566 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 04:07:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 04:07:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 04:07:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 04:07:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 04:07:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 04:07:33,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 04:07:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:07:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 04:07:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 04:07:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 04:07:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 04:07:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 04:07:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 04:07:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 04:07:33,570 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 04:07:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 04:07:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 04:07:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 04:07:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 04:07:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 04:07:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 04:07:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 04:07:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 04:07:33,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 04:07:33,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:07:33,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 04:07:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 04:07:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:07:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 04:07:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 04:07:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:07:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 04:07:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 04:07:33,582 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 04:07:33,583 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 04:07:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 04:07:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 04:07:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 04:07:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 04:07:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 04:07:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 04:07:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 04:07:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 04:07:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 04:07:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 04:07:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 04:07:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 04:07:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 04:07:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 04:07:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 04:07:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 04:07:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:07:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 04:07:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:07:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:07:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:07:38,624 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:07:38,624 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 04:07:38,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:38 BoogieIcfgContainer [2019-11-07 04:07:38,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:07:38,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:07:38,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:07:38,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:07:38,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:07:32" (1/3) ... [2019-11-07 04:07:38,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3460ce53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:38, skipping insertion in model container [2019-11-07 04:07:38,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:07:33" (2/3) ... [2019-11-07 04:07:38,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3460ce53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:07:38, skipping insertion in model container [2019-11-07 04:07:38,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:07:38" (3/3) ... [2019-11-07 04:07:38,634 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2019-11-07 04:07:38,644 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:07:38,654 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:07:38,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:07:38,696 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:07:38,696 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:07:38,697 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:07:38,697 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:07:38,697 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:07:38,697 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:07:38,697 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:07:38,697 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:07:38,729 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states. [2019-11-07 04:07:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 04:07:38,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:38,751 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:38,754 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:38,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2030703232, now seen corresponding path program 1 times [2019-11-07 04:07:38,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:38,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009066641] [2019-11-07 04:07:38,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 04:07:39,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009066641] [2019-11-07 04:07:39,528 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:39,529 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 04:07:39,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697535417] [2019-11-07 04:07:39,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:07:39,536 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:39,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:07:39,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:39,558 INFO L87 Difference]: Start difference. First operand 540 states. Second operand 7 states. [2019-11-07 04:07:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:41,063 INFO L93 Difference]: Finished difference Result 955 states and 1412 transitions. [2019-11-07 04:07:41,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 04:07:41,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2019-11-07 04:07:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:41,087 INFO L225 Difference]: With dead ends: 955 [2019-11-07 04:07:41,088 INFO L226 Difference]: Without dead ends: 537 [2019-11-07 04:07:41,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:07:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-11-07 04:07:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 531. [2019-11-07 04:07:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2019-11-07 04:07:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 763 transitions. [2019-11-07 04:07:41,233 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 763 transitions. Word has length 110 [2019-11-07 04:07:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:41,235 INFO L462 AbstractCegarLoop]: Abstraction has 531 states and 763 transitions. [2019-11-07 04:07:41,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:07:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 763 transitions. [2019-11-07 04:07:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 04:07:41,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:41,255 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:41,258 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1123858737, now seen corresponding path program 1 times [2019-11-07 04:07:41,259 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:41,259 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162815925] [2019-11-07 04:07:41,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-07 04:07:41,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162815925] [2019-11-07 04:07:41,542 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:41,542 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:07:41,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008328685] [2019-11-07 04:07:41,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:41,551 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:07:41,552 INFO L87 Difference]: Start difference. First operand 531 states and 763 transitions. Second operand 5 states. [2019-11-07 04:07:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:41,621 INFO L93 Difference]: Finished difference Result 1037 states and 1505 transitions. [2019-11-07 04:07:41,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:41,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-07 04:07:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:41,634 INFO L225 Difference]: With dead ends: 1037 [2019-11-07 04:07:41,634 INFO L226 Difference]: Without dead ends: 537 [2019-11-07 04:07:41,639 INFO L630 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 [2019-11-07 04:07:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-11-07 04:07:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2019-11-07 04:07:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2019-11-07 04:07:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 769 transitions. [2019-11-07 04:07:41,721 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 769 transitions. Word has length 150 [2019-11-07 04:07:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:41,726 INFO L462 AbstractCegarLoop]: Abstraction has 537 states and 769 transitions. [2019-11-07 04:07:41,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 769 transitions. [2019-11-07 04:07:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-07 04:07:41,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:41,738 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:41,738 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash -871471726, now seen corresponding path program 1 times [2019-11-07 04:07:41,739 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:41,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994916880] [2019-11-07 04:07:41,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:07:42,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994916880] [2019-11-07 04:07:42,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949926128] [2019-11-07 04:07:42,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:42,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:42,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-07 04:07:42,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-07 04:07:43,054 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:43,054 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2019-11-07 04:07:43,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069265838] [2019-11-07 04:07:43,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:43,055 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:43,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:43,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:07:43,056 INFO L87 Difference]: Start difference. First operand 537 states and 769 transitions. Second operand 4 states. [2019-11-07 04:07:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:43,300 INFO L93 Difference]: Finished difference Result 1082 states and 1589 transitions. [2019-11-07 04:07:43,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:43,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-11-07 04:07:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:43,306 INFO L225 Difference]: With dead ends: 1082 [2019-11-07 04:07:43,306 INFO L226 Difference]: Without dead ends: 576 [2019-11-07 04:07:43,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:07:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2019-11-07 04:07:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2019-11-07 04:07:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2019-11-07 04:07:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 842 transitions. [2019-11-07 04:07:43,344 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 842 transitions. Word has length 155 [2019-11-07 04:07:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:43,348 INFO L462 AbstractCegarLoop]: Abstraction has 576 states and 842 transitions. [2019-11-07 04:07:43,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 842 transitions. [2019-11-07 04:07:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-07 04:07:43,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:43,356 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 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] [2019-11-07 04:07:43,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:43,566 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1893345186, now seen corresponding path program 1 times [2019-11-07 04:07:43,566 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:43,567 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347889327] [2019-11-07 04:07:43,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 04:07:43,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347889327] [2019-11-07 04:07:43,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677493019] [2019-11-07 04:07:43,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:44,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:44,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-07 04:07:44,656 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 04:07:44,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:44,921 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-11-07 04:07:44,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612004885] [2019-11-07 04:07:44,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:44,922 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:44,922 INFO L87 Difference]: Start difference. First operand 576 states and 842 transitions. Second operand 4 states. [2019-11-07 04:07:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:45,158 INFO L93 Difference]: Finished difference Result 1160 states and 1734 transitions. [2019-11-07 04:07:45,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:45,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2019-11-07 04:07:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:45,164 INFO L225 Difference]: With dead ends: 1160 [2019-11-07 04:07:45,164 INFO L226 Difference]: Without dead ends: 615 [2019-11-07 04:07:45,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 439 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:07:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-11-07 04:07:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 615. [2019-11-07 04:07:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-11-07 04:07:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 915 transitions. [2019-11-07 04:07:45,200 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 915 transitions. Word has length 221 [2019-11-07 04:07:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:45,201 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 915 transitions. [2019-11-07 04:07:45,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 915 transitions. [2019-11-07 04:07:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-11-07 04:07:45,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:45,208 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:45,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:45,417 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash -628378331, now seen corresponding path program 1 times [2019-11-07 04:07:45,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:45,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411464572] [2019-11-07 04:07:45,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-07 04:07:45,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411464572] [2019-11-07 04:07:45,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412918684] [2019-11-07 04:07:45,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:46,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 3686 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:46,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-11-07 04:07:47,036 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-11-07 04:07:47,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:47,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 13 [2019-11-07 04:07:47,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109631630] [2019-11-07 04:07:47,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:47,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:47,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:07:47,370 INFO L87 Difference]: Start difference. First operand 615 states and 915 transitions. Second operand 4 states. [2019-11-07 04:07:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:47,592 INFO L93 Difference]: Finished difference Result 1238 states and 1879 transitions. [2019-11-07 04:07:47,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:47,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 286 [2019-11-07 04:07:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:47,600 INFO L225 Difference]: With dead ends: 1238 [2019-11-07 04:07:47,600 INFO L226 Difference]: Without dead ends: 654 [2019-11-07 04:07:47,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 575 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:07:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2019-11-07 04:07:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 654. [2019-11-07 04:07:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2019-11-07 04:07:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 988 transitions. [2019-11-07 04:07:47,635 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 988 transitions. Word has length 286 [2019-11-07 04:07:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:47,637 INFO L462 AbstractCegarLoop]: Abstraction has 654 states and 988 transitions. [2019-11-07 04:07:47,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 988 transitions. [2019-11-07 04:07:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2019-11-07 04:07:47,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:47,644 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:47,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:47,861 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1424055278, now seen corresponding path program 1 times [2019-11-07 04:07:47,864 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:47,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359938093] [2019-11-07 04:07:47,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-11-07 04:07:48,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359938093] [2019-11-07 04:07:48,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912286694] [2019-11-07 04:07:48,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:49,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 3689 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:49,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-07 04:07:49,273 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-07 04:07:49,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:07:49,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 4] total 13 [2019-11-07 04:07:49,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874533510] [2019-11-07 04:07:49,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:07:49,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:49,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:07:49,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2019-11-07 04:07:49,822 INFO L87 Difference]: Start difference. First operand 654 states and 988 transitions. Second operand 4 states. [2019-11-07 04:07:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:50,091 INFO L93 Difference]: Finished difference Result 1316 states and 2024 transitions. [2019-11-07 04:07:50,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:50,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 289 [2019-11-07 04:07:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:50,099 INFO L225 Difference]: With dead ends: 1316 [2019-11-07 04:07:50,099 INFO L226 Difference]: Without dead ends: 693 [2019-11-07 04:07:50,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 581 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:07:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2019-11-07 04:07:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2019-11-07 04:07:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2019-11-07 04:07:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1061 transitions. [2019-11-07 04:07:50,139 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1061 transitions. Word has length 289 [2019-11-07 04:07:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:50,144 INFO L462 AbstractCegarLoop]: Abstraction has 693 states and 1061 transitions. [2019-11-07 04:07:50,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:07:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1061 transitions. [2019-11-07 04:07:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-07 04:07:50,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:50,150 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2019-11-07 04:07:50,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:50,360 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 924630329, now seen corresponding path program 1 times [2019-11-07 04:07:50,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:50,362 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541813404] [2019-11-07 04:07:50,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-07 04:07:50,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541813404] [2019-11-07 04:07:50,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53968378] [2019-11-07 04:07:50,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:51,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 3309 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:07:51,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 04:07:51,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-07 04:07:51,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:51,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [12] total 15 [2019-11-07 04:07:51,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431778014] [2019-11-07 04:07:51,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:07:51,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:07:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2019-11-07 04:07:51,895 INFO L87 Difference]: Start difference. First operand 693 states and 1061 transitions. Second operand 5 states. [2019-11-07 04:07:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:52,493 INFO L93 Difference]: Finished difference Result 1394 states and 2169 transitions. [2019-11-07 04:07:52,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:07:52,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-11-07 04:07:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:52,499 INFO L225 Difference]: With dead ends: 1394 [2019-11-07 04:07:52,499 INFO L226 Difference]: Without dead ends: 732 [2019-11-07 04:07:52,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 463 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-11-07 04:07:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2019-11-07 04:07:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2019-11-07 04:07:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2019-11-07 04:07:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1134 transitions. [2019-11-07 04:07:52,534 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1134 transitions. Word has length 230 [2019-11-07 04:07:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:52,535 INFO L462 AbstractCegarLoop]: Abstraction has 732 states and 1134 transitions. [2019-11-07 04:07:52,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:07:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1134 transitions. [2019-11-07 04:07:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-07 04:07:52,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:52,540 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 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] [2019-11-07 04:07:52,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:52,748 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2069371432, now seen corresponding path program 1 times [2019-11-07 04:07:52,749 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:52,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711816725] [2019-11-07 04:07:52,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-11-07 04:07:53,163 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711816725] [2019-11-07 04:07:53,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362692466] [2019-11-07 04:07:53,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:53,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 3306 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 04:07:53,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:07:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 04:07:54,031 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:07:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-07 04:07:54,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:07:54,488 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [12] total 19 [2019-11-07 04:07:54,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312111212] [2019-11-07 04:07:54,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 04:07:54,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:54,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 04:07:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-11-07 04:07:54,497 INFO L87 Difference]: Start difference. First operand 732 states and 1134 transitions. Second operand 9 states. [2019-11-07 04:07:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:58,128 INFO L93 Difference]: Finished difference Result 2065 states and 3261 transitions. [2019-11-07 04:07:58,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 04:07:58,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 230 [2019-11-07 04:07:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:58,139 INFO L225 Difference]: With dead ends: 2065 [2019-11-07 04:07:58,139 INFO L226 Difference]: Without dead ends: 1364 [2019-11-07 04:07:58,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2019-11-07 04:07:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2019-11-07 04:07:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1325. [2019-11-07 04:07:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2019-11-07 04:07:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2100 transitions. [2019-11-07 04:07:58,197 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2100 transitions. Word has length 230 [2019-11-07 04:07:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:58,198 INFO L462 AbstractCegarLoop]: Abstraction has 1325 states and 2100 transitions. [2019-11-07 04:07:58,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 04:07:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2100 transitions. [2019-11-07 04:07:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 04:07:58,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:58,204 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:58,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:07:58,412 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 923283601, now seen corresponding path program 1 times [2019-11-07 04:07:58,413 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:58,413 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857448203] [2019-11-07 04:07:58,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:07:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-07 04:07:58,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857448203] [2019-11-07 04:07:58,600 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:07:58,600 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 04:07:58,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255762117] [2019-11-07 04:07:58,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 04:07:58,601 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:07:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 04:07:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:07:58,602 INFO L87 Difference]: Start difference. First operand 1325 states and 2100 transitions. Second operand 7 states. [2019-11-07 04:07:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:07:59,648 INFO L93 Difference]: Finished difference Result 2820 states and 4503 transitions. [2019-11-07 04:07:59,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 04:07:59,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 169 [2019-11-07 04:07:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:07:59,661 INFO L225 Difference]: With dead ends: 2820 [2019-11-07 04:07:59,661 INFO L226 Difference]: Without dead ends: 1279 [2019-11-07 04:07:59,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:07:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-11-07 04:07:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1262. [2019-11-07 04:07:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1262 states. [2019-11-07 04:07:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 1881 transitions. [2019-11-07 04:07:59,740 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 1881 transitions. Word has length 169 [2019-11-07 04:07:59,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:07:59,741 INFO L462 AbstractCegarLoop]: Abstraction has 1262 states and 1881 transitions. [2019-11-07 04:07:59,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 04:07:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 1881 transitions. [2019-11-07 04:07:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 04:07:59,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:07:59,746 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:07:59,746 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:07:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:07:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash -587514443, now seen corresponding path program 1 times [2019-11-07 04:07:59,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:07:59,747 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120799584] [2019-11-07 04:07:59,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:07:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-07 04:08:01,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120799584] [2019-11-07 04:08:01,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349275790] [2019-11-07 04:08:01,309 INFO L94 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 [2019-11-07 04:08:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:08:01,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 2928 conjuncts, 74 conjunts are in the unsatisfiable core [2019-11-07 04:08:01,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:08:03,354 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-11-07 04:08:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-07 04:08:03,677 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:08:04,140 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 43