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_spec2_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:07:49,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:07:49,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:07:49,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:07:49,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:07:49,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:07:49,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:07:49,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:07:49,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:07:49,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:07:49,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:07:49,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:07:49,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:07:49,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:07:49,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:07:49,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:07:49,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:07:49,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:07:49,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:07:49,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:07:49,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:07:49,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:07:49,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:07:49,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:07:49,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:07:49,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:07:49,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:07:49,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:07:49,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:07:49,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:07:49,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:07:49,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:07:49,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:07:49,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:07:49,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:07:49,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:07:49,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:07:49,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:07:49,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:07:49,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:07:49,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:07:49,294 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 [2019-10-15 03:07:49,349 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:07:49,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:07:49,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:07:49,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:07:49,354 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:07:49,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:07:49,355 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:07:49,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:07:49,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:07:49,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:07:49,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:07:49,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:07:49,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:07:49,358 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:07:49,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:07:49,359 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:07:49,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:07:49,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:07:49,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:07:49,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:07:49,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:07:49,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:07:49,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:07:49,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:07:49,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:07:49,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:07:49,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:07:49,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:07:49,362 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 [2019-10-15 03:07:49,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:07:49,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:07:49,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:07:49,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:07:49,805 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:07:49,807 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product01.cil.c [2019-10-15 03:07:49,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a05c82d6/ee712843b14e4de186fee992ffd6b0bc/FLAG11df01205 [2019-10-15 03:07:50,692 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:07:50,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product01.cil.c [2019-10-15 03:07:50,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a05c82d6/ee712843b14e4de186fee992ffd6b0bc/FLAG11df01205 [2019-10-15 03:07:50,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a05c82d6/ee712843b14e4de186fee992ffd6b0bc [2019-10-15 03:07:50,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:07:50,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:07:50,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:07:50,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:07:50,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:07:50,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:07:50" (1/1) ... [2019-10-15 03:07:50,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e53d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:50, skipping insertion in model container [2019-10-15 03:07:50,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:07:50" (1/1) ... [2019-10-15 03:07:50,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:07:51,035 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:07:51,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:07:51,943 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:07:52,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:07:52,275 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:07:52,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52 WrapperNode [2019-10-15 03:07:52,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:07:52,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:07:52,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:07:52,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:07:52,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (1/1) ... [2019-10-15 03:07:52,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:07:52,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:07:52,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:07:52,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:07:52,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (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 [2019-10-15 03:07:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:07:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:07:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-15 03:07:52,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-15 03:07:52,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-15 03:07:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-15 03:07:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-15 03:07:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-15 03:07:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-15 03:07:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-15 03:07:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-15 03:07:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-15 03:07:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-15 03:07:52,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-15 03:07:52,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-15 03:07:52,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-15 03:07:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-15 03:07:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-15 03:07:52,829 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-15 03:07:52,829 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-15 03:07:52,830 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-15 03:07:52,832 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-15 03:07:52,834 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-15 03:07:52,834 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-15 03:07:52,835 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-15 03:07:52,835 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-15 03:07:52,836 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-15 03:07:52,836 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-15 03:07:52,837 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-15 03:07:52,837 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-15 03:07:52,838 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-15 03:07:52,839 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-15 03:07:52,839 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-15 03:07:52,840 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-15 03:07:52,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:07:52,840 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-15 03:07:52,841 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-15 03:07:52,841 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-15 03:07:52,842 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-15 03:07:52,843 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-15 03:07:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-15 03:07:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-15 03:07:52,844 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-15 03:07:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-15 03:07:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-15 03:07:52,845 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-15 03:07:52,846 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-15 03:07:52,846 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-15 03:07:52,847 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-15 03:07:52,847 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-15 03:07:52,847 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-15 03:07:52,847 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-15 03:07:52,848 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-15 03:07:52,848 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-15 03:07:52,850 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-15 03:07:52,850 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-15 03:07:52,850 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-15 03:07:52,850 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-15 03:07:52,851 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-15 03:07:52,853 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-15 03:07:52,854 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-15 03:07:52,854 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-15 03:07:52,854 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-15 03:07:52,854 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-15 03:07:52,855 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-15 03:07:52,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-15 03:07:52,856 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-15 03:07:52,856 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-15 03:07:52,856 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-15 03:07:52,857 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-15 03:07:52,858 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-15 03:07:52,858 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-15 03:07:52,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:07:52,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:07:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-15 03:07:52,862 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-15 03:07:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-15 03:07:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-15 03:07:52,864 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-15 03:07:52,865 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-15 03:07:52,865 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-15 03:07:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-15 03:07:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-15 03:07:52,866 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-15 03:07:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-15 03:07:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-15 03:07:52,871 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-15 03:07:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-15 03:07:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 03:07:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 03:07:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-15 03:07:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 03:07:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 03:07:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:07:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 03:07:52,874 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-15 03:07:52,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:07:52,874 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-15 03:07:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-15 03:07:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:07:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-15 03:07:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-15 03:07:52,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:07:52,879 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-15 03:07:52,880 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 03:07:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-15 03:07:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-15 03:07:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-15 03:07:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-15 03:07:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-15 03:07:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-15 03:07:52,886 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-15 03:07:52,890 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-15 03:07:52,891 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-15 03:07:52,892 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-15 03:07:52,892 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-15 03:07:52,894 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-15 03:07:52,896 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-15 03:07:52,896 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-15 03:07:52,897 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-15 03:07:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-15 03:07:52,898 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-15 03:07:52,899 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-15 03:07:52,899 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-15 03:07:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-15 03:07:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-15 03:07:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-15 03:07:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-15 03:07:52,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:07:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-15 03:07:52,901 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-15 03:07:52,902 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-15 03:07:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-15 03:07:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-15 03:07:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-15 03:07:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-15 03:07:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-15 03:07:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-15 03:07:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-15 03:07:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-15 03:07:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-15 03:07:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-15 03:07:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-15 03:07:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-15 03:07:52,942 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-15 03:07:52,943 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-15 03:07:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-15 03:07:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-15 03:07:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-15 03:07:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-15 03:07:52,944 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-15 03:07:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-15 03:07:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-15 03:07:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-15 03:07:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-15 03:07:52,945 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-15 03:07:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:07:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 03:07:52,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:07:59,814 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:07:59,814 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 03:07:59,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:07:59 BoogieIcfgContainer [2019-10-15 03:07:59,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:07:59,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:07:59,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:07:59,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:07:59,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:07:50" (1/3) ... [2019-10-15 03:07:59,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650593f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:07:59, skipping insertion in model container [2019-10-15 03:07:59,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:07:52" (2/3) ... [2019-10-15 03:07:59,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650593f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:07:59, skipping insertion in model container [2019-10-15 03:07:59,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:07:59" (3/3) ... [2019-10-15 03:07:59,825 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product01.cil.c [2019-10-15 03:07:59,836 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:07:59,848 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:07:59,861 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:07:59,896 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:07:59,897 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:07:59,897 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:07:59,897 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:07:59,897 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:07:59,897 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:07:59,897 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:07:59,897 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:07:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states. [2019-10-15 03:07:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 03:07:59,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:07:59,949 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:07:59,951 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:07:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:07:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash 532440466, now seen corresponding path program 1 times [2019-10-15 03:07:59,969 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:07:59,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90064186] [2019-10-15 03:07:59,970 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:59,970 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:07:59,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:08:00,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90064186] [2019-10-15 03:08:00,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:00,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:08:00,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122158185] [2019-10-15 03:08:00,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:08:00,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:08:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:08:00,742 INFO L87 Difference]: Start difference. First operand 530 states. Second operand 2 states. [2019-10-15 03:08:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:00,818 INFO L93 Difference]: Finished difference Result 433 states and 655 transitions. [2019-10-15 03:08:00,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:08:00,820 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 92 [2019-10-15 03:08:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:00,876 INFO L225 Difference]: With dead ends: 433 [2019-10-15 03:08:00,877 INFO L226 Difference]: Without dead ends: 399 [2019-10-15 03:08:00,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:08:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-10-15 03:08:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2019-10-15 03:08:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2019-10-15 03:08:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 604 transitions. [2019-10-15 03:08:01,021 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 604 transitions. Word has length 92 [2019-10-15 03:08:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:01,024 INFO L462 AbstractCegarLoop]: Abstraction has 399 states and 604 transitions. [2019-10-15 03:08:01,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:08:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 604 transitions. [2019-10-15 03:08:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-15 03:08:01,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:01,034 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:01,035 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1140994649, now seen corresponding path program 1 times [2019-10-15 03:08:01,035 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:01,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154308307] [2019-10-15 03:08:01,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:01,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:01,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:08:01,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154308307] [2019-10-15 03:08:01,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:01,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:08:01,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822883157] [2019-10-15 03:08:01,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:08:01,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:08:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:08:01,577 INFO L87 Difference]: Start difference. First operand 399 states and 604 transitions. Second operand 8 states. [2019-10-15 03:08:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:01,806 INFO L93 Difference]: Finished difference Result 795 states and 1235 transitions. [2019-10-15 03:08:01,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:08:01,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2019-10-15 03:08:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:01,816 INFO L225 Difference]: With dead ends: 795 [2019-10-15 03:08:01,816 INFO L226 Difference]: Without dead ends: 438 [2019-10-15 03:08:01,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:08:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-15 03:08:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 403. [2019-10-15 03:08:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2019-10-15 03:08:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 608 transitions. [2019-10-15 03:08:01,901 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 608 transitions. Word has length 93 [2019-10-15 03:08:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:01,905 INFO L462 AbstractCegarLoop]: Abstraction has 403 states and 608 transitions. [2019-10-15 03:08:01,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:08:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 608 transitions. [2019-10-15 03:08:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-15 03:08:01,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:01,918 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:01,919 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1986946328, now seen corresponding path program 1 times [2019-10-15 03:08:01,919 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:01,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569859228] [2019-10-15 03:08:01,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:01,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:01,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:08:02,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569859228] [2019-10-15 03:08:02,234 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:02,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:08:02,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7295638] [2019-10-15 03:08:02,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:08:02,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:08:02,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:08:02,236 INFO L87 Difference]: Start difference. First operand 403 states and 608 transitions. Second operand 7 states. [2019-10-15 03:08:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:07,098 INFO L93 Difference]: Finished difference Result 1240 states and 1933 transitions. [2019-10-15 03:08:07,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 03:08:07,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2019-10-15 03:08:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:07,111 INFO L225 Difference]: With dead ends: 1240 [2019-10-15 03:08:07,112 INFO L226 Difference]: Without dead ends: 879 [2019-10-15 03:08:07,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-10-15 03:08:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2019-10-15 03:08:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 852. [2019-10-15 03:08:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2019-10-15 03:08:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1331 transitions. [2019-10-15 03:08:07,215 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1331 transitions. Word has length 97 [2019-10-15 03:08:07,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:07,216 INFO L462 AbstractCegarLoop]: Abstraction has 852 states and 1331 transitions. [2019-10-15 03:08:07,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:08:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1331 transitions. [2019-10-15 03:08:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-15 03:08:07,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:07,219 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:07,220 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:07,220 INFO L82 PathProgramCache]: Analyzing trace with hash 312318611, now seen corresponding path program 1 times [2019-10-15 03:08:07,221 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:07,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740138915] [2019-10-15 03:08:07,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:07,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:07,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:08:07,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740138915] [2019-10-15 03:08:07,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:07,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 03:08:07,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883995141] [2019-10-15 03:08:07,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:08:07,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:08:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:08:07,540 INFO L87 Difference]: Start difference. First operand 852 states and 1331 transitions. Second operand 5 states. [2019-10-15 03:08:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:07,722 INFO L93 Difference]: Finished difference Result 1350 states and 2121 transitions. [2019-10-15 03:08:07,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:08:07,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2019-10-15 03:08:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:07,744 INFO L225 Difference]: With dead ends: 1350 [2019-10-15 03:08:07,744 INFO L226 Difference]: Without dead ends: 874 [2019-10-15 03:08:07,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:08:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2019-10-15 03:08:07,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 864. [2019-10-15 03:08:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2019-10-15 03:08:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1346 transitions. [2019-10-15 03:08:07,871 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1346 transitions. Word has length 101 [2019-10-15 03:08:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:07,874 INFO L462 AbstractCegarLoop]: Abstraction has 864 states and 1346 transitions. [2019-10-15 03:08:07,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:08:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1346 transitions. [2019-10-15 03:08:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 03:08:07,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:07,879 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:07,879 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:07,880 INFO L82 PathProgramCache]: Analyzing trace with hash 664886123, now seen corresponding path program 1 times [2019-10-15 03:08:07,880 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:07,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361848592] [2019-10-15 03:08:07,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:07,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:07,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:08:08,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361848592] [2019-10-15 03:08:08,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:08,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:08:08,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678326608] [2019-10-15 03:08:08,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:08:08,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:08:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:08:08,262 INFO L87 Difference]: Start difference. First operand 864 states and 1346 transitions. Second operand 8 states. [2019-10-15 03:08:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:13,407 INFO L93 Difference]: Finished difference Result 1833 states and 2859 transitions. [2019-10-15 03:08:13,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:08:13,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2019-10-15 03:08:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:13,416 INFO L225 Difference]: With dead ends: 1833 [2019-10-15 03:08:13,416 INFO L226 Difference]: Without dead ends: 1249 [2019-10-15 03:08:13,419 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:08:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2019-10-15 03:08:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1199. [2019-10-15 03:08:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2019-10-15 03:08:13,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1827 transitions. [2019-10-15 03:08:13,480 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1827 transitions. Word has length 105 [2019-10-15 03:08:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:13,481 INFO L462 AbstractCegarLoop]: Abstraction has 1199 states and 1827 transitions. [2019-10-15 03:08:13,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:08:13,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1827 transitions. [2019-10-15 03:08:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 03:08:13,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:13,484 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:13,484 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash -356943508, now seen corresponding path program 1 times [2019-10-15 03:08:13,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:13,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163783915] [2019-10-15 03:08:13,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:13,485 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:13,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:08:13,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163783915] [2019-10-15 03:08:13,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:13,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:08:13,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183722726] [2019-10-15 03:08:13,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:08:13,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:08:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:08:13,758 INFO L87 Difference]: Start difference. First operand 1199 states and 1827 transitions. Second operand 7 states. [2019-10-15 03:08:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:14,117 INFO L93 Difference]: Finished difference Result 2262 states and 3528 transitions. [2019-10-15 03:08:14,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:08:14,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2019-10-15 03:08:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:14,132 INFO L225 Difference]: With dead ends: 2262 [2019-10-15 03:08:14,132 INFO L226 Difference]: Without dead ends: 1199 [2019-10-15 03:08:14,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:08:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-10-15 03:08:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2019-10-15 03:08:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2019-10-15 03:08:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1795 transitions. [2019-10-15 03:08:14,233 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1795 transitions. Word has length 108 [2019-10-15 03:08:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:14,234 INFO L462 AbstractCegarLoop]: Abstraction has 1199 states and 1795 transitions. [2019-10-15 03:08:14,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:08:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1795 transitions. [2019-10-15 03:08:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 03:08:14,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:14,239 INFO L380 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] [2019-10-15 03:08:14,239 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2072523158, now seen corresponding path program 1 times [2019-10-15 03:08:14,240 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:14,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413683288] [2019-10-15 03:08:14,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:14,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:14,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:08:14,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413683288] [2019-10-15 03:08:14,601 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:14,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 03:08:14,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74421893] [2019-10-15 03:08:14,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:08:14,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:08:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:08:14,604 INFO L87 Difference]: Start difference. First operand 1199 states and 1795 transitions. Second operand 7 states. [2019-10-15 03:08:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:18,837 INFO L93 Difference]: Finished difference Result 2131 states and 3198 transitions. [2019-10-15 03:08:18,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 03:08:18,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2019-10-15 03:08:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:18,848 INFO L225 Difference]: With dead ends: 2131 [2019-10-15 03:08:18,848 INFO L226 Difference]: Without dead ends: 1269 [2019-10-15 03:08:18,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:08:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2019-10-15 03:08:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1226. [2019-10-15 03:08:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-10-15 03:08:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1829 transitions. [2019-10-15 03:08:18,910 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1829 transitions. Word has length 110 [2019-10-15 03:08:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:18,911 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1829 transitions. [2019-10-15 03:08:18,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:08:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1829 transitions. [2019-10-15 03:08:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-15 03:08:18,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:18,914 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:18,914 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2083914191, now seen corresponding path program 1 times [2019-10-15 03:08:18,915 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:18,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16224040] [2019-10-15 03:08:18,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:18,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:18,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:08:19,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16224040] [2019-10-15 03:08:19,070 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:19,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:08:19,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709038164] [2019-10-15 03:08:19,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:08:19,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:19,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:08:19,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:08:19,072 INFO L87 Difference]: Start difference. First operand 1226 states and 1829 transitions. Second operand 4 states. [2019-10-15 03:08:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:22,154 INFO L93 Difference]: Finished difference Result 3718 states and 5678 transitions. [2019-10-15 03:08:22,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:08:22,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2019-10-15 03:08:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:22,173 INFO L225 Difference]: With dead ends: 3718 [2019-10-15 03:08:22,173 INFO L226 Difference]: Without dead ends: 2534 [2019-10-15 03:08:22,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:08:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2019-10-15 03:08:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2389. [2019-10-15 03:08:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2019-10-15 03:08:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3622 transitions. [2019-10-15 03:08:22,302 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3622 transitions. Word has length 117 [2019-10-15 03:08:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:22,302 INFO L462 AbstractCegarLoop]: Abstraction has 2389 states and 3622 transitions. [2019-10-15 03:08:22,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:08:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3622 transitions. [2019-10-15 03:08:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 03:08:22,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:22,306 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:22,306 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash 175558638, now seen corresponding path program 1 times [2019-10-15 03:08:22,307 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:22,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382879845] [2019-10-15 03:08:22,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:22,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:22,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:08:22,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382879845] [2019-10-15 03:08:22,445 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:22,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:08:22,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438622347] [2019-10-15 03:08:22,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:08:22,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:22,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:08:22,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:08:22,446 INFO L87 Difference]: Start difference. First operand 2389 states and 3622 transitions. Second operand 4 states. [2019-10-15 03:08:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:24,732 INFO L93 Difference]: Finished difference Result 7129 states and 11061 transitions. [2019-10-15 03:08:24,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:08:24,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-15 03:08:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:24,775 INFO L225 Difference]: With dead ends: 7129 [2019-10-15 03:08:24,775 INFO L226 Difference]: Without dead ends: 4783 [2019-10-15 03:08:24,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:08:24,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2019-10-15 03:08:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4605. [2019-10-15 03:08:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4605 states. [2019-10-15 03:08:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 7074 transitions. [2019-10-15 03:08:25,100 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 7074 transitions. Word has length 118 [2019-10-15 03:08:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:08:25,101 INFO L462 AbstractCegarLoop]: Abstraction has 4605 states and 7074 transitions. [2019-10-15 03:08:25,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:08:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 7074 transitions. [2019-10-15 03:08:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 03:08:25,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:08:25,106 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:08:25,107 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:08:25,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:08:25,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1146082545, now seen corresponding path program 1 times [2019-10-15 03:08:25,108 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:08:25,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987293685] [2019-10-15 03:08:25,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:25,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:08:25,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:08:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:08:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:08:25,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987293685] [2019-10-15 03:08:25,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:08:25,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:08:25,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492143067] [2019-10-15 03:08:25,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:08:25,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:08:25,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:08:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:08:25,319 INFO L87 Difference]: Start difference. First operand 4605 states and 7074 transitions. Second operand 4 states. [2019-10-15 03:08:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:08:27,893 INFO L93 Difference]: Finished difference Result 13859 states and 22019 transitions. [2019-10-15 03:08:27,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:08:27,894 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2019-10-15 03:08:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:08:28,027 INFO L225 Difference]: With dead ends: 13859 [2019-10-15 03:08:28,028 INFO L226 Difference]: Without dead ends: 9299 [2019-10-15 03:08:28,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:08:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states.