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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec2_product22.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:10:50,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:10:50,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:10:50,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:10:50,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:10:50,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:10:50,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:10:50,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:10:50,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:10:50,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:10:50,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:10:50,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:10:50,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:10:50,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:10:50,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:10:50,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:10:50,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:10:50,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:10:50,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:10:50,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:10:50,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:10:50,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:10:50,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:10:50,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:10:50,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:10:50,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:10:50,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:10:50,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:10:50,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:10:50,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:10:50,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:10:50,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:10:50,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:10:50,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:10:50,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:10:50,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:10:50,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:10:50,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:10:50,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:10:50,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:10:50,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:10:50,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:10:50,313 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:10:50,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:10:50,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:10:50,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:10:50,315 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:10:50,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:10:50,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:10:50,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:10:50,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:10:50,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:10:50,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:10:50,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:10:50,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:10:50,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:10:50,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:10:50,318 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:10:50,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:10:50,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:10:50,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:10:50,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:10:50,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:10:50,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:10:50,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:10:50,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:10:50,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:10:50,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:10:50,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:10:50,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:10:50,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:10:50,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:10:50,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:10:50,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:10:50,625 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:10:50,625 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:10:50,626 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product22.cil.c [2019-10-13 21:10:50,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12f65052c/5553d02b696b42d3911431589dabab7c/FLAG14b880597 [2019-10-13 21:10:51,356 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:10:51,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product22.cil.c [2019-10-13 21:10:51,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12f65052c/5553d02b696b42d3911431589dabab7c/FLAG14b880597 [2019-10-13 21:10:51,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12f65052c/5553d02b696b42d3911431589dabab7c [2019-10-13 21:10:51,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:10:51,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:10:51,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:51,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:10:51,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:10:51,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:51" (1/1) ... [2019-10-13 21:10:51,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67af7f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:51, skipping insertion in model container [2019-10-13 21:10:51,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:10:51" (1/1) ... [2019-10-13 21:10:51,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:10:51,654 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:10:52,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:52,360 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:10:52,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:10:52,630 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:10:52,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52 WrapperNode [2019-10-13 21:10:52,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:10:52,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:10:52,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:10:52,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:10:52,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (1/1) ... [2019-10-13 21:10:52,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:10:52,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:10:52,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:10:52,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:10:52,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (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 [2019-10-13 21:10:52,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:10:52,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:10:52,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:52,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:10:52,901 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:10:52,901 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:10:52,901 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:10:52,902 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:10:52,902 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:10:52,902 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:10:52,902 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:10:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:10:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:10:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:10:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:10:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:10:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:10:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:10:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:10:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:10:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:10:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:10:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:10:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:10:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:10:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:10:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:10:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:10:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:10:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:10:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:10:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:10:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:10:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:10:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:10:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:10:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:10:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:10:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:10:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:10:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:10:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:10:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:10:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:10:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:10:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:10:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:10:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:10:52,912 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:10:52,913 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:10:52,913 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:10:52,913 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:10:52,913 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:10:52,914 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:10:52,914 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:10:52,914 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:10:52,914 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:10:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:10:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:10:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:10:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:10:52,915 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:10:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:10:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:10:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:10:52,916 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__twothirdsfull [2019-10-13 21:10:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:10:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:10:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:10:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:10:52,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:10:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:10:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:10:52,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:10:52,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:10:52,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:10:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:10:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:10:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:10:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:10:52,919 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:10:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:10:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:10:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:10:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:10:52,920 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:10:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:10:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:10:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:10:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:10:52,921 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:10:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:10:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:10:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:10:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:10:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:10:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:10:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:10:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:10:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:10:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:10:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:10:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:10:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:10:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:10:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:10:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:10:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:10:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:10:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:10:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:10:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:10:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:10:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:10:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:10:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:10:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:10:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:10:52,927 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:10:52,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:10:52,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:10:52,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:10:52,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:10:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:10:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:10:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:10:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:10:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:10:52,928 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:10:52,929 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:10:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:10:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:10:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:10:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:10:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:10:52,930 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:10:52,931 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:10:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:10:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:10:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-10-13 21:10:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:10:52,932 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:10:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-10-13 21:10:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:10:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:10:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:10:52,933 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2019-10-13 21:10:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:10:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__twothirdsfull [2019-10-13 21:10:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:10:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:10:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:10:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:10:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:10:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:10:55,356 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:10:55,357 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:10:55,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:55 BoogieIcfgContainer [2019-10-13 21:10:55,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:10:55,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:10:55,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:10:55,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:10:55,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:10:51" (1/3) ... [2019-10-13 21:10:55,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f1e17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:55, skipping insertion in model container [2019-10-13 21:10:55,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:10:52" (2/3) ... [2019-10-13 21:10:55,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f1e17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:10:55, skipping insertion in model container [2019-10-13 21:10:55,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:10:55" (3/3) ... [2019-10-13 21:10:55,369 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2019-10-13 21:10:55,380 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:10:55,390 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:10:55,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:10:55,450 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:10:55,450 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:10:55,450 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:10:55,450 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:10:55,450 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:10:55,450 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:10:55,451 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:10:55,451 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:10:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2019-10-13 21:10:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 21:10:55,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:55,530 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] [2019-10-13 21:10:55,533 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:55,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1360016176, now seen corresponding path program 1 times [2019-10-13 21:10:55,550 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:55,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684679194] [2019-10-13 21:10:55,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:55,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:55,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:56,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684679194] [2019-10-13 21:10:56,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:56,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:10:56,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285667920] [2019-10-13 21:10:56,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:56,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:56,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:56,197 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2019-10-13 21:10:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:56,478 INFO L93 Difference]: Finished difference Result 1227 states and 1983 transitions. [2019-10-13 21:10:56,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:56,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2019-10-13 21:10:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:56,529 INFO L225 Difference]: With dead ends: 1227 [2019-10-13 21:10:56,530 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 21:10:56,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 21:10:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 21:10:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 21:10:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 993 transitions. [2019-10-13 21:10:56,702 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 993 transitions. Word has length 85 [2019-10-13 21:10:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:56,703 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 993 transitions. [2019-10-13 21:10:56,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 993 transitions. [2019-10-13 21:10:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 21:10:56,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:56,708 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] [2019-10-13 21:10:56,709 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 372991960, now seen corresponding path program 1 times [2019-10-13 21:10:56,710 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:56,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39490123] [2019-10-13 21:10:56,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:56,710 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:56,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:56,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39490123] [2019-10-13 21:10:56,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:56,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:10:56,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255751650] [2019-10-13 21:10:56,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:56,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:56,935 INFO L87 Difference]: Start difference. First operand 622 states and 993 transitions. Second operand 4 states. [2019-10-13 21:10:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:57,037 INFO L93 Difference]: Finished difference Result 1207 states and 1944 transitions. [2019-10-13 21:10:57,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:57,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 21:10:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:57,045 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:10:57,045 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 21:10:57,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 21:10:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 21:10:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 21:10:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 992 transitions. [2019-10-13 21:10:57,144 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 992 transitions. Word has length 88 [2019-10-13 21:10:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:57,145 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 992 transitions. [2019-10-13 21:10:57,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 992 transitions. [2019-10-13 21:10:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 21:10:57,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:57,147 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] [2019-10-13 21:10:57,148 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash -155745473, now seen corresponding path program 1 times [2019-10-13 21:10:57,155 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:57,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703881030] [2019-10-13 21:10:57,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:57,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:57,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:57,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703881030] [2019-10-13 21:10:57,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:57,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:10:57,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995344609] [2019-10-13 21:10:57,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:57,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:57,414 INFO L87 Difference]: Start difference. First operand 622 states and 992 transitions. Second operand 4 states. [2019-10-13 21:10:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:57,479 INFO L93 Difference]: Finished difference Result 1207 states and 1943 transitions. [2019-10-13 21:10:57,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:57,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-10-13 21:10:57,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:57,485 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:10:57,485 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 21:10:57,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 21:10:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 21:10:57,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 21:10:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 991 transitions. [2019-10-13 21:10:57,516 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 991 transitions. Word has length 89 [2019-10-13 21:10:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:57,516 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 991 transitions. [2019-10-13 21:10:57,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 991 transitions. [2019-10-13 21:10:57,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 21:10:57,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:57,519 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] [2019-10-13 21:10:57,519 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash 714612788, now seen corresponding path program 1 times [2019-10-13 21:10:57,520 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:57,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514487955] [2019-10-13 21:10:57,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:57,520 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:57,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:57,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514487955] [2019-10-13 21:10:57,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:57,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:10:57,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561842438] [2019-10-13 21:10:57,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:57,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:57,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:57,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:57,640 INFO L87 Difference]: Start difference. First operand 622 states and 991 transitions. Second operand 4 states. [2019-10-13 21:10:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:57,697 INFO L93 Difference]: Finished difference Result 1207 states and 1942 transitions. [2019-10-13 21:10:57,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:57,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-10-13 21:10:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:57,711 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:10:57,711 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 21:10:57,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 21:10:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 21:10:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 21:10:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 990 transitions. [2019-10-13 21:10:57,737 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 990 transitions. Word has length 90 [2019-10-13 21:10:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:57,738 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 990 transitions. [2019-10-13 21:10:57,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 990 transitions. [2019-10-13 21:10:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 21:10:57,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:57,740 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] [2019-10-13 21:10:57,740 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2007264603, now seen corresponding path program 1 times [2019-10-13 21:10:57,741 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:57,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141755842] [2019-10-13 21:10:57,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:57,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:57,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:57,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141755842] [2019-10-13 21:10:57,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:57,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:10:57,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533822124] [2019-10-13 21:10:57,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:57,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:57,859 INFO L87 Difference]: Start difference. First operand 622 states and 990 transitions. Second operand 4 states. [2019-10-13 21:10:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:57,968 INFO L93 Difference]: Finished difference Result 1207 states and 1941 transitions. [2019-10-13 21:10:57,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:57,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-10-13 21:10:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:57,975 INFO L225 Difference]: With dead ends: 1207 [2019-10-13 21:10:57,975 INFO L226 Difference]: Without dead ends: 622 [2019-10-13 21:10:57,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-13 21:10:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-13 21:10:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-13 21:10:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 989 transitions. [2019-10-13 21:10:58,000 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 989 transitions. Word has length 91 [2019-10-13 21:10:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:58,000 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 989 transitions. [2019-10-13 21:10:58,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 989 transitions. [2019-10-13 21:10:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 21:10:58,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:58,003 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] [2019-10-13 21:10:58,003 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -788852592, now seen corresponding path program 1 times [2019-10-13 21:10:58,003 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:58,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603421265] [2019-10-13 21:10:58,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:58,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:58,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:58,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603421265] [2019-10-13 21:10:58,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:58,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 21:10:58,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672938092] [2019-10-13 21:10:58,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:10:58,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:10:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:10:58,186 INFO L87 Difference]: Start difference. First operand 622 states and 989 transitions. Second operand 10 states. [2019-10-13 21:10:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:58,374 INFO L93 Difference]: Finished difference Result 1165 states and 1861 transitions. [2019-10-13 21:10:58,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:10:58,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2019-10-13 21:10:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:58,380 INFO L225 Difference]: With dead ends: 1165 [2019-10-13 21:10:58,381 INFO L226 Difference]: Without dead ends: 631 [2019-10-13 21:10:58,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:10:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2019-10-13 21:10:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2019-10-13 21:10:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2019-10-13 21:10:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 998 transitions. [2019-10-13 21:10:58,410 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 998 transitions. Word has length 92 [2019-10-13 21:10:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:58,411 INFO L462 AbstractCegarLoop]: Abstraction has 629 states and 998 transitions. [2019-10-13 21:10:58,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:10:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 998 transitions. [2019-10-13 21:10:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 21:10:58,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:58,413 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] [2019-10-13 21:10:58,414 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash -768515217, now seen corresponding path program 1 times [2019-10-13 21:10:58,414 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:58,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255066293] [2019-10-13 21:10:58,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:58,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:58,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:58,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255066293] [2019-10-13 21:10:58,518 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:58,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:10:58,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053631315] [2019-10-13 21:10:58,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:10:58,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:10:58,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:10:58,520 INFO L87 Difference]: Start difference. First operand 629 states and 998 transitions. Second operand 4 states. [2019-10-13 21:10:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:58,577 INFO L93 Difference]: Finished difference Result 1213 states and 1947 transitions. [2019-10-13 21:10:58,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:10:58,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-13 21:10:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:58,584 INFO L225 Difference]: With dead ends: 1213 [2019-10-13 21:10:58,584 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 21:10:58,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:10:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 21:10:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2019-10-13 21:10:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2019-10-13 21:10:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 975 transitions. [2019-10-13 21:10:58,612 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 975 transitions. Word has length 92 [2019-10-13 21:10:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:58,612 INFO L462 AbstractCegarLoop]: Abstraction has 616 states and 975 transitions. [2019-10-13 21:10:58,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:10:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 975 transitions. [2019-10-13 21:10:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 21:10:58,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:58,614 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] [2019-10-13 21:10:58,615 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:58,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1799545833, now seen corresponding path program 1 times [2019-10-13 21:10:58,615 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:58,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821679848] [2019-10-13 21:10:58,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:58,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:58,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:58,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821679848] [2019-10-13 21:10:58,828 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:58,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:10:58,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498008420] [2019-10-13 21:10:58,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:10:58,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:58,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:10:58,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:10:58,830 INFO L87 Difference]: Start difference. First operand 616 states and 975 transitions. Second operand 6 states. [2019-10-13 21:10:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:59,052 INFO L93 Difference]: Finished difference Result 1153 states and 1839 transitions. [2019-10-13 21:10:59,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:59,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-10-13 21:10:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:59,060 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 21:10:59,060 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 21:10:59,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 21:10:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2019-10-13 21:10:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2019-10-13 21:10:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 971 transitions. [2019-10-13 21:10:59,096 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 971 transitions. Word has length 93 [2019-10-13 21:10:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:59,096 INFO L462 AbstractCegarLoop]: Abstraction has 616 states and 971 transitions. [2019-10-13 21:10:59,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:10:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 971 transitions. [2019-10-13 21:10:59,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:10:59,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:59,101 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] [2019-10-13 21:10:59,102 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash 522947091, now seen corresponding path program 1 times [2019-10-13 21:10:59,103 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:59,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346253738] [2019-10-13 21:10:59,103 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:59,103 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:59,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:59,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346253738] [2019-10-13 21:10:59,222 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:59,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:10:59,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202020363] [2019-10-13 21:10:59,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:10:59,223 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:59,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:10:59,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:10:59,224 INFO L87 Difference]: Start difference. First operand 616 states and 971 transitions. Second operand 6 states. [2019-10-13 21:10:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:59,421 INFO L93 Difference]: Finished difference Result 1153 states and 1835 transitions. [2019-10-13 21:10:59,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:59,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-10-13 21:10:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:59,427 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 21:10:59,427 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 21:10:59,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 21:10:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2019-10-13 21:10:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2019-10-13 21:10:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 967 transitions. [2019-10-13 21:10:59,459 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 967 transitions. Word has length 94 [2019-10-13 21:10:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:59,460 INFO L462 AbstractCegarLoop]: Abstraction has 616 states and 967 transitions. [2019-10-13 21:10:59,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:10:59,460 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 967 transitions. [2019-10-13 21:10:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:10:59,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:59,462 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] [2019-10-13 21:10:59,462 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash -435705042, now seen corresponding path program 1 times [2019-10-13 21:10:59,463 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:59,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458458971] [2019-10-13 21:10:59,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:59,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:59,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:10:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:10:59,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458458971] [2019-10-13 21:10:59,594 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:10:59,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:10:59,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805853990] [2019-10-13 21:10:59,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:10:59,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:10:59,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:10:59,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:10:59,596 INFO L87 Difference]: Start difference. First operand 616 states and 967 transitions. Second operand 6 states. [2019-10-13 21:10:59,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:10:59,877 INFO L93 Difference]: Finished difference Result 1153 states and 1831 transitions. [2019-10-13 21:10:59,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:10:59,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-13 21:10:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:10:59,883 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 21:10:59,883 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 21:10:59,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:10:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 21:10:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2019-10-13 21:10:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2019-10-13 21:10:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 963 transitions. [2019-10-13 21:10:59,921 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 963 transitions. Word has length 95 [2019-10-13 21:10:59,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:10:59,922 INFO L462 AbstractCegarLoop]: Abstraction has 616 states and 963 transitions. [2019-10-13 21:10:59,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:10:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 963 transitions. [2019-10-13 21:10:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:10:59,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:10:59,924 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] [2019-10-13 21:10:59,924 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:10:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:10:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash 612149166, now seen corresponding path program 1 times [2019-10-13 21:10:59,925 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:10:59,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978160083] [2019-10-13 21:10:59,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:59,925 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:10:59,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:10:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:00,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978160083] [2019-10-13 21:11:00,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:00,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:00,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388937121] [2019-10-13 21:11:00,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:00,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:00,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:00,057 INFO L87 Difference]: Start difference. First operand 616 states and 963 transitions. Second operand 7 states. [2019-10-13 21:11:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:00,142 INFO L93 Difference]: Finished difference Result 1153 states and 1827 transitions. [2019-10-13 21:11:00,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:00,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-10-13 21:11:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:00,148 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 21:11:00,148 INFO L226 Difference]: Without dead ends: 595 [2019-10-13 21:11:00,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-10-13 21:11:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-10-13 21:11:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-13 21:11:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 929 transitions. [2019-10-13 21:11:00,177 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 929 transitions. Word has length 95 [2019-10-13 21:11:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:00,177 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 929 transitions. [2019-10-13 21:11:00,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:00,178 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 929 transitions. [2019-10-13 21:11:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 21:11:00,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:00,179 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] [2019-10-13 21:11:00,179 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -127946888, now seen corresponding path program 1 times [2019-10-13 21:11:00,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:00,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964232659] [2019-10-13 21:11:00,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:00,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:00,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:00,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964232659] [2019-10-13 21:11:00,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:00,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:00,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602385447] [2019-10-13 21:11:00,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:00,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:00,304 INFO L87 Difference]: Start difference. First operand 595 states and 929 transitions. Second operand 6 states. [2019-10-13 21:11:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:00,401 INFO L93 Difference]: Finished difference Result 1132 states and 1793 transitions. [2019-10-13 21:11:00,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:00,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-13 21:11:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:00,406 INFO L225 Difference]: With dead ends: 1132 [2019-10-13 21:11:00,407 INFO L226 Difference]: Without dead ends: 595 [2019-10-13 21:11:00,410 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-10-13 21:11:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-10-13 21:11:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-13 21:11:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 928 transitions. [2019-10-13 21:11:00,432 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 928 transitions. Word has length 96 [2019-10-13 21:11:00,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:00,434 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 928 transitions. [2019-10-13 21:11:00,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 928 transitions. [2019-10-13 21:11:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 21:11:00,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:00,436 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] [2019-10-13 21:11:00,436 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:00,437 INFO L82 PathProgramCache]: Analyzing trace with hash 783824499, now seen corresponding path program 1 times [2019-10-13 21:11:00,437 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:00,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184920512] [2019-10-13 21:11:00,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:00,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:00,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:00,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184920512] [2019-10-13 21:11:00,606 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:00,606 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:00,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487185902] [2019-10-13 21:11:00,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:00,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:00,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:00,608 INFO L87 Difference]: Start difference. First operand 595 states and 928 transitions. Second operand 6 states. [2019-10-13 21:11:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:00,738 INFO L93 Difference]: Finished difference Result 1132 states and 1792 transitions. [2019-10-13 21:11:00,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:00,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-10-13 21:11:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:00,744 INFO L225 Difference]: With dead ends: 1132 [2019-10-13 21:11:00,745 INFO L226 Difference]: Without dead ends: 595 [2019-10-13 21:11:00,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-10-13 21:11:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-10-13 21:11:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-13 21:11:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 927 transitions. [2019-10-13 21:11:00,790 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 927 transitions. Word has length 97 [2019-10-13 21:11:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:00,790 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 927 transitions. [2019-10-13 21:11:00,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 927 transitions. [2019-10-13 21:11:00,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 21:11:00,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:00,794 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] [2019-10-13 21:11:00,794 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1054830371, now seen corresponding path program 1 times [2019-10-13 21:11:00,795 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:00,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530130028] [2019-10-13 21:11:00,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:00,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:00,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:01,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530130028] [2019-10-13 21:11:01,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:01,044 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:11:01,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914518816] [2019-10-13 21:11:01,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:11:01,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:11:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:01,046 INFO L87 Difference]: Start difference. First operand 595 states and 927 transitions. Second operand 12 states. [2019-10-13 21:11:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:01,234 INFO L93 Difference]: Finished difference Result 1133 states and 1791 transitions. [2019-10-13 21:11:01,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:11:01,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2019-10-13 21:11:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:01,241 INFO L225 Difference]: With dead ends: 1133 [2019-10-13 21:11:01,242 INFO L226 Difference]: Without dead ends: 595 [2019-10-13 21:11:01,246 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-10-13 21:11:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-10-13 21:11:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-13 21:11:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 926 transitions. [2019-10-13 21:11:01,277 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 926 transitions. Word has length 98 [2019-10-13 21:11:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:01,278 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 926 transitions. [2019-10-13 21:11:01,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:11:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 926 transitions. [2019-10-13 21:11:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 21:11:01,280 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:01,280 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] [2019-10-13 21:11:01,280 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:01,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1727482954, now seen corresponding path program 1 times [2019-10-13 21:11:01,281 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:01,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451685737] [2019-10-13 21:11:01,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:01,281 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:01,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:11:01,478 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451685737] [2019-10-13 21:11:01,479 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:01,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:01,479 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881611602] [2019-10-13 21:11:01,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:01,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:01,481 INFO L87 Difference]: Start difference. First operand 595 states and 926 transitions. Second operand 6 states. [2019-10-13 21:11:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:05,390 INFO L93 Difference]: Finished difference Result 1763 states and 2828 transitions. [2019-10-13 21:11:05,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:05,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2019-10-13 21:11:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:05,403 INFO L225 Difference]: With dead ends: 1763 [2019-10-13 21:11:05,403 INFO L226 Difference]: Without dead ends: 1234 [2019-10-13 21:11:05,407 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2019-10-13 21:11:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1109. [2019-10-13 21:11:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-10-13 21:11:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1772 transitions. [2019-10-13 21:11:05,463 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1772 transitions. Word has length 99 [2019-10-13 21:11:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:05,463 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1772 transitions. [2019-10-13 21:11:05,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1772 transitions. [2019-10-13 21:11:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:11:05,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:05,470 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:05,470 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash 593054676, now seen corresponding path program 1 times [2019-10-13 21:11:05,471 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:05,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120253793] [2019-10-13 21:11:05,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:05,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:05,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:05,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120253793] [2019-10-13 21:11:05,665 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:05,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:05,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730059081] [2019-10-13 21:11:05,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:05,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:05,667 INFO L87 Difference]: Start difference. First operand 1109 states and 1772 transitions. Second operand 6 states. [2019-10-13 21:11:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:10,102 INFO L93 Difference]: Finished difference Result 2873 states and 4702 transitions. [2019-10-13 21:11:10,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:11:10,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-13 21:11:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:10,117 INFO L225 Difference]: With dead ends: 2873 [2019-10-13 21:11:10,118 INFO L226 Difference]: Without dead ends: 1831 [2019-10-13 21:11:10,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2019-10-13 21:11:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1697. [2019-10-13 21:11:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1697 states. [2019-10-13 21:11:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2722 transitions. [2019-10-13 21:11:10,227 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2722 transitions. Word has length 149 [2019-10-13 21:11:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:10,228 INFO L462 AbstractCegarLoop]: Abstraction has 1697 states and 2722 transitions. [2019-10-13 21:11:10,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2722 transitions. [2019-10-13 21:11:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:11:10,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:10,234 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:10,234 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:10,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:10,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2131105979, now seen corresponding path program 1 times [2019-10-13 21:11:10,235 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:10,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712934962] [2019-10-13 21:11:10,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:10,236 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:10,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:10,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712934962] [2019-10-13 21:11:10,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:10,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:11:10,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131676708] [2019-10-13 21:11:10,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:11:10,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:10,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:11:10,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:10,461 INFO L87 Difference]: Start difference. First operand 1697 states and 2722 transitions. Second operand 12 states. [2019-10-13 21:11:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:21,632 INFO L93 Difference]: Finished difference Result 5461 states and 8753 transitions. [2019-10-13 21:11:21,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 21:11:21,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 149 [2019-10-13 21:11:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:21,657 INFO L225 Difference]: With dead ends: 5461 [2019-10-13 21:11:21,657 INFO L226 Difference]: Without dead ends: 3830 [2019-10-13 21:11:21,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-10-13 21:11:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2019-10-13 21:11:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3761. [2019-10-13 21:11:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3761 states. [2019-10-13 21:11:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3761 states to 3761 states and 5956 transitions. [2019-10-13 21:11:21,868 INFO L78 Accepts]: Start accepts. Automaton has 3761 states and 5956 transitions. Word has length 149 [2019-10-13 21:11:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:21,869 INFO L462 AbstractCegarLoop]: Abstraction has 3761 states and 5956 transitions. [2019-10-13 21:11:21,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:11:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3761 states and 5956 transitions. [2019-10-13 21:11:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 21:11:21,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:21,875 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:21,875 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash 386561165, now seen corresponding path program 1 times [2019-10-13 21:11:21,876 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:21,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865645476] [2019-10-13 21:11:21,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:21,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:21,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:22,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865645476] [2019-10-13 21:11:22,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:22,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:22,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118938192] [2019-10-13 21:11:22,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:22,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:22,035 INFO L87 Difference]: Start difference. First operand 3761 states and 5956 transitions. Second operand 6 states. [2019-10-13 21:11:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:26,405 INFO L93 Difference]: Finished difference Result 10571 states and 17104 transitions. [2019-10-13 21:11:26,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:11:26,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-13 21:11:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:26,446 INFO L225 Difference]: With dead ends: 10571 [2019-10-13 21:11:26,446 INFO L226 Difference]: Without dead ends: 6879 [2019-10-13 21:11:26,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2019-10-13 21:11:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 6465. [2019-10-13 21:11:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6465 states. [2019-10-13 21:11:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6465 states to 6465 states and 10238 transitions. [2019-10-13 21:11:26,834 INFO L78 Accepts]: Start accepts. Automaton has 6465 states and 10238 transitions. Word has length 150 [2019-10-13 21:11:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:26,835 INFO L462 AbstractCegarLoop]: Abstraction has 6465 states and 10238 transitions. [2019-10-13 21:11:26,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6465 states and 10238 transitions. [2019-10-13 21:11:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 21:11:26,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:26,841 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:26,842 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash -831969032, now seen corresponding path program 1 times [2019-10-13 21:11:26,842 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:26,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324286103] [2019-10-13 21:11:26,843 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:26,843 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:26,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:11:27,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324286103] [2019-10-13 21:11:27,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:27,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:27,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366364957] [2019-10-13 21:11:27,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:27,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:27,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:27,010 INFO L87 Difference]: Start difference. First operand 6465 states and 10238 transitions. Second operand 6 states.