/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:43:27,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:43:27,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:43:27,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:43:27,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:43:27,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:43:27,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:43:27,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:43:27,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:43:27,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:43:27,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:43:27,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:43:27,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:43:27,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:43:27,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:43:27,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:43:27,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:43:27,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:43:27,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:43:27,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:43:27,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:43:27,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:43:27,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:43:27,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:43:27,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:43:27,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:43:27,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:43:27,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:43:27,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:43:27,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:43:27,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:43:27,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:43:27,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:43:27,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:43:27,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:43:27,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:43:27,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:43:27,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:43:27,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:43:27,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:43:27,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:43:27,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:43:27,278 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:43:27,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:43:27,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:43:27,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:43:27,283 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:43:27,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:43:27,284 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:43:27,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:43:27,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:43:27,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:43:27,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:43:27,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:43:27,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:43:27,285 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:43:27,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:43:27,285 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:43:27,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:43:27,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:43:27,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:43:27,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:43:27,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:43:27,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:27,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:43:27,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:43:27,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:43:27,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:43:27,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:43:27,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:43:27,289 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 [2019-11-07 00:43:27,564 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:43:27,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:43:27,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:43:27,593 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:43:27,593 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:43:27,594 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product18.cil.c [2019-11-07 00:43:27,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b4b15f1/88e001d68f63459eae0b2cab4552939d/FLAGf5849f20d [2019-11-07 00:43:28,347 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:43:28,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product18.cil.c [2019-11-07 00:43:28,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b4b15f1/88e001d68f63459eae0b2cab4552939d/FLAGf5849f20d [2019-11-07 00:43:28,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82b4b15f1/88e001d68f63459eae0b2cab4552939d [2019-11-07 00:43:28,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:43:28,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:43:28,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:28,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:43:28,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:43:28,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:28" (1/1) ... [2019-11-07 00:43:28,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555e115a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:28, skipping insertion in model container [2019-11-07 00:43:28,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:43:28" (1/1) ... [2019-11-07 00:43:28,615 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:43:28,692 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:43:29,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:29,401 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:43:29,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:43:29,583 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:43:29,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29 WrapperNode [2019-11-07 00:43:29,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:43:29,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:43:29,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:43:29,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:43:29,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... [2019-11-07 00:43:29,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:43:29,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:43:29,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:43:29,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:43:29,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:43:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:43:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:43:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:43:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:43:29,885 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:43:29,885 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:43:29,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:29,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:43:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:43:29,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:43:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:43:29,888 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:43:29,889 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:43:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:43:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:43:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:43:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:43:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:43:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:43:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:43:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:43:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:43:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:43:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:43:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:43:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:43:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:43:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:43:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:43:29,894 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:43:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:43:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:43:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:43:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:43:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:43:29,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:43:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:43:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:43:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:43:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:43:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:43:29,896 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:43:29,897 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:43:29,897 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:43:29,897 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:43:29,897 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:43:29,897 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:43:29,897 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:43:29,898 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:43:29,898 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:43:29,898 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:43:29,898 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:43:29,898 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:43:29,899 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:43:29,899 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:43:29,899 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:29,900 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:43:29,900 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:43:29,900 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2019-11-07 00:43:29,901 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:43:29,901 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2019-11-07 00:43:29,901 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:43:29,901 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:43:29,902 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:43:29,902 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:43:29,902 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:43:29,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:29,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:43:29,903 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:43:29,904 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:43:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:43:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:43:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:43:29,904 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:43:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:43:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:43:29,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:43:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:43:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:43:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:43:29,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:43:29,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:43:29,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:43:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:43:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:43:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:43:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:43:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:43:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:43:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:43:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:43:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:43:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:43:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:43:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:43:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:43:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:43:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:43:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:43:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:43:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:43:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:43:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:43:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:43:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:43:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:43:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:43:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:43:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:43:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:43:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:43:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:43:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:43:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:43:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:43:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:43:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:43:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:43:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:43:29,916 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:43:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:43:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:43:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:43:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:43:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:43:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:43:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:43:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:43:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:43:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:43:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:43:29,924 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:43:29,924 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:43:29,928 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:43:29,928 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:43:29,928 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:43:29,929 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:43:29,929 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:43:29,929 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:43:29,930 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:43:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:43:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:43:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:43:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:43:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:43:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:43:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:43:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:43:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:43:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2019-11-07 00:43:29,939 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:43:29,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:43:29,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:43:32,487 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:43:32,488 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:43:32,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:32 BoogieIcfgContainer [2019-11-07 00:43:32,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:43:32,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:43:32,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:43:32,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:43:32,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:43:28" (1/3) ... [2019-11-07 00:43:32,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c0b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:32, skipping insertion in model container [2019-11-07 00:43:32,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:43:29" (2/3) ... [2019-11-07 00:43:32,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c0b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:43:32, skipping insertion in model container [2019-11-07 00:43:32,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:43:32" (3/3) ... [2019-11-07 00:43:32,501 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2019-11-07 00:43:32,513 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:43:32,525 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:43:32,538 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:43:32,582 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:43:32,583 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:43:32,583 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:43:32,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:43:32,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:43:32,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:43:32,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:43:32,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:43:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states. [2019-11-07 00:43:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 00:43:32,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:32,660 INFO L410 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] [2019-11-07 00:43:32,663 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1366421017, now seen corresponding path program 1 times [2019-11-07 00:43:32,682 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:32,683 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492941742] [2019-11-07 00:43:32,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:33,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492941742] [2019-11-07 00:43:33,369 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:33,369 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:33,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818476510] [2019-11-07 00:43:33,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:33,377 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:33,394 INFO L87 Difference]: Start difference. First operand 781 states. Second operand 7 states. [2019-11-07 00:43:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:33,684 INFO L93 Difference]: Finished difference Result 1227 states and 1992 transitions. [2019-11-07 00:43:33,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:33,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2019-11-07 00:43:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:33,727 INFO L225 Difference]: With dead ends: 1227 [2019-11-07 00:43:33,727 INFO L226 Difference]: Without dead ends: 622 [2019-11-07 00:43:33,741 INFO L630 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 [2019-11-07 00:43:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-07 00:43:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2019-11-07 00:43:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-07 00:43:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 991 transitions. [2019-11-07 00:43:33,897 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 991 transitions. Word has length 93 [2019-11-07 00:43:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:33,898 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 991 transitions. [2019-11-07 00:43:33,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 991 transitions. [2019-11-07 00:43:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:43:33,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:33,909 INFO L410 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] [2019-11-07 00:43:33,910 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1643390832, now seen corresponding path program 1 times [2019-11-07 00:43:33,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:33,911 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758330590] [2019-11-07 00:43:33,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:34,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758330590] [2019-11-07 00:43:34,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:34,222 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:34,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500964692] [2019-11-07 00:43:34,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:34,226 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:34,227 INFO L87 Difference]: Start difference. First operand 620 states and 991 transitions. Second operand 4 states. [2019-11-07 00:43:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:34,329 INFO L93 Difference]: Finished difference Result 1206 states and 1947 transitions. [2019-11-07 00:43:34,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:43:34,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-11-07 00:43:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:34,336 INFO L225 Difference]: With dead ends: 1206 [2019-11-07 00:43:34,337 INFO L226 Difference]: Without dead ends: 602 [2019-11-07 00:43:34,340 INFO L630 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 [2019-11-07 00:43:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-11-07 00:43:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2019-11-07 00:43:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2019-11-07 00:43:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 958 transitions. [2019-11-07 00:43:34,385 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 958 transitions. Word has length 94 [2019-11-07 00:43:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:34,385 INFO L462 AbstractCegarLoop]: Abstraction has 602 states and 958 transitions. [2019-11-07 00:43:34,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 958 transitions. [2019-11-07 00:43:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:43:34,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:34,388 INFO L410 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] [2019-11-07 00:43:34,388 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1305237044, now seen corresponding path program 1 times [2019-11-07 00:43:34,389 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:34,389 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944654511] [2019-11-07 00:43:34,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:34,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944654511] [2019-11-07 00:43:34,644 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:34,644 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:34,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281093350] [2019-11-07 00:43:34,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:34,646 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:34,646 INFO L87 Difference]: Start difference. First operand 602 states and 958 transitions. Second operand 7 states. [2019-11-07 00:43:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:34,742 INFO L93 Difference]: Finished difference Result 1175 states and 1889 transitions. [2019-11-07 00:43:34,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:34,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-11-07 00:43:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:34,748 INFO L225 Difference]: With dead ends: 1175 [2019-11-07 00:43:34,748 INFO L226 Difference]: Without dead ends: 596 [2019-11-07 00:43:34,751 INFO L630 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 [2019-11-07 00:43:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-07 00:43:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2019-11-07 00:43:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2019-11-07 00:43:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 945 transitions. [2019-11-07 00:43:34,789 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 945 transitions. Word has length 94 [2019-11-07 00:43:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:34,792 INFO L462 AbstractCegarLoop]: Abstraction has 596 states and 945 transitions. [2019-11-07 00:43:34,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 945 transitions. [2019-11-07 00:43:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:43:34,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:34,795 INFO L410 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] [2019-11-07 00:43:34,795 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1548689565, now seen corresponding path program 1 times [2019-11-07 00:43:34,796 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:34,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541772888] [2019-11-07 00:43:34,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:34,959 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541772888] [2019-11-07 00:43:34,959 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:34,959 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:34,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781129353] [2019-11-07 00:43:34,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:34,960 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:34,961 INFO L87 Difference]: Start difference. First operand 596 states and 945 transitions. Second operand 7 states. [2019-11-07 00:43:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:35,056 INFO L93 Difference]: Finished difference Result 1163 states and 1863 transitions. [2019-11-07 00:43:35,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:35,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-11-07 00:43:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:35,063 INFO L225 Difference]: With dead ends: 1163 [2019-11-07 00:43:35,064 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 00:43:35,069 INFO L630 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 [2019-11-07 00:43:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 00:43:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2019-11-07 00:43:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-07 00:43:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 932 transitions. [2019-11-07 00:43:35,102 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 932 transitions. Word has length 95 [2019-11-07 00:43:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:35,102 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 932 transitions. [2019-11-07 00:43:35,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 932 transitions. [2019-11-07 00:43:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:43:35,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:35,104 INFO L410 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] [2019-11-07 00:43:35,105 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:35,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1649028488, now seen corresponding path program 1 times [2019-11-07 00:43:35,105 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:35,106 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415374135] [2019-11-07 00:43:35,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:35,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415374135] [2019-11-07 00:43:35,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:35,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:35,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578503706] [2019-11-07 00:43:35,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:35,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:35,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:35,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:35,300 INFO L87 Difference]: Start difference. First operand 590 states and 932 transitions. Second operand 7 states. [2019-11-07 00:43:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:35,499 INFO L93 Difference]: Finished difference Result 1151 states and 1837 transitions. [2019-11-07 00:43:35,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:35,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-07 00:43:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:35,516 INFO L225 Difference]: With dead ends: 1151 [2019-11-07 00:43:35,516 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:35,519 INFO L630 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 [2019-11-07 00:43:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 919 transitions. [2019-11-07 00:43:35,552 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 919 transitions. Word has length 96 [2019-11-07 00:43:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:35,552 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 919 transitions. [2019-11-07 00:43:35,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 919 transitions. [2019-11-07 00:43:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:43:35,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:35,554 INFO L410 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] [2019-11-07 00:43:35,555 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash -260086663, now seen corresponding path program 1 times [2019-11-07 00:43:35,556 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:35,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121403523] [2019-11-07 00:43:35,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:35,733 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121403523] [2019-11-07 00:43:35,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:35,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:35,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310143535] [2019-11-07 00:43:35,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:35,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:35,741 INFO L87 Difference]: Start difference. First operand 584 states and 919 transitions. Second operand 7 states. [2019-11-07 00:43:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:35,826 INFO L93 Difference]: Finished difference Result 1139 states and 1811 transitions. [2019-11-07 00:43:35,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:43:35,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-07 00:43:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:35,837 INFO L225 Difference]: With dead ends: 1139 [2019-11-07 00:43:35,837 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:35,846 INFO L630 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 [2019-11-07 00:43:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 918 transitions. [2019-11-07 00:43:35,872 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 918 transitions. Word has length 96 [2019-11-07 00:43:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:35,873 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 918 transitions. [2019-11-07 00:43:35,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 918 transitions. [2019-11-07 00:43:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-07 00:43:35,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:35,877 INFO L410 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] [2019-11-07 00:43:35,877 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:35,878 INFO L82 PathProgramCache]: Analyzing trace with hash 146115361, now seen corresponding path program 1 times [2019-11-07 00:43:35,878 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:35,878 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285141100] [2019-11-07 00:43:35,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:36,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285141100] [2019-11-07 00:43:36,015 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:36,015 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:36,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325229551] [2019-11-07 00:43:36,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:36,016 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:36,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:36,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:36,016 INFO L87 Difference]: Start difference. First operand 584 states and 918 transitions. Second operand 5 states. [2019-11-07 00:43:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:36,094 INFO L93 Difference]: Finished difference Result 1138 states and 1808 transitions. [2019-11-07 00:43:36,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:36,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2019-11-07 00:43:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:36,100 INFO L225 Difference]: With dead ends: 1138 [2019-11-07 00:43:36,100 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:36,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 917 transitions. [2019-11-07 00:43:36,132 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 917 transitions. Word has length 97 [2019-11-07 00:43:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:36,133 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 917 transitions. [2019-11-07 00:43:36,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 917 transitions. [2019-11-07 00:43:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 00:43:36,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:36,136 INFO L410 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] [2019-11-07 00:43:36,136 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1759564154, now seen corresponding path program 1 times [2019-11-07 00:43:36,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:36,137 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790432077] [2019-11-07 00:43:36,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:36,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790432077] [2019-11-07 00:43:36,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:36,355 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:36,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273652676] [2019-11-07 00:43:36,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:36,356 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:36,357 INFO L87 Difference]: Start difference. First operand 584 states and 917 transitions. Second operand 5 states. [2019-11-07 00:43:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:36,430 INFO L93 Difference]: Finished difference Result 1138 states and 1806 transitions. [2019-11-07 00:43:36,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:36,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2019-11-07 00:43:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:36,436 INFO L225 Difference]: With dead ends: 1138 [2019-11-07 00:43:36,437 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:36,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 916 transitions. [2019-11-07 00:43:36,465 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 916 transitions. Word has length 98 [2019-11-07 00:43:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:36,468 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 916 transitions. [2019-11-07 00:43:36,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 916 transitions. [2019-11-07 00:43:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 00:43:36,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:36,470 INFO L410 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] [2019-11-07 00:43:36,470 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash -153149156, now seen corresponding path program 1 times [2019-11-07 00:43:36,471 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:36,471 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798905669] [2019-11-07 00:43:36,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:36,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798905669] [2019-11-07 00:43:36,605 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:36,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:36,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104898772] [2019-11-07 00:43:36,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:36,606 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:36,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:36,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:36,607 INFO L87 Difference]: Start difference. First operand 584 states and 916 transitions. Second operand 5 states. [2019-11-07 00:43:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:36,672 INFO L93 Difference]: Finished difference Result 1138 states and 1804 transitions. [2019-11-07 00:43:36,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:36,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-11-07 00:43:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:36,681 INFO L225 Difference]: With dead ends: 1138 [2019-11-07 00:43:36,682 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:36,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 915 transitions. [2019-11-07 00:43:36,707 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 915 transitions. Word has length 99 [2019-11-07 00:43:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:36,707 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 915 transitions. [2019-11-07 00:43:36,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 915 transitions. [2019-11-07 00:43:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-07 00:43:36,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:36,710 INFO L410 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] [2019-11-07 00:43:36,710 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1340953951, now seen corresponding path program 1 times [2019-11-07 00:43:36,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:36,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399599806] [2019-11-07 00:43:36,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:36,839 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399599806] [2019-11-07 00:43:36,839 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:36,840 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:43:36,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935810879] [2019-11-07 00:43:36,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:43:36,841 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:43:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:36,841 INFO L87 Difference]: Start difference. First operand 584 states and 915 transitions. Second operand 5 states. [2019-11-07 00:43:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:36,925 INFO L93 Difference]: Finished difference Result 1138 states and 1802 transitions. [2019-11-07 00:43:36,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:36,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 100 [2019-11-07 00:43:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:36,932 INFO L225 Difference]: With dead ends: 1138 [2019-11-07 00:43:36,932 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:36,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:43:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 914 transitions. [2019-11-07 00:43:36,965 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 914 transitions. Word has length 100 [2019-11-07 00:43:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:36,965 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 914 transitions. [2019-11-07 00:43:36,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:43:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 914 transitions. [2019-11-07 00:43:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 00:43:36,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:36,968 INFO L410 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] [2019-11-07 00:43:36,968 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1311064363, now seen corresponding path program 1 times [2019-11-07 00:43:36,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:36,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679139312] [2019-11-07 00:43:36,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:37,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679139312] [2019-11-07 00:43:37,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:37,178 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 00:43:37,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028865353] [2019-11-07 00:43:37,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:43:37,180 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:43:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-07 00:43:37,181 INFO L87 Difference]: Start difference. First operand 584 states and 914 transitions. Second operand 9 states. [2019-11-07 00:43:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:37,407 INFO L93 Difference]: Finished difference Result 1140 states and 1801 transitions. [2019-11-07 00:43:37,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:43:37,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 101 [2019-11-07 00:43:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:37,414 INFO L225 Difference]: With dead ends: 1140 [2019-11-07 00:43:37,414 INFO L226 Difference]: Without dead ends: 584 [2019-11-07 00:43:37,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:43:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-07 00:43:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-07 00:43:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-07 00:43:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 913 transitions. [2019-11-07 00:43:37,439 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 913 transitions. Word has length 101 [2019-11-07 00:43:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:37,440 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 913 transitions. [2019-11-07 00:43:37,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 00:43:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 913 transitions. [2019-11-07 00:43:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 00:43:37,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:37,442 INFO L410 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] [2019-11-07 00:43:37,442 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:37,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1044740887, now seen corresponding path program 1 times [2019-11-07 00:43:37,443 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:37,443 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654496588] [2019-11-07 00:43:37,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:37,631 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654496588] [2019-11-07 00:43:37,631 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:37,631 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 00:43:37,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581135755] [2019-11-07 00:43:37,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:43:37,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:37,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:43:37,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:43:37,633 INFO L87 Difference]: Start difference. First operand 584 states and 913 transitions. Second operand 8 states. [2019-11-07 00:43:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:40,649 INFO L93 Difference]: Finished difference Result 2123 states and 3381 transitions. [2019-11-07 00:43:40,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:43:40,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 101 [2019-11-07 00:43:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:40,663 INFO L225 Difference]: With dead ends: 2123 [2019-11-07 00:43:40,664 INFO L226 Difference]: Without dead ends: 1573 [2019-11-07 00:43:40,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2019-11-07 00:43:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1561. [2019-11-07 00:43:40,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1561 states. [2019-11-07 00:43:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2446 transitions. [2019-11-07 00:43:40,739 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2446 transitions. Word has length 101 [2019-11-07 00:43:40,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:40,740 INFO L462 AbstractCegarLoop]: Abstraction has 1561 states and 2446 transitions. [2019-11-07 00:43:40,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:43:40,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2446 transitions. [2019-11-07 00:43:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 00:43:40,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:40,741 INFO L410 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] [2019-11-07 00:43:40,742 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1821089815, now seen corresponding path program 1 times [2019-11-07 00:43:40,742 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:40,743 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828154758] [2019-11-07 00:43:40,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:40,931 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828154758] [2019-11-07 00:43:40,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095252912] [2019-11-07 00:43:40,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:41,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:41,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:41,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:41,708 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:41,709 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:41,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493268803] [2019-11-07 00:43:41,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:41,710 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:41,710 INFO L87 Difference]: Start difference. First operand 1561 states and 2446 transitions. Second operand 3 states. [2019-11-07 00:43:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:41,837 INFO L93 Difference]: Finished difference Result 4487 states and 7168 transitions. [2019-11-07 00:43:41,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:41,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-11-07 00:43:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:41,862 INFO L225 Difference]: With dead ends: 4487 [2019-11-07 00:43:41,862 INFO L226 Difference]: Without dead ends: 2960 [2019-11-07 00:43:41,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2019-11-07 00:43:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2854. [2019-11-07 00:43:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2854 states. [2019-11-07 00:43:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 4538 transitions. [2019-11-07 00:43:41,997 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 4538 transitions. Word has length 101 [2019-11-07 00:43:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:41,998 INFO L462 AbstractCegarLoop]: Abstraction has 2854 states and 4538 transitions. [2019-11-07 00:43:41,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 4538 transitions. [2019-11-07 00:43:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 00:43:41,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:41,999 INFO L410 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] [2019-11-07 00:43:42,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:42,207 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash -904097083, now seen corresponding path program 1 times [2019-11-07 00:43:42,208 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:42,209 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465564300] [2019-11-07 00:43:42,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:42,416 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465564300] [2019-11-07 00:43:42,416 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:42,416 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:42,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336248907] [2019-11-07 00:43:42,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:42,418 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:42,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:42,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:42,419 INFO L87 Difference]: Start difference. First operand 2854 states and 4538 transitions. Second operand 7 states. [2019-11-07 00:43:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:45,322 INFO L93 Difference]: Finished difference Result 8466 states and 13781 transitions. [2019-11-07 00:43:45,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:45,323 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 105 [2019-11-07 00:43:45,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:45,384 INFO L225 Difference]: With dead ends: 8466 [2019-11-07 00:43:45,384 INFO L226 Difference]: Without dead ends: 5646 [2019-11-07 00:43:45,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2019-11-07 00:43:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 5562. [2019-11-07 00:43:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5562 states. [2019-11-07 00:43:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 8972 transitions. [2019-11-07 00:43:45,730 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 8972 transitions. Word has length 105 [2019-11-07 00:43:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:45,731 INFO L462 AbstractCegarLoop]: Abstraction has 5562 states and 8972 transitions. [2019-11-07 00:43:45,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 8972 transitions. [2019-11-07 00:43:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-07 00:43:45,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:45,734 INFO L410 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] [2019-11-07 00:43:45,735 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:45,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1738268530, now seen corresponding path program 1 times [2019-11-07 00:43:45,736 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:45,736 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511018800] [2019-11-07 00:43:45,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 00:43:45,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511018800] [2019-11-07 00:43:45,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768288915] [2019-11-07 00:43:45,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:46,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:43:46,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:43:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:43:46,709 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:43:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:46,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:43:46,845 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-11-07 00:43:46,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377548846] [2019-11-07 00:43:46,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:43:46,856 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:43:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:46,857 INFO L87 Difference]: Start difference. First operand 5562 states and 8972 transitions. Second operand 3 states. [2019-11-07 00:43:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:47,172 INFO L93 Difference]: Finished difference Result 12253 states and 19941 transitions. [2019-11-07 00:43:47,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:43:47,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-11-07 00:43:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:47,235 INFO L225 Difference]: With dead ends: 12253 [2019-11-07 00:43:47,236 INFO L226 Difference]: Without dead ends: 6725 [2019-11-07 00:43:47,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:43:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2019-11-07 00:43:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 6536. [2019-11-07 00:43:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2019-11-07 00:43:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 10542 transitions. [2019-11-07 00:43:47,587 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 10542 transitions. Word has length 102 [2019-11-07 00:43:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:47,588 INFO L462 AbstractCegarLoop]: Abstraction has 6536 states and 10542 transitions. [2019-11-07 00:43:47,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:43:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 10542 transitions. [2019-11-07 00:43:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 00:43:47,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:47,592 INFO L410 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] [2019-11-07 00:43:47,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:43:47,811 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash 895998947, now seen corresponding path program 1 times [2019-11-07 00:43:47,812 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:47,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003059001] [2019-11-07 00:43:47,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 00:43:47,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003059001] [2019-11-07 00:43:47,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:47,943 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:47,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13332018] [2019-11-07 00:43:47,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:47,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:47,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:47,945 INFO L87 Difference]: Start difference. First operand 6536 states and 10542 transitions. Second operand 4 states. [2019-11-07 00:43:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:48,294 INFO L93 Difference]: Finished difference Result 13030 states and 21221 transitions. [2019-11-07 00:43:48,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:48,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-11-07 00:43:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:48,377 INFO L225 Difference]: With dead ends: 13030 [2019-11-07 00:43:48,378 INFO L226 Difference]: Without dead ends: 6528 [2019-11-07 00:43:48,414 INFO L630 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 [2019-11-07 00:43:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2019-11-07 00:43:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 6506. [2019-11-07 00:43:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6506 states. [2019-11-07 00:43:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 10454 transitions. [2019-11-07 00:43:48,684 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 10454 transitions. Word has length 105 [2019-11-07 00:43:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:48,684 INFO L462 AbstractCegarLoop]: Abstraction has 6506 states and 10454 transitions. [2019-11-07 00:43:48,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 10454 transitions. [2019-11-07 00:43:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-07 00:43:48,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:48,687 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:48,687 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash 371384462, now seen corresponding path program 1 times [2019-11-07 00:43:48,688 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:48,688 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300261062] [2019-11-07 00:43:48,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 00:43:48,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300261062] [2019-11-07 00:43:48,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:48,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:48,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182964351] [2019-11-07 00:43:48,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:48,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:48,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:48,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:48,866 INFO L87 Difference]: Start difference. First operand 6506 states and 10454 transitions. Second operand 7 states. [2019-11-07 00:43:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:51,777 INFO L93 Difference]: Finished difference Result 19472 states and 32093 transitions. [2019-11-07 00:43:51,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:51,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-11-07 00:43:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:51,895 INFO L225 Difference]: With dead ends: 19472 [2019-11-07 00:43:51,895 INFO L226 Difference]: Without dead ends: 13000 [2019-11-07 00:43:51,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13000 states. [2019-11-07 00:43:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13000 to 12872. [2019-11-07 00:43:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12872 states. [2019-11-07 00:43:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12872 states to 12872 states and 21078 transitions. [2019-11-07 00:43:53,097 INFO L78 Accepts]: Start accepts. Automaton has 12872 states and 21078 transitions. Word has length 113 [2019-11-07 00:43:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:53,099 INFO L462 AbstractCegarLoop]: Abstraction has 12872 states and 21078 transitions. [2019-11-07 00:43:53,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:43:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12872 states and 21078 transitions. [2019-11-07 00:43:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-07 00:43:53,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:53,101 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:53,102 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1426044095, now seen corresponding path program 1 times [2019-11-07 00:43:53,102 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:53,102 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578191227] [2019-11-07 00:43:53,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 00:43:53,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578191227] [2019-11-07 00:43:53,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:53,224 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:43:53,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714364123] [2019-11-07 00:43:53,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:43:53,225 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:43:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:43:53,225 INFO L87 Difference]: Start difference. First operand 12872 states and 21078 transitions. Second operand 4 states. [2019-11-07 00:43:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:53,656 INFO L93 Difference]: Finished difference Result 25772 states and 42663 transitions. [2019-11-07 00:43:53,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:43:53,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2019-11-07 00:43:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:53,748 INFO L225 Difference]: With dead ends: 25772 [2019-11-07 00:43:53,748 INFO L226 Difference]: Without dead ends: 12928 [2019-11-07 00:43:53,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:43:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12928 states. [2019-11-07 00:43:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12928 to 12880. [2019-11-07 00:43:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12880 states. [2019-11-07 00:43:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 21029 transitions. [2019-11-07 00:43:54,436 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 21029 transitions. Word has length 114 [2019-11-07 00:43:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:43:54,437 INFO L462 AbstractCegarLoop]: Abstraction has 12880 states and 21029 transitions. [2019-11-07 00:43:54,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:43:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 21029 transitions. [2019-11-07 00:43:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 00:43:54,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:43:54,439 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:43:54,440 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:43:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:43:54,440 INFO L82 PathProgramCache]: Analyzing trace with hash -409974559, now seen corresponding path program 1 times [2019-11-07 00:43:54,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:43:54,440 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141422388] [2019-11-07 00:43:54,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:43:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:43:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:43:54,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141422388] [2019-11-07 00:43:54,590 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:43:54,590 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:43:54,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563287518] [2019-11-07 00:43:54,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:43:54,592 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:43:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:43:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:43:54,593 INFO L87 Difference]: Start difference. First operand 12880 states and 21029 transitions. Second operand 7 states. [2019-11-07 00:43:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:43:57,857 INFO L93 Difference]: Finished difference Result 38710 states and 65262 transitions. [2019-11-07 00:43:57,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:43:57,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2019-11-07 00:43:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:43:58,025 INFO L225 Difference]: With dead ends: 38710 [2019-11-07 00:43:58,025 INFO L226 Difference]: Without dead ends: 25864 [2019-11-07 00:43:58,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:43:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25864 states.