/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_spec14_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:22,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:22,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:22,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:22,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:22,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:22,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:22,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:22,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:22,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:22,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:22,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:22,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:22,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:22,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:22,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:22,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:22,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:22,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:22,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:22,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:22,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:22,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:22,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:22,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:22,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:22,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:22,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:22,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:22,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:22,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:22,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:22,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:22,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:22,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:22,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:22,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:22,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:22,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:22,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:22,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:22,262 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 00:39:22,296 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:22,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:22,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:22,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:22,302 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:22,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:22,303 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:22,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:22,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:22,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:22,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:22,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:22,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:22,304 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:22,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:22,305 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:22,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:22,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:22,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:22,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:22,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:22,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:22,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:22,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:22,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:22,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:22,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:22,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:22,307 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 00:39:22,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:22,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:22,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:22,608 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:22,608 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:22,609 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product24.cil.c [2019-11-07 00:39:22,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf8b815/fed74a4c7ffc48188106d04602c75948/FLAGe6a77d565 [2019-11-07 00:39:23,297 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:23,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product24.cil.c [2019-11-07 00:39:23,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf8b815/fed74a4c7ffc48188106d04602c75948/FLAGe6a77d565 [2019-11-07 00:39:23,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2acf8b815/fed74a4c7ffc48188106d04602c75948 [2019-11-07 00:39:23,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:23,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:23,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:23,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:23,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:23,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:23" (1/1) ... [2019-11-07 00:39:23,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630fa84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:23, skipping insertion in model container [2019-11-07 00:39:23,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:23" (1/1) ... [2019-11-07 00:39:23,515 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:23,576 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:24,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:24,318 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:24,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:24,543 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:24,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24 WrapperNode [2019-11-07 00:39:24,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:24,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:24,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:24,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:24,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (1/1) ... [2019-11-07 00:39:24,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:24,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:24,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:24,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:24,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (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 00:39:24,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:24,835 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:24,837 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:24,837 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:24,837 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:24,837 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:24,838 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:24,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:24,842 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:24,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:24,842 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:24,842 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:24,843 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:24,843 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:39:24,843 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:24,843 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:24,843 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:24,844 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:24,844 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:24,844 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:24,844 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:24,844 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:39:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:39:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:39:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:39:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:24,847 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:24,847 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:24,847 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2019-11-07 00:39:24,847 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:24,847 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2019-11-07 00:39:24,848 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:24,848 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:24,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:24,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:24,848 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:24,848 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:24,849 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:24,850 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:24,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:24,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:24,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:24,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:24,854 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:24,854 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:24,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:24,855 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:24,856 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:24,856 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:24,856 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:24,859 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:24,860 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:24,863 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:24,863 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:24,863 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:24,863 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:24,866 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:39:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:24,868 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:24,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2019-11-07 00:39:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:39:24,875 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2019-11-07 00:39:24,876 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:39:24,877 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:24,882 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:24,883 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:24,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:24,885 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:24,885 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:24,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:24,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:27,424 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:27,424 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:27,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:27 BoogieIcfgContainer [2019-11-07 00:39:27,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:27,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:27,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:27,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:27,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:23" (1/3) ... [2019-11-07 00:39:27,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efd40e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:27, skipping insertion in model container [2019-11-07 00:39:27,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:24" (2/3) ... [2019-11-07 00:39:27,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efd40e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:27, skipping insertion in model container [2019-11-07 00:39:27,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:27" (3/3) ... [2019-11-07 00:39:27,435 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product24.cil.c [2019-11-07 00:39:27,445 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:27,455 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:27,467 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:27,500 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:27,500 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:27,500 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:27,500 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:27,500 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:27,500 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:27,501 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:27,501 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states. [2019-11-07 00:39:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-07 00:39:27,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:27,551 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] [2019-11-07 00:39:27,553 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1147677768, now seen corresponding path program 1 times [2019-11-07 00:39:27,570 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:27,570 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846772878] [2019-11-07 00:39:27,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,239 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 00:39:28,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846772878] [2019-11-07 00:39:28,241 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:28,242 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:28,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25158964] [2019-11-07 00:39:28,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:28,253 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:28,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:28,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:28,274 INFO L87 Difference]: Start difference. First operand 782 states. Second operand 4 states. [2019-11-07 00:39:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:28,530 INFO L93 Difference]: Finished difference Result 1248 states and 1986 transitions. [2019-11-07 00:39:28,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:28,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-11-07 00:39:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:28,566 INFO L225 Difference]: With dead ends: 1248 [2019-11-07 00:39:28,566 INFO L226 Difference]: Without dead ends: 627 [2019-11-07 00:39:28,580 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 00:39:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-11-07 00:39:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2019-11-07 00:39:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-07 00:39:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 984 transitions. [2019-11-07 00:39:28,703 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 984 transitions. Word has length 87 [2019-11-07 00:39:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:28,704 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 984 transitions. [2019-11-07 00:39:28,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 984 transitions. [2019-11-07 00:39:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-07 00:39:28,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:28,718 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] [2019-11-07 00:39:28,719 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash 169764925, now seen corresponding path program 1 times [2019-11-07 00:39:28,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:28,720 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521676998] [2019-11-07 00:39:28,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:28,915 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 00:39:28,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521676998] [2019-11-07 00:39:28,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:28,916 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:28,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018455809] [2019-11-07 00:39:28,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:28,921 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:28,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:28,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:28,922 INFO L87 Difference]: Start difference. First operand 627 states and 984 transitions. Second operand 4 states. [2019-11-07 00:39:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,048 INFO L93 Difference]: Finished difference Result 1221 states and 1929 transitions. [2019-11-07 00:39:29,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:29,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-11-07 00:39:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,055 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:39:29,055 INFO L226 Difference]: Without dead ends: 627 [2019-11-07 00:39:29,059 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 00:39:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-11-07 00:39:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2019-11-07 00:39:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-07 00:39:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 983 transitions. [2019-11-07 00:39:29,108 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 983 transitions. Word has length 88 [2019-11-07 00:39:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,109 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 983 transitions. [2019-11-07 00:39:29,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 983 transitions. [2019-11-07 00:39:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-07 00:39:29,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,114 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] [2019-11-07 00:39:29,115 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1535536684, now seen corresponding path program 1 times [2019-11-07 00:39:29,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213309806] [2019-11-07 00:39:29,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,330 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 00:39:29,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213309806] [2019-11-07 00:39:29,331 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,331 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:29,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806465567] [2019-11-07 00:39:29,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:29,334 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:29,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:29,334 INFO L87 Difference]: Start difference. First operand 627 states and 983 transitions. Second operand 4 states. [2019-11-07 00:39:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,468 INFO L93 Difference]: Finished difference Result 1221 states and 1928 transitions. [2019-11-07 00:39:29,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:29,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-11-07 00:39:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,479 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:39:29,479 INFO L226 Difference]: Without dead ends: 627 [2019-11-07 00:39:29,484 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 00:39:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-11-07 00:39:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2019-11-07 00:39:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-07 00:39:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 982 transitions. [2019-11-07 00:39:29,534 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 982 transitions. Word has length 89 [2019-11-07 00:39:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,535 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 982 transitions. [2019-11-07 00:39:29,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 982 transitions. [2019-11-07 00:39:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-07 00:39:29,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,538 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] [2019-11-07 00:39:29,538 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1838336153, now seen corresponding path program 1 times [2019-11-07 00:39:29,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,539 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662120342] [2019-11-07 00:39:29,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,685 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 00:39:29,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662120342] [2019-11-07 00:39:29,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:29,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866555259] [2019-11-07 00:39:29,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:29,687 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:29,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:29,688 INFO L87 Difference]: Start difference. First operand 627 states and 982 transitions. Second operand 4 states. [2019-11-07 00:39:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:29,767 INFO L93 Difference]: Finished difference Result 1221 states and 1927 transitions. [2019-11-07 00:39:29,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:29,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2019-11-07 00:39:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:29,779 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:39:29,779 INFO L226 Difference]: Without dead ends: 627 [2019-11-07 00:39:29,785 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 00:39:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-11-07 00:39:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2019-11-07 00:39:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-07 00:39:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 981 transitions. [2019-11-07 00:39:29,816 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 981 transitions. Word has length 90 [2019-11-07 00:39:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:29,817 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 981 transitions. [2019-11-07 00:39:29,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 981 transitions. [2019-11-07 00:39:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 00:39:29,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:29,825 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] [2019-11-07 00:39:29,826 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:29,826 INFO L82 PathProgramCache]: Analyzing trace with hash -542140432, now seen corresponding path program 1 times [2019-11-07 00:39:29,826 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:29,827 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099982527] [2019-11-07 00:39:29,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:29,980 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 00:39:29,981 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099982527] [2019-11-07 00:39:29,981 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:29,981 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:29,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430654886] [2019-11-07 00:39:29,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:29,982 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:29,983 INFO L87 Difference]: Start difference. First operand 627 states and 981 transitions. Second operand 4 states. [2019-11-07 00:39:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,059 INFO L93 Difference]: Finished difference Result 1221 states and 1926 transitions. [2019-11-07 00:39:30,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:30,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-11-07 00:39:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,071 INFO L225 Difference]: With dead ends: 1221 [2019-11-07 00:39:30,072 INFO L226 Difference]: Without dead ends: 627 [2019-11-07 00:39:30,078 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 00:39:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2019-11-07 00:39:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2019-11-07 00:39:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2019-11-07 00:39:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 980 transitions. [2019-11-07 00:39:30,108 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 980 transitions. Word has length 91 [2019-11-07 00:39:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,109 INFO L462 AbstractCegarLoop]: Abstraction has 627 states and 980 transitions. [2019-11-07 00:39:30,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 980 transitions. [2019-11-07 00:39:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 00:39:30,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,112 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] [2019-11-07 00:39:30,114 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash -918822667, now seen corresponding path program 1 times [2019-11-07 00:39:30,115 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441704579] [2019-11-07 00:39:30,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,373 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 00:39:30,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441704579] [2019-11-07 00:39:30,374 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:30,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:30,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945411766] [2019-11-07 00:39:30,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:30,376 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:30,379 INFO L87 Difference]: Start difference. First operand 627 states and 980 transitions. Second operand 10 states. [2019-11-07 00:39:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,584 INFO L93 Difference]: Finished difference Result 1226 states and 1933 transitions. [2019-11-07 00:39:30,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:30,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2019-11-07 00:39:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,593 INFO L225 Difference]: With dead ends: 1226 [2019-11-07 00:39:30,593 INFO L226 Difference]: Without dead ends: 636 [2019-11-07 00:39:30,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2019-11-07 00:39:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 634. [2019-11-07 00:39:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 990 transitions. [2019-11-07 00:39:30,631 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 990 transitions. Word has length 92 [2019-11-07 00:39:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,632 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 990 transitions. [2019-11-07 00:39:30,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 990 transitions. [2019-11-07 00:39:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 00:39:30,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,635 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] [2019-11-07 00:39:30,635 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash -817910700, now seen corresponding path program 1 times [2019-11-07 00:39:30,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675898131] [2019-11-07 00:39:30,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,745 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 00:39:30,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675898131] [2019-11-07 00:39:30,746 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:30,746 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:30,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151382381] [2019-11-07 00:39:30,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:30,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:30,748 INFO L87 Difference]: Start difference. First operand 634 states and 990 transitions. Second operand 4 states. [2019-11-07 00:39:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:30,817 INFO L93 Difference]: Finished difference Result 1227 states and 1934 transitions. [2019-11-07 00:39:30,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:30,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-11-07 00:39:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:30,824 INFO L225 Difference]: With dead ends: 1227 [2019-11-07 00:39:30,824 INFO L226 Difference]: Without dead ends: 630 [2019-11-07 00:39:30,827 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 00:39:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-11-07 00:39:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2019-11-07 00:39:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-11-07 00:39:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 983 transitions. [2019-11-07 00:39:30,852 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 983 transitions. Word has length 92 [2019-11-07 00:39:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:30,853 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 983 transitions. [2019-11-07 00:39:30,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 983 transitions. [2019-11-07 00:39:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-07 00:39:30,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:30,855 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 00:39:30,855 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1716994026, now seen corresponding path program 1 times [2019-11-07 00:39:30,856 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:30,856 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032624174] [2019-11-07 00:39:30,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:30,999 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 00:39:31,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032624174] [2019-11-07 00:39:31,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:31,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:31,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978661452] [2019-11-07 00:39:31,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:31,002 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:31,003 INFO L87 Difference]: Start difference. First operand 630 states and 983 transitions. Second operand 6 states. [2019-11-07 00:39:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:31,453 INFO L93 Difference]: Finished difference Result 1240 states and 1958 transitions. [2019-11-07 00:39:31,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:31,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-11-07 00:39:31,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:31,459 INFO L225 Difference]: With dead ends: 1240 [2019-11-07 00:39:31,460 INFO L226 Difference]: Without dead ends: 638 [2019-11-07 00:39:31,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-11-07 00:39:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 635. [2019-11-07 00:39:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-07 00:39:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 984 transitions. [2019-11-07 00:39:31,496 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 984 transitions. Word has length 93 [2019-11-07 00:39:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:31,498 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 984 transitions. [2019-11-07 00:39:31,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 984 transitions. [2019-11-07 00:39:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 00:39:31,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:31,500 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 00:39:31,500 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash 466217464, now seen corresponding path program 1 times [2019-11-07 00:39:31,501 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:31,501 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442857614] [2019-11-07 00:39:31,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:31,644 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 00:39:31,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442857614] [2019-11-07 00:39:31,645 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:31,645 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:31,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131510541] [2019-11-07 00:39:31,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:31,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:31,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:31,651 INFO L87 Difference]: Start difference. First operand 635 states and 984 transitions. Second operand 6 states. [2019-11-07 00:39:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:31,916 INFO L93 Difference]: Finished difference Result 1203 states and 1873 transitions. [2019-11-07 00:39:31,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:31,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-11-07 00:39:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:31,924 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:39:31,924 INFO L226 Difference]: Without dead ends: 635 [2019-11-07 00:39:31,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-07 00:39:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-11-07 00:39:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-07 00:39:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 980 transitions. [2019-11-07 00:39:31,957 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 980 transitions. Word has length 94 [2019-11-07 00:39:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:31,958 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 980 transitions. [2019-11-07 00:39:31,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 980 transitions. [2019-11-07 00:39:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:39:31,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:31,960 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 00:39:31,960 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1611435045, now seen corresponding path program 1 times [2019-11-07 00:39:31,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:31,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133784131] [2019-11-07 00:39:31,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,093 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 00:39:32,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133784131] [2019-11-07 00:39:32,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:32,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:32,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151439901] [2019-11-07 00:39:32,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:32,096 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:32,096 INFO L87 Difference]: Start difference. First operand 635 states and 980 transitions. Second operand 6 states. [2019-11-07 00:39:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,343 INFO L93 Difference]: Finished difference Result 1203 states and 1869 transitions. [2019-11-07 00:39:32,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:32,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-11-07 00:39:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:32,349 INFO L225 Difference]: With dead ends: 1203 [2019-11-07 00:39:32,349 INFO L226 Difference]: Without dead ends: 635 [2019-11-07 00:39:32,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-07 00:39:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2019-11-07 00:39:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2019-11-07 00:39:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 976 transitions. [2019-11-07 00:39:32,375 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 976 transitions. Word has length 95 [2019-11-07 00:39:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:32,376 INFO L462 AbstractCegarLoop]: Abstraction has 635 states and 976 transitions. [2019-11-07 00:39:32,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 976 transitions. [2019-11-07 00:39:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-07 00:39:32,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,378 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 00:39:32,378 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1788227675, now seen corresponding path program 1 times [2019-11-07 00:39:32,379 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:32,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321107240] [2019-11-07 00:39:32,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,577 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 00:39:32,577 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321107240] [2019-11-07 00:39:32,577 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:32,578 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:32,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536029406] [2019-11-07 00:39:32,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:32,579 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:32,580 INFO L87 Difference]: Start difference. First operand 635 states and 976 transitions. Second operand 7 states. [2019-11-07 00:39:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:32,691 INFO L93 Difference]: Finished difference Result 1206 states and 1869 transitions. [2019-11-07 00:39:32,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:32,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2019-11-07 00:39:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:32,697 INFO L225 Difference]: With dead ends: 1206 [2019-11-07 00:39:32,698 INFO L226 Difference]: Without dead ends: 617 [2019-11-07 00:39:32,701 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 00:39:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-11-07 00:39:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 614. [2019-11-07 00:39:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-11-07 00:39:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 939 transitions. [2019-11-07 00:39:32,723 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 939 transitions. Word has length 95 [2019-11-07 00:39:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:32,723 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 939 transitions. [2019-11-07 00:39:32,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 939 transitions. [2019-11-07 00:39:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 00:39:32,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:32,726 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 00:39:32,726 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:32,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1663081949, now seen corresponding path program 1 times [2019-11-07 00:39:32,727 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:32,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584573380] [2019-11-07 00:39:32,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:32,854 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 00:39:32,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584573380] [2019-11-07 00:39:32,854 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:32,855 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:32,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390411526] [2019-11-07 00:39:32,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:32,856 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:32,856 INFO L87 Difference]: Start difference. First operand 614 states and 939 transitions. Second operand 6 states. [2019-11-07 00:39:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,031 INFO L93 Difference]: Finished difference Result 1182 states and 1828 transitions. [2019-11-07 00:39:33,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:33,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-11-07 00:39:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,039 INFO L225 Difference]: With dead ends: 1182 [2019-11-07 00:39:33,039 INFO L226 Difference]: Without dead ends: 614 [2019-11-07 00:39:33,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-11-07 00:39:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-11-07 00:39:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-11-07 00:39:33,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 938 transitions. [2019-11-07 00:39:33,073 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 938 transitions. Word has length 96 [2019-11-07 00:39:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,074 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 938 transitions. [2019-11-07 00:39:33,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 938 transitions. [2019-11-07 00:39:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-07 00:39:33,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,077 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 00:39:33,077 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,078 INFO L82 PathProgramCache]: Analyzing trace with hash -943838304, now seen corresponding path program 1 times [2019-11-07 00:39:33,078 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494524095] [2019-11-07 00:39:33,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,248 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 00:39:33,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494524095] [2019-11-07 00:39:33,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:33,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274278867] [2019-11-07 00:39:33,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:33,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:33,251 INFO L87 Difference]: Start difference. First operand 614 states and 938 transitions. Second operand 6 states. [2019-11-07 00:39:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:33,419 INFO L93 Difference]: Finished difference Result 1182 states and 1827 transitions. [2019-11-07 00:39:33,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:33,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-11-07 00:39:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:33,426 INFO L225 Difference]: With dead ends: 1182 [2019-11-07 00:39:33,426 INFO L226 Difference]: Without dead ends: 614 [2019-11-07 00:39:33,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-11-07 00:39:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2019-11-07 00:39:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-11-07 00:39:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 937 transitions. [2019-11-07 00:39:33,452 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 937 transitions. Word has length 97 [2019-11-07 00:39:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:33,452 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 937 transitions. [2019-11-07 00:39:33,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 937 transitions. [2019-11-07 00:39:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-07 00:39:33,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:33,455 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 00:39:33,455 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1191719486, now seen corresponding path program 1 times [2019-11-07 00:39:33,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:33,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535058614] [2019-11-07 00:39:33,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:33,702 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 00:39:33,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535058614] [2019-11-07 00:39:33,703 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:33,703 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:33,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103699813] [2019-11-07 00:39:33,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:33,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:33,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:33,706 INFO L87 Difference]: Start difference. First operand 614 states and 937 transitions. Second operand 12 states. [2019-11-07 00:39:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,039 INFO L93 Difference]: Finished difference Result 1188 states and 1837 transitions. [2019-11-07 00:39:34,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:34,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2019-11-07 00:39:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,046 INFO L225 Difference]: With dead ends: 1188 [2019-11-07 00:39:34,046 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:39:34,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:39:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 619. [2019-11-07 00:39:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-11-07 00:39:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 943 transitions. [2019-11-07 00:39:34,073 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 943 transitions. Word has length 98 [2019-11-07 00:39:34,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,073 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 943 transitions. [2019-11-07 00:39:34,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 943 transitions. [2019-11-07 00:39:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 00:39:34,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,075 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 00:39:34,076 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1942578085, now seen corresponding path program 1 times [2019-11-07 00:39:34,076 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,076 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813588062] [2019-11-07 00:39:34,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,201 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 00:39:34,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813588062] [2019-11-07 00:39:34,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:34,202 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:39:34,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397520018] [2019-11-07 00:39:34,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:34,203 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:39:34,204 INFO L87 Difference]: Start difference. First operand 619 states and 943 transitions. Second operand 3 states. [2019-11-07 00:39:34,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:34,414 INFO L93 Difference]: Finished difference Result 1747 states and 2726 transitions. [2019-11-07 00:39:34,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:34,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-11-07 00:39:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:34,426 INFO L225 Difference]: With dead ends: 1747 [2019-11-07 00:39:34,426 INFO L226 Difference]: Without dead ends: 1181 [2019-11-07 00:39:34,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:39:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2019-11-07 00:39:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1111. [2019-11-07 00:39:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2019-11-07 00:39:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1724 transitions. [2019-11-07 00:39:34,494 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1724 transitions. Word has length 99 [2019-11-07 00:39:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:34,494 INFO L462 AbstractCegarLoop]: Abstraction has 1111 states and 1724 transitions. [2019-11-07 00:39:34,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1724 transitions. [2019-11-07 00:39:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 00:39:34,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,502 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:34,502 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 821563057, now seen corresponding path program 1 times [2019-11-07 00:39:34,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538670214] [2019-11-07 00:39:34,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 00:39:34,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538670214] [2019-11-07 00:39:34,752 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316979984] [2019-11-07 00:39:34,752 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 00:39:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:39:35,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 00:39:35,554 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 00:39:35,746 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:35,746 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:35,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865345904] [2019-11-07 00:39:35,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:35,748 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:35,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:35,748 INFO L87 Difference]: Start difference. First operand 1111 states and 1724 transitions. Second operand 3 states. [2019-11-07 00:39:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,914 INFO L93 Difference]: Finished difference Result 3215 states and 5106 transitions. [2019-11-07 00:39:35,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:35,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2019-11-07 00:39:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,933 INFO L225 Difference]: With dead ends: 3215 [2019-11-07 00:39:35,933 INFO L226 Difference]: Without dead ends: 2158 [2019-11-07 00:39:35,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2019-11-07 00:39:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2145. [2019-11-07 00:39:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2145 states. [2019-11-07 00:39:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 3380 transitions. [2019-11-07 00:39:36,115 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 3380 transitions. Word has length 157 [2019-11-07 00:39:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,116 INFO L462 AbstractCegarLoop]: Abstraction has 2145 states and 3380 transitions. [2019-11-07 00:39:36,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 3380 transitions. [2019-11-07 00:39:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 00:39:36,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,127 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:36,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:36,346 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,347 INFO L82 PathProgramCache]: Analyzing trace with hash -486583633, now seen corresponding path program 1 times [2019-11-07 00:39:36,347 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473862192] [2019-11-07 00:39:36,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:39:36,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473862192] [2019-11-07 00:39:36,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007223640] [2019-11-07 00:39:36,715 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 00:39:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:37,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:37,506 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:38,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:38,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-11-07 00:39:38,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296322350] [2019-11-07 00:39:38,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:38,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:38,088 INFO L87 Difference]: Start difference. First operand 2145 states and 3380 transitions. Second operand 5 states. [2019-11-07 00:39:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:39,253 INFO L93 Difference]: Finished difference Result 4269 states and 6918 transitions. [2019-11-07 00:39:39,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:39,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2019-11-07 00:39:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:39,279 INFO L225 Difference]: With dead ends: 4269 [2019-11-07 00:39:39,279 INFO L226 Difference]: Without dead ends: 2177 [2019-11-07 00:39:39,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 316 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:39:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2019-11-07 00:39:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 2177. [2019-11-07 00:39:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2177 states. [2019-11-07 00:39:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3432 transitions. [2019-11-07 00:39:39,435 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3432 transitions. Word has length 158 [2019-11-07 00:39:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:39,436 INFO L462 AbstractCegarLoop]: Abstraction has 2177 states and 3432 transitions. [2019-11-07 00:39:39,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3432 transitions. [2019-11-07 00:39:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 00:39:39,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:39,445 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:39,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:39,663 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash 273754146, now seen corresponding path program 1 times [2019-11-07 00:39:39,664 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:39,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598865161] [2019-11-07 00:39:39,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:39:39,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598865161] [2019-11-07 00:39:39,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337737380] [2019-11-07 00:39:39,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:40,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:40,890 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 00:39:41,313 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:41,313 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:41,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719863178] [2019-11-07 00:39:41,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:41,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:41,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:41,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:41,315 INFO L87 Difference]: Start difference. First operand 2177 states and 3432 transitions. Second operand 5 states. [2019-11-07 00:39:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:42,335 INFO L93 Difference]: Finished difference Result 4333 states and 7010 transitions. [2019-11-07 00:39:42,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:42,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-07 00:39:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:42,353 INFO L225 Difference]: With dead ends: 4333 [2019-11-07 00:39:42,354 INFO L226 Difference]: Without dead ends: 2209 [2019-11-07 00:39:42,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2019-11-07 00:39:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2209. [2019-11-07 00:39:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2019-11-07 00:39:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3484 transitions. [2019-11-07 00:39:42,470 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3484 transitions. Word has length 161 [2019-11-07 00:39:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:42,473 INFO L462 AbstractCegarLoop]: Abstraction has 2209 states and 3484 transitions. [2019-11-07 00:39:42,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3484 transitions. [2019-11-07 00:39:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-07 00:39:42,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:42,479 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:42,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:42,687 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash 784870611, now seen corresponding path program 1 times [2019-11-07 00:39:42,688 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:42,688 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257868586] [2019-11-07 00:39:42,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-07 00:39:42,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257868586] [2019-11-07 00:39:42,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376816201] [2019-11-07 00:39:42,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:43,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-07 00:39:43,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 00:39:43,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-07 00:39:44,152 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:44,153 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 6] total 15 [2019-11-07 00:39:44,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065272050] [2019-11-07 00:39:44,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:44,155 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:39:44,156 INFO L87 Difference]: Start difference. First operand 2209 states and 3484 transitions. Second operand 6 states. [2019-11-07 00:39:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:45,143 INFO L93 Difference]: Finished difference Result 5746 states and 9066 transitions. [2019-11-07 00:39:45,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:45,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-11-07 00:39:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:45,171 INFO L225 Difference]: With dead ends: 5746 [2019-11-07 00:39:45,172 INFO L226 Difference]: Without dead ends: 3590 [2019-11-07 00:39:45,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 318 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2019-11-07 00:39:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3587. [2019-11-07 00:39:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3587 states. [2019-11-07 00:39:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 5594 transitions. [2019-11-07 00:39:45,341 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 5594 transitions. Word has length 163 [2019-11-07 00:39:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:45,341 INFO L462 AbstractCegarLoop]: Abstraction has 3587 states and 5594 transitions. [2019-11-07 00:39:45,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 5594 transitions. [2019-11-07 00:39:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:45,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:45,353 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:45,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:45,571 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash 708817297, now seen corresponding path program 1 times [2019-11-07 00:39:45,572 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:45,572 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610804129] [2019-11-07 00:39:45,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 00:39:45,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610804129] [2019-11-07 00:39:45,784 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550771226] [2019-11-07 00:39:45,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:46,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 2896 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:46,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:46,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 00:39:47,100 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:47,100 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-11-07 00:39:47,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085124049] [2019-11-07 00:39:47,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:47,101 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:47,102 INFO L87 Difference]: Start difference. First operand 3587 states and 5594 transitions. Second operand 5 states. [2019-11-07 00:39:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:48,108 INFO L93 Difference]: Finished difference Result 7185 states and 11568 transitions. [2019-11-07 00:39:48,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:48,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2019-11-07 00:39:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:48,134 INFO L225 Difference]: With dead ends: 7185 [2019-11-07 00:39:48,134 INFO L226 Difference]: Without dead ends: 3651 [2019-11-07 00:39:48,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 328 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-07 00:39:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2019-11-07 00:39:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3651. [2019-11-07 00:39:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3651 states. [2019-11-07 00:39:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 5698 transitions. [2019-11-07 00:39:48,295 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 5698 transitions. Word has length 164 [2019-11-07 00:39:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:48,295 INFO L462 AbstractCegarLoop]: Abstraction has 3651 states and 5698 transitions. [2019-11-07 00:39:48,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 5698 transitions. [2019-11-07 00:39:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 00:39:48,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:48,303 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:48,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:48,511 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash -468034244, now seen corresponding path program 1 times [2019-11-07 00:39:48,512 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:48,512 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711689319] [2019-11-07 00:39:48,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:48,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711689319] [2019-11-07 00:39:48,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867265635] [2019-11-07 00:39:48,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:49,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:49,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:49,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 00:39:50,024 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:50,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 17 [2019-11-07 00:39:50,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509583576] [2019-11-07 00:39:50,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:50,025 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:50,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:50,026 INFO L87 Difference]: Start difference. First operand 3651 states and 5698 transitions. Second operand 5 states. [2019-11-07 00:39:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:51,174 INFO L93 Difference]: Finished difference Result 7313 states and 11752 transitions. [2019-11-07 00:39:51,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:51,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2019-11-07 00:39:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:51,198 INFO L225 Difference]: With dead ends: 7313 [2019-11-07 00:39:51,199 INFO L226 Difference]: Without dead ends: 3715 [2019-11-07 00:39:51,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 334 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-07 00:39:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2019-11-07 00:39:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3715. [2019-11-07 00:39:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3715 states. [2019-11-07 00:39:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 5802 transitions. [2019-11-07 00:39:51,405 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 5802 transitions. Word has length 167 [2019-11-07 00:39:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:51,405 INFO L462 AbstractCegarLoop]: Abstraction has 3715 states and 5802 transitions. [2019-11-07 00:39:51,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 5802 transitions. [2019-11-07 00:39:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 00:39:51,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:51,412 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:51,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:51,619 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:51,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1184193077, now seen corresponding path program 1 times [2019-11-07 00:39:51,620 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:51,621 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134476754] [2019-11-07 00:39:51,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-07 00:39:51,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134476754] [2019-11-07 00:39:51,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967340305] [2019-11-07 00:39:51,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:52,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-07 00:39:52,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:39:52,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-07 00:39:52,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:52,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [11] total 17 [2019-11-07 00:39:52,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709139563] [2019-11-07 00:39:52,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:39:52,789 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:39:52,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:52,790 INFO L87 Difference]: Start difference. First operand 3715 states and 5802 transitions. Second operand 8 states.