java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec2_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:11:06,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:11:06,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:11:06,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:11:06,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:11:06,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:11:06,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:11:06,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:11:06,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:11:06,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:11:06,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:11:06,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:11:06,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:11:06,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:11:06,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:11:06,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:11:06,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:11:06,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:11:06,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:11:06,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:11:06,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:11:06,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:11:06,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:11:06,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:11:06,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:11:06,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:11:06,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:11:06,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:11:06,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:11:06,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:11:06,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:11:06,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:11:06,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:11:06,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:11:06,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:11:06,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:11:06,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:11:06,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:11:06,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:11:06,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:11:06,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:11:06,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:11:06,413 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:11:06,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:11:06,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:11:06,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:11:06,415 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:11:06,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:11:06,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:11:06,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:11:06,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:11:06,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:11:06,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:11:06,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:11:06,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:11:06,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:11:06,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:11:06,419 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:11:06,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:11:06,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:11:06,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:11:06,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:11:06,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:11:06,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:06,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:11:06,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:11:06,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:11:06,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:11:06,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:11:06,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:11:06,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:11:06,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:11:06,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:11:06,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:11:06,760 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:11:06,760 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:11:06,761 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec2_product31.cil.c [2019-10-13 21:11:06,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676ee779c/8477610002a441bba7ba18036ea4080b/FLAG72055aee8 [2019-10-13 21:11:07,424 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:11:07,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec2_product31.cil.c [2019-10-13 21:11:07,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676ee779c/8477610002a441bba7ba18036ea4080b/FLAG72055aee8 [2019-10-13 21:11:07,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676ee779c/8477610002a441bba7ba18036ea4080b [2019-10-13 21:11:07,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:11:07,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:11:07,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:07,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:11:07,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:11:07,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:07" (1/1) ... [2019-10-13 21:11:07,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74752006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:07, skipping insertion in model container [2019-10-13 21:11:07,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:11:07" (1/1) ... [2019-10-13 21:11:07,702 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:11:07,782 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:11:08,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:08,553 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:11:08,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:11:08,789 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:11:08,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08 WrapperNode [2019-10-13 21:11:08,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:11:08,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:11:08,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:11:08,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:11:08,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... [2019-10-13 21:11:08,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:11:09,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:11:09,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:11:09,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:11:09,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:11:09,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:11:09,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:11:09,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:09,085 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:11:09,085 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:11:09,086 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:11:09,086 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:11:09,086 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:11:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:11:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:11:09,087 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:11:09,088 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:11:09,088 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:11:09,089 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:11:09,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:11:09,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:11:09,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:11:09,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:11:09,092 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:11:09,093 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:11:09,093 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:11:09,094 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:11:09,094 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:11:09,095 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:11:09,095 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:11:09,095 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:11:09,095 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:11:09,096 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:11:09,096 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:11:09,096 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:11:09,096 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:11:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:11:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:11:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:11:09,097 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:11:09,098 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:11:09,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:11:09,099 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:11:09,099 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:11:09,099 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:11:09,099 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-10-13 21:11:09,100 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:11:09,100 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-10-13 21:11:09,100 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-10-13 21:11:09,101 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:11:09,101 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:11:09,101 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:11:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:11:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:11:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:11:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:11:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:11:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:11:09,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:11:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:11:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:11:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:11:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:11:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:11:09,104 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:11:09,105 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:11:09,105 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:09,105 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:11:09,106 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:11:09,106 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:11:09,106 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:11:09,106 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:11:09,106 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-10-13 21:11:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-10-13 21:11:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:11:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:11:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:11:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:11:09,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:11:09,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:09,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:09,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:09,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:11:09,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:11:09,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:11:09,110 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:11:09,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:11:09,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:11:09,111 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:11:09,112 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:11:09,112 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:11:09,112 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:11:09,113 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:11:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:11:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:11:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:11:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:11:09,114 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:11:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:11:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:11:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:11:09,115 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:11:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-10-13 21:11:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-10-13 21:11:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2019-10-13 21:11:09,116 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2019-10-13 21:11:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:11:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:11:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:11:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:11:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:11:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:11:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:11:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:11:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:11:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:11:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:11:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:11:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:11:09,119 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:11:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:11:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:11:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:11:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:11:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:11:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:11:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:11:09,122 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:11:09,122 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:11:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:11:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:11:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:11:09,123 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:11:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:11:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:11:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:11:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:11:09,124 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:11:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:11:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:11:09,125 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:11:09,126 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-10-13 21:11:09,130 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-10-13 21:11:09,130 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-10-13 21:11:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-10-13 21:11:09,131 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-10-13 21:11:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:11:09,132 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:11:09,133 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:11:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:11:09,139 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:11:09,139 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-10-13 21:11:09,139 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-10-13 21:11:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:11:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:11:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-10-13 21:11:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-10-13 21:11:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:11:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:11:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:11:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:11:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:11:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:11:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:11:09,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:11:09,143 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:11:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:11:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:11:09,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:11:11,639 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:11:11,640 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:11:11,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:11 BoogieIcfgContainer [2019-10-13 21:11:11,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:11:11,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:11:11,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:11:11,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:11:11,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:11:07" (1/3) ... [2019-10-13 21:11:11,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7851394b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:11, skipping insertion in model container [2019-10-13 21:11:11,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:11:08" (2/3) ... [2019-10-13 21:11:11,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7851394b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:11:11, skipping insertion in model container [2019-10-13 21:11:11,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:11:11" (3/3) ... [2019-10-13 21:11:11,651 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2019-10-13 21:11:11,662 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:11:11,673 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:11:11,685 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:11:11,731 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:11:11,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:11:11,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:11:11,732 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:11:11,732 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:11:11,732 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:11:11,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:11:11,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:11:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2019-10-13 21:11:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 21:11:11,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:11,818 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:11,820 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:11,826 INFO L82 PathProgramCache]: Analyzing trace with hash 841338012, now seen corresponding path program 1 times [2019-10-13 21:11:11,833 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:11,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730892645] [2019-10-13 21:11:11,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:11,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:11,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:12,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730892645] [2019-10-13 21:11:12,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:12,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:12,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302027713] [2019-10-13 21:11:12,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:12,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:12,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:12,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:12,537 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 4 states. [2019-10-13 21:11:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:12,787 INFO L93 Difference]: Finished difference Result 1297 states and 2075 transitions. [2019-10-13 21:11:12,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:12,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2019-10-13 21:11:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:12,830 INFO L225 Difference]: With dead ends: 1297 [2019-10-13 21:11:12,830 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:11:12,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:11:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:11:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:11:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1039 transitions. [2019-10-13 21:11:12,963 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1039 transitions. Word has length 133 [2019-10-13 21:11:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:12,964 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1039 transitions. [2019-10-13 21:11:12,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1039 transitions. [2019-10-13 21:11:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 21:11:12,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:12,975 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:12,975 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:12,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1822294424, now seen corresponding path program 1 times [2019-10-13 21:11:12,976 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:12,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684904649] [2019-10-13 21:11:12,976 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:12,976 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:12,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:13,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684904649] [2019-10-13 21:11:13,214 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:13,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:13,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862260823] [2019-10-13 21:11:13,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:13,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:13,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:13,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:13,218 INFO L87 Difference]: Start difference. First operand 657 states and 1039 transitions. Second operand 4 states. [2019-10-13 21:11:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:13,363 INFO L93 Difference]: Finished difference Result 1277 states and 2036 transitions. [2019-10-13 21:11:13,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:13,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-10-13 21:11:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:13,371 INFO L225 Difference]: With dead ends: 1277 [2019-10-13 21:11:13,372 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:11:13,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:11:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:11:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:11:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1038 transitions. [2019-10-13 21:11:13,418 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1038 transitions. Word has length 136 [2019-10-13 21:11:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:13,418 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1038 transitions. [2019-10-13 21:11:13,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1038 transitions. [2019-10-13 21:11:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:11:13,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:13,425 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:13,425 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -122460853, now seen corresponding path program 1 times [2019-10-13 21:11:13,426 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:13,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785631119] [2019-10-13 21:11:13,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:13,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:13,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:13,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785631119] [2019-10-13 21:11:13,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:13,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:13,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077128696] [2019-10-13 21:11:13,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:13,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:13,607 INFO L87 Difference]: Start difference. First operand 657 states and 1038 transitions. Second operand 4 states. [2019-10-13 21:11:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:13,674 INFO L93 Difference]: Finished difference Result 1277 states and 2035 transitions. [2019-10-13 21:11:13,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:13,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 21:11:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:13,680 INFO L225 Difference]: With dead ends: 1277 [2019-10-13 21:11:13,680 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:11:13,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:11:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:11:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:11:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1037 transitions. [2019-10-13 21:11:13,716 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1037 transitions. Word has length 137 [2019-10-13 21:11:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:13,716 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1037 transitions. [2019-10-13 21:11:13,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1037 transitions. [2019-10-13 21:11:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:11:13,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:13,723 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:13,723 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:13,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1796711564, now seen corresponding path program 1 times [2019-10-13 21:11:13,724 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:13,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611006782] [2019-10-13 21:11:13,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:13,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:13,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:13,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611006782] [2019-10-13 21:11:13,855 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:13,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:13,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276223223] [2019-10-13 21:11:13,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:13,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:13,858 INFO L87 Difference]: Start difference. First operand 657 states and 1037 transitions. Second operand 4 states. [2019-10-13 21:11:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:13,931 INFO L93 Difference]: Finished difference Result 1277 states and 2034 transitions. [2019-10-13 21:11:13,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:13,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-13 21:11:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:13,946 INFO L225 Difference]: With dead ends: 1277 [2019-10-13 21:11:13,946 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:11:13,952 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:11:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:11:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:11:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1036 transitions. [2019-10-13 21:11:13,997 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1036 transitions. Word has length 138 [2019-10-13 21:11:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:13,998 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1036 transitions. [2019-10-13 21:11:13,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1036 transitions. [2019-10-13 21:11:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 21:11:14,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:14,005 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:14,005 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 619711975, now seen corresponding path program 1 times [2019-10-13 21:11:14,006 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:14,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495947209] [2019-10-13 21:11:14,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:14,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495947209] [2019-10-13 21:11:14,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:14,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:14,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813503984] [2019-10-13 21:11:14,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:14,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:14,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:14,186 INFO L87 Difference]: Start difference. First operand 657 states and 1036 transitions. Second operand 4 states. [2019-10-13 21:11:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:14,254 INFO L93 Difference]: Finished difference Result 1277 states and 2033 transitions. [2019-10-13 21:11:14,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:14,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-13 21:11:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:14,266 INFO L225 Difference]: With dead ends: 1277 [2019-10-13 21:11:14,267 INFO L226 Difference]: Without dead ends: 657 [2019-10-13 21:11:14,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2019-10-13 21:11:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2019-10-13 21:11:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2019-10-13 21:11:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1035 transitions. [2019-10-13 21:11:14,305 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1035 transitions. Word has length 139 [2019-10-13 21:11:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:14,306 INFO L462 AbstractCegarLoop]: Abstraction has 657 states and 1035 transitions. [2019-10-13 21:11:14,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1035 transitions. [2019-10-13 21:11:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:11:14,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:14,311 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:14,315 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:14,315 INFO L82 PathProgramCache]: Analyzing trace with hash 998018384, now seen corresponding path program 1 times [2019-10-13 21:11:14,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:14,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741750232] [2019-10-13 21:11:14,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,317 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:14,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741750232] [2019-10-13 21:11:14,549 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:14,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 21:11:14,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035343445] [2019-10-13 21:11:14,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:11:14,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:11:14,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:11:14,552 INFO L87 Difference]: Start difference. First operand 657 states and 1035 transitions. Second operand 10 states. [2019-10-13 21:11:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:14,799 INFO L93 Difference]: Finished difference Result 1235 states and 1953 transitions. [2019-10-13 21:11:14,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:11:14,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-10-13 21:11:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:14,805 INFO L225 Difference]: With dead ends: 1235 [2019-10-13 21:11:14,806 INFO L226 Difference]: Without dead ends: 666 [2019-10-13 21:11:14,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:11:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2019-10-13 21:11:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 664. [2019-10-13 21:11:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2019-10-13 21:11:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1044 transitions. [2019-10-13 21:11:14,849 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1044 transitions. Word has length 140 [2019-10-13 21:11:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:14,851 INFO L462 AbstractCegarLoop]: Abstraction has 664 states and 1044 transitions. [2019-10-13 21:11:14,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:11:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1044 transitions. [2019-10-13 21:11:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:11:14,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:14,860 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:14,861 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1692665391, now seen corresponding path program 1 times [2019-10-13 21:11:14,861 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:14,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714925119] [2019-10-13 21:11:14,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:14,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:15,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714925119] [2019-10-13 21:11:15,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:15,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:11:15,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736361587] [2019-10-13 21:11:15,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:11:15,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:11:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:11:15,081 INFO L87 Difference]: Start difference. First operand 664 states and 1044 transitions. Second operand 4 states. [2019-10-13 21:11:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:15,143 INFO L93 Difference]: Finished difference Result 1283 states and 2039 transitions. [2019-10-13 21:11:15,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:11:15,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:11:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:15,152 INFO L225 Difference]: With dead ends: 1283 [2019-10-13 21:11:15,153 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:11:15,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:11:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:11:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:11:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:11:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1021 transitions. [2019-10-13 21:11:15,182 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1021 transitions. Word has length 140 [2019-10-13 21:11:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:15,183 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1021 transitions. [2019-10-13 21:11:15,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:11:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1021 transitions. [2019-10-13 21:11:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 21:11:15,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:15,189 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:15,189 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:15,189 INFO L82 PathProgramCache]: Analyzing trace with hash 677141201, now seen corresponding path program 1 times [2019-10-13 21:11:15,190 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:15,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908289123] [2019-10-13 21:11:15,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:15,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908289123] [2019-10-13 21:11:15,341 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:15,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:15,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746998470] [2019-10-13 21:11:15,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:15,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:15,343 INFO L87 Difference]: Start difference. First operand 651 states and 1021 transitions. Second operand 6 states. [2019-10-13 21:11:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:15,558 INFO L93 Difference]: Finished difference Result 1223 states and 1931 transitions. [2019-10-13 21:11:15,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:15,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-13 21:11:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:15,564 INFO L225 Difference]: With dead ends: 1223 [2019-10-13 21:11:15,564 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:11:15,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:11:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:11:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:11:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1017 transitions. [2019-10-13 21:11:15,594 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1017 transitions. Word has length 141 [2019-10-13 21:11:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:15,595 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1017 transitions. [2019-10-13 21:11:15,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1017 transitions. [2019-10-13 21:11:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:11:15,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:15,600 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:15,600 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1320232493, now seen corresponding path program 1 times [2019-10-13 21:11:15,601 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:15,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475190859] [2019-10-13 21:11:15,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:15,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:15,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475190859] [2019-10-13 21:11:15,745 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:15,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:15,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71908466] [2019-10-13 21:11:15,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:15,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:15,747 INFO L87 Difference]: Start difference. First operand 651 states and 1017 transitions. Second operand 6 states. [2019-10-13 21:11:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:15,975 INFO L93 Difference]: Finished difference Result 1223 states and 1927 transitions. [2019-10-13 21:11:15,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:15,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-13 21:11:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:15,981 INFO L225 Difference]: With dead ends: 1223 [2019-10-13 21:11:15,982 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:11:15,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:11:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:11:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:11:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1013 transitions. [2019-10-13 21:11:16,008 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1013 transitions. Word has length 142 [2019-10-13 21:11:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,008 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1013 transitions. [2019-10-13 21:11:16,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1013 transitions. [2019-10-13 21:11:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:11:16,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,013 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,014 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,014 INFO L82 PathProgramCache]: Analyzing trace with hash 893402902, now seen corresponding path program 1 times [2019-10-13 21:11:16,014 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989266148] [2019-10-13 21:11:16,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:16,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989266148] [2019-10-13 21:11:16,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:16,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:16,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920491545] [2019-10-13 21:11:16,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:16,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:16,145 INFO L87 Difference]: Start difference. First operand 651 states and 1013 transitions. Second operand 6 states. [2019-10-13 21:11:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,328 INFO L93 Difference]: Finished difference Result 1223 states and 1923 transitions. [2019-10-13 21:11:16,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:16,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-13 21:11:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,334 INFO L225 Difference]: With dead ends: 1223 [2019-10-13 21:11:16,334 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:11:16,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:11:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:11:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:11:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1009 transitions. [2019-10-13 21:11:16,361 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1009 transitions. Word has length 143 [2019-10-13 21:11:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,361 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1009 transitions. [2019-10-13 21:11:16,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1009 transitions. [2019-10-13 21:11:16,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 21:11:16,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,366 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,367 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1947876246, now seen corresponding path program 1 times [2019-10-13 21:11:16,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480779375] [2019-10-13 21:11:16,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:16,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480779375] [2019-10-13 21:11:16,501 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:16,501 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:11:16,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188088146] [2019-10-13 21:11:16,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:11:16,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:16,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:11:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:11:16,502 INFO L87 Difference]: Start difference. First operand 651 states and 1009 transitions. Second operand 7 states. [2019-10-13 21:11:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,578 INFO L93 Difference]: Finished difference Result 1223 states and 1919 transitions. [2019-10-13 21:11:16,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:16,579 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-10-13 21:11:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,584 INFO L225 Difference]: With dead ends: 1223 [2019-10-13 21:11:16,584 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 21:11:16,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 21:11:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2019-10-13 21:11:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-10-13 21:11:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 975 transitions. [2019-10-13 21:11:16,609 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 975 transitions. Word has length 143 [2019-10-13 21:11:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,610 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 975 transitions. [2019-10-13 21:11:16,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:11:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 975 transitions. [2019-10-13 21:11:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:11:16,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,615 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,616 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,616 INFO L82 PathProgramCache]: Analyzing trace with hash 504333880, now seen corresponding path program 1 times [2019-10-13 21:11:16,616 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116989254] [2019-10-13 21:11:16,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:16,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116989254] [2019-10-13 21:11:16,783 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:16,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:16,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635368792] [2019-10-13 21:11:16,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:16,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:16,785 INFO L87 Difference]: Start difference. First operand 630 states and 975 transitions. Second operand 6 states. [2019-10-13 21:11:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:16,878 INFO L93 Difference]: Finished difference Result 1202 states and 1885 transitions. [2019-10-13 21:11:16,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:16,879 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-13 21:11:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:16,883 INFO L225 Difference]: With dead ends: 1202 [2019-10-13 21:11:16,884 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 21:11:16,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 21:11:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2019-10-13 21:11:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-10-13 21:11:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 974 transitions. [2019-10-13 21:11:16,911 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 974 transitions. Word has length 144 [2019-10-13 21:11:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:16,913 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 974 transitions. [2019-10-13 21:11:16,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 974 transitions. [2019-10-13 21:11:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:11:16,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:16,918 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:16,918 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1035806555, now seen corresponding path program 1 times [2019-10-13 21:11:16,919 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:16,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744915887] [2019-10-13 21:11:16,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:16,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:17,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744915887] [2019-10-13 21:11:17,047 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:17,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:17,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850956179] [2019-10-13 21:11:17,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:17,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:17,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:17,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:17,050 INFO L87 Difference]: Start difference. First operand 630 states and 974 transitions. Second operand 6 states. [2019-10-13 21:11:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:17,140 INFO L93 Difference]: Finished difference Result 1202 states and 1884 transitions. [2019-10-13 21:11:17,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:17,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-13 21:11:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:17,145 INFO L225 Difference]: With dead ends: 1202 [2019-10-13 21:11:17,145 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 21:11:17,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:11:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 21:11:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2019-10-13 21:11:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-10-13 21:11:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 973 transitions. [2019-10-13 21:11:17,181 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 973 transitions. Word has length 145 [2019-10-13 21:11:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:17,182 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 973 transitions. [2019-10-13 21:11:17,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 973 transitions. [2019-10-13 21:11:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:11:17,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:17,186 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:17,187 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:17,187 INFO L82 PathProgramCache]: Analyzing trace with hash 39300765, now seen corresponding path program 1 times [2019-10-13 21:11:17,187 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:17,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005689060] [2019-10-13 21:11:17,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 21:11:17,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005689060] [2019-10-13 21:11:17,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:17,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 21:11:17,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282633409] [2019-10-13 21:11:17,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 21:11:17,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:17,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 21:11:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:17,391 INFO L87 Difference]: Start difference. First operand 630 states and 973 transitions. Second operand 12 states. [2019-10-13 21:11:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:17,608 INFO L93 Difference]: Finished difference Result 1203 states and 1883 transitions. [2019-10-13 21:11:17,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:11:17,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-10-13 21:11:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:17,613 INFO L225 Difference]: With dead ends: 1203 [2019-10-13 21:11:17,613 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 21:11:17,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 21:11:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2019-10-13 21:11:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2019-10-13 21:11:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 972 transitions. [2019-10-13 21:11:17,639 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 972 transitions. Word has length 146 [2019-10-13 21:11:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:17,639 INFO L462 AbstractCegarLoop]: Abstraction has 630 states and 972 transitions. [2019-10-13 21:11:17,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 21:11:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 972 transitions. [2019-10-13 21:11:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:11:17,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:17,645 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:17,645 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash -733497836, now seen corresponding path program 1 times [2019-10-13 21:11:17,646 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:17,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831563359] [2019-10-13 21:11:17,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,647 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:17,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 21:11:17,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831563359] [2019-10-13 21:11:17,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876907699] [2019-10-13 21:11:17,900 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 [2019-10-13 21:11:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:18,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 2771 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:18,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:18,634 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:19,432 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:19,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-10-13 21:11:19,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972665264] [2019-10-13 21:11:19,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:19,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:19,434 INFO L87 Difference]: Start difference. First operand 630 states and 972 transitions. Second operand 5 states. [2019-10-13 21:11:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:20,302 INFO L93 Difference]: Finished difference Result 1202 states and 1911 transitions. [2019-10-13 21:11:20,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:20,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-13 21:11:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:20,310 INFO L225 Difference]: With dead ends: 1202 [2019-10-13 21:11:20,312 INFO L226 Difference]: Without dead ends: 638 [2019-10-13 21:11:20,320 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 293 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:11:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-13 21:11:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 638. [2019-10-13 21:11:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2019-10-13 21:11:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 985 transitions. [2019-10-13 21:11:20,351 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 985 transitions. Word has length 147 [2019-10-13 21:11:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:20,351 INFO L462 AbstractCegarLoop]: Abstraction has 638 states and 985 transitions. [2019-10-13 21:11:20,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 985 transitions. [2019-10-13 21:11:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:11:20,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:20,356 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:20,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:20,565 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1966079276, now seen corresponding path program 1 times [2019-10-13 21:11:20,566 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:20,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463273797] [2019-10-13 21:11:20,566 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:20,566 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:20,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:20,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463273797] [2019-10-13 21:11:20,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:11:20,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:11:20,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491906189] [2019-10-13 21:11:20,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:11:20,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:11:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:11:20,764 INFO L87 Difference]: Start difference. First operand 638 states and 985 transitions. Second operand 6 states. [2019-10-13 21:11:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:21,487 INFO L93 Difference]: Finished difference Result 1217 states and 1935 transitions. [2019-10-13 21:11:21,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:21,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-13 21:11:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:21,493 INFO L225 Difference]: With dead ends: 1217 [2019-10-13 21:11:21,493 INFO L226 Difference]: Without dead ends: 643 [2019-10-13 21:11:21,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:11:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-10-13 21:11:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2019-10-13 21:11:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2019-10-13 21:11:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 989 transitions. [2019-10-13 21:11:21,529 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 989 transitions. Word has length 149 [2019-10-13 21:11:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:21,530 INFO L462 AbstractCegarLoop]: Abstraction has 643 states and 989 transitions. [2019-10-13 21:11:21,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:11:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 989 transitions. [2019-10-13 21:11:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 21:11:21,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:21,535 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:21,535 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1163052, now seen corresponding path program 1 times [2019-10-13 21:11:21,536 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:21,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570677064] [2019-10-13 21:11:21,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:21,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:21,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:11:21,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570677064] [2019-10-13 21:11:21,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533467826] [2019-10-13 21:11:21,778 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 [2019-10-13 21:11:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:22,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 2775 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:22,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:22,502 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:23,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:23,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 18 [2019-10-13 21:11:23,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198213188] [2019-10-13 21:11:23,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:23,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:23,175 INFO L87 Difference]: Start difference. First operand 643 states and 989 transitions. Second operand 5 states. [2019-10-13 21:11:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:24,125 INFO L93 Difference]: Finished difference Result 1228 states and 1939 transitions. [2019-10-13 21:11:24,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:24,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2019-10-13 21:11:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:24,131 INFO L225 Difference]: With dead ends: 1228 [2019-10-13 21:11:24,131 INFO L226 Difference]: Without dead ends: 651 [2019-10-13 21:11:24,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 301 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-10-13 21:11:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-13 21:11:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2019-10-13 21:11:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-13 21:11:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1002 transitions. [2019-10-13 21:11:24,158 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1002 transitions. Word has length 151 [2019-10-13 21:11:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:24,159 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 1002 transitions. [2019-10-13 21:11:24,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1002 transitions. [2019-10-13 21:11:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 21:11:24,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:24,164 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:24,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:24,379 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1998068, now seen corresponding path program 1 times [2019-10-13 21:11:24,380 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:24,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704515800] [2019-10-13 21:11:24,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:24,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:24,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:11:24,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704515800] [2019-10-13 21:11:24,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922931311] [2019-10-13 21:11:24,561 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 [2019-10-13 21:11:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:25,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 2777 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:25,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:25,240 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:11:26,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:11:26,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 6] total 17 [2019-10-13 21:11:26,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736975462] [2019-10-13 21:11:26,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:26,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:26,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:11:26,006 INFO L87 Difference]: Start difference. First operand 651 states and 1002 transitions. Second operand 5 states. [2019-10-13 21:11:26,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:26,805 INFO L93 Difference]: Finished difference Result 1244 states and 1962 transitions. [2019-10-13 21:11:26,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:26,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-10-13 21:11:26,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:26,811 INFO L225 Difference]: With dead ends: 1244 [2019-10-13 21:11:26,812 INFO L226 Difference]: Without dead ends: 659 [2019-10-13 21:11:26,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 305 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-10-13 21:11:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2019-10-13 21:11:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2019-10-13 21:11:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1015 transitions. [2019-10-13 21:11:26,838 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1015 transitions. Word has length 153 [2019-10-13 21:11:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:26,839 INFO L462 AbstractCegarLoop]: Abstraction has 659 states and 1015 transitions. [2019-10-13 21:11:26,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1015 transitions. [2019-10-13 21:11:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:11:26,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:26,844 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:27,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:27,059 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:27,060 INFO L82 PathProgramCache]: Analyzing trace with hash -46315116, now seen corresponding path program 1 times [2019-10-13 21:11:27,060 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:27,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478737794] [2019-10-13 21:11:27,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:27,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:27,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:11:27,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478737794] [2019-10-13 21:11:27,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137793481] [2019-10-13 21:11:27,290 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 [2019-10-13 21:11:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:27,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:11:27,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:27,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:28,297 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:28,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [11] total 18 [2019-10-13 21:11:28,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108353526] [2019-10-13 21:11:28,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:11:28,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:11:28,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:28,299 INFO L87 Difference]: Start difference. First operand 659 states and 1015 transitions. Second operand 9 states. [2019-10-13 21:11:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:29,568 INFO L93 Difference]: Finished difference Result 704 states and 1075 transitions. [2019-10-13 21:11:29,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:11:29,569 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-13 21:11:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:29,574 INFO L225 Difference]: With dead ends: 704 [2019-10-13 21:11:29,574 INFO L226 Difference]: Without dead ends: 687 [2019-10-13 21:11:29,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 313 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:11:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-13 21:11:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 673. [2019-10-13 21:11:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-13 21:11:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1034 transitions. [2019-10-13 21:11:29,599 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1034 transitions. Word has length 155 [2019-10-13 21:11:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:29,599 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1034 transitions. [2019-10-13 21:11:29,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:11:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1034 transitions. [2019-10-13 21:11:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 21:11:29,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:29,604 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:29,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:29,811 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1624631089, now seen corresponding path program 1 times [2019-10-13 21:11:29,811 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:29,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952840499] [2019-10-13 21:11:29,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:29,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:29,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:11:29,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952840499] [2019-10-13 21:11:29,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23895035] [2019-10-13 21:11:29,986 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 [2019-10-13 21:11:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:30,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 2795 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:11:30,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:30,605 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 21:11:30,948 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:30,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [11] total 14 [2019-10-13 21:11:30,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824887289] [2019-10-13 21:11:30,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:11:30,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:11:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:11:30,950 INFO L87 Difference]: Start difference. First operand 673 states and 1034 transitions. Second operand 5 states. [2019-10-13 21:11:30,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:30,987 INFO L93 Difference]: Finished difference Result 690 states and 1054 transitions. [2019-10-13 21:11:30,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:11:30,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-13 21:11:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:30,992 INFO L225 Difference]: With dead ends: 690 [2019-10-13 21:11:30,992 INFO L226 Difference]: Without dead ends: 673 [2019-10-13 21:11:30,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 329 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:11:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-10-13 21:11:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2019-10-13 21:11:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2019-10-13 21:11:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1032 transitions. [2019-10-13 21:11:31,018 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1032 transitions. Word has length 161 [2019-10-13 21:11:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:31,019 INFO L462 AbstractCegarLoop]: Abstraction has 673 states and 1032 transitions. [2019-10-13 21:11:31,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:11:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1032 transitions. [2019-10-13 21:11:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 21:11:31,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:31,025 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:31,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:31,234 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1739480465, now seen corresponding path program 1 times [2019-10-13 21:11:31,235 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:31,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187265939] [2019-10-13 21:11:31,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:31,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:31,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 21:11:31,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187265939] [2019-10-13 21:11:31,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168377826] [2019-10-13 21:11:31,438 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 [2019-10-13 21:11:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:32,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 21:11:32,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:11:32,209 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:11:32,634 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:32,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [11] total 18 [2019-10-13 21:11:32,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56817541] [2019-10-13 21:11:32,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:11:32,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:11:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:11:32,637 INFO L87 Difference]: Start difference. First operand 673 states and 1032 transitions. Second operand 9 states. [2019-10-13 21:11:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:37,724 INFO L93 Difference]: Finished difference Result 1972 states and 3106 transitions. [2019-10-13 21:11:37,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 21:11:37,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 179 [2019-10-13 21:11:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:37,732 INFO L225 Difference]: With dead ends: 1972 [2019-10-13 21:11:37,733 INFO L226 Difference]: Without dead ends: 1365 [2019-10-13 21:11:37,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-10-13 21:11:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2019-10-13 21:11:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1322. [2019-10-13 21:11:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2019-10-13 21:11:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2071 transitions. [2019-10-13 21:11:37,836 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2071 transitions. Word has length 179 [2019-10-13 21:11:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:11:37,837 INFO L462 AbstractCegarLoop]: Abstraction has 1322 states and 2071 transitions. [2019-10-13 21:11:37,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:11:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2071 transitions. [2019-10-13 21:11:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 21:11:37,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:11:37,846 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:11:38,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:11:38,057 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:11:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:11:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash -802437721, now seen corresponding path program 1 times [2019-10-13 21:11:38,059 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:11:38,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308424533] [2019-10-13 21:11:38,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:11:38,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:11:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-13 21:11:38,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308424533] [2019-10-13 21:11:38,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780770795] [2019-10-13 21:11:38,354 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 [2019-10-13 21:11:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:11:39,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 21:11:39,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:11:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:11:39,296 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:11:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:11:39,640 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:11:39,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-13 21:11:39,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190675340] [2019-10-13 21:11:39,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:11:39,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:11:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:11:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:39,643 INFO L87 Difference]: Start difference. First operand 1322 states and 2071 transitions. Second operand 3 states. [2019-10-13 21:11:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:11:39,864 INFO L93 Difference]: Finished difference Result 3168 states and 5035 transitions. [2019-10-13 21:11:39,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:11:39,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-10-13 21:11:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:11:39,886 INFO L225 Difference]: With dead ends: 3168 [2019-10-13 21:11:39,886 INFO L226 Difference]: Without dead ends: 1923 [2019-10-13 21:11:39,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:11:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states.