/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec14_product31.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:39:28,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:39:28,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:39:28,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:39:28,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:39:28,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:39:28,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:39:28,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:39:28,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:39:28,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:39:28,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:39:28,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:39:28,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:39:28,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:39:28,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:39:28,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:39:28,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:39:28,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:39:28,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:39:28,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:39:28,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:39:28,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:39:28,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:39:28,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:39:28,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:39:28,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:39:28,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:39:28,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:39:28,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:39:28,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:39:28,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:39:28,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:39:28,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:39:28,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:39:28,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:39:28,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:39:28,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:39:28,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:39:28,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:39:28,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:39:28,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:39:28,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:39:28,899 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:39:28,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:39:28,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:39:28,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:39:28,901 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:39:28,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:39:28,901 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:39:28,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:39:28,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:39:28,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:39:28,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:39:28,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:39:28,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:39:28,903 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:39:28,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:39:28,903 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:39:28,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:39:28,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:39:28,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:39:28,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:39:28,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:39:28,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:28,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:39:28,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:39:28,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:39:28,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:39:28,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:39:28,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:39:28,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:39:29,173 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:39:29,187 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:39:29,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:39:29,197 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:39:29,198 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:39:29,199 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec14_product31.cil.c [2019-11-07 00:39:29,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744a4c557/b83ce6ae40d84acebed57a4f3e35d28a/FLAG2ad458e46 [2019-11-07 00:39:29,916 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:39:29,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec14_product31.cil.c [2019-11-07 00:39:29,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744a4c557/b83ce6ae40d84acebed57a4f3e35d28a/FLAG2ad458e46 [2019-11-07 00:39:30,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744a4c557/b83ce6ae40d84acebed57a4f3e35d28a [2019-11-07 00:39:30,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:39:30,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:39:30,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:30,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:39:30,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:39:30,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:30" (1/1) ... [2019-11-07 00:39:30,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c92f80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:30, skipping insertion in model container [2019-11-07 00:39:30,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:39:30" (1/1) ... [2019-11-07 00:39:30,134 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:39:30,220 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:39:30,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:30,944 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:39:31,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:39:31,179 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:39:31,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31 WrapperNode [2019-11-07 00:39:31,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:39:31,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:39:31,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:39:31,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:39:31,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... [2019-11-07 00:39:31,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:39:31,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:39:31,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:39:31,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:39:31,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:39:31,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:39:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:39:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:31,453 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-11-07 00:39:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-11-07 00:39:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-11-07 00:39:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-11-07 00:39:31,454 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-11-07 00:39:31,455 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-11-07 00:39:31,455 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-11-07 00:39:31,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-11-07 00:39:31,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:31,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:31,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:31,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-11-07 00:39:31,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-11-07 00:39:31,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-11-07 00:39:31,457 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-11-07 00:39:31,457 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-11-07 00:39:31,457 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-11-07 00:39:31,457 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-11-07 00:39:31,458 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-11-07 00:39:31,458 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-11-07 00:39:31,459 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-11-07 00:39:31,459 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-11-07 00:39:31,459 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-11-07 00:39:31,459 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-11-07 00:39:31,459 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-11-07 00:39:31,459 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-11-07 00:39:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2019-11-07 00:39:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-11-07 00:39:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2019-11-07 00:39:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2019-11-07 00:39:31,460 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-11-07 00:39:31,461 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-11-07 00:39:31,461 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-11-07 00:39:31,461 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-11-07 00:39:31,461 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-11-07 00:39:31,461 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-11-07 00:39:31,462 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-11-07 00:39:31,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-11-07 00:39:31,462 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-11-07 00:39:31,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-11-07 00:39:31,463 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:31,463 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:39:31,463 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-11-07 00:39:31,463 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-11-07 00:39:31,463 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-11-07 00:39:31,464 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:31,464 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:39:31,464 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:31,464 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-11-07 00:39:31,465 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-11-07 00:39:31,465 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-11-07 00:39:31,465 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-11-07 00:39:31,465 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-11-07 00:39:31,465 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2019-11-07 00:39:31,466 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2019-11-07 00:39:31,466 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-11-07 00:39:31,466 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-11-07 00:39:31,466 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-11-07 00:39:31,466 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-11-07 00:39:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-11-07 00:39:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-11-07 00:39:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-11-07 00:39:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-11-07 00:39:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-11-07 00:39:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-11-07 00:39:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-11-07 00:39:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-11-07 00:39:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-11-07 00:39:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-11-07 00:39:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-11-07 00:39:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-11-07 00:39:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:39:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-11-07 00:39:31,470 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-11-07 00:39:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:39:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:39:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-11-07 00:39:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-11-07 00:39:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-11-07 00:39:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-11-07 00:39:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-11-07 00:39:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-11-07 00:39:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-11-07 00:39:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-11-07 00:39:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-11-07 00:39:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:39:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:39:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-11-07 00:39:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:39:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:39:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:39:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:39:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-11-07 00:39:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:39:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-11-07 00:39:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-11-07 00:39:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:39:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-11-07 00:39:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-11-07 00:39:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:39:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-11-07 00:39:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-11-07 00:39:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-11-07 00:39:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-11-07 00:39:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-11-07 00:39:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-11-07 00:39:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-11-07 00:39:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-11-07 00:39:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-11-07 00:39:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-11-07 00:39:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-11-07 00:39:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-11-07 00:39:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-11-07 00:39:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-11-07 00:39:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-11-07 00:39:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-07 00:39:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-11-07 00:39:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-11-07 00:39:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-11-07 00:39:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-11-07 00:39:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-11-07 00:39:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-11-07 00:39:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-11-07 00:39:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2019-11-07 00:39:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2019-11-07 00:39:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2019-11-07 00:39:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2019-11-07 00:39:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2019-11-07 00:39:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-11-07 00:39:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-11-07 00:39:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-11-07 00:39:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-11-07 00:39:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-11-07 00:39:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2019-11-07 00:39:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2019-11-07 00:39:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-11-07 00:39:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-11-07 00:39:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2019-11-07 00:39:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2019-11-07 00:39:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-11-07 00:39:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-11-07 00:39:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-11-07 00:39:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification14_spec__1 [2019-11-07 00:39:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-11-07 00:39:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 00:39:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-11-07 00:39:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-11-07 00:39:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-11-07 00:39:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-11-07 00:39:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-11-07 00:39:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-11-07 00:39:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-11-07 00:39:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-11-07 00:39:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-11-07 00:39:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-11-07 00:39:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-11-07 00:39:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-11-07 00:39:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-11-07 00:39:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-11-07 00:39:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-11-07 00:39:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-11-07 00:39:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-11-07 00:39:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:39:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-11-07 00:39:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:39:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:39:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:39:33,949 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:39:33,949 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 00:39:33,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:33 BoogieIcfgContainer [2019-11-07 00:39:33,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:39:33,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:39:33,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:39:33,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:39:33,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:39:30" (1/3) ... [2019-11-07 00:39:33,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c25ed87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:33, skipping insertion in model container [2019-11-07 00:39:33,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:39:31" (2/3) ... [2019-11-07 00:39:33,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c25ed87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:39:33, skipping insertion in model container [2019-11-07 00:39:33,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:39:33" (3/3) ... [2019-11-07 00:39:33,960 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2019-11-07 00:39:33,970 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:39:33,983 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:39:33,996 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:39:34,047 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:39:34,047 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:39:34,047 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:39:34,048 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:39:34,048 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:39:34,048 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:39:34,048 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:39:34,048 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:39:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states. [2019-11-07 00:39:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 00:39:34,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:34,130 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:34,133 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:34,139 INFO L82 PathProgramCache]: Analyzing trace with hash 716807199, now seen corresponding path program 1 times [2019-11-07 00:39:34,149 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:34,150 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000649652] [2019-11-07 00:39:34,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:34,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000649652] [2019-11-07 00:39:34,877 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:34,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:34,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677826961] [2019-11-07 00:39:34,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:34,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:34,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:34,904 INFO L87 Difference]: Start difference. First operand 782 states. Second operand 4 states. [2019-11-07 00:39:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,149 INFO L93 Difference]: Finished difference Result 1262 states and 2006 transitions. [2019-11-07 00:39:35,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:35,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-07 00:39:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,178 INFO L225 Difference]: With dead ends: 1262 [2019-11-07 00:39:35,179 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:35,194 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 994 transitions. [2019-11-07 00:39:35,315 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 994 transitions. Word has length 135 [2019-11-07 00:39:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,315 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 994 transitions. [2019-11-07 00:39:35,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 994 transitions. [2019-11-07 00:39:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-07 00:39:35,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,324 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:35,325 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,325 INFO L82 PathProgramCache]: Analyzing trace with hash -936222646, now seen corresponding path program 1 times [2019-11-07 00:39:35,326 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250007996] [2019-11-07 00:39:35,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:35,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250007996] [2019-11-07 00:39:35,557 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:35,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:35,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687377571] [2019-11-07 00:39:35,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:35,575 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:35,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:35,576 INFO L87 Difference]: Start difference. First operand 634 states and 994 transitions. Second operand 4 states. [2019-11-07 00:39:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:35,714 INFO L93 Difference]: Finished difference Result 1235 states and 1949 transitions. [2019-11-07 00:39:35,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:35,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-11-07 00:39:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:35,723 INFO L225 Difference]: With dead ends: 1235 [2019-11-07 00:39:35,724 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:35,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 993 transitions. [2019-11-07 00:39:35,785 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 993 transitions. Word has length 136 [2019-11-07 00:39:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:35,787 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 993 transitions. [2019-11-07 00:39:35,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 993 transitions. [2019-11-07 00:39:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-07 00:39:35,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:35,847 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:35,847 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash -291903749, now seen corresponding path program 1 times [2019-11-07 00:39:35,848 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:35,848 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429096813] [2019-11-07 00:39:35,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:35,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429096813] [2019-11-07 00:39:35,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:35,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:35,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016794908] [2019-11-07 00:39:35,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:35,980 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:35,981 INFO L87 Difference]: Start difference. First operand 634 states and 993 transitions. Second operand 4 states. [2019-11-07 00:39:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,062 INFO L93 Difference]: Finished difference Result 1235 states and 1948 transitions. [2019-11-07 00:39:36,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:36,062 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-11-07 00:39:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,068 INFO L225 Difference]: With dead ends: 1235 [2019-11-07 00:39:36,068 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:36,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 992 transitions. [2019-11-07 00:39:36,104 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 992 transitions. Word has length 137 [2019-11-07 00:39:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,104 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 992 transitions. [2019-11-07 00:39:36,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 992 transitions. [2019-11-07 00:39:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 00:39:36,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,113 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:36,113 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1444217882, now seen corresponding path program 1 times [2019-11-07 00:39:36,114 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,114 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697633765] [2019-11-07 00:39:36,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:36,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697633765] [2019-11-07 00:39:36,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:36,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:36,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614188068] [2019-11-07 00:39:36,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:36,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:36,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:36,273 INFO L87 Difference]: Start difference. First operand 634 states and 992 transitions. Second operand 4 states. [2019-11-07 00:39:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,347 INFO L93 Difference]: Finished difference Result 1235 states and 1947 transitions. [2019-11-07 00:39:36,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:36,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 00:39:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,353 INFO L225 Difference]: With dead ends: 1235 [2019-11-07 00:39:36,353 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:36,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 991 transitions. [2019-11-07 00:39:36,385 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 991 transitions. Word has length 138 [2019-11-07 00:39:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,385 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 991 transitions. [2019-11-07 00:39:36,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 991 transitions. [2019-11-07 00:39:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-07 00:39:36,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,391 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:36,391 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1837386199, now seen corresponding path program 1 times [2019-11-07 00:39:36,392 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144654562] [2019-11-07 00:39:36,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:36,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144654562] [2019-11-07 00:39:36,567 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:36,567 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:36,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290473822] [2019-11-07 00:39:36,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:36,568 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:36,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:36,569 INFO L87 Difference]: Start difference. First operand 634 states and 991 transitions. Second operand 4 states. [2019-11-07 00:39:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:36,649 INFO L93 Difference]: Finished difference Result 1235 states and 1946 transitions. [2019-11-07 00:39:36,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:39:36,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-11-07 00:39:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:36,656 INFO L225 Difference]: With dead ends: 1235 [2019-11-07 00:39:36,656 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:36,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 990 transitions. [2019-11-07 00:39:36,692 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 990 transitions. Word has length 139 [2019-11-07 00:39:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:36,693 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 990 transitions. [2019-11-07 00:39:36,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 990 transitions. [2019-11-07 00:39:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:36,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:36,698 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:36,698 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 836534146, now seen corresponding path program 1 times [2019-11-07 00:39:36,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:36,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168815927] [2019-11-07 00:39:36,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:36,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168815927] [2019-11-07 00:39:36,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:36,891 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-07 00:39:36,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667665264] [2019-11-07 00:39:36,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:39:36,892 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:39:36,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:39:36,893 INFO L87 Difference]: Start difference. First operand 634 states and 990 transitions. Second operand 10 states. [2019-11-07 00:39:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:37,095 INFO L93 Difference]: Finished difference Result 1240 states and 1953 transitions. [2019-11-07 00:39:37,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 00:39:37,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-07 00:39:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:37,101 INFO L225 Difference]: With dead ends: 1240 [2019-11-07 00:39:37,102 INFO L226 Difference]: Without dead ends: 643 [2019-11-07 00:39:37,105 INFO L630 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 [2019-11-07 00:39:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2019-11-07 00:39:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 641. [2019-11-07 00:39:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-11-07 00:39:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1000 transitions. [2019-11-07 00:39:37,143 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1000 transitions. Word has length 140 [2019-11-07 00:39:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:37,143 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1000 transitions. [2019-11-07 00:39:37,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:39:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1000 transitions. [2019-11-07 00:39:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-07 00:39:37,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:37,152 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:37,152 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash -150048543, now seen corresponding path program 1 times [2019-11-07 00:39:37,153 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:37,153 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025782787] [2019-11-07 00:39:37,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:37,378 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025782787] [2019-11-07 00:39:37,378 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:37,379 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 00:39:37,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840449008] [2019-11-07 00:39:37,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:39:37,380 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:39:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 00:39:37,381 INFO L87 Difference]: Start difference. First operand 641 states and 1000 transitions. Second operand 4 states. [2019-11-07 00:39:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:37,472 INFO L93 Difference]: Finished difference Result 1241 states and 1954 transitions. [2019-11-07 00:39:37,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:39:37,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-11-07 00:39:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:37,481 INFO L225 Difference]: With dead ends: 1241 [2019-11-07 00:39:37,482 INFO L226 Difference]: Without dead ends: 637 [2019-11-07 00:39:37,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:39:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-11-07 00:39:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2019-11-07 00:39:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2019-11-07 00:39:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 993 transitions. [2019-11-07 00:39:37,525 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 993 transitions. Word has length 140 [2019-11-07 00:39:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:37,526 INFO L462 AbstractCegarLoop]: Abstraction has 637 states and 993 transitions. [2019-11-07 00:39:37,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:39:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 993 transitions. [2019-11-07 00:39:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-07 00:39:37,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:37,534 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:37,534 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1527718111, now seen corresponding path program 1 times [2019-11-07 00:39:37,535 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:37,535 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603928812] [2019-11-07 00:39:37,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:37,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603928812] [2019-11-07 00:39:37,748 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:37,748 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:37,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321527396] [2019-11-07 00:39:37,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:37,749 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:37,750 INFO L87 Difference]: Start difference. First operand 637 states and 993 transitions. Second operand 6 states. [2019-11-07 00:39:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:38,168 INFO L93 Difference]: Finished difference Result 1254 states and 1978 transitions. [2019-11-07 00:39:38,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 00:39:38,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-07 00:39:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:38,177 INFO L225 Difference]: With dead ends: 1254 [2019-11-07 00:39:38,178 INFO L226 Difference]: Without dead ends: 645 [2019-11-07 00:39:38,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-07 00:39:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 642. [2019-11-07 00:39:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:39:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 994 transitions. [2019-11-07 00:39:38,222 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 994 transitions. Word has length 141 [2019-11-07 00:39:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:38,223 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 994 transitions. [2019-11-07 00:39:38,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 994 transitions. [2019-11-07 00:39:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 00:39:38,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:38,231 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:38,231 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash 567172613, now seen corresponding path program 1 times [2019-11-07 00:39:38,232 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:38,232 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654955087] [2019-11-07 00:39:38,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:38,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654955087] [2019-11-07 00:39:38,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:38,501 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:38,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697814578] [2019-11-07 00:39:38,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:38,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:38,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:38,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:38,505 INFO L87 Difference]: Start difference. First operand 642 states and 994 transitions. Second operand 6 states. [2019-11-07 00:39:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:38,820 INFO L93 Difference]: Finished difference Result 1217 states and 1893 transitions. [2019-11-07 00:39:38,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:38,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-07 00:39:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:38,830 INFO L225 Difference]: With dead ends: 1217 [2019-11-07 00:39:38,830 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:39:38,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:39:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:39:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:39:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 990 transitions. [2019-11-07 00:39:38,864 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 990 transitions. Word has length 142 [2019-11-07 00:39:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:38,864 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 990 transitions. [2019-11-07 00:39:38,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 990 transitions. [2019-11-07 00:39:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:38,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:38,876 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:38,876 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -265339100, now seen corresponding path program 1 times [2019-11-07 00:39:38,877 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:38,877 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909314039] [2019-11-07 00:39:38,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:39,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909314039] [2019-11-07 00:39:39,014 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:39,014 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:39,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240382189] [2019-11-07 00:39:39,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:39,016 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:39,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:39,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:39,016 INFO L87 Difference]: Start difference. First operand 642 states and 990 transitions. Second operand 6 states. [2019-11-07 00:39:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:39,287 INFO L93 Difference]: Finished difference Result 1217 states and 1889 transitions. [2019-11-07 00:39:39,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:39,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-07 00:39:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:39,297 INFO L225 Difference]: With dead ends: 1217 [2019-11-07 00:39:39,298 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:39:39,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:39:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:39:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:39:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 986 transitions. [2019-11-07 00:39:39,333 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 986 transitions. Word has length 143 [2019-11-07 00:39:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:39,334 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 986 transitions. [2019-11-07 00:39:39,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 986 transitions. [2019-11-07 00:39:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-07 00:39:39,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:39,342 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:39,343 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash 11991972, now seen corresponding path program 1 times [2019-11-07 00:39:39,343 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:39,344 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064402155] [2019-11-07 00:39:39,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:39,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064402155] [2019-11-07 00:39:39,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:39,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 00:39:39,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437674100] [2019-11-07 00:39:39,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 00:39:39,496 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 00:39:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:39:39,496 INFO L87 Difference]: Start difference. First operand 642 states and 986 transitions. Second operand 7 states. [2019-11-07 00:39:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:39,602 INFO L93 Difference]: Finished difference Result 1220 states and 1889 transitions. [2019-11-07 00:39:39,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:39,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2019-11-07 00:39:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:39,608 INFO L225 Difference]: With dead ends: 1220 [2019-11-07 00:39:39,609 INFO L226 Difference]: Without dead ends: 624 [2019-11-07 00:39:39,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2019-11-07 00:39:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 621. [2019-11-07 00:39:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:39:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 949 transitions. [2019-11-07 00:39:39,645 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 949 transitions. Word has length 143 [2019-11-07 00:39:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:39,645 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 949 transitions. [2019-11-07 00:39:39,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 00:39:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 949 transitions. [2019-11-07 00:39:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 00:39:39,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:39,651 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:39,651 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1423770774, now seen corresponding path program 1 times [2019-11-07 00:39:39,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:39,652 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705338752] [2019-11-07 00:39:39,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:39,849 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705338752] [2019-11-07 00:39:39,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:39,849 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:39,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115140158] [2019-11-07 00:39:39,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:39,851 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:39,852 INFO L87 Difference]: Start difference. First operand 621 states and 949 transitions. Second operand 6 states. [2019-11-07 00:39:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:39,998 INFO L93 Difference]: Finished difference Result 1196 states and 1848 transitions. [2019-11-07 00:39:39,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:39,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-11-07 00:39:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:40,004 INFO L225 Difference]: With dead ends: 1196 [2019-11-07 00:39:40,004 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:39:40,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:39:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:39:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:39:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 948 transitions. [2019-11-07 00:39:40,045 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 948 transitions. Word has length 144 [2019-11-07 00:39:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:40,045 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 948 transitions. [2019-11-07 00:39:40,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 948 transitions. [2019-11-07 00:39:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 00:39:40,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:40,054 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:40,054 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 199180649, now seen corresponding path program 1 times [2019-11-07 00:39:40,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:40,055 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740008360] [2019-11-07 00:39:40,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:40,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740008360] [2019-11-07 00:39:40,272 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:40,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:39:40,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727483085] [2019-11-07 00:39:40,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:40,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:39:40,276 INFO L87 Difference]: Start difference. First operand 621 states and 948 transitions. Second operand 6 states. [2019-11-07 00:39:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:40,464 INFO L93 Difference]: Finished difference Result 1196 states and 1847 transitions. [2019-11-07 00:39:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:40,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-11-07 00:39:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:40,473 INFO L225 Difference]: With dead ends: 1196 [2019-11-07 00:39:40,473 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 00:39:40,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:39:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 00:39:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2019-11-07 00:39:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-07 00:39:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 947 transitions. [2019-11-07 00:39:40,509 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 947 transitions. Word has length 145 [2019-11-07 00:39:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:40,511 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 947 transitions. [2019-11-07 00:39:40,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 947 transitions. [2019-11-07 00:39:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 00:39:40,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:40,519 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:40,520 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2145662159, now seen corresponding path program 1 times [2019-11-07 00:39:40,521 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:40,521 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55685116] [2019-11-07 00:39:40,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 00:39:40,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55685116] [2019-11-07 00:39:40,752 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:39:40,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-07 00:39:40,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060581859] [2019-11-07 00:39:40,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 00:39:40,753 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 00:39:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:40,754 INFO L87 Difference]: Start difference. First operand 621 states and 947 transitions. Second operand 12 states. [2019-11-07 00:39:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:41,053 INFO L93 Difference]: Finished difference Result 1202 states and 1857 transitions. [2019-11-07 00:39:41,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 00:39:41,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 146 [2019-11-07 00:39:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:41,059 INFO L225 Difference]: With dead ends: 1202 [2019-11-07 00:39:41,060 INFO L226 Difference]: Without dead ends: 628 [2019-11-07 00:39:41,066 INFO L630 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 [2019-11-07 00:39:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-11-07 00:39:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2019-11-07 00:39:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-07 00:39:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 953 transitions. [2019-11-07 00:39:41,095 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 953 transitions. Word has length 146 [2019-11-07 00:39:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:41,097 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 953 transitions. [2019-11-07 00:39:41,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 00:39:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 953 transitions. [2019-11-07 00:39:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 00:39:41,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:41,104 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:41,104 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:41,104 INFO L82 PathProgramCache]: Analyzing trace with hash -661438960, now seen corresponding path program 1 times [2019-11-07 00:39:41,105 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:41,105 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557800479] [2019-11-07 00:39:41,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:41,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557800479] [2019-11-07 00:39:41,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882408952] [2019-11-07 00:39:41,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:41,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:41,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:42,008 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-07 00:39:42,415 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:42,415 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:42,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114135592] [2019-11-07 00:39:42,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:42,418 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:42,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:42,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:42,419 INFO L87 Difference]: Start difference. First operand 626 states and 953 transitions. Second operand 5 states. [2019-11-07 00:39:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:43,559 INFO L93 Difference]: Finished difference Result 1207 states and 1893 transitions. [2019-11-07 00:39:43,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:43,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-07 00:39:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:43,566 INFO L225 Difference]: With dead ends: 1207 [2019-11-07 00:39:43,566 INFO L226 Difference]: Without dead ends: 634 [2019-11-07 00:39:43,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 284 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2019-11-07 00:39:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2019-11-07 00:39:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2019-11-07 00:39:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 966 transitions. [2019-11-07 00:39:43,617 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 966 transitions. Word has length 147 [2019-11-07 00:39:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:43,618 INFO L462 AbstractCegarLoop]: Abstraction has 634 states and 966 transitions. [2019-11-07 00:39:43,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 966 transitions. [2019-11-07 00:39:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:39:43,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:43,623 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:43,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:43,830 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1780339208, now seen corresponding path program 1 times [2019-11-07 00:39:43,831 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:43,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030120654] [2019-11-07 00:39:43,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:44,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030120654] [2019-11-07 00:39:44,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352567039] [2019-11-07 00:39:44,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:44,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:44,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:44,695 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 00:39:44,977 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:44,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:44,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850435859] [2019-11-07 00:39:44,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:44,978 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:44,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:44,979 INFO L87 Difference]: Start difference. First operand 634 states and 966 transitions. Second operand 5 states. [2019-11-07 00:39:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:45,951 INFO L93 Difference]: Finished difference Result 1223 states and 1916 transitions. [2019-11-07 00:39:45,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:45,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-11-07 00:39:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:45,961 INFO L225 Difference]: With dead ends: 1223 [2019-11-07 00:39:45,961 INFO L226 Difference]: Without dead ends: 642 [2019-11-07 00:39:45,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2019-11-07 00:39:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2019-11-07 00:39:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2019-11-07 00:39:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 979 transitions. [2019-11-07 00:39:46,004 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 979 transitions. Word has length 150 [2019-11-07 00:39:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:46,004 INFO L462 AbstractCegarLoop]: Abstraction has 642 states and 979 transitions. [2019-11-07 00:39:46,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 979 transitions. [2019-11-07 00:39:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-07 00:39:46,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:46,012 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:46,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:46,222 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1873201556, now seen corresponding path program 1 times [2019-11-07 00:39:46,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:46,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463235930] [2019-11-07 00:39:46,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:46,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463235930] [2019-11-07 00:39:46,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503946164] [2019-11-07 00:39:46,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:47,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:47,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:47,071 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-07 00:39:47,316 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:47,317 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2019-11-07 00:39:47,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524002440] [2019-11-07 00:39:47,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:47,318 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:47,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:47,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:47,319 INFO L87 Difference]: Start difference. First operand 642 states and 979 transitions. Second operand 5 states. [2019-11-07 00:39:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:48,565 INFO L93 Difference]: Finished difference Result 1239 states and 1939 transitions. [2019-11-07 00:39:48,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:48,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-07 00:39:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:48,571 INFO L225 Difference]: With dead ends: 1239 [2019-11-07 00:39:48,571 INFO L226 Difference]: Without dead ends: 650 [2019-11-07 00:39:48,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 296 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2019-11-07 00:39:48,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2019-11-07 00:39:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2019-11-07 00:39:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 992 transitions. [2019-11-07 00:39:48,603 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 992 transitions. Word has length 153 [2019-11-07 00:39:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:48,603 INFO L462 AbstractCegarLoop]: Abstraction has 650 states and 992 transitions. [2019-11-07 00:39:48,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 992 transitions. [2019-11-07 00:39:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-07 00:39:48,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:48,608 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:48,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:48,823 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1298016900, now seen corresponding path program 1 times [2019-11-07 00:39:48,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:48,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459193415] [2019-11-07 00:39:48,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:49,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459193415] [2019-11-07 00:39:49,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460688573] [2019-11-07 00:39:49,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:49,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 2637 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:39:49,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:49,678 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-07 00:39:49,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:49,988 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 12 [2019-11-07 00:39:49,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326830662] [2019-11-07 00:39:49,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:39:49,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:39:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:39:49,989 INFO L87 Difference]: Start difference. First operand 650 states and 992 transitions. Second operand 5 states. [2019-11-07 00:39:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:50,898 INFO L93 Difference]: Finished difference Result 1255 states and 1962 transitions. [2019-11-07 00:39:50,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:39:50,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-11-07 00:39:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:50,903 INFO L225 Difference]: With dead ends: 1255 [2019-11-07 00:39:50,903 INFO L226 Difference]: Without dead ends: 658 [2019-11-07 00:39:50,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 302 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-11-07 00:39:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-11-07 00:39:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2019-11-07 00:39:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2019-11-07 00:39:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1005 transitions. [2019-11-07 00:39:50,933 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1005 transitions. Word has length 156 [2019-11-07 00:39:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:50,934 INFO L462 AbstractCegarLoop]: Abstraction has 658 states and 1005 transitions. [2019-11-07 00:39:50,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:39:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1005 transitions. [2019-11-07 00:39:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:39:50,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:50,940 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:51,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:51,149 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash -878049512, now seen corresponding path program 1 times [2019-11-07 00:39:51,150 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:51,150 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540658128] [2019-11-07 00:39:51,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:51,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540658128] [2019-11-07 00:39:51,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12504381] [2019-11-07 00:39:51,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:51,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-07 00:39:51,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:51,894 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:51,987 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:51,988 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:51,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481527993] [2019-11-07 00:39:51,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:51,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:51,989 INFO L87 Difference]: Start difference. First operand 658 states and 1005 transitions. Second operand 3 states. [2019-11-07 00:39:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:52,028 INFO L93 Difference]: Finished difference Result 1470 states and 2248 transitions. [2019-11-07 00:39:52,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:52,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2019-11-07 00:39:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:52,033 INFO L225 Difference]: With dead ends: 1470 [2019-11-07 00:39:52,034 INFO L226 Difference]: Without dead ends: 865 [2019-11-07 00:39:52,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2019-11-07 00:39:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 862. [2019-11-07 00:39:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 862 states. [2019-11-07 00:39:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1292 transitions. [2019-11-07 00:39:52,072 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1292 transitions. Word has length 159 [2019-11-07 00:39:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:52,073 INFO L462 AbstractCegarLoop]: Abstraction has 862 states and 1292 transitions. [2019-11-07 00:39:52,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1292 transitions. [2019-11-07 00:39:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 00:39:52,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:52,078 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:52,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:52,287 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash -954950310, now seen corresponding path program 1 times [2019-11-07 00:39:52,287 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:52,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892209785] [2019-11-07 00:39:52,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:52,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892209785] [2019-11-07 00:39:52,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255521385] [2019-11-07 00:39:52,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:52,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 00:39:52,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:53,050 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:53,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:53,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10] total 14 [2019-11-07 00:39:53,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87713189] [2019-11-07 00:39:53,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:39:53,261 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:53,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:39:53,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-07 00:39:53,262 INFO L87 Difference]: Start difference. First operand 862 states and 1292 transitions. Second operand 6 states. [2019-11-07 00:39:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:54,079 INFO L93 Difference]: Finished difference Result 2484 states and 3814 transitions. [2019-11-07 00:39:54,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:39:54,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-11-07 00:39:54,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:54,094 INFO L225 Difference]: With dead ends: 2484 [2019-11-07 00:39:54,095 INFO L226 Difference]: Without dead ends: 1676 [2019-11-07 00:39:54,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:39:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2019-11-07 00:39:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1667. [2019-11-07 00:39:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2019-11-07 00:39:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2540 transitions. [2019-11-07 00:39:54,185 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2540 transitions. Word has length 159 [2019-11-07 00:39:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:54,186 INFO L462 AbstractCegarLoop]: Abstraction has 1667 states and 2540 transitions. [2019-11-07 00:39:54,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:39:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2540 transitions. [2019-11-07 00:39:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:54,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:54,191 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:54,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:54,399 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1910070003, now seen corresponding path program 1 times [2019-11-07 00:39:54,399 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:54,400 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397523796] [2019-11-07 00:39:54,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:54,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397523796] [2019-11-07 00:39:54,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22125104] [2019-11-07 00:39:54,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:55,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:39:55,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 00:39:55,141 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 00:39:55,302 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:39:55,302 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2019-11-07 00:39:55,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538328643] [2019-11-07 00:39:55,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:39:55,303 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:39:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:55,303 INFO L87 Difference]: Start difference. First operand 1667 states and 2540 transitions. Second operand 3 states. [2019-11-07 00:39:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:39:55,440 INFO L93 Difference]: Finished difference Result 4078 states and 6298 transitions. [2019-11-07 00:39:55,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:39:55,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-11-07 00:39:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:39:55,457 INFO L225 Difference]: With dead ends: 4078 [2019-11-07 00:39:55,457 INFO L226 Difference]: Without dead ends: 2467 [2019-11-07 00:39:55,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:39:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2019-11-07 00:39:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 1667. [2019-11-07 00:39:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1667 states. [2019-11-07 00:39:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2539 transitions. [2019-11-07 00:39:55,558 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2539 transitions. Word has length 164 [2019-11-07 00:39:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:39:55,559 INFO L462 AbstractCegarLoop]: Abstraction has 1667 states and 2539 transitions. [2019-11-07 00:39:55,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:39:55,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2539 transitions. [2019-11-07 00:39:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 00:39:55,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:39:55,564 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:39:55,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:55,771 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:39:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:39:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1486423281, now seen corresponding path program 1 times [2019-11-07 00:39:55,772 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:39:55,772 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048588007] [2019-11-07 00:39:55,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:39:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:55,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048588007] [2019-11-07 00:39:55,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964991549] [2019-11-07 00:39:55,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:39:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:39:56,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 2659 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-07 00:39:56,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:39:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 00:39:56,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:39:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-07 00:39:56,974 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:39:56,974 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2019-11-07 00:39:56,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082786013] [2019-11-07 00:39:56,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 00:39:56,976 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:39:56,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 00:39:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-11-07 00:39:56,977 INFO L87 Difference]: Start difference. First operand 1667 states and 2539 transitions. Second operand 9 states.