java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label37_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 21:23:14,854 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 21:23:14,856 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 21:23:14,873 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 21:23:14,874 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 21:23:14,876 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 21:23:14,878 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 21:23:14,881 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 21:23:14,883 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 21:23:14,884 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 21:23:14,885 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 21:23:14,885 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 21:23:14,895 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 21:23:14,896 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 21:23:14,900 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 21:23:14,901 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 21:23:14,902 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 21:23:14,904 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 21:23:14,906 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 21:23:14,907 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 21:23:14,908 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 21:23:14,909 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 21:23:14,912 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 21:23:14,912 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 21:23:14,912 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 21:23:14,913 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 21:23:14,914 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 21:23:14,915 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 21:23:14,915 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 21:23:14,917 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 21:23:14,917 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 21:23:14,918 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 21:23:14,918 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 21:23:14,918 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 21:23:14,919 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 21:23:14,920 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 21:23:14,920 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 21:23:14,945 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 21:23:14,946 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 21:23:14,947 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 21:23:14,947 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 21:23:14,947 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 21:23:14,947 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 21:23:14,948 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 21:23:14,948 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 21:23:14,948 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 21:23:14,948 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 21:23:14,948 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 21:23:14,949 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 21:23:14,949 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 21:23:14,950 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 21:23:14,950 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 21:23:14,950 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 21:23:14,950 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 21:23:14,950 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 21:23:14,951 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 21:23:14,951 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 21:23:14,951 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 21:23:14,951 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 21:23:14,951 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 21:23:14,952 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 21:23:14,952 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 21:23:14,952 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 21:23:14,952 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 21:23:14,952 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 21:23:14,953 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 21:23:14,953 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 21:23:14,953 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 21:23:14,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 21:23:14,953 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 21:23:14,954 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 21:23:14,954 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 21:23:15,017 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 21:23:15,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 21:23:15,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 21:23:15,041 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 21:23:15,042 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 21:23:15,043 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label37_true-unreach-call.c [2018-11-07 21:23:15,110 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acc6f2dd2/ddb878d537124e2097710ea2ca27d6a9/FLAG405651eae [2018-11-07 21:23:15,979 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 21:23:15,980 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label37_true-unreach-call.c [2018-11-07 21:23:16,023 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acc6f2dd2/ddb878d537124e2097710ea2ca27d6a9/FLAG405651eae [2018-11-07 21:23:16,038 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acc6f2dd2/ddb878d537124e2097710ea2ca27d6a9 [2018-11-07 21:23:16,049 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 21:23:16,051 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 21:23:16,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 21:23:16,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 21:23:16,058 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 21:23:16,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:23:16" (1/1) ... [2018-11-07 21:23:16,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d6e334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:16, skipping insertion in model container [2018-11-07 21:23:16,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:23:16" (1/1) ... [2018-11-07 21:23:16,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 21:23:16,346 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 21:23:18,326 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:23:18,332 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 21:23:19,482 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:23:19,539 INFO L193 MainTranslator]: Completed translation [2018-11-07 21:23:19,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19 WrapperNode [2018-11-07 21:23:19,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 21:23:19,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 21:23:19,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 21:23:19,541 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 21:23:19,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 21:23:20,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 21:23:20,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 21:23:20,077 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 21:23:20,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (1/1) ... [2018-11-07 21:23:20,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 21:23:20,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 21:23:20,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 21:23:20,563 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 21:23:20,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (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 [2018-11-07 21:23:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 21:23:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 21:23:20,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 21:23:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2018-11-07 21:23:20,634 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2018-11-07 21:23:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2018-11-07 21:23:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2018-11-07 21:23:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 21:23:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 21:23:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 21:23:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 21:23:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 21:23:20,636 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 21:23:20,637 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 21:23:20,637 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 21:23:20,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 21:23:20,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 21:23:20,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 21:23:20,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 21:23:36,157 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 21:23:36,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:23:36 BoogieIcfgContainer [2018-11-07 21:23:36,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 21:23:36,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 21:23:36,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 21:23:36,163 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 21:23:36,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:23:16" (1/3) ... [2018-11-07 21:23:36,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac7ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:23:36, skipping insertion in model container [2018-11-07 21:23:36,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:23:19" (2/3) ... [2018-11-07 21:23:36,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac7ac0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:23:36, skipping insertion in model container [2018-11-07 21:23:36,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:23:36" (3/3) ... [2018-11-07 21:23:36,166 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label37_true-unreach-call.c [2018-11-07 21:23:36,176 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 21:23:36,186 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 21:23:36,204 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 21:23:36,257 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 21:23:36,257 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 21:23:36,257 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 21:23:36,258 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 21:23:36,258 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 21:23:36,258 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 21:23:36,258 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 21:23:36,258 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 21:23:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states. [2018-11-07 21:23:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-07 21:23:36,328 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:23:36,329 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:23:36,332 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:23:36,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:23:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1282298446, now seen corresponding path program 1 times [2018-11-07 21:23:36,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:23:36,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:23:36,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:23:36,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:23:36,393 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:23:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:23:36,799 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-07 21:23:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:23:36,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:23:36,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:23:36,813 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:23:36,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:23:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:23:36,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:23:36,838 INFO L87 Difference]: Start difference. First operand 1778 states. Second operand 4 states. [2018-11-07 21:23:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:23:58,593 INFO L93 Difference]: Finished difference Result 6513 states and 12383 transitions. [2018-11-07 21:23:58,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:23:58,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2018-11-07 21:23:58,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:23:58,665 INFO L225 Difference]: With dead ends: 6513 [2018-11-07 21:23:58,665 INFO L226 Difference]: Without dead ends: 4729 [2018-11-07 21:23:58,796 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:23:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2018-11-07 21:23:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 4693. [2018-11-07 21:23:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2018-11-07 21:23:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 7735 transitions. [2018-11-07 21:23:59,041 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 7735 transitions. Word has length 45 [2018-11-07 21:23:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:23:59,042 INFO L480 AbstractCegarLoop]: Abstraction has 4693 states and 7735 transitions. [2018-11-07 21:23:59,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:23:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 7735 transitions. [2018-11-07 21:23:59,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-07 21:23:59,051 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:23:59,052 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:23:59,052 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:23:59,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:23:59,052 INFO L82 PathProgramCache]: Analyzing trace with hash 889446652, now seen corresponding path program 1 times [2018-11-07 21:23:59,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:23:59,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:23:59,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:23:59,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:23:59,056 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:23:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:23:59,449 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:23:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:23:59,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:23:59,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 21:23:59,814 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:23:59,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:23:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:23:59,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:23:59,817 INFO L87 Difference]: Start difference. First operand 4693 states and 7735 transitions. Second operand 6 states. [2018-11-07 21:24:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:24:21,800 INFO L93 Difference]: Finished difference Result 17886 states and 30173 transitions. [2018-11-07 21:24:21,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:24:21,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-11-07 21:24:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:24:21,860 INFO L225 Difference]: With dead ends: 17886 [2018-11-07 21:24:21,861 INFO L226 Difference]: Without dead ends: 13199 [2018-11-07 21:24:21,878 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:24:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13199 states. [2018-11-07 21:24:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13199 to 13130. [2018-11-07 21:24:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13130 states. [2018-11-07 21:24:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13130 states to 13130 states and 19368 transitions. [2018-11-07 21:24:22,194 INFO L78 Accepts]: Start accepts. Automaton has 13130 states and 19368 transitions. Word has length 117 [2018-11-07 21:24:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:24:22,195 INFO L480 AbstractCegarLoop]: Abstraction has 13130 states and 19368 transitions. [2018-11-07 21:24:22,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:24:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 13130 states and 19368 transitions. [2018-11-07 21:24:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-07 21:24:22,200 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:24:22,201 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:24:22,201 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:24:22,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:24:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1968737342, now seen corresponding path program 1 times [2018-11-07 21:24:22,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:24:22,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:24:22,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:24:22,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:24:22,203 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:24:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:24:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:24:22,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:24:22,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 21:24:22,671 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:24:22,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:24:22,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:24:22,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:24:22,673 INFO L87 Difference]: Start difference. First operand 13130 states and 19368 transitions. Second operand 6 states. [2018-11-07 21:24:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:24:39,833 INFO L93 Difference]: Finished difference Result 39909 states and 60267 transitions. [2018-11-07 21:24:39,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 21:24:39,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2018-11-07 21:24:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:24:39,938 INFO L225 Difference]: With dead ends: 39909 [2018-11-07 21:24:39,938 INFO L226 Difference]: Without dead ends: 26785 [2018-11-07 21:24:39,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:24:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26785 states. [2018-11-07 21:24:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26785 to 26529. [2018-11-07 21:24:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26529 states. [2018-11-07 21:24:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26529 states to 26529 states and 38633 transitions. [2018-11-07 21:24:40,526 INFO L78 Accepts]: Start accepts. Automaton has 26529 states and 38633 transitions. Word has length 127 [2018-11-07 21:24:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:24:40,527 INFO L480 AbstractCegarLoop]: Abstraction has 26529 states and 38633 transitions. [2018-11-07 21:24:40,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:24:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26529 states and 38633 transitions. [2018-11-07 21:24:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-07 21:24:40,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:24:40,533 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:24:40,533 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:24:40,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:24:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1600159600, now seen corresponding path program 1 times [2018-11-07 21:24:40,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:24:40,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:24:40,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:24:40,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:24:40,539 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:24:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:24:40,840 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:24:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:24:41,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:24:41,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 21:24:41,048 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:24:41,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:24:41,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:24:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:24:41,049 INFO L87 Difference]: Start difference. First operand 26529 states and 38633 transitions. Second operand 6 states. [2018-11-07 21:24:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:24:59,305 INFO L93 Difference]: Finished difference Result 70563 states and 107143 transitions. [2018-11-07 21:24:59,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:24:59,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2018-11-07 21:24:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:24:59,464 INFO L225 Difference]: With dead ends: 70563 [2018-11-07 21:24:59,464 INFO L226 Difference]: Without dead ends: 44040 [2018-11-07 21:24:59,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:24:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44040 states. [2018-11-07 21:25:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44040 to 43859. [2018-11-07 21:25:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43859 states. [2018-11-07 21:25:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43859 states to 43859 states and 61108 transitions. [2018-11-07 21:25:00,740 INFO L78 Accepts]: Start accepts. Automaton has 43859 states and 61108 transitions. Word has length 160 [2018-11-07 21:25:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:25:00,740 INFO L480 AbstractCegarLoop]: Abstraction has 43859 states and 61108 transitions. [2018-11-07 21:25:00,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:25:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 43859 states and 61108 transitions. [2018-11-07 21:25:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-11-07 21:25:00,744 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:25:00,745 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:25:00,745 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:25:00,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:25:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1164760866, now seen corresponding path program 1 times [2018-11-07 21:25:00,745 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:25:00,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:25:00,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:25:00,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:25:00,747 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:25:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:25:00,987 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 21:25:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 76 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:25:01,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:25:01,169 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:25:01,170 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 197 with the following transitions: [2018-11-07 21:25:01,172 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5486], [5488], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5724], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5769], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-11-07 21:25:01,224 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:25:01,224 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:25:01,750 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 21:25:01,752 INFO L272 AbstractInterpreter]: Visited 84 different actions 84 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 21:25:01,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:25:01,802 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 21:25:02,297 INFO L227 lantSequenceWeakener]: Weakened 185 states. On average, predicates are now at 75.51% of their original sizes. [2018-11-07 21:25:02,297 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 21:25:02,630 INFO L415 sIntCurrentIteration]: We unified 195 AI predicates to 195 [2018-11-07 21:25:02,630 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 21:25:02,631 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 21:25:02,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 21:25:02,632 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:25:02,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 21:25:02,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 21:25:02,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 21:25:02,633 INFO L87 Difference]: Start difference. First operand 43859 states and 61108 transitions. Second operand 7 states. [2018-11-07 21:25:10,637 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:26:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:26:39,208 INFO L93 Difference]: Finished difference Result 89104 states and 123926 transitions. [2018-11-07 21:26:39,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:26:39,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2018-11-07 21:26:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:26:39,323 INFO L225 Difference]: With dead ends: 89104 [2018-11-07 21:26:39,323 INFO L226 Difference]: Without dead ends: 45251 [2018-11-07 21:26:39,377 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:26:39,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45251 states. [2018-11-07 21:26:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45251 to 45249. [2018-11-07 21:26:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45249 states. [2018-11-07 21:26:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45249 states to 45249 states and 62514 transitions. [2018-11-07 21:26:40,054 INFO L78 Accepts]: Start accepts. Automaton has 45249 states and 62514 transitions. Word has length 196 [2018-11-07 21:26:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:26:40,055 INFO L480 AbstractCegarLoop]: Abstraction has 45249 states and 62514 transitions. [2018-11-07 21:26:40,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 21:26:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 45249 states and 62514 transitions. [2018-11-07 21:26:40,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-11-07 21:26:40,062 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:26:40,062 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:26:40,063 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:26:40,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:26:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1697445094, now seen corresponding path program 1 times [2018-11-07 21:26:40,064 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:26:40,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:26:40,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:26:40,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:26:40,065 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:26:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:26:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 21:26:41,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:26:41,457 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:26:41,457 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 358 with the following transitions: [2018-11-07 21:26:41,458 INFO L202 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5486], [5488], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5724], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6560], [6802], [6806], [6810], [6816], [6820], [6822], [6837], [6838], [6839], [6841], [6842] [2018-11-07 21:26:41,475 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:26:41,475 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-11-07 21:26:41,807 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 21:26:41,808 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 21:26:41,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 21:26:41,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:26:41,810 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:26:41,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:26:41,820 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:26:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:26:41,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:26:41,983 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 21:26:42,184 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 21:26:42,184 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 21:26:42,188 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 21:26:42,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:26:42 BoogieIcfgContainer [2018-11-07 21:26:42,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 21:26:42,189 INFO L168 Benchmark]: Toolchain (without parser) took 206139.38 ms. Allocated memory was 1.5 GB in the beginning and 5.8 GB in the end (delta: 4.2 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-11-07 21:26:42,191 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 21:26:42,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 3488.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 998.7 MB in the end (delta: 394.6 MB). Peak memory consumption was 394.6 MB. Max. memory is 7.1 GB. [2018-11-07 21:26:42,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 535.54 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 843.6 MB). Free memory was 998.7 MB in the beginning and 2.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. [2018-11-07 21:26:42,193 INFO L168 Benchmark]: Boogie Preprocessor took 485.61 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2018-11-07 21:26:42,194 INFO L168 Benchmark]: RCFGBuilder took 15595.66 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 158.3 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 498.0 MB). Peak memory consumption was 670.1 MB. Max. memory is 7.1 GB. [2018-11-07 21:26:42,195 INFO L168 Benchmark]: TraceAbstraction took 186029.44 ms. Allocated memory was 2.5 GB in the beginning and 5.8 GB in the end (delta: 3.2 GB). Free memory was 1.7 GB in the beginning and 2.6 GB in the end (delta: -849.7 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. [2018-11-07 21:26:42,201 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 3488.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 998.7 MB in the end (delta: 394.6 MB). Peak memory consumption was 394.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 535.54 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 843.6 MB). Free memory was 998.7 MB in the beginning and 2.3 GB in the end (delta: -1.3 GB). Peak memory consumption was 99.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 485.61 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 51.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 15595.66 ms. Allocated memory was 2.4 GB in the beginning and 2.5 GB in the end (delta: 158.3 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 498.0 MB). Peak memory consumption was 670.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 186029.44 ms. Allocated memory was 2.5 GB in the beginning and 5.8 GB in the end (delta: 3.2 GB). Free memory was 1.7 GB in the beginning and 2.6 GB in the end (delta: -849.7 MB). Peak memory consumption was 2.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 130]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 130). Cancelled while BasicCegarLoop was analyzing trace of length 358 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 1778 locations, 1 error locations. TIMEOUT Result, 185.9s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 176.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4946 SDtfs, 28499 SDslu, 3944 SDs, 0 SdLazy, 48275 SolverSat, 9834 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 110.2s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 232 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45249occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.9s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.9975744062700587 AbsIntWeakeningRatio, 0.14358974358974358 AbsIntAvgWeakeningVarsNumRemoved, 19.08205128205128 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 5 MinimizatonAttempts, 544 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 645 NumberOfCodeBlocks, 645 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 640 ConstructedInterpolants, 0 QuantifiedInterpolants, 382895 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 195/260 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown