java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/diff-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:37:18,904 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:37:18,907 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:37:18,925 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:37:18,925 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:37:18,928 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:37:18,930 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:37:18,932 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:37:18,934 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:37:18,935 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:37:18,936 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:37:18,936 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:37:18,937 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:37:18,939 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:37:18,940 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:37:18,942 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:37:18,945 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:37:18,947 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:37:18,949 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:37:18,950 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:37:18,953 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-25 02:37:18,959 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:37:18,960 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:37:18,960 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-25 02:37:18,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:37:18,971 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:37:18,972 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:37:18,974 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:37:18,974 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:37:18,974 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:37:18,974 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:37:18,975 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:37:18,975 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:37:18,975 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:37:18,976 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:37:18,976 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:37:18,976 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:37:18,976 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:37:18,976 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:37:18,977 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:37:18,977 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:37:18,977 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:37:18,977 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:37:18,977 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:37:18,977 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:37:18,978 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:37:18,978 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:37:18,979 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:37:18,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:37:18,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:37:18,980 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:37:18,980 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:37:18,980 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:37:18,980 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:37:18,981 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:37:18,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:37:18,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:37:18,981 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:37:18,981 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:37:18,982 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:37:18,982 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:37:19,048 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:37:19,063 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:37:19,068 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:37:19,070 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:37:19,070 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:37:19,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/diff-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:37:19,254 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:37:19,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:37:19,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:37:19,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:37:19,266 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:37:19,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319d8693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19, skipping insertion in model container [2018-01-25 02:37:19,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,287 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:37:19,330 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:37:19,456 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:37:19,480 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:37:19,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19 WrapperNode [2018-01-25 02:37:19,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:37:19,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:37:19,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:37:19,488 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:37:19,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... [2018-01-25 02:37:19,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:37:19,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:37:19,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:37:19,522 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:37:19,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (1/1) ... No working directory specified, using /storage/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 [2018-01-25 02:37:19,578 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:37:19,578 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:37:19,579 INFO L136 BoogieDeclarations]: Found implementation of procedure diff [2018-01-25 02:37:19,579 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:37:19,579 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:37:19,579 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:37:19,579 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:37:19,579 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:37:19,580 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:37:19,580 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:37:19,580 INFO L128 BoogieDeclarations]: Found specification of procedure diff [2018-01-25 02:37:19,580 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:37:19,580 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:37:19,580 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:37:19,819 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:37:19,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:37:19 BoogieIcfgContainer [2018-01-25 02:37:19,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:37:19,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:37:19,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:37:19,822 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:37:19,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:37:19" (1/3) ... [2018-01-25 02:37:19,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35826bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:37:19, skipping insertion in model container [2018-01-25 02:37:19,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:37:19" (2/3) ... [2018-01-25 02:37:19,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35826bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:37:19, skipping insertion in model container [2018-01-25 02:37:19,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:37:19" (3/3) ... [2018-01-25 02:37:19,826 INFO L105 eAbstractionObserver]: Analyzing ICFG diff-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:37:19,833 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:37:19,839 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-25 02:37:19,887 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:37:19,887 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:37:19,905 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:37:19,906 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:37:19,906 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:37:19,906 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:37:19,906 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:37:19,906 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:37:19,907 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:37:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2018-01-25 02:37:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-25 02:37:19,940 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:19,941 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:37:19,942 INFO L371 AbstractCegarLoop]: === Iteration 1 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -24174499, now seen corresponding path program 1 times [2018-01-25 02:37:19,948 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:19,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:19,990 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:19,990 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:19,990 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:20,075 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:20,328 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:37:20,328 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 02:37:20,328 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:20,332 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:37:20,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:37:20,414 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:37:20,417 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 6 states. [2018-01-25 02:37:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:20,684 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2018-01-25 02:37:20,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:37:20,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-01-25 02:37:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:20,694 INFO L225 Difference]: With dead ends: 82 [2018-01-25 02:37:20,694 INFO L226 Difference]: Without dead ends: 45 [2018-01-25 02:37:20,697 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:37:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-25 02:37:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-25 02:37:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-25 02:37:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-01-25 02:37:20,732 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 21 [2018-01-25 02:37:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:20,733 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-01-25 02:37:20,733 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:37:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-01-25 02:37:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-25 02:37:20,734 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:20,734 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:37:20,734 INFO L371 AbstractCegarLoop]: === Iteration 2 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:20,734 INFO L82 PathProgramCache]: Analyzing trace with hash -24174498, now seen corresponding path program 1 times [2018-01-25 02:37:20,735 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:20,735 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:20,736 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:20,736 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:20,736 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:20,769 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:20,982 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:37:20,982 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:37:20,982 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:20,984 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:37:20,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:37:20,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:37:20,985 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 8 states. [2018-01-25 02:37:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:21,179 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2018-01-25 02:37:21,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 02:37:21,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-01-25 02:37:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:21,184 INFO L225 Difference]: With dead ends: 65 [2018-01-25 02:37:21,184 INFO L226 Difference]: Without dead ends: 63 [2018-01-25 02:37:21,186 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:37:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-25 02:37:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-01-25 02:37:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-25 02:37:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-01-25 02:37:21,197 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 21 [2018-01-25 02:37:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:21,197 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-01-25 02:37:21,197 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:37:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2018-01-25 02:37:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-25 02:37:21,198 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:21,199 INFO L322 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] [2018-01-25 02:37:21,199 INFO L371 AbstractCegarLoop]: === Iteration 3 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash -749409470, now seen corresponding path program 1 times [2018-01-25 02:37:21,199 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:21,200 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,201 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:21,201 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,201 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:21,222 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:21,282 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:37:21,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 02:37:21,283 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:21,283 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:37:21,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:37:21,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:37:21,284 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2018-01-25 02:37:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:21,392 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2018-01-25 02:37:21,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:37:21,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-25 02:37:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:21,393 INFO L225 Difference]: With dead ends: 54 [2018-01-25 02:37:21,393 INFO L226 Difference]: Without dead ends: 53 [2018-01-25 02:37:21,394 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:37:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-25 02:37:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-25 02:37:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-25 02:37:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2018-01-25 02:37:21,402 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 22 [2018-01-25 02:37:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:21,403 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2018-01-25 02:37:21,403 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:37:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2018-01-25 02:37:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-25 02:37:21,404 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:21,405 INFO L322 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] [2018-01-25 02:37:21,405 INFO L371 AbstractCegarLoop]: === Iteration 4 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash -749409469, now seen corresponding path program 1 times [2018-01-25 02:37:21,406 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:21,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,407 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:21,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,408 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:21,430 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:21,557 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:37:21,558 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-25 02:37:21,558 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:21,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 02:37:21,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 02:37:21,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-25 02:37:21,559 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 9 states. [2018-01-25 02:37:21,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:21,709 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2018-01-25 02:37:21,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 02:37:21,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-01-25 02:37:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:21,711 INFO L225 Difference]: With dead ends: 79 [2018-01-25 02:37:21,712 INFO L226 Difference]: Without dead ends: 78 [2018-01-25 02:37:21,712 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-01-25 02:37:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-25 02:37:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2018-01-25 02:37:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-25 02:37:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2018-01-25 02:37:21,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 22 [2018-01-25 02:37:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:21,723 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2018-01-25 02:37:21,723 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 02:37:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2018-01-25 02:37:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:37:21,725 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:21,725 INFO L322 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] [2018-01-25 02:37:21,725 INFO L371 AbstractCegarLoop]: === Iteration 5 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1756899853, now seen corresponding path program 1 times [2018-01-25 02:37:21,725 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:21,726 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,726 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:21,726 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,726 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:21,741 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:21,796 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:37:21,796 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 02:37:21,796 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:21,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:37:21,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:37:21,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:37:21,797 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 6 states. [2018-01-25 02:37:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:21,873 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2018-01-25 02:37:21,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:37:21,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-25 02:37:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:21,874 INFO L225 Difference]: With dead ends: 63 [2018-01-25 02:37:21,874 INFO L226 Difference]: Without dead ends: 62 [2018-01-25 02:37:21,875 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:37:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-25 02:37:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-25 02:37:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-25 02:37:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2018-01-25 02:37:21,885 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 23 [2018-01-25 02:37:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:21,885 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2018-01-25 02:37:21,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:37:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2018-01-25 02:37:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:37:21,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:21,886 INFO L322 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] [2018-01-25 02:37:21,886 INFO L371 AbstractCegarLoop]: === Iteration 6 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1756899852, now seen corresponding path program 1 times [2018-01-25 02:37:21,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:21,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:21,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:21,888 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:21,903 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:21,947 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:37:21,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 02:37:21,947 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:21,947 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:37:21,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:37:21,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:37:21,948 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 6 states. [2018-01-25 02:37:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:22,098 INFO L93 Difference]: Finished difference Result 107 states and 133 transitions. [2018-01-25 02:37:22,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:37:22,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-25 02:37:22,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:22,102 INFO L225 Difference]: With dead ends: 107 [2018-01-25 02:37:22,102 INFO L226 Difference]: Without dead ends: 73 [2018-01-25 02:37:22,103 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:37:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-25 02:37:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2018-01-25 02:37:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-25 02:37:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2018-01-25 02:37:22,114 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 23 [2018-01-25 02:37:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:22,114 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2018-01-25 02:37:22,114 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:37:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2018-01-25 02:37:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 02:37:22,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:22,115 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:37:22,116 INFO L371 AbstractCegarLoop]: === Iteration 7 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1795864658, now seen corresponding path program 1 times [2018-01-25 02:37:22,116 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:22,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:22,117 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:22,117 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:22,117 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:22,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:22,266 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:37:22,267 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 02:37:22,267 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-01-25 02:37:22,269 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [19], [25], [26], [29], [31], [36], [59], [64], [68], [72], [73], [74], [75], [76], [77], [88], [89], [90], [92] [2018-01-25 02:37:22,321 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 02:37:22,321 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-25 02:37:57,495 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-25 02:37:57,497 INFO L268 AbstractInterpreter]: Visited 24 different actions 30 times. Merged at 6 different actions 6 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 35 variables. [2018-01-25 02:37:57,520 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-25 02:37:57,520 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:37:57,520 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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 [2018-01-25 02:37:57,532 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:57,532 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-25 02:37:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:57,573 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-25 02:37:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:57,683 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-25 02:37:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:57,794 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-25 02:37:57,794 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9] total 15 [2018-01-25 02:37:57,795 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:37:57,795 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-25 02:37:57,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-25 02:37:57,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-01-25 02:37:57,795 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 7 states. [2018-01-25 02:37:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:37:58,037 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2018-01-25 02:37:58,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 02:37:58,037 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-01-25 02:37:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:37:58,039 INFO L225 Difference]: With dead ends: 173 [2018-01-25 02:37:58,039 INFO L226 Difference]: Without dead ends: 132 [2018-01-25 02:37:58,040 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-01-25 02:37:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-25 02:37:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2018-01-25 02:37:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-25 02:37:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2018-01-25 02:37:58,070 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 27 [2018-01-25 02:37:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:37:58,071 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2018-01-25 02:37:58,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-25 02:37:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2018-01-25 02:37:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-25 02:37:58,076 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:37:58,077 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:37:58,077 INFO L371 AbstractCegarLoop]: === Iteration 8 === [diffErr2RequiresViolation, diffErr4RequiresViolation, diffErr0RequiresViolation, diffErr6RequiresViolation, diffErr5RequiresViolation, diffErr1RequiresViolation, diffErr3RequiresViolation, diffErr7RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-25 02:37:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1681454188, now seen corresponding path program 1 times [2018-01-25 02:37:58,077 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:37:58,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:58,078 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:37:58,078 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:37:58,078 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:37:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:37:58,105 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:37:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:37:58,450 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:37:58,450 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 02:37:58,451 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-01-25 02:37:58,451 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [9], [15], [19], [25], [26], [29], [31], [36], [59], [64], [70], [72], [73], [74], [75], [76], [77], [88], [89], [90], [92] [2018-01-25 02:37:58,452 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 02:37:58,453 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown