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_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrncpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:11:25,640 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:11:25,642 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:11:25,660 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:11:25,660 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:11:25,661 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:11:25,663 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:11:25,665 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:11:25,667 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:11:25,668 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:11:25,669 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:11:25,670 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:11:25,671 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:11:25,672 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:11:25,673 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:11:25,676 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:11:25,678 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:11:25,680 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:11:25,681 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:11:25,683 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:11:25,686 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:11:25,686 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:11:25,686 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:11:25,688 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:11:25,689 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:11:25,690 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:11:25,691 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:11:25,691 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:11:25,692 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:11:25,692 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:11:25,693 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:11:25,693 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_precise.epf [2018-01-24 23:11:25,704 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:11:25,704 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:11:25,705 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:11:25,705 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:11:25,705 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:11:25,705 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:11:25,706 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:11:25,706 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:11:25,707 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:11:25,707 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:11:25,707 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:11:25,707 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:11:25,708 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:11:25,708 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:11:25,708 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:11:25,708 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:11:25,708 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:11:25,709 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:11:25,709 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:11:25,709 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:11:25,709 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:11:25,709 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:11:25,710 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:11:25,710 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:11:25,710 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:11:25,710 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:11:25,710 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:11:25,711 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:11:25,711 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:11:25,711 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:11:25,711 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:11:25,711 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:11:25,712 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:11:25,712 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:11:25,713 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:11:25,713 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:11:25,750 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:11:25,765 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:11:25,769 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:11:25,771 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:11:25,772 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:11:25,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:11:25,973 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:11:25,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:11:25,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:11:25,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:11:25,988 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:11:25,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:11:25" (1/1) ... [2018-01-24 23:11:25,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cdf0e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:25, skipping insertion in model container [2018-01-24 23:11:25,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:11:25" (1/1) ... [2018-01-24 23:11:26,013 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:11:26,073 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:11:26,248 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:11:26,269 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:11:26,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26 WrapperNode [2018-01-24 23:11:26,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:11:26,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:11:26,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:11:26,279 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:11:26,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (1/1) ... [2018-01-24 23:11:26,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:11:26,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:11:26,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:11:26,334 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:11:26,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (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 [2018-01-24 23:11:26,391 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:11:26,391 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:11:26,391 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncpy [2018-01-24 23:11:26,391 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:11:26,391 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:11:26,392 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:11:26,392 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:11:26,392 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:11:26,395 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:11:26,396 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:11:26,396 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncpy [2018-01-24 23:11:26,396 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:11:26,396 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:11:26,396 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:11:26,769 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:11:26,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:11:26 BoogieIcfgContainer [2018-01-24 23:11:26,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:11:26,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:11:26,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:11:26,772 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:11:26,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:11:25" (1/3) ... [2018-01-24 23:11:26,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23684e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:11:26, skipping insertion in model container [2018-01-24 23:11:26,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:11:26" (2/3) ... [2018-01-24 23:11:26,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23684e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:11:26, skipping insertion in model container [2018-01-24 23:11:26,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:11:26" (3/3) ... [2018-01-24 23:11:26,775 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:11:26,782 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:11:26,789 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-24 23:11:26,841 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:11:26,841 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:11:26,841 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:11:26,842 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:11:26,842 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:11:26,842 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:11:26,842 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:11:26,842 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:11:26,843 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:11:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-01-24 23:11:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:11:26,867 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:26,868 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:26,868 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash 118579097, now seen corresponding path program 1 times [2018-01-24 23:11:26,876 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:26,920 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:26,921 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:26,921 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:26,921 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:26,983 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:27,082 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:27,082 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:11:27,082 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:27,085 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:11:27,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:11:27,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:11:27,097 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2018-01-24 23:11:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:27,320 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-01-24 23:11:27,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:11:27,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:11:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:27,332 INFO L225 Difference]: With dead ends: 59 [2018-01-24 23:11:27,332 INFO L226 Difference]: Without dead ends: 42 [2018-01-24 23:11:27,335 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:11:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-24 23:11:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-24 23:11:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 23:11:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 23:11:27,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 13 [2018-01-24 23:11:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:27,370 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 23:11:27,370 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:11:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 23:11:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:11:27,371 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:27,371 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:27,371 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:27,371 INFO L82 PathProgramCache]: Analyzing trace with hash 118579098, now seen corresponding path program 1 times [2018-01-24 23:11:27,371 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:27,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:27,372 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:27,372 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:27,373 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:27,391 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:27,511 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:27,511 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:11:27,511 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:27,513 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:11:27,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:11:27,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:11:27,514 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2018-01-24 23:11:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:27,619 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-01-24 23:11:27,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:11:27,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-24 23:11:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:27,621 INFO L225 Difference]: With dead ends: 42 [2018-01-24 23:11:27,621 INFO L226 Difference]: Without dead ends: 41 [2018-01-24 23:11:27,622 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:11:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-24 23:11:27,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-24 23:11:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 23:11:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 23:11:27,631 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 13 [2018-01-24 23:11:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:27,631 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 23:11:27,631 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:11:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 23:11:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 23:11:27,632 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:27,632 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:27,632 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash -539609344, now seen corresponding path program 1 times [2018-01-24 23:11:27,633 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:27,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:27,634 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:27,634 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:27,634 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:27,659 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:27,719 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:27,719 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:11:27,719 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:27,719 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:11:27,719 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:11:27,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:11:27,720 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2018-01-24 23:11:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:27,847 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-01-24 23:11:27,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:11:27,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 23:11:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:27,849 INFO L225 Difference]: With dead ends: 41 [2018-01-24 23:11:27,849 INFO L226 Difference]: Without dead ends: 40 [2018-01-24 23:11:27,850 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:11:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-24 23:11:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-24 23:11:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-24 23:11:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-01-24 23:11:27,856 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 18 [2018-01-24 23:11:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:27,856 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-01-24 23:11:27,857 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:11:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-01-24 23:11:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 23:11:27,857 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:27,858 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:27,858 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash -539609343, now seen corresponding path program 1 times [2018-01-24 23:11:27,858 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:27,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:27,859 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:27,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:27,860 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:27,878 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:27,986 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:27,986 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:11:27,986 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:27,986 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:11:27,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:11:27,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:11:27,987 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2018-01-24 23:11:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:28,283 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-01-24 23:11:28,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:11:28,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-01-24 23:11:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:28,287 INFO L225 Difference]: With dead ends: 51 [2018-01-24 23:11:28,287 INFO L226 Difference]: Without dead ends: 50 [2018-01-24 23:11:28,287 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:11:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-24 23:11:28,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-01-24 23:11:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:11:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-24 23:11:28,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2018-01-24 23:11:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:28,295 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-24 23:11:28,295 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:11:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-24 23:11:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 23:11:28,296 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:28,296 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:28,297 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 451979505, now seen corresponding path program 1 times [2018-01-24 23:11:28,297 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:28,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:28,298 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:28,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:28,298 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:28,320 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:28,436 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:28,436 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:11:28,436 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:28,437 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:11:28,437 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:11:28,437 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:11:28,437 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2018-01-24 23:11:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:28,563 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-24 23:11:28,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:11:28,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-24 23:11:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:28,565 INFO L225 Difference]: With dead ends: 50 [2018-01-24 23:11:28,565 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 23:11:28,565 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:11:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 23:11:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2018-01-24 23:11:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 23:11:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2018-01-24 23:11:28,573 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2018-01-24 23:11:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:28,573 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2018-01-24 23:11:28,573 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:11:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2018-01-24 23:11:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 23:11:28,574 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:28,574 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:28,575 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:28,575 INFO L82 PathProgramCache]: Analyzing trace with hash 451979504, now seen corresponding path program 1 times [2018-01-24 23:11:28,575 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:28,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:28,576 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:28,576 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:28,577 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:28,593 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:28,719 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:28,719 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:11:28,719 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:28,720 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:11:28,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:11:28,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:11:28,720 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2018-01-24 23:11:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:28,921 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-01-24 23:11:28,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:11:28,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-24 23:11:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:28,922 INFO L225 Difference]: With dead ends: 44 [2018-01-24 23:11:28,922 INFO L226 Difference]: Without dead ends: 43 [2018-01-24 23:11:28,923 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:11:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-24 23:11:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-24 23:11:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 23:11:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-24 23:11:28,928 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 19 [2018-01-24 23:11:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:28,929 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-24 23:11:28,929 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:11:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-24 23:11:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:11:28,930 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:28,930 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:28,930 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1872127023, now seen corresponding path program 1 times [2018-01-24 23:11:28,931 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:28,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:28,932 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:28,932 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:28,932 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:28,949 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:29,003 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:29,003 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:11:29,003 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:29,003 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:11:29,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:11:29,004 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:11:29,004 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 6 states. [2018-01-24 23:11:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:29,089 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2018-01-24 23:11:29,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 23:11:29,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-24 23:11:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:29,091 INFO L225 Difference]: With dead ends: 101 [2018-01-24 23:11:29,091 INFO L226 Difference]: Without dead ends: 77 [2018-01-24 23:11:29,091 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 [2018-01-24 23:11:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-24 23:11:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2018-01-24 23:11:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-24 23:11:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2018-01-24 23:11:29,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 23 [2018-01-24 23:11:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:29,101 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2018-01-24 23:11:29,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:11:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2018-01-24 23:11:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:11:29,102 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:29,102 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:29,102 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 851058669, now seen corresponding path program 1 times [2018-01-24 23:11:29,103 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:29,104 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:29,104 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:29,104 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:29,104 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:29,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:29,264 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:11:29,264 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 23:11:29,264 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:11:29,265 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 23:11:29,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 23:11:29,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 23:11:29,265 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 10 states. [2018-01-24 23:11:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:11:29,623 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2018-01-24 23:11:29,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 23:11:29,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-24 23:11:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:11:29,625 INFO L225 Difference]: With dead ends: 150 [2018-01-24 23:11:29,625 INFO L226 Difference]: Without dead ends: 121 [2018-01-24 23:11:29,626 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-01-24 23:11:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-24 23:11:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2018-01-24 23:11:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-24 23:11:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2018-01-24 23:11:29,640 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 23 [2018-01-24 23:11:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:11:29,641 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2018-01-24 23:11:29,641 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 23:11:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2018-01-24 23:11:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 23:11:29,643 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:11:29,643 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:11:29,644 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:11:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash -737289233, now seen corresponding path program 1 times [2018-01-24 23:11:29,644 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:11:29,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:29,645 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:11:29,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:11:29,645 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:11:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:11:29,663 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:11:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:11:29,918 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:11:29,918 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:11:29,919 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-24 23:11:29,921 INFO L201 CegarAbsIntRunner]: [0], [4], [10], [11], [13], [14], [39], [45], [46], [50], [55], [61], [63], [64], [65], [66], [67], [78], [79], [80], [82] [2018-01-24 23:11:29,969 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:11:29,969 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