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_mostprecise.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 19:47:13,048 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 19:47:13,050 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 19:47:13,065 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 19:47:13,066 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 19:47:13,067 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 19:47:13,068 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 19:47:13,069 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 19:47:13,071 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 19:47:13,072 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 19:47:13,073 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 19:47:13,073 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 19:47:13,074 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 19:47:13,076 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 19:47:13,076 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 19:47:13,079 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 19:47:13,081 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 19:47:13,083 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 19:47:13,084 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 19:47:13,086 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 19:47:13,088 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 19:47:13,088 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 19:47:13,089 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 19:47:13,090 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 19:47:13,090 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 19:47:13,092 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 19:47:13,092 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 19:47:13,093 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 19:47:13,093 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 19:47:13,093 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 19:47:13,094 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 19:47:13,094 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_mostprecise.epf [2018-01-24 19:47:13,103 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 19:47:13,104 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 19:47:13,104 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 19:47:13,104 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 19:47:13,105 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 19:47:13,105 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 19:47:13,105 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 19:47:13,105 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 19:47:13,105 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 19:47:13,106 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 19:47:13,106 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 19:47:13,107 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 19:47:13,107 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 19:47:13,107 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 19:47:13,107 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 19:47:13,107 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 19:47:13,107 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 19:47:13,108 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 19:47:13,108 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 19:47:13,108 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 19:47:13,108 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 19:47:13,108 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 19:47:13,108 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 19:47:13,109 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 19:47:13,109 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 19:47:13,109 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 19:47:13,109 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 19:47:13,109 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 19:47:13,109 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 19:47:13,110 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 19:47:13,110 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 19:47:13,142 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 19:47:13,152 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 19:47:13,156 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 19:47:13,157 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 19:47:13,157 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 19:47:13,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-24 19:47:13,309 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 19:47:13,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 19:47:13,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 19:47:13,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 19:47:13,320 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 19:47:13,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386958ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13, skipping insertion in model container [2018-01-24 19:47:13,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,338 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 19:47:13,376 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 19:47:13,493 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 19:47:13,514 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 19:47:13,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13 WrapperNode [2018-01-24 19:47:13,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 19:47:13,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 19:47:13,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 19:47:13,523 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 19:47:13,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (1/1) ... [2018-01-24 19:47:13,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 19:47:13,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 19:47:13,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 19:47:13,559 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 19:47:13,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (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 19:47:13,606 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 19:47:13,606 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 19:47:13,606 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncpy [2018-01-24 19:47:13,606 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 19:47:13,606 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 19:47:13,606 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 19:47:13,606 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncpy [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 19:47:13,607 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 19:47:13,815 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 19:47:13,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 07:47:13 BoogieIcfgContainer [2018-01-24 19:47:13,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 19:47:13,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 19:47:13,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 19:47:13,818 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 19:47:13,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 07:47:13" (1/3) ... [2018-01-24 19:47:13,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141c791e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 07:47:13, skipping insertion in model container [2018-01-24 19:47:13,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 07:47:13" (2/3) ... [2018-01-24 19:47:13,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@141c791e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 07:47:13, skipping insertion in model container [2018-01-24 19:47:13,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 07:47:13" (3/3) ... [2018-01-24 19:47:13,821 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-24 19:47:13,830 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 19:47:13,835 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-24 19:47:13,871 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 19:47:13,872 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 19:47:13,872 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 19:47:13,872 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 19:47:13,872 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 19:47:13,872 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 19:47:13,873 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 19:47:13,873 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 19:47:13,874 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 19:47:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-01-24 19:47:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 19:47:13,902 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:13,903 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:47:13,903 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 118579097, now seen corresponding path program 1 times [2018-01-24 19:47:13,912 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:13,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:13,972 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:13,972 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:13,972 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:14,027 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:14,101 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 19:47:14,104 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:14,104 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 19:47:14,104 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:14,107 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 19:47:14,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 19:47:14,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 19:47:14,124 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2018-01-24 19:47:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:14,315 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-01-24 19:47:14,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 19:47:14,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 19:47:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:14,326 INFO L225 Difference]: With dead ends: 59 [2018-01-24 19:47:14,326 INFO L226 Difference]: Without dead ends: 42 [2018-01-24 19:47:14,329 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 19:47:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-24 19:47:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-24 19:47:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-24 19:47:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-24 19:47:14,361 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 13 [2018-01-24 19:47:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:14,362 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-24 19:47:14,362 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 19:47:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-24 19:47:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 19:47:14,362 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:14,362 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 19:47:14,363 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash 118579098, now seen corresponding path program 1 times [2018-01-24 19:47:14,363 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:14,364 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:14,364 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:14,364 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:14,364 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:14,383 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:14,510 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 19:47:14,511 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:14,511 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 19:47:14,511 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:14,513 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 19:47:14,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 19:47:14,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 19:47:14,514 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2018-01-24 19:47:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:14,584 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-01-24 19:47:14,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 19:47:14,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-24 19:47:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:14,586 INFO L225 Difference]: With dead ends: 42 [2018-01-24 19:47:14,586 INFO L226 Difference]: Without dead ends: 41 [2018-01-24 19:47:14,587 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 19:47:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-24 19:47:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-24 19:47:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-24 19:47:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-24 19:47:14,594 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 13 [2018-01-24 19:47:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:14,594 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-24 19:47:14,594 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 19:47:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-24 19:47:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 19:47:14,595 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:14,596 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 19:47:14,596 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash -539609344, now seen corresponding path program 1 times [2018-01-24 19:47:14,596 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:14,597 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:14,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:14,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:14,598 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:14,621 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:14,677 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 19:47:14,677 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:14,678 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 19:47:14,678 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:14,678 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 19:47:14,678 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 19:47:14,678 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 19:47:14,678 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2018-01-24 19:47:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:14,801 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-01-24 19:47:14,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 19:47:14,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-24 19:47:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:14,802 INFO L225 Difference]: With dead ends: 41 [2018-01-24 19:47:14,802 INFO L226 Difference]: Without dead ends: 40 [2018-01-24 19:47:14,803 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 19:47:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-24 19:47:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-24 19:47:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-24 19:47:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-01-24 19:47:14,809 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 18 [2018-01-24 19:47:14,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:14,809 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-01-24 19:47:14,809 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 19:47:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-01-24 19:47:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 19:47:14,810 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:14,810 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 19:47:14,810 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:14,811 INFO L82 PathProgramCache]: Analyzing trace with hash -539609343, now seen corresponding path program 1 times [2018-01-24 19:47:14,811 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:14,812 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:14,812 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:14,812 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:14,812 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:14,832 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:14,950 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 19:47:14,951 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:14,951 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 19:47:14,951 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:14,951 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 19:47:14,952 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 19:47:14,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-24 19:47:14,952 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2018-01-24 19:47:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:15,111 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-01-24 19:47:15,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 19:47:15,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-01-24 19:47:15,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:15,114 INFO L225 Difference]: With dead ends: 51 [2018-01-24 19:47:15,114 INFO L226 Difference]: Without dead ends: 50 [2018-01-24 19:47:15,115 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 19:47:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-24 19:47:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-01-24 19:47:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 19:47:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-24 19:47:15,121 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2018-01-24 19:47:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:15,122 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-24 19:47:15,122 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 19:47:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-24 19:47:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 19:47:15,123 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:15,123 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 19:47:15,123 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash 451979505, now seen corresponding path program 1 times [2018-01-24 19:47:15,124 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:15,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,125 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:15,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,125 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:15,149 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:15,287 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 19:47:15,287 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:15,288 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 19:47:15,288 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:15,288 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 19:47:15,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 19:47:15,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-24 19:47:15,289 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2018-01-24 19:47:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:15,415 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-24 19:47:15,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 19:47:15,416 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-24 19:47:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:15,417 INFO L225 Difference]: With dead ends: 50 [2018-01-24 19:47:15,417 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 19:47:15,417 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 19:47:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 19:47:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2018-01-24 19:47:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 19:47:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2018-01-24 19:47:15,424 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2018-01-24 19:47:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:15,425 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2018-01-24 19:47:15,425 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 19:47:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2018-01-24 19:47:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 19:47:15,426 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:15,426 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 19:47:15,426 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:15,426 INFO L82 PathProgramCache]: Analyzing trace with hash 451979504, now seen corresponding path program 1 times [2018-01-24 19:47:15,427 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:15,428 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,428 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:15,428 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,428 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:15,445 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:15,539 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 19:47:15,540 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:15,540 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 19:47:15,540 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:15,540 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 19:47:15,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 19:47:15,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-24 19:47:15,541 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2018-01-24 19:47:15,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:15,661 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-01-24 19:47:15,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 19:47:15,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-24 19:47:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:15,662 INFO L225 Difference]: With dead ends: 44 [2018-01-24 19:47:15,663 INFO L226 Difference]: Without dead ends: 43 [2018-01-24 19:47:15,663 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-01-24 19:47:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-24 19:47:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-24 19:47:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-24 19:47:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-24 19:47:15,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 19 [2018-01-24 19:47:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:15,668 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-24 19:47:15,668 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 19:47:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-24 19:47:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 19:47:15,669 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:15,669 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 19:47:15,669 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1872127023, now seen corresponding path program 1 times [2018-01-24 19:47:15,669 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:15,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,670 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:15,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,670 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:15,684 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:15,733 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 19:47:15,733 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:15,733 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 19:47:15,734 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:15,734 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 19:47:15,734 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 19:47:15,734 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 19:47:15,735 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 6 states. [2018-01-24 19:47:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:15,807 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2018-01-24 19:47:15,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 19:47:15,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-24 19:47:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:15,808 INFO L225 Difference]: With dead ends: 101 [2018-01-24 19:47:15,809 INFO L226 Difference]: Without dead ends: 77 [2018-01-24 19:47:15,809 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 19:47:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-24 19:47:15,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2018-01-24 19:47:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-24 19:47:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2018-01-24 19:47:15,820 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 23 [2018-01-24 19:47:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:15,820 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2018-01-24 19:47:15,820 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 19:47:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2018-01-24 19:47:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 19:47:15,822 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:15,822 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 19:47:15,822 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash 851058669, now seen corresponding path program 1 times [2018-01-24 19:47:15,822 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:15,823 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,824 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:15,824 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:15,824 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:15,841 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:15,996 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 19:47:15,996 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 19:47:15,996 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 19:47:15,996 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 19:47:15,997 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 19:47:15,997 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 19:47:15,997 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-24 19:47:15,997 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 10 states. [2018-01-24 19:47:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 19:47:16,212 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2018-01-24 19:47:16,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 19:47:16,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-24 19:47:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 19:47:16,214 INFO L225 Difference]: With dead ends: 150 [2018-01-24 19:47:16,214 INFO L226 Difference]: Without dead ends: 121 [2018-01-24 19:47:16,215 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-01-24 19:47:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-24 19:47:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2018-01-24 19:47:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-24 19:47:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2018-01-24 19:47:16,226 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 23 [2018-01-24 19:47:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 19:47:16,226 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2018-01-24 19:47:16,227 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 19:47:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2018-01-24 19:47:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 19:47:16,228 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 19:47:16,228 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 19:47:16,228 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 19:47:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash -737289233, now seen corresponding path program 1 times [2018-01-24 19:47:16,229 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 19:47:16,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:16,230 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 19:47:16,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 19:47:16,230 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 19:47:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 19:47:16,245 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 19:47:16,421 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 19:47:16,422 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 19:47:16,422 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 19:47:16,423 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-24 19:47:16,425 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 19:47:16,467 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 19:47:16,467 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