java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:42:55,529 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:42:55,531 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:42:55,548 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:42:55,548 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:42:55,549 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:42:55,550 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:42:55,552 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:42:55,555 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:42:55,556 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:42:55,557 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:42:55,557 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:42:55,558 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:42:55,559 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:42:55,560 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:42:55,563 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:42:55,565 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:42:55,567 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:42:55,569 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:42:55,570 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:42:55,573 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 02:42:55,573 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 02:42:55,573 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 02:42:55,574 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 02:42:55,575 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 02:42:55,577 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 02:42:55,577 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 02:42:55,578 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 02:42:55,578 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 02:42:55,578 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:42:55,579 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:42:55,580 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-25 02:42:55,590 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:42:55,590 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:42:55,591 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:42:55,591 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:42:55,592 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:42:55,592 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:42:55,592 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:42:55,592 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:42:55,592 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:42:55,593 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:42:55,593 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:42:55,593 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:42:55,594 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:42:55,594 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:42:55,594 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:42:55,594 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:42:55,594 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:42:55,594 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:42:55,595 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:42:55,595 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:42:55,595 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:42:55,595 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:42:55,595 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:42:55,596 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:42:55,596 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:42:55,596 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:42:55,596 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:42:55,596 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:42:55,596 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:42:55,597 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:42:55,597 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:42:55,597 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:42:55,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:42:55,597 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:42:55,598 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:42:55,599 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:42:55,599 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:42:55,636 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:42:55,650 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:42:55,655 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:42:55,656 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:42:55,657 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:42:55,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:42:55,850 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:42:55,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:42:55,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:42:55,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:42:55,865 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:42:55,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:42:55" (1/1) ... [2018-01-25 02:42:55,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96a551d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:55, skipping insertion in model container [2018-01-25 02:42:55,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:42:55" (1/1) ... [2018-01-25 02:42:55,884 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:42:55,934 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:42:56,068 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:42:56,084 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:42:56,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56 WrapperNode [2018-01-25 02:42:56,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:42:56,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:42:56,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:42:56,093 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:42:56,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... [2018-01-25 02:42:56,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:42:56,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:42:56,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:42:56,124 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:42:56,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:42:56,196 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:42:56,196 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:42:56,196 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcpy [2018-01-25 02:42:56,196 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:42:56,196 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:42:56,196 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcpy [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:42:56,197 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:42:56,447 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:42:56,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:42:56 BoogieIcfgContainer [2018-01-25 02:42:56,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:42:56,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:42:56,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:42:56,451 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:42:56,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:42:55" (1/3) ... [2018-01-25 02:42:56,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bd366f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:42:56, skipping insertion in model container [2018-01-25 02:42:56,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:42:56" (2/3) ... [2018-01-25 02:42:56,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bd366f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:42:56, skipping insertion in model container [2018-01-25 02:42:56,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:42:56" (3/3) ... [2018-01-25 02:42:56,455 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:42:56,465 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:42:56,475 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-25 02:42:56,534 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:42:56,534 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:42:56,534 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:42:56,534 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:42:56,534 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:42:56,534 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:42:56,534 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:42:56,535 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:42:56,535 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:42:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-25 02:42:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-25 02:42:56,557 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:56,558 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:56,558 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash -341828685, now seen corresponding path program 1 times [2018-01-25 02:42:56,567 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:56,618 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:56,619 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:56,619 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:56,619 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:56,669 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:56,737 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:56,737 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:42:56,737 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:56,740 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:42:56,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:42:56,751 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:42:56,753 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2018-01-25 02:42:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:56,842 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-01-25 02:42:56,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:42:56,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-01-25 02:42:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:56,940 INFO L225 Difference]: With dead ends: 57 [2018-01-25 02:42:56,940 INFO L226 Difference]: Without dead ends: 40 [2018-01-25 02:42:56,944 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:42:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-25 02:42:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-01-25 02:42:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-25 02:42:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-01-25 02:42:56,976 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2018-01-25 02:42:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:56,977 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-01-25 02:42:56,977 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:42:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-01-25 02:42:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-25 02:42:56,977 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:56,977 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:56,977 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash -341826763, now seen corresponding path program 1 times [2018-01-25 02:42:56,978 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:56,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:56,979 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:56,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:56,979 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:56,991 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:57,017 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:57,017 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 02:42:57,017 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:57,019 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-25 02:42:57,020 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-25 02:42:57,020 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 02:42:57,020 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 3 states. [2018-01-25 02:42:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:57,074 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2018-01-25 02:42:57,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-25 02:42:57,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-25 02:42:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:57,076 INFO L225 Difference]: With dead ends: 40 [2018-01-25 02:42:57,076 INFO L226 Difference]: Without dead ends: 38 [2018-01-25 02:42:57,077 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-25 02:42:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-25 02:42:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-01-25 02:42:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-25 02:42:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-01-25 02:42:57,081 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 10 [2018-01-25 02:42:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:57,082 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-01-25 02:42:57,082 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-25 02:42:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-01-25 02:42:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 02:42:57,082 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:57,082 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:57,082 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1560659641, now seen corresponding path program 1 times [2018-01-25 02:42:57,083 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:57,084 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,084 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:57,084 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,084 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:57,102 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:57,170 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:57,170 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 02:42:57,170 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:57,170 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:42:57,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:42:57,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:42:57,171 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2018-01-25 02:42:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:57,240 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-01-25 02:42:57,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:42:57,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-25 02:42:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:57,242 INFO L225 Difference]: With dead ends: 37 [2018-01-25 02:42:57,242 INFO L226 Difference]: Without dead ends: 36 [2018-01-25 02:42:57,243 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 [2018-01-25 02:42:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-25 02:42:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-25 02:42:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-25 02:42:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-25 02:42:57,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 14 [2018-01-25 02:42:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:57,251 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-25 02:42:57,252 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:42:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-25 02:42:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 02:42:57,252 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:57,252 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:57,253 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1560659640, now seen corresponding path program 1 times [2018-01-25 02:42:57,253 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:57,254 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,254 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:57,255 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,255 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:57,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:57,410 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:57,411 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:42:57,411 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:57,411 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 02:42:57,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 02:42:57,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:42:57,412 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2018-01-25 02:42:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:57,471 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-01-25 02:42:57,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:42:57,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 02:42:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:57,473 INFO L225 Difference]: With dead ends: 36 [2018-01-25 02:42:57,473 INFO L226 Difference]: Without dead ends: 35 [2018-01-25 02:42:57,474 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:42:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-25 02:42:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-25 02:42:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-25 02:42:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-01-25 02:42:57,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 14 [2018-01-25 02:42:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:57,480 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-01-25 02:42:57,480 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 02:42:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-01-25 02:42:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:42:57,481 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:57,481 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:57,481 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1121108344, now seen corresponding path program 1 times [2018-01-25 02:42:57,482 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:57,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,483 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:57,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,483 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:57,499 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:57,558 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:57,558 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:42:57,558 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:57,559 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 02:42:57,559 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 02:42:57,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:42:57,560 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2018-01-25 02:42:57,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:57,655 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-01-25 02:42:57,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 02:42:57,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-25 02:42:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:57,656 INFO L225 Difference]: With dead ends: 35 [2018-01-25 02:42:57,656 INFO L226 Difference]: Without dead ends: 34 [2018-01-25 02:42:57,657 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:42:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-25 02:42:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-25 02:42:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-25 02:42:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-01-25 02:42:57,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 18 [2018-01-25 02:42:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:57,663 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-01-25 02:42:57,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 02:42:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-01-25 02:42:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:42:57,664 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:57,664 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:57,665 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1121108343, now seen corresponding path program 1 times [2018-01-25 02:42:57,665 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:57,666 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,667 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:57,667 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,667 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:57,685 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:57,801 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:57,801 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:42:57,801 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:57,801 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:42:57,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:42:57,802 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:42:57,802 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2018-01-25 02:42:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:57,971 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-01-25 02:42:57,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 02:42:57,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-25 02:42:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:57,977 INFO L225 Difference]: With dead ends: 45 [2018-01-25 02:42:57,977 INFO L226 Difference]: Without dead ends: 44 [2018-01-25 02:42:57,978 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:42:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-25 02:42:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-01-25 02:42:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-25 02:42:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-25 02:42:57,983 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2018-01-25 02:42:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:57,984 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-25 02:42:57,984 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:42:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-25 02:42:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:42:57,985 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:57,985 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:57,985 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -394620318, now seen corresponding path program 1 times [2018-01-25 02:42:57,985 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:57,986 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,986 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:57,987 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:57,987 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:58,007 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:58,106 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:58,107 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:42:58,107 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:58,107 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:42:58,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:42:58,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:42:58,108 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2018-01-25 02:42:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:58,194 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-01-25 02:42:58,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:42:58,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-25 02:42:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:58,195 INFO L225 Difference]: With dead ends: 36 [2018-01-25 02:42:58,195 INFO L226 Difference]: Without dead ends: 35 [2018-01-25 02:42:58,196 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:42:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-25 02:42:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-25 02:42:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-25 02:42:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-01-25 02:42:58,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 19 [2018-01-25 02:42:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:58,200 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-01-25 02:42:58,200 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:42:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-01-25 02:42:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:42:58,201 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:58,201 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:58,201 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash -394620317, now seen corresponding path program 1 times [2018-01-25 02:42:58,202 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:58,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:58,203 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:58,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:58,203 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:58,217 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:58,317 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:58,318 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-25 02:42:58,318 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:58,318 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-25 02:42:58,318 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-25 02:42:58,319 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:42:58,319 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 8 states. [2018-01-25 02:42:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:58,560 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-01-25 02:42:58,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-25 02:42:58,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-01-25 02:42:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:58,561 INFO L225 Difference]: With dead ends: 42 [2018-01-25 02:42:58,561 INFO L226 Difference]: Without dead ends: 41 [2018-01-25 02:42:58,561 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-25 02:42:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-25 02:42:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2018-01-25 02:42:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-25 02:42:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-01-25 02:42:58,566 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2018-01-25 02:42:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:58,566 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-01-25 02:42:58,566 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-25 02:42:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-01-25 02:42:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:42:58,567 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:58,567 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:58,567 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash 708807622, now seen corresponding path program 1 times [2018-01-25 02:42:58,568 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:58,569 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:58,569 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:58,569 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:58,569 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:58,583 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:58,747 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:42:58,747 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-25 02:42:58,747 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:42:58,748 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 02:42:58,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 02:42:58,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:42:58,748 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2018-01-25 02:42:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:42:58,859 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-01-25 02:42:58,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-25 02:42:58,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-25 02:42:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:42:58,861 INFO L225 Difference]: With dead ends: 75 [2018-01-25 02:42:58,861 INFO L226 Difference]: Without dead ends: 58 [2018-01-25 02:42:58,861 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-01-25 02:42:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-25 02:42:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2018-01-25 02:42:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-01-25 02:42:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-01-25 02:42:58,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 23 [2018-01-25 02:42:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:42:58,871 INFO L432 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-01-25 02:42:58,871 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 02:42:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-01-25 02:42:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:42:58,872 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:42:58,872 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:42:58,872 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstrcpyErr2RequiresViolation, cstrcpyErr3RequiresViolation, cstrcpyErr0RequiresViolation, cstrcpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:42:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -312260732, now seen corresponding path program 1 times [2018-01-25 02:42:58,873 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:42:58,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:58,874 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:42:58,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:42:58,874 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:42:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:42:58,889 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:42:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:42:59,180 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:42:59,180 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 02:42:59,181 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-25 02:42:59,183 INFO L201 CegarAbsIntRunner]: [0], [4], [5], [7], [8], [15], [17], [23], [24], [28], [33], [39], [44], [45], [46], [47], [48], [49], [60], [61], [62], [64] [2018-01-25 02:42:59,233 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 02:42:59,234 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