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/cstrncpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:35:48,505 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:35:48,507 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:35:48,528 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:35:48,529 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:35:48,532 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:35:48,533 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:35:48,548 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:35:48,550 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:35:48,551 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:35:48,552 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:35:48,552 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:35:48,554 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:35:48,555 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:35:48,556 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:35:48,559 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:35:48,561 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:35:48,564 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:35:48,565 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:35:48,567 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:35:48,569 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 02:35:48,570 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 02:35:48,570 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 02:35:48,571 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 02:35:48,572 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 02:35:48,574 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 02:35:48,574 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 02:35:48,575 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 02:35:48,575 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 02:35:48,575 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:35:48,576 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:35:48,576 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 02:35:48,586 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:35:48,587 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:35:48,587 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:35:48,588 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:35:48,588 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:35:48,588 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:35:48,588 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:35:48,588 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:35:48,588 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:35:48,589 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:35:48,589 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:35:48,589 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:35:48,589 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:35:48,589 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:35:48,590 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:35:48,590 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:35:48,590 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:35:48,590 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:35:48,590 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:35:48,590 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:35:48,590 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:35:48,591 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:35:48,591 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:35:48,591 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:35:48,591 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:35:48,591 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:35:48,592 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:35:48,592 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:35:48,592 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:35:48,592 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:35:48,592 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:35:48,592 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:35:48,592 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:35:48,593 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:35:48,593 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:35:48,594 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:35:48,594 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:35:48,630 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:35:48,654 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:35:48,658 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:35:48,660 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:35:48,660 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:35:48,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:35:48,853 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:35:48,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:35:48,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:35:48,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:35:48,866 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:35:48,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:35:48" (1/1) ... [2018-01-25 02:35:48,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a59f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:48, skipping insertion in model container [2018-01-25 02:35:48,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:35:48" (1/1) ... [2018-01-25 02:35:48,884 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:35:48,923 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:35:49,047 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:35:49,069 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:35:49,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49 WrapperNode [2018-01-25 02:35:49,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:35:49,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:35:49,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:35:49,078 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:35:49,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (1/1) ... [2018-01-25 02:35:49,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:35:49,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:35:49,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:35:49,116 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:35:49,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (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 02:35:49,167 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:35:49,168 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:35:49,168 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrncpy [2018-01-25 02:35:49,168 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:35:49,168 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:35:49,168 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:35:49,168 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:35:49,168 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:35:49,168 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:35:49,169 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:35:49,169 INFO L128 BoogieDeclarations]: Found specification of procedure cstrncpy [2018-01-25 02:35:49,169 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:35:49,169 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:35:49,169 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:35:49,385 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:35:49,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:35:49 BoogieIcfgContainer [2018-01-25 02:35:49,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:35:49,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:35:49,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:35:49,388 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:35:49,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:35:48" (1/3) ... [2018-01-25 02:35:49,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67507f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:35:49, skipping insertion in model container [2018-01-25 02:35:49,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:35:49" (2/3) ... [2018-01-25 02:35:49,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67507f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:35:49, skipping insertion in model container [2018-01-25 02:35:49,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:35:49" (3/3) ... [2018-01-25 02:35:49,393 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-25 02:35:49,400 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:35:49,406 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-25 02:35:49,455 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:35:49,455 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:35:49,455 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:35:49,456 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:35:49,456 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:35:49,456 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:35:49,456 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:35:49,456 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:35:49,457 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:35:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-01-25 02:35:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 02:35:49,487 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:49,488 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:35:49,488 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 118579097, now seen corresponding path program 1 times [2018-01-25 02:35:49,496 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:49,547 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:49,547 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:49,547 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:49,547 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:49,609 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:49,710 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 02:35:49,713 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:49,714 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 02:35:49,714 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:49,717 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:35:49,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:35:49,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:35:49,734 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2018-01-25 02:35:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:49,931 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-01-25 02:35:49,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:35:49,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 02:35:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:49,962 INFO L225 Difference]: With dead ends: 59 [2018-01-25 02:35:49,962 INFO L226 Difference]: Without dead ends: 42 [2018-01-25 02:35:49,970 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 02:35:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-01-25 02:35:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-01-25 02:35:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-01-25 02:35:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2018-01-25 02:35:50,011 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 13 [2018-01-25 02:35:50,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:50,012 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2018-01-25 02:35:50,012 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:35:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2018-01-25 02:35:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 02:35:50,012 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:50,013 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:35:50,013 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash 118579098, now seen corresponding path program 1 times [2018-01-25 02:35:50,013 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:50,014 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,014 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:50,014 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,015 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:50,036 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:50,174 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 02:35:50,174 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:50,174 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:35:50,174 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:50,179 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 02:35:50,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 02:35:50,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-25 02:35:50,180 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2018-01-25 02:35:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:50,315 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-01-25 02:35:50,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:35:50,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-25 02:35:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:50,317 INFO L225 Difference]: With dead ends: 42 [2018-01-25 02:35:50,317 INFO L226 Difference]: Without dead ends: 41 [2018-01-25 02:35:50,318 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 [2018-01-25 02:35:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-25 02:35:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-25 02:35:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-25 02:35:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-01-25 02:35:50,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 13 [2018-01-25 02:35:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:50,325 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-01-25 02:35:50,325 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 02:35:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-01-25 02:35:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:35:50,326 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:50,327 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 02:35:50,327 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash -539609344, now seen corresponding path program 1 times [2018-01-25 02:35:50,327 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:50,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,329 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:50,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,329 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:50,348 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:50,407 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 02:35:50,408 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:50,408 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 02:35:50,408 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:50,408 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:35:50,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:35:50,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:35:50,409 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 6 states. [2018-01-25 02:35:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:50,541 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-01-25 02:35:50,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 02:35:50,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-01-25 02:35:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:50,542 INFO L225 Difference]: With dead ends: 41 [2018-01-25 02:35:50,542 INFO L226 Difference]: Without dead ends: 40 [2018-01-25 02:35:50,543 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 [2018-01-25 02:35:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-25 02:35:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-25 02:35:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-25 02:35:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-01-25 02:35:50,549 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 18 [2018-01-25 02:35:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:50,550 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-01-25 02:35:50,550 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:35:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-01-25 02:35:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:35:50,551 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:50,551 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 02:35:50,551 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash -539609343, now seen corresponding path program 1 times [2018-01-25 02:35:50,551 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:50,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,553 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:50,553 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,553 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:50,572 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:50,691 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 02:35:50,691 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:50,714 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-25 02:35:50,714 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:50,715 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 02:35:50,715 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 02:35:50,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-25 02:35:50,715 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2018-01-25 02:35:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:50,870 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-01-25 02:35:50,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 02:35:50,871 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-01-25 02:35:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:50,875 INFO L225 Difference]: With dead ends: 51 [2018-01-25 02:35:50,875 INFO L226 Difference]: Without dead ends: 50 [2018-01-25 02:35:50,876 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 [2018-01-25 02:35:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-01-25 02:35:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-01-25 02:35:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-25 02:35:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-25 02:35:50,885 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2018-01-25 02:35:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:50,885 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-25 02:35:50,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 02:35:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-25 02:35:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:35:50,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:50,887 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 02:35:50,887 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 451979505, now seen corresponding path program 1 times [2018-01-25 02:35:50,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:50,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,889 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:50,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:50,889 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:50,914 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:51,049 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 02:35:51,049 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:51,050 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-25 02:35:51,050 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:51,050 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 02:35:51,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 02:35:51,050 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-25 02:35:51,051 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 9 states. [2018-01-25 02:35:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:51,165 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-25 02:35:51,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-25 02:35:51,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-25 02:35:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:51,167 INFO L225 Difference]: With dead ends: 50 [2018-01-25 02:35:51,167 INFO L226 Difference]: Without dead ends: 49 [2018-01-25 02:35:51,167 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 [2018-01-25 02:35:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-25 02:35:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2018-01-25 02:35:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-25 02:35:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2018-01-25 02:35:51,172 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 19 [2018-01-25 02:35:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:51,173 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2018-01-25 02:35:51,173 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 02:35:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2018-01-25 02:35:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-25 02:35:51,174 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:51,174 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 02:35:51,174 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash 451979504, now seen corresponding path program 1 times [2018-01-25 02:35:51,174 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:51,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:51,175 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:51,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:51,176 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:51,197 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:35:51,287 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:51,287 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-25 02:35:51,288 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:51,288 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-25 02:35:51,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-25 02:35:51,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-25 02:35:51,289 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2018-01-25 02:35:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:51,404 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-01-25 02:35:51,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 02:35:51,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-01-25 02:35:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:51,405 INFO L225 Difference]: With dead ends: 44 [2018-01-25 02:35:51,405 INFO L226 Difference]: Without dead ends: 43 [2018-01-25 02:35:51,406 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 [2018-01-25 02:35:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-25 02:35:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-25 02:35:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-25 02:35:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-25 02:35:51,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 19 [2018-01-25 02:35:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:51,415 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-25 02:35:51,415 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-25 02:35:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-25 02:35:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:35:51,416 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:51,416 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] [2018-01-25 02:35:51,416 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1872127023, now seen corresponding path program 1 times [2018-01-25 02:35:51,417 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:51,418 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:51,421 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:51,421 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:51,421 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:51,435 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:35:51,489 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:51,489 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-25 02:35:51,489 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:51,490 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:35:51,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:35:51,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:35:51,490 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 6 states. [2018-01-25 02:35:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:51,613 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2018-01-25 02:35:51,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-25 02:35:51,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-25 02:35:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:51,624 INFO L225 Difference]: With dead ends: 101 [2018-01-25 02:35:51,625 INFO L226 Difference]: Without dead ends: 77 [2018-01-25 02:35:51,625 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-25 02:35:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-25 02:35:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2018-01-25 02:35:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-25 02:35:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2018-01-25 02:35:51,634 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 23 [2018-01-25 02:35:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:51,634 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2018-01-25 02:35:51,635 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:35:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2018-01-25 02:35:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:35:51,639 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:51,639 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] [2018-01-25 02:35:51,639 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 851058669, now seen corresponding path program 1 times [2018-01-25 02:35:51,640 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:51,642 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:51,642 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:51,642 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:51,642 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:51,667 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:51,869 WARN L146 SmtUtils]: Spent 102ms on a formula simplification. DAG size of input: 17 DAG size of output 9 [2018-01-25 02:35:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:35:51,902 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:35:51,902 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-25 02:35:51,902 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:35:51,902 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-25 02:35:51,902 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-25 02:35:51,902 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-01-25 02:35:51,903 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 10 states. [2018-01-25 02:35:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:35:52,117 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2018-01-25 02:35:52,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-25 02:35:52,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-01-25 02:35:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:35:52,120 INFO L225 Difference]: With dead ends: 150 [2018-01-25 02:35:52,120 INFO L226 Difference]: Without dead ends: 121 [2018-01-25 02:35:52,121 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 [2018-01-25 02:35:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-01-25 02:35:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2018-01-25 02:35:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-25 02:35:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2018-01-25 02:35:52,133 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 23 [2018-01-25 02:35:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:35:52,133 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2018-01-25 02:35:52,133 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-25 02:35:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2018-01-25 02:35:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 02:35:52,134 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:35:52,134 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] [2018-01-25 02:35:52,134 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrncpyErr3RequiresViolation, cstrncpyErr5RequiresViolation, cstrncpyErr4RequiresViolation, cstrncpyErr2RequiresViolation, cstrncpyErr0RequiresViolation, cstrncpyErr1RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-25 02:35:52,134 INFO L82 PathProgramCache]: Analyzing trace with hash -737289233, now seen corresponding path program 1 times [2018-01-25 02:35:52,134 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:35:52,135 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:52,135 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:35:52,135 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:35:52,135 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:35:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:35:52,151 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:35:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:35:52,322 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 02:35:52,322 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 02:35:52,324 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-01-25 02:35:52,326 INFO L201 CegarAbsIntRunner]: [0], [4], [10], [11], [13], [14], [39], [45], [46], [50], [55], [61], [63], [64], [65], [66], [67], [78], [79], [80], [82] [2018-01-25 02:35:52,374 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 02:35:52,375 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