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/list-ext-properties/simple-ext_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 03:19:14,871 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 03:19:14,872 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 03:19:14,887 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 03:19:14,888 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 03:19:14,889 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 03:19:14,890 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 03:19:14,892 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 03:19:14,894 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 03:19:14,895 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 03:19:14,895 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 03:19:14,896 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 03:19:14,896 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 03:19:14,897 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 03:19:14,898 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 03:19:14,900 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 03:19:14,902 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 03:19:14,905 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 03:19:14,906 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 03:19:14,907 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 03:19:14,910 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-25 03:19:14,915 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 03:19:14,916 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 03:19:14,917 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 03:19:14,927 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 03:19:14,927 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 03:19:14,928 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 03:19:14,928 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 03:19:14,928 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 03:19:14,929 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 03:19:14,929 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 03:19:14,929 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 03:19:14,929 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 03:19:14,930 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 03:19:14,930 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 03:19:14,930 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 03:19:14,930 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 03:19:14,931 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 03:19:14,931 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 03:19:14,931 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 03:19:14,931 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 03:19:14,931 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 03:19:14,931 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 03:19:14,932 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 03:19:14,932 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 03:19:14,932 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 03:19:14,932 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 03:19:14,932 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 03:19:14,933 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 03:19:14,933 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 03:19:14,933 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 03:19:14,933 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 03:19:14,933 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 03:19:14,934 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 03:19:14,934 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 03:19:14,934 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 03:19:14,934 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 03:19:14,934 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 03:19:14,935 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 03:19:14,935 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 03:19:14,936 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 03:19:14,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 03:19:14,985 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 03:19:14,989 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 03:19:14,991 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 03:19:14,991 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 03:19:14,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/simple-ext_1_true-valid-memsafety.i [2018-01-25 03:19:15,175 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 03:19:15,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 03:19:15,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 03:19:15,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 03:19:15,192 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 03:19:15,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a76578b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15, skipping insertion in model container [2018-01-25 03:19:15,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,218 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:19:15,259 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 03:19:15,376 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:19:15,394 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 03:19:15,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15 WrapperNode [2018-01-25 03:19:15,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 03:19:15,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 03:19:15,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 03:19:15,403 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 03:19:15,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (1/1) ... [2018-01-25 03:19:15,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 03:19:15,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 03:19:15,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 03:19:15,441 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 03:19:15,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (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 03:19:15,491 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 03:19:15,491 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 03:19:15,491 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-25 03:19:15,491 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-25 03:19:15,492 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-25 03:19:15,493 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-25 03:19:15,493 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-25 03:19:15,493 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 03:19:15,493 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 03:19:15,493 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 03:19:15,770 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 03:19:15,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:19:15 BoogieIcfgContainer [2018-01-25 03:19:15,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 03:19:15,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 03:19:15,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 03:19:15,774 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 03:19:15,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 03:19:15" (1/3) ... [2018-01-25 03:19:15,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e6068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:19:15, skipping insertion in model container [2018-01-25 03:19:15,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 03:19:15" (2/3) ... [2018-01-25 03:19:15,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e6068b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 03:19:15, skipping insertion in model container [2018-01-25 03:19:15,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 03:19:15" (3/3) ... [2018-01-25 03:19:15,779 INFO L105 eAbstractionObserver]: Analyzing ICFG simple-ext_1_true-valid-memsafety.i [2018-01-25 03:19:15,786 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 03:19:15,794 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2018-01-25 03:19:15,842 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 03:19:15,843 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 03:19:15,843 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 03:19:15,843 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 03:19:15,843 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 03:19:15,844 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 03:19:15,844 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 03:19:15,844 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 03:19:15,845 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 03:19:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-25 03:19:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-25 03:19:15,873 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:19:15,874 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:19:15,875 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 03:19:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1616503521, now seen corresponding path program 1 times [2018-01-25 03:19:15,881 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:19:15,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:15,923 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:19:15,923 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:15,924 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:19:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:19:15,975 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:19:16,006 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 03:19:16,008 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:19:16,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 03:19:16,009 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:19:16,011 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 03:19:16,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 03:19:16,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 03:19:16,025 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-25 03:19:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:19:16,129 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2018-01-25 03:19:16,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 03:19:16,131 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-25 03:19:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:19:16,139 INFO L225 Difference]: With dead ends: 100 [2018-01-25 03:19:16,139 INFO L226 Difference]: Without dead ends: 57 [2018-01-25 03:19:16,142 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 03:19:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-25 03:19:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-25 03:19:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-25 03:19:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-01-25 03:19:16,170 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 11 [2018-01-25 03:19:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:19:16,171 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-01-25 03:19:16,171 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 03:19:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-01-25 03:19:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 03:19:16,172 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:19:16,172 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:19:16,172 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 03:19:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2050647052, now seen corresponding path program 1 times [2018-01-25 03:19:16,173 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:19:16,174 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,174 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:19:16,174 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,174 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:19:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:19:16,196 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:19:16,277 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 03:19:16,278 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:19:16,278 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:19:16,278 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:19:16,280 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:19:16,280 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:19:16,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:19:16,281 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 5 states. [2018-01-25 03:19:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:19:16,520 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2018-01-25 03:19:16,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-25 03:19:16,520 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 03:19:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:19:16,521 INFO L225 Difference]: With dead ends: 84 [2018-01-25 03:19:16,521 INFO L226 Difference]: Without dead ends: 75 [2018-01-25 03:19:16,522 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:19:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-25 03:19:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2018-01-25 03:19:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-25 03:19:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2018-01-25 03:19:16,531 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 14 [2018-01-25 03:19:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:19:16,532 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2018-01-25 03:19:16,532 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:19:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2018-01-25 03:19:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-25 03:19:16,532 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:19:16,532 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:19:16,533 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 03:19:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2050647053, now seen corresponding path program 1 times [2018-01-25 03:19:16,533 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:19:16,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,534 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:19:16,534 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,534 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:19:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:19:16,547 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:19:16,616 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 03:19:16,617 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:19:16,617 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 03:19:16,617 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:19:16,617 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:19:16,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:19:16,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:19:16,618 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 5 states. [2018-01-25 03:19:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:19:16,784 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2018-01-25 03:19:16,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:19:16,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-25 03:19:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:19:16,786 INFO L225 Difference]: With dead ends: 91 [2018-01-25 03:19:16,786 INFO L226 Difference]: Without dead ends: 82 [2018-01-25 03:19:16,786 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:19:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-25 03:19:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2018-01-25 03:19:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-25 03:19:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-01-25 03:19:16,797 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 14 [2018-01-25 03:19:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:19:16,797 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-01-25 03:19:16,797 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:19:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-01-25 03:19:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-25 03:19:16,799 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:19:16,799 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 03:19:16,799 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 03:19:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1493222104, now seen corresponding path program 1 times [2018-01-25 03:19:16,799 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:19:16,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,801 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:19:16,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,801 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:19:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:19:16,819 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:19:16,862 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 03:19:16,863 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 03:19:16,863 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 03:19:16,863 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 03:19:16,863 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-25 03:19:16,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-25 03:19:16,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-25 03:19:16,864 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 5 states. [2018-01-25 03:19:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 03:19:16,946 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2018-01-25 03:19:16,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 03:19:16,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-01-25 03:19:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 03:19:16,947 INFO L225 Difference]: With dead ends: 96 [2018-01-25 03:19:16,948 INFO L226 Difference]: Without dead ends: 78 [2018-01-25 03:19:16,948 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-25 03:19:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-25 03:19:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-01-25 03:19:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-25 03:19:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-01-25 03:19:16,959 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 23 [2018-01-25 03:19:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 03:19:16,959 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-01-25 03:19:16,959 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-25 03:19:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-01-25 03:19:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-25 03:19:16,961 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 03:19:16,961 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, 1, 1] [2018-01-25 03:19:16,961 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr9RequiresViolation, mainErr18EnsuresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation]=== [2018-01-25 03:19:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -458760131, now seen corresponding path program 1 times [2018-01-25 03:19:16,961 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 03:19:16,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,963 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 03:19:16,963 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 03:19:16,963 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 03:19:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 03:19:16,988 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 03:19:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 03:19:17,139 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-25 03:19:17,139 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-25 03:19:17,140 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-01-25 03:19:17,142 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [9], [13], [15], [18], [24], [49], [52], [55], [59], [65], [66], [67], [75], [77], [80], [113], [114], [122], [123], [124] [2018-01-25 03:19:17,195 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-25 03:19:17,195 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