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/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:51:25,710 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:51:25,712 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:51:25,727 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:51:25,728 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:51:25,729 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:51:25,730 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:51:25,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:51:25,734 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:51:25,735 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:51:25,736 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:51:25,736 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:51:25,737 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:51:25,738 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:51:25,739 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:51:25,741 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:51:25,744 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:51:25,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:51:25,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:51:25,748 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:51:25,750 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:51:25,755 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 02:51:25,756 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 02:51:25,756 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 02:51:25,766 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:51:25,767 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:51:25,767 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:51:25,768 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:51:25,768 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:51:25,768 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:51:25,768 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:51:25,768 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:51:25,769 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:51:25,769 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:51:25,769 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:51:25,770 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:51:25,770 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:51:25,770 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:51:25,770 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:51:25,770 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:51:25,771 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:51:25,771 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:51:25,771 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:51:25,771 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:51:25,771 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:51:25,772 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:51:25,772 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:51:25,772 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:51:25,772 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:51:25,772 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:51:25,773 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:51:25,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:51:25,773 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:51:25,773 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:51:25,773 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:51:25,774 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:51:25,774 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:51:25,774 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:51:25,774 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:51:25,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:51:25,775 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:51:25,775 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:51:25,776 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:51:25,776 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:51:25,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:51:25,824 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:51:25,828 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:51:25,830 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:51:25,830 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:51:25,831 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:51:26,003 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:51:26,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:51:26,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:51:26,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:51:26,014 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:51:26,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:51:25" (1/1) ... [2018-01-21 02:51:26,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a1b7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26, skipping insertion in model container [2018-01-21 02:51:26,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:51:25" (1/1) ... [2018-01-21 02:51:26,034 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:51:26,072 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:51:26,195 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:51:26,215 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:51:26,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26 WrapperNode [2018-01-21 02:51:26,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:51:26,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:51:26,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:51:26,224 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:51:26,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... [2018-01-21 02:51:26,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:51:26,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:51:26,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:51:26,265 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:51:26,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:51:26,327 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:51:26,327 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:51:26,327 INFO L136 BoogieDeclarations]: Found implementation of procedure cstpcpy [2018-01-21 02:51:26,327 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:51:26,328 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:51:26,328 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:51:26,328 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:51:26,328 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:51:26,328 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:51:26,328 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:51:26,329 INFO L128 BoogieDeclarations]: Found specification of procedure cstpcpy [2018-01-21 02:51:26,329 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:51:26,329 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:51:26,329 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:51:26,570 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:51:26,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:51:26 BoogieIcfgContainer [2018-01-21 02:51:26,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:51:26,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:51:26,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:51:26,574 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:51:26,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:51:25" (1/3) ... [2018-01-21 02:51:26,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62029f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:51:26, skipping insertion in model container [2018-01-21 02:51:26,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:51:26" (2/3) ... [2018-01-21 02:51:26,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62029f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:51:26, skipping insertion in model container [2018-01-21 02:51:26,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:51:26" (3/3) ... [2018-01-21 02:51:26,579 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:51:26,588 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:51:26,594 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 02:51:26,642 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:26,642 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:26,642 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:26,643 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:26,643 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:26,643 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:26,643 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:26,643 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:51:26,644 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 02:51:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:51:26,692 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:26,693 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:51:26,694 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:51:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 84570, now seen corresponding path program 1 times [2018-01-21 02:51:26,703 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:26,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:26,771 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:26,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:26,771 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:26,847 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:51:26,856 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:26,865 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:26,865 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:26,865 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:26,866 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:26,866 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:26,866 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:26,866 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:26,866 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:51:26,866 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 02:51:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 02:51:26,870 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:26,870 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:26,870 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:51:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1509367990, now seen corresponding path program 1 times [2018-01-21 02:51:26,871 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:26,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:26,872 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:26,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:26,873 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:26,914 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:27,011 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:27,011 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 02:51:27,011 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:27,015 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:51:27,119 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:51:27,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 02:51:27,122 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-21 02:51:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:27,204 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-01-21 02:51:27,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 02:51:27,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-21 02:51:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:27,221 INFO L225 Difference]: With dead ends: 55 [2018-01-21 02:51:27,221 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 02:51:27,224 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:51:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 02:51:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-01-21 02:51:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-21 02:51:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-01-21 02:51:27,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 12 [2018-01-21 02:51:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:27,265 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-01-21 02:51:27,265 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:51:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-01-21 02:51:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 02:51:27,266 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:27,267 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:27,267 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:51:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1507520948, now seen corresponding path program 1 times [2018-01-21 02:51:27,267 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:27,268 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,268 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:27,269 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,269 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:51:27,306 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:51:27,308 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:27,309 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:27,309 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:51:27,315 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:27,315 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:27,315 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:27,315 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:27,315 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:27,315 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:27,315 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:27,315 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 02:51:27,316 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 02:51:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 02:51:27,317 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:27,317 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:27,317 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 02:51:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1033971711, now seen corresponding path program 1 times [2018-01-21 02:51:27,318 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:27,318 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,319 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:27,319 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,319 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:27,327 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:27,359 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:27,360 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 02:51:27,360 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:27,360 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:51:27,360 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:51:27,360 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 02:51:27,361 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-21 02:51:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:27,421 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-01-21 02:51:27,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 02:51:27,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-01-21 02:51:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:27,423 INFO L225 Difference]: With dead ends: 55 [2018-01-21 02:51:27,424 INFO L226 Difference]: Without dead ends: 34 [2018-01-21 02:51:27,424 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:51:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-21 02:51:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-01-21 02:51:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-21 02:51:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-01-21 02:51:27,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 10 [2018-01-21 02:51:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:27,430 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-01-21 02:51:27,431 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:51:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-01-21 02:51:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 02:51:27,431 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:27,431 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:27,432 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 02:51:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1033969789, now seen corresponding path program 1 times [2018-01-21 02:51:27,432 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:27,433 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,433 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:27,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,434 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:27,445 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:27,466 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:27,466 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:51:27,466 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:27,466 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 02:51:27,466 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 02:51:27,467 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 02:51:27,467 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 3 states. [2018-01-21 02:51:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:27,500 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-01-21 02:51:27,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 02:51:27,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-21 02:51:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:27,501 INFO L225 Difference]: With dead ends: 34 [2018-01-21 02:51:27,501 INFO L226 Difference]: Without dead ends: 32 [2018-01-21 02:51:27,502 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 02:51:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-21 02:51:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-01-21 02:51:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-21 02:51:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-01-21 02:51:27,507 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 10 [2018-01-21 02:51:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:27,508 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-01-21 02:51:27,508 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 02:51:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-01-21 02:51:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 02:51:27,509 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:27,509 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, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:27,509 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 02:51:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1655323713, now seen corresponding path program 1 times [2018-01-21 02:51:27,510 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:27,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,511 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:27,511 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,511 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:27,538 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:27,731 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:27,731 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 02:51:27,731 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:27,732 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 02:51:27,732 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 02:51:27,732 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:51:27,732 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2018-01-21 02:51:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:27,881 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-01-21 02:51:27,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 02:51:27,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-21 02:51:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:27,882 INFO L225 Difference]: With dead ends: 31 [2018-01-21 02:51:27,882 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:51:27,883 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:51:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:51:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:51:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:51:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:51:27,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-01-21 02:51:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:27,884 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:51:27,884 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 02:51:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:51:27,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:51:27,887 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:27,887 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:27,887 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:27,888 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:27,888 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:27,888 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:27,888 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:27,888 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstpcpyErr0EnsuresViolation======== [2018-01-21 02:51:27,888 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 02:51:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 02:51:27,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:51:27,891 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:51:27,891 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstpcpyErr0EnsuresViolation]=== [2018-01-21 02:51:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash -476345640, now seen corresponding path program 1 times [2018-01-21 02:51:27,891 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:51:27,892 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,892 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:27,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:51:27,893 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:51:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:27,906 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:51:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:51:27,923 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:27,923 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:51:27,923 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:27,924 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:51:27,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:51:27,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:51:27,925 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2018-01-21 02:51:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:51:27,928 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-01-21 02:51:27,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:51:27,929 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 02:51:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:51:27,929 INFO L225 Difference]: With dead ends: 51 [2018-01-21 02:51:27,929 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:51:27,930 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 [2018-01-21 02:51:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:51:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:51:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:51:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:51:27,931 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-21 02:51:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:51:27,932 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:51:27,932 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:51:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:51:27,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:51:27,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 02:51:27 BoogieIcfgContainer [2018-01-21 02:51:27,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 02:51:27,936 INFO L168 Benchmark]: Toolchain (without parser) took 1932.39 ms. Allocated memory was 304.6 MB in the beginning and 463.5 MB in the end (delta: 158.9 MB). Free memory was 263.4 MB in the beginning and 368.8 MB in the end (delta: -105.5 MB). Peak memory consumption was 53.4 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:27,938 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 304.6 MB. Free memory is still 269.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:51:27,938 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.65 ms. Allocated memory is still 304.6 MB. Free memory was 263.4 MB in the beginning and 253.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:27,938 INFO L168 Benchmark]: Boogie Preprocessor took 40.85 ms. Allocated memory is still 304.6 MB. Free memory was 253.4 MB in the beginning and 251.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:27,939 INFO L168 Benchmark]: RCFGBuilder took 305.53 ms. Allocated memory is still 304.6 MB. Free memory was 251.4 MB in the beginning and 236.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:27,939 INFO L168 Benchmark]: TraceAbstraction took 1363.79 ms. Allocated memory was 304.6 MB in the beginning and 463.5 MB in the end (delta: 158.9 MB). Free memory was 234.4 MB in the beginning and 368.8 MB in the end (delta: -134.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:27,941 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 304.6 MB. Free memory is still 269.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 214.65 ms. Allocated memory is still 304.6 MB. Free memory was 263.4 MB in the beginning and 253.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.85 ms. Allocated memory is still 304.6 MB. Free memory was 253.4 MB in the beginning and 251.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 305.53 ms. Allocated memory is still 304.6 MB. Free memory was 251.4 MB in the beginning and 236.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1363.79 ms. Allocated memory was 304.6 MB in the beginning and 463.5 MB in the end (delta: 158.9 MB). Free memory was 234.4 MB in the beginning and 368.8 MB in the end (delta: -134.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 37 locations, 4 error locations. UNSAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L546] int length1 = __VERIFIER_nondet_int(); [L547] int length2 = __VERIFIER_nondet_int(); [L548] COND TRUE length1 < 1 [L549] length1 = 1 VAL [length1=1, length2=2] [L551] COND FALSE !(length2 < 1) VAL [length1=1, length2=2] [L554] COND TRUE length1 < length2 [L554] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 37 locations, 4 error locations. UNSAFE Result, 0.4s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 30 SDslu, 42 SDs, 0 SdLazy, 11 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 545]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 37 locations, 4 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 93 SDtfs, 53 SDslu, 74 SDs, 0 SdLazy, 99 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 5216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: cstpcpyErr0EnsuresViolation CFG has 4 procedures, 37 locations, 4 error locations. SAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 39 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_02-51-27-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_02-51-27-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_02-51-27-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_02-51-27-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_02-51-27-952.csv Received shutdown request...