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_precise.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 05:35:43,450 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:35:43,452 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:35:43,469 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:35:43,469 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:35:43,470 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:35:43,471 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:35:43,472 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:35:43,474 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:35:43,475 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:35:43,476 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:35:43,476 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:35:43,478 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:35:43,479 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:35:43,481 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:35:43,483 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:35:43,486 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:35:43,488 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:35:43,489 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:35:43,490 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:35:43,493 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:35:43,498 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:35:43,499 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:35:43,500 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_precise.epf [2018-01-21 05:35:43,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:35:43,511 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:35:43,512 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:35:43,512 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:35:43,512 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:35:43,513 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:35:43,513 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:35:43,514 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:35:43,515 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:35:43,516 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:35:43,516 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:35:43,516 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:35:43,516 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:35:43,517 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:35:43,517 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:35:43,517 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:35:43,517 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:35:43,517 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:35:43,517 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:35:43,518 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:35:43,518 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:35:43,518 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:35:43,518 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:35:43,518 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:35:43,519 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:35:43,519 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:35:43,519 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:35:43,519 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:35:43,520 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:35:43,520 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:35:43,520 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:35:43,520 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:35:43,520 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:35:43,521 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:35:43,521 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:35:43,521 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:35:43,521 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:35:43,522 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:35:43,522 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:35:43,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:35:43,575 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:35:43,579 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:35:43,581 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:35:43,582 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:35:43,583 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:35:43,782 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:35:43,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:35:43,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:35:43,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:35:43,795 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:35:43,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:43,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29142da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43, skipping insertion in model container [2018-01-21 05:35:43,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:43,818 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:35:43,854 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:35:43,977 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:35:43,992 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:35:43,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43 WrapperNode [2018-01-21 05:35:43,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:35:43,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:35:44,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:35:44,000 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:35:44,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (1/1) ... [2018-01-21 05:35:44,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:35:44,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:35:44,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:35:44,037 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:35:44,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (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 05:35:44,084 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:35:44,084 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:35:44,085 INFO L136 BoogieDeclarations]: Found implementation of procedure cstpcpy [2018-01-21 05:35:44,085 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure cstpcpy [2018-01-21 05:35:44,085 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:35:44,086 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:35:44,086 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:35:44,267 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:35:44,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:35:44 BoogieIcfgContainer [2018-01-21 05:35:44,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:35:44,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:35:44,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:35:44,270 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:35:44,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:35:43" (1/3) ... [2018-01-21 05:35:44,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e83c791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:35:44, skipping insertion in model container [2018-01-21 05:35:44,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:35:43" (2/3) ... [2018-01-21 05:35:44,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e83c791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:35:44, skipping insertion in model container [2018-01-21 05:35:44,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:35:44" (3/3) ... [2018-01-21 05:35:44,274 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:35:44,281 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:35:44,287 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 05:35:44,333 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:35:44,333 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:35:44,333 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:35:44,333 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:35:44,334 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:35:44,334 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:35:44,334 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:35:44,334 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:35:44,336 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:35:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 05:35:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:35:44,363 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:44,364 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:35:44,365 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:35:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 84570, now seen corresponding path program 1 times [2018-01-21 05:35:44,374 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:44,434 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,435 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:44,435 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,435 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:35:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:35:44,498 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:35:44,507 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:44,514 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:35:44,514 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:35:44,514 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:35:44,514 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:35:44,514 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:35:44,515 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:35:44,515 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:35:44,515 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:35:44,515 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:35:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 05:35:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 05:35:44,518 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:44,518 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:44,518 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:35:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1509367990, now seen corresponding path program 1 times [2018-01-21 05:35:44,518 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:44,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,519 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:44,519 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,520 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:44,548 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:35:44,629 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 05:35:44,631 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:44,631 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:35:44,631 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:44,633 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:35:44,643 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:35:44,644 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:35:44,648 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-21 05:35:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:44,804 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-01-21 05:35:44,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:35:44,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-21 05:35:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:44,820 INFO L225 Difference]: With dead ends: 55 [2018-01-21 05:35:44,820 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 05:35:44,823 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 05:35:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 05:35:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-01-21 05:35:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-21 05:35:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-01-21 05:35:44,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 12 [2018-01-21 05:35:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:44,864 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-01-21 05:35:44,864 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:35:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-01-21 05:35:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 05:35:44,864 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:44,865 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:44,865 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:35:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1507520948, now seen corresponding path program 1 times [2018-01-21 05:35:44,865 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:44,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,866 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:44,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,866 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:35:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:35:44,898 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:35:44,901 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:44,902 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:44,902 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:35:44,908 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:35:44,908 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:35:44,908 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:35:44,908 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:35:44,908 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:35:44,909 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:35:44,909 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:35:44,909 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:35:44,909 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:35:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 05:35:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 05:35:44,911 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:44,911 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:44,911 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1033971711, now seen corresponding path program 1 times [2018-01-21 05:35:44,912 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:44,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,912 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:44,913 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:44,913 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:44,924 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:35:44,956 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 05:35:44,956 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:44,956 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:35:44,956 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:44,957 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:35:44,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:35:44,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:35:44,957 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-21 05:35:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:45,017 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-01-21 05:35:45,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:35:45,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-01-21 05:35:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:45,019 INFO L225 Difference]: With dead ends: 55 [2018-01-21 05:35:45,019 INFO L226 Difference]: Without dead ends: 34 [2018-01-21 05:35:45,020 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 05:35:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-21 05:35:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-01-21 05:35:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-21 05:35:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-01-21 05:35:45,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 10 [2018-01-21 05:35:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:45,026 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-01-21 05:35:45,026 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:35:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-01-21 05:35:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 05:35:45,027 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:45,027 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:35:45,027 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1033969789, now seen corresponding path program 1 times [2018-01-21 05:35:45,028 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:45,028 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:45,029 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:45,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:45,029 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:45,040 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:35:45,063 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 05:35:45,063 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:45,063 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:35:45,063 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:45,064 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:35:45,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:35:45,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:35:45,064 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 3 states. [2018-01-21 05:35:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:45,088 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-01-21 05:35:45,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:35:45,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-21 05:35:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:45,090 INFO L225 Difference]: With dead ends: 34 [2018-01-21 05:35:45,090 INFO L226 Difference]: Without dead ends: 32 [2018-01-21 05:35:45,091 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 05:35:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-21 05:35:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-01-21 05:35:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-21 05:35:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-01-21 05:35:45,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 10 [2018-01-21 05:35:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:45,097 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-01-21 05:35:45,097 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:35:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-01-21 05:35:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 05:35:45,098 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:45,098 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 05:35:45,098 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:35:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1655323713, now seen corresponding path program 1 times [2018-01-21 05:35:45,098 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:45,099 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:45,099 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:45,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:45,100 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:45,128 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:35:45,414 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 05:35:45,415 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:45,415 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:35:45,415 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:45,415 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:35:45,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:35:45,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:35:45,416 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2018-01-21 05:35:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:45,619 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-01-21 05:35:45,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 05:35:45,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-21 05:35:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:45,620 INFO L225 Difference]: With dead ends: 31 [2018-01-21 05:35:45,620 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:35:45,621 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:35:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:35:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:35:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:35:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:35:45,622 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-01-21 05:35:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:45,622 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:35:45,622 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:35:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:35:45,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:35:45,625 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:35:45,625 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:35:45,625 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:35:45,625 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:35:45,626 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:35:45,626 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:35:45,626 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:35:45,626 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstpcpyErr0EnsuresViolation======== [2018-01-21 05:35:45,626 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:35:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 05:35:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 05:35:45,629 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:35:45,629 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 05:35:45,629 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstpcpyErr0EnsuresViolation]=== [2018-01-21 05:35:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash -476345640, now seen corresponding path program 1 times [2018-01-21 05:35:45,630 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:35:45,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:45,631 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:45,631 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:35:45,631 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:35:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:45,644 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:35:45,660 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 05:35:45,660 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:35:45,660 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:35:45,660 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:35:45,661 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:35:45,661 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:35:45,661 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:35:45,662 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2018-01-21 05:35:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:35:45,666 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-01-21 05:35:45,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:35:45,666 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 05:35:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:35:45,666 INFO L225 Difference]: With dead ends: 51 [2018-01-21 05:35:45,666 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:35:45,667 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 05:35:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:35:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:35:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:35:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:35:45,668 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-21 05:35:45,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:35:45,668 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:35:45,669 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:35:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:35:45,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:35:45,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 05:35:45 BoogieIcfgContainer [2018-01-21 05:35:45,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 05:35:45,674 INFO L168 Benchmark]: Toolchain (without parser) took 1892.23 ms. Allocated memory was 305.7 MB in the beginning and 467.7 MB in the end (delta: 162.0 MB). Free memory was 261.8 MB in the beginning and 373.8 MB in the end (delta: -111.9 MB). Peak memory consumption was 50.1 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:45,676 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 305.7 MB. Free memory is still 267.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 05:35:45,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.17 ms. Allocated memory is still 305.7 MB. Free memory was 260.8 MB in the beginning and 250.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:45,677 INFO L168 Benchmark]: Boogie Preprocessor took 36.96 ms. Allocated memory is still 305.7 MB. Free memory was 250.9 MB in the beginning and 248.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:45,677 INFO L168 Benchmark]: RCFGBuilder took 231.02 ms. Allocated memory is still 305.7 MB. Free memory was 248.9 MB in the beginning and 233.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:45,677 INFO L168 Benchmark]: TraceAbstraction took 1405.25 ms. Allocated memory was 305.7 MB in the beginning and 467.7 MB in the end (delta: 162.0 MB). Free memory was 232.9 MB in the beginning and 373.8 MB in the end (delta: -140.9 MB). Peak memory consumption was 21.1 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:45,680 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 305.7 MB. Free memory is still 267.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 211.17 ms. Allocated memory is still 305.7 MB. Free memory was 260.8 MB in the beginning and 250.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.96 ms. Allocated memory is still 305.7 MB. Free memory was 250.9 MB in the beginning and 248.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 231.02 ms. Allocated memory is still 305.7 MB. Free memory was 248.9 MB in the beginning and 233.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1405.25 ms. Allocated memory was 305.7 MB in the beginning and 467.7 MB in the end (delta: 162.0 MB). Free memory was 232.9 MB in the beginning and 373.8 MB in the end (delta: -140.9 MB). Peak memory consumption was 21.1 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, 0.1s 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, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s 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, 0.0s 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, 0.7s 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, 0.2s 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, 0.3s 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_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_05-35-45-691.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_05-35-45-691.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_05-35-45-691.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_05-35-45-691.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_05-35-45-691.csv Received shutdown request...